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provisional data. types r295ch36 to r295ch40 issue 1 page i august, 2000 evaluation laboratory rating report - issue 1 date - 30 august, 2000 origin - par 327 total pages - 15 provisional data distributed gate thyristor types r295ch36 to r295ch40 author checked approved n. tarling abstract the r295ch36-40 distributed gate thyristor range features regenerative and interdigitated gating on a 50mm diameter, silicon slice (manufacturing reference rstach) mounted in a cold weld capsule. low turn-on losses make it suitable for chopper, inverter and pulse applications. summary of changes to previous issue. issue 1 first issue - advance data. the information contained herein is confidential and is protected by copyright. the information may not be used or disclosed except with the written permission of and in the manner permitted by the proprietors westcode semiconductors ltd. in the interest of product improvement, westcode reserves the right to change specifications at any time without prior notice. devices with a suffix code (2-letter or letter/digit/letter combination) added to their generic code are not necessarily subject to the conditions and limits contained in this report.

provisional data. types r295ch36 to r295ch40 issue 1 page ii august, 2000 contents abstract....................................................................................................................... .................................. i contents....................................................................................................................... ................................ ii introduction ................................................................................................................... .............................. ii absolute maximum ratings ....................................................................................................... ................ 1 characteristics ................................................................................................................ ............................ 2 notes on ratings and characteristics ........................................................................................... ........... 3 1.0 voltage grade table ........................................................................................................ ................... 3 2.0 extension of voltage grades................................................................................................ ............... 3 3.0 extension of turn-off time ................................................................................................. ................. 3 4.0 repetitive dv/dt ........................................................................................................... ......................... 3 5.0 de-rating factor........................................................................................................... ........................ 3 6.0 rate of rise of on-state current........................................................................................... ................. 3 7.0 square wave ratings ........................................................................................................ .................... 3 8.0 duty cycle lines ........................................................................................................... ......................... 3 9.0 maximum operating frequency ................................................................................................ .......... 3 10.0 on-state energy per pulse characteristics................................................................................. ...... 4 11.0 reverse recovery ratings.................................................................................................. ................. 4 12.0 reverse recovery loss ..................................................................................................... ............... 4 12.1 determination by measurement .............................................................................................. ......................................... 4 12.2 determination without measurement ......................................................................................... ...................................... 5 note 1 - reverse recovery loss by measurement ................................................................................. 5 13.0 gate drive ................................................................................................................ ......................... 5 14.0 computer modelling parameters............................................................................................. .......... 6 14.1 calculating v t using abcd coefficients ....................................................................................................... ................... 6 14.2 d.c. thermal impedance calculation ........................................................................................ ...................................... 6 14.3 recovery parameter estimation ............................................................................................. .......................................... 7 curves ......................................................................................................................... ................................. 8 figure 1 - on-state characteristics of limit device ............................................................................ ........ 8 figure 2 - transient thermal impedance ......................................................................................... .......... 8 figure 3 - gate characteristics - trigger limits ............................................................................... ........... 8 figure 4 - gate characteristics - power curves ................................................................................. ........ 8 figure 5 - total recovered charge, q rr ....................................................................................................... 9 figure 6 - recovered charge, q ra (50% chord) ......................................................................................... 9 figure 7 - peak reverse recovery current, i rm ............................................................................................ 9 figure 8 - maximum recovery time, t rr (50% chord)................................................................................... 9 figure 9 - reverse recovery energy per pulse ................................................................................... ..... 10 figure 10 - sine wave energy per pulse ......................................................................................... ......... 10 figure 11 - sine wave frequency ratings, 55c heatsink......................................................................... 10 figure 12 - sine wave frequency ratings, 85c heatsink......................................................................... 10 figure 13 - square wave frequency ratings, 55c heatsink, 100a/s ..................................................... 11 figure 14 - square wave frequency ratings, 55c heatsink, 500a/s ..................................................... 11 figure 15 - square wave frequency ratings, 85c heatsink, 100a/s ..................................................... 11 figure 16 - square wave frequency ratings, 85c heatsink, 500a/s ..................................................... 11 figure 17 - square wave energy per pulse, 100a/s .............................................................................. 12 figure 18 - square wave energy per pulse, 500a/s .............................................................................. 12 figure 19 - maximum surge and i 2 t ratings ............................................................................................ 12 outline drawing & ordering information......................................................................................... ....... 13 introduction the r295 series of distributed gate thyristors have fast switching characteristics provided by a regenerative, interdigitated gate. they also exhibit low switching losses. they are therefore suitable for medium current, medium frequency applications.

provisional data sheet. types r295ch36 to r295ch40 issue 1 page 1 of 13 august, 2000 westcode date:- 30 aug, 2000 data sheet issue:- 1 provisional data distributed gate thyristor types r295ch36 to r295ch40 absolute maximum ratings voltage ratings maximum limits units v drm repetitive peak off-state voltage, (note 1) 3600-4000 v v dsm non-repetitive peak off-state voltage, (note 1) 3600-4000 v v rrm repetitive peak reverse voltage, (note 1) 3600-4000 v v rsm non-repetitive peak reverse voltage, (note 1) 3700-4100 v other ratings maximum limits units i t(av) mean on-state current, t sink =55c, (note 2) 890 a i t(av) mean on-state current. t sink =85c, (note 2) 610 a i t(av) mean on-state current. t sink =85c, (note 3) 365 a i t(rms) nominal rms on-state current, t sink =25c, (note 2) 1755 a i t(d.c.) d.c. on-state current, t sink =25c, (note 4) 1525 a i tsm peak non-repetitive surge t p =10ms, v rm =0.6v rrm , (note 5) 10.9 ka i tsm2 peak non-repetitive surge t p =10ms, v rm 10v, (note 5) 12 ka i 2 ti 2 t capacity for fusing t p =10ms, v rm =0.6v rrm , (note 5) 5.9410 5 a 2 s i 2 t i 2 t capacity for fusing t p =10ms, v rm 10v, (note 5) 7.2010 5 a 2 s maximum rate of rise of on-state current (repetitive), (note 6) 1000 a/s di t /dt maximum rate of rise of on-state current (non-repetitive), (note 6) 1500 a/s v rgm peak reverse gate voltage 5 v p g(av) mean forward gate power 2 w p gm peak forward gate power 30 w v gd non-trigger gate voltage, (note 7) 0.25 v t hs operating temperature range -40 to +125 c t stg storage temperature range -40 to +150 c notes:- 1) de-rating factor of 0.13% per c is applicable for t j below 25c. 2) double side cooled, single phase; 50hz, 180 half-sinewave. 3) single side cooled, single phase; 50hz, 180 half-sinewave. 4) double side cooled. 5) half-sinewave, 125c t j initial. 6) v d =67% v drm , i fg =2a, t r 0.5s, t case =125c. 7) rated v drm .

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 2 of 13 august, 2000 characteristics parameter min. typ. max. test conditions (note 1) units v tm maximum peak on-state voltage - - 2.98 i tm =1830a v v 0 threshold voltage - - 1.516 v r s slope resistance - - 0.8 m ? dv/dt critical rate of rise of off-state voltage - - 200 v d =80% v drm v/ s i drm peak off-state current - - 100 rated v drm ma i rrm peak reverse current - - 100 rated v rrm ma v gt gate trigger voltage - - 3.0 t j =25c v i gt gate trigger current - - 300 t j =25c v d =10v, i t =3a ma i h holding current - - 1000 t j =25c ma q ra recovered charge, 50% chord - 1750 - i tm =1000a, t p =1000s, di/dt=60a/s, v r =50v c - - 350 i tm =1000a, t p =1000s, di/dt=60a/s, v r =50v, v dr =33%v drm , dv dr /dt=20v/s t q turn-off time - - 550 i tm =1000a, t p =1000s, di/dt=60a/s, v r =50v, v dr =33%v drm , dv dr /dt=200v/s s - - 0.024 double side cooled k/w r thermal resistance, junction to heatsink - - 0.049 single side cooled k/w f mounting force 19 - 26 kn w t weight - 510 - g notes:- 1) unless otherwise indicated t j =125 c.

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 3 of 13 august, 2000 notes on ratings and characteristics 1.0 voltage grade table voltage grade 'h' v drm v dsm v rrm v v rsm v v d v r dc v 36 3600 3700 1900 38 3800 3900 1960 40 4000 4100 2000 2.0 extension of voltage grades this report is applicable to other and higher voltage grades when supply has been agreed by sales/production. 3.0 extension of turn-off time this report is applicable to other t q /re-applied dv/dt combinations when supply has been agreed by sales/production. 4.0 repetitive dv/dt higher dv/dt selections are available up to 1000v/s on request. 5.0 de-rating factor a blocking voltage de-rating factor of 0.13%/c is applicable to this device for t j below 25 o c. 6.0 rate of rise of on-state current the maximum un-primed rate of rise of on-state current must not exceed 1500a/s at any time during turn-on on a non-repetitive basis. for repetitive performance, the on-state rate of rise of current must not exceed 1000a/s at any time during turn-on. note that these values of rate of rise of current apply to the total device current including that from any local snubber network. 7.0 square wave ratings these ratings are given for load component rate of rise of forward current of 100 and 500 a/s. 8.0 duty cycle lines the 100% duty cycle is represented on all the ratings by a straight line. other duties can be included as parallel to the first. 9.0 maximum operating frequency the maximum operating frequency is set by the on-state duty, the time required for the thyristor to turn off (t q ) and for the off-state voltage to reach full value (t v ), i.e. v q pulse t t t f + + = 1 max

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 4 of 13 august, 2000 10.0 on-state energy per pulse characteristics these curves enable rapid estimation of device dissipation to be obtained for conditions not covered by the frequency ratings. let e p be the energy per pulse for a given current and pulse width, in joules let r th(j-hs) be the steady-state d.c. thermal resistance (junction to sink) and t sink be the heat sink temperature. then the average dissipation will be: () ( ) hs j th av sink p av r w t and f e w ? ? ? = ? = 125 .) (max 11.0 reverse recovery ratings (i) q ra is based on 50% i rm chord as shown in fig. 1 below. fig. 1 (ii) q rr is based on a 150 s integration time. i.e. = s rr rr dt i q 150 0 . (iii) 2 1 t t factor k = 12.0 reverse recovery loss 12.1 determination by measurement from waveforms of recovery current obtained from a high frequency shunt (see note 1, page 5) and reverse voltage present during recovery, an instantaneous reverse recovery loss waveform must be constructed. let the area under this waveform be e joules per pulse. a new heat sink temperature can then be evaluated from: () ( ) hs j th original sink new sink r f k e t t ? ? + ? ? = ) ( ) ( where k = 0.227 (c/w)/s e = area under reverse loss waveform per pulse in joules (w.s.) f = rated frequency hz at the original heat sink temperature. r th(j-hs) = d.c. thermal resistance (c/w).

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 5 of 13 august, 2000 the total dissipation is now given by: f e w w (original) (tot) ? + = 12.2 determination without measurement in circumstances where it is not possible to measure voltage and current conditions, or for design purposes, the additional losses e in joules may be estimated as follows. let e be the value of energy per reverse cycle in joules (curves in figure 9). let f be the operating frequency in hz () ( ) () f r e t t th original sink new sink ? ? ? = where t sink (new) is the required maximum heat sink temperature and t sink (original) is the heat sink temperature given with the frequency ratings. a suitable r-c snubber network is connected across the thyristor to restrict the transient reverse voltage to a peak value (v rm ) of 67% of the maximum grade. if a different grade is being used or v rm is other than 67% of grade, the reverse loss may be approximated by a pro rata adjustment of the maximum value obtained from the curves. note 1 - reverse recovery loss by measurement this thyristor has a low reverse recovered charge and peak reverse recovery current. when measuring the charge care must be taken to ensure that: (a) a.c. coupled devices such as current transformers are not affected by prior passage of high amplitude forward current. (b) a suitable, polarised, clipping circuit must be connected to the input of the measuring oscilloscope to avoid overloading the internal amplifiers by the relatively high amplitude forward current signal (c) measurement of reverse recovery waveform should be carried out with an appropriate critically damped snubber, connected across diode anode to cathode. the formula used for the calculation of this snubber is shown below: dt di s r c v r ? ? = 4 2 where: v r = commutating source voltage c s = snubber capacitance r = snubber resistance 13.0 gate drive the recommended pulse gate drive is 20v, 10 ? with a short-circuit current rise time of not more than 0.5s. this gate drive must be applied when using the full di/dt capability of the device. the duration of pulse may need to be configured with respect to the application but should be no shorter than 20s, otherwise an increase in pulse current could be needed to supply the resulting increase in charge to trigger.

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 6 of 13 august, 2000 14.0 computer modelling parameters 14.1 calculating v t using abcd coefficients the on-state characteristic i t vs v t , on page 8 is represented in two ways; (i) the well established v o and r s tangent used for rating purposes and (ii) a set of constants a, b, c, d, forming the coefficients of the representative equation for v t in terms of i t given below: () t t t t i d i c i b a v ? + ? + ? + = ln the constants, derived by curve fitting software, are given in this report for hot and cold characteristics where possible. the resulting values for v t agree with the true device characteristic over a current range, which is limited to that plotted. 25c coefficients 125c coefficients a 0.78163983 a 0.66032723 b 0.4140327 b 0.169496 c 1.1110110 -3 c 8.4655610 -4 d -0.0744794 d -0.01175336 14.2 d.c. thermal impedance calculation = = ? ? ? ? ? ? ? ? ? ? ? = n p p t p t p e r r 1 1 where p = 1 to n, n is the number of terms in the series. t = duration of heating pulse in seconds. r t = thermal resistance at time t. r p = amplitude of p th term. p = time constant of r th term. d.c. double side cooled term12345 r p 0.01249139 6.31683310 -3 1.85085510 -3 1.92204510 -3 6.13533010 -4 p 0.8840810 0.1215195 0.03400152 6.74290810 -3 1.32629210 -3 d.c. single side cooled term123456 r p 0.02919832 4.86356810 -3 3.74479810 -3 6.81803410 -3 2.18355810 -3 1.84829410 -3 p 6.298105 3.286174 0.5359179 0.1186897 0.02404574 3.37947610 -3

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 7 of 13 august, 2000 14.3 recovery parameter estimation maximum recovery parameters may be calculated, using the polynomial expression: ? = = ? ? ? ? ? ? ? = 1 0 n p p p r p dt di k y where: y = recovery parameter (q rr , q ra , i rm or t rr ) k p = coefficient found in the relevant table below, n = number of terms in the series, p = term number total recovered charge q rr (valid di/dt range 20 to 300a/s) values of k p for q rr p 500a 1000a 1500a 2000a 4 -2.062254310 -6 -2.205663110 -6 -2.505402310 -6 -2.722208710 -6 3 1.428683210 -3 1.544388110 -3 1.756894110 -3 1.910692110 -3 2 -0.352415992 -0.390738814 -0.446128035 -0.486278552 1 41.76920981 50.80017722 58.83394938 64.70561695 0 3767.685746 4241.086994 4225.007007 4267.417972 recovered charge q ra , 50% chord (valid di/dt range 20 to 300a/s) values of k p for q ra p 500a 1000a 1500a 2000a 4 -2.854822810 -7 -5.433644010 -7 -6.575939210 -7 -7.396407410 -7 3 1.984470010 -4 3.787157110 -4 4.588423610 -4 5.164859110 -4 2 -0.0493 -0.0948 -0.115 -0.130 1 6.013771819 11.81697719 14.49737795 16.46104931 0 1720.160363 1835.232091 1876.536965 1907.690427 peak reverse recovery current i rm (valid di/dt range 20 to 300a/s) values of k p for i rm p 500a 1000a 1500a 2000a 4 -1.743608310 -7 -1.857858110 -7 -1.918188510 -7 -2.001652010 -7 3 1.253118710 -4 1.336240010 -4 1.381032610 -4 1.441815110 -4 2 -0.0339 -0.0362 -0.0375 -0.0392 1 6.002345656 6.487724072 6.83017228 7.19419231 0 98.05266242 102.396008 102.971631 106.1485226 reverse recovery time t rr (valid di/dt range 20 to 300a/s) values of k p for t rr p 500a 1000a 1500a 2000a 4 5.089327610 -8 5.017508010 -8 5.862459310 -8 6.055321810 -8 3 -3.423977610 -5 -3.379270010 -5 -3.936086010 -5 -4.078506310 -5 2 7.890108910 -3 7.821074410 -3 9.054801710 -3 9.432520310 -3 1 -0.75674596 -0.76019049 -0.868500043 -0.913103681 0 35.01468618 36.93828257 41.0544367 44.07751035

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 8 of 13 august, 2000 curves figure 1 - on-state characteristics of limit device figure 2 - transient thermal impedance 100 1000 10000 0246810 instantaneous on-state voltage - v t (v) instantaneous on-state current - i t (a) t j = 125c t j = 25c r295ch36-40 issue 1 0.00001 0.0001 0.001 0.01 0.1 0.0001 0.001 0.01 0.1 1 10 100 time (s) transient thermal impedance - z (th)t (k/w) ssc 0.049k/w dsc 0.024k/w r295ch36-40 issue 1 figure 3 - gate characteristics - trigger limits figure 4 - gate characteristics - power curves 0 1 2 3 4 5 6 0 0.2 0.4 0.6 0.8 1 gate trigger current - i gt (a) gate trigger voltage - v gt (v) i gd , v gd i gt , v gt min v g dc max v g dc t j =25c 125c 25c -10c -40c r295ch36-40 issue 1 0 2 4 6 8 10 12 14 16 18 20 0246810 gate trigger current - i gt (a) gate trigger voltage - v gt (v) p g 2w dc p g max 30w dc min v g dc max v g dc t j =25c r295ch36-40 issue 1

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 9 of 13 august, 2000 figure 5 - total recovered charge, q rr figure 6 - recovered charge, q ra (50% chord) 1000 10000 10 100 1000 commutation rate - di/dt (a/s) total recovered charge - q rr (c) 2000a t j = 125c 1500a 1000a 500a r295ch36-40 issue 1 1000 10000 10 100 1000 commutation rate - di/dt (a/s) recovered charge - q ra (c) 1500a t j = 125c 2000a 1000a 500a r295ch36-40 issue 1 figure 7 - peak reverse recovery current, i rm figure 8 - maximum recovery time, t rr (50% chord) 100 1000 10000 10 100 1000 commutation rate - di/dt (a/s) reverse recovery current - i rm (a) 2000a 1500a 1000a 500a t j = 125c r295ch36-40 issue 1 1 10 100 10 100 1000 commutation rate - di/dt (a/s) reverse recovery time - t rr (s) t j = 125c 2000a 1500a 1000a 500a r295ch36-40 issue 1

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 10 of 13 august, 2000 figure 9 - reverse recovery energy per pulse figure 10 - sine wave energy per pulse 1 10 100 10 100 1000 commutation rate - di/dt (a/s) energy per pulse - e r (j) measured without snubber t j = 125c v r = 1000v r295ch36-40 issue 1 2000a 1500a 1000a 500a 1.00e-02 1.00e-01 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) energy per pulse (j) 3ka 2ka 1.5ka 1ka t j =125c 5ka 500a r295ch36-40 issue 1 figure 11 - sine wave frequency ratings figure 12 - sine wave frequency ratings 1.00e+01 1.00e+02 1.00e+03 1.00e+04 1.00e+05 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) frequency (hz) 3ka 5ka 2ka 1.5ka 1ka t hs =55c 100% duty cycle r295ch36-40 issue 1 500a 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e+04 1.00e+05 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) frequency (hz) 5ka 3ka 1.5ka 1ka 2ka t hs =85c 100% duty cycle 500a r295ch36-40 issue 1

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 11 of 13 august, 2000 figure 13 - square wave frequency ratings figure 14 - square wave frequency ratings 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e+04 1.00e+05 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) frequency (hz) 3ka 2ka 1.5ka 500a 5ka di/dt=100a/s t hs =55c 100% duty cycle r295ch36-40 issue 1 1ka 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e+04 1.00e+05 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) frequency (hz) 2ka 1.5ka 1ka 500a di/dt=500a/s t hs =55c 100% duty cycle 5ka 3ka r295ch36-40 issue 1 figure 15 - square wave frequency ratings figure 16 - square wave frequency ratings 1.00e+01 1.00e+02 1.00e+03 1.00e+04 1.00e+05 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) frequency (hz) 3ka 2ka 1.5ka 1ka 500a di/dt=100a/s t hs =85c 100% duty cycle 5ka r295ch36-40 issue 1 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e+04 1.00e+05 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) frequency (hz) 3ka 2ka 1.5ka 1ka di/dt=500a/s t hs =85c 100% duty cycle 5ka r295ch36-40 issue 1 500a

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 12 of 13 august, 2000 figure 17 - square wave energy per pulse figure 18 - square wave energy per pulse 1.00e-02 1.00e-01 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) energy per pulse (j) 3ka 2ka 1.5ka 1ka 500a di/dt=100a/s t j =125c 5ka r295ch36-40 issue 1 1.00e-01 1.00e+00 1.00e+01 1.00e+02 1.00e+03 1.00e-05 1.00e-04 1.00e-03 1.00e-02 pulse width (s) energy per pulse (j) t j =125c di/dt=500a/s r295ch36-40 issue 1 1.5ka 1ka 500a 5ka 3ka 2ka figure 19 - maximum surge and i 2 t ratings 1000 10000 100000 total peak half sine surge current - i tsm (a) 1.00e+05 1.00e+06 1.00e+07 maximum i 2 t (a 2 s) 1 35101 510 50100 duration of surge (ms) duration of surge (cycles @ 50hz) t j (initial) = 125c i 2 t: v rrm 10v i 2 t: 60% v rrm i tsm : v rrm 10v i tsm : 60% v rrm gate may temporarily lose control of conduction angle r295ch36-40 issue 1

westcode positive development in power electronics r295ch36 to r295ch40 provisional data sheet. types r295ch36 to r295ch40 issue 1 page 13 of 13 august, 2000 outline drawing & ordering information ordering information (please quote 11 or 12 digit code as below) r295 ch ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ( ? ? ? ? ) ? ? ? ? fixed type code fixed outline code off-state voltage code v drm /100 36-40 dv/dt code c=20v/s, d=50v/s, e=100v/s, f=200v/s t q code f=50s, y=55s, 2h=60s, w=65s, 2g=70s, e=75s, d=100s v rrm code see note 1 below note 1.: a single digit represents v rrm in 10% increments of the selected v drm . a zero in this position indicates that v rrm =100% v drm . the examples shown below are for 80% and 100% respectively. typical order code: r295ch40e2g8 ? 2.8kv v drm , 2.24kv v rrm , 100v/s dv/dt, 70s t q , 27.7mm clamp height capsule. typical order code: r295ch40e2g0 ? 2.8kv v drm , 2.8kv v rrm , 100v/s dv/dt, 70s t q , 27.7mm clamp height capsule. westcode internet: http://www.westc ode.com uk: westcode semiconductors ltd. p.o. box 57, chippenham, wiltshire, england. sn15 1jl. tel: +44 (0) 1249 444524 fax: +44 (0) 1249 659448 e-mail: wsl.sales@westcode.com usa: westcode semiconductors inc. 3270 cherry avenue, long beach, california 90807 tel: 562 595 6971 fax: 562 595 8182 e-mail: wsi.sales@westcode.com the information contained herein is confidential and is protected by copyright. the information may not be used or disclosed except with the written permission of and in the manner permitted by the proprietors westcode semiconductors ltd. in the interest of product improvement, westcode reserves the right to change specifications at any time without prior notice. devices with a suffix code (2-letter or letter/digit/letter combination) added to their generic code are not necessarily subjec t to the conditions and limits contained in this report. ? westcode semiconductors ltd.

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