surface mount 1.0 w glass zener diodes www. microsemi . com scottsdale division 1n4728ur thru 1n4764aur,e3 (or mll4728a thru mll4764a,e3) 1n4728aur thru 1n4764aur description appearance this surface mountable 1 watt zener diode series is electrically equivalent to the 1n4728a thru 1n4764a registration in the do-41 equivalent package except that it meets t he jedec surface mount outline do-213ab. it is an ideal selection for applications of high density and low parasitic requirements for voltage regulation. standard voltage tolerance is +/- 5% with tighter tolerances available down to 1%. with its glass hermetic qualities, it may also be used for high reliability applications when required by a source control drawing (scd). do-213ab important: for the most current data, consult microsemi?s website: http://www.microsemi.com , e3 features applications / benefits ? electrically similar to the jedec registered 1n4728 thru 1n4764 zener series ? zener voltages available 3.3v to 100v ? standard voltage tolerances are +/- 5% with ?a? suffix and 10 % with no suffix identification ? tight tolerances available in plus or minus 2% or 1% with c or d suffix respectively ? options for screening in accordance with mil-prf-19500 for jan, jantx, jantxv, and jans are available by adding mq, mx, mv, or msp prefixes respectively to part numbers. ? surface mount equivalents also available as smaj4728a to smaj4764a and smaj4728a to smaj4764a ? rohs compliant devices also available by adding e3 suffix ? plastic body axial-leaded zener equivalents are also available as 1n4728a to 1n4764a ? regulates voltage over a broad operating current and temperature range ? wide selection from 3.3 to 100 v ? leadless package for surface mounting ? ideal for high density mounting ? nonsensitive to esd ? hermetically sealed glass package ? specified capacitance (see figure 2) ? inherently radiation hard per micronote 050 maximum ratings mechanical and packaging ? power dissipation at 25 o c: 1.0 watts (also see derating in figure 1). ? operating and storage temperature: -65 o c to +175 o c ? thermal resistance: 50 o c/w junction to end cap, or 130 o c/w junction to ambient when mounted on fr4 pc board (1 oz cu) with recommended footprint (see last page) ? steady-state power: 1.00 watts at t ec < 125 o c, or 1.00 watts at t a < 45 o c when mounted on fr4 pc board and recommended footprint as described for thermal resistance (also see figure 1) ? forward voltage @200 ma: 1.2 volts (maximum) ? solder temperatures: 260 o c for 10 s (max) ? case: hermetically sealed do-213ab glass melf ? terminals: tin-lead or rohs compliant annealed matte-tin plating solderable per mil-std- 750, method 2026 ? polarity: cathode indicated by band. diode to be operated with the banded end positive with respect to the opposite end for zener regulation ? marking: cathode band only ? tape & reel optional: standard per eia-481-b with 12 mm tape, 1500 per 7 inch reel or 5000 per 13 inch reel (add ?tr? suffix to part number) ? weight: 0.05 grams ? see package dimensions & recommended mounting pad on last page microsemi scottsdale division page 1 copyright ? 2005 10-18-2005 rev d 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
surface mount 1.0 w glass zener diodes www. microsemi . com scottsdale division 1n4728ur thru 1n4764aur,e3 (or mll4728a thru mll4764a,e3) 1n4728aur thru 1n4764aur electrical characteristics @ t c = 30 o c zener voltage (note 4) v z test current i zt maximum dynamic impedance (note 2) z zt @ i zt maximum reverse current i r @ v r test voltage v r maximum regulator current t a = 50 o c i zm maximum knee impedance (note2) z zk @ i zk test current i zk maximum (surge) current (note 3) i s type number (note 1 & 5) volts ma ohms a volts ma ohms ma ma 1n4728aur 1n4729aur 1n4730aur 1n4731aur 3.3 3.6 3.9 4.3 76 69 64 58 10 10 9 9 100 100 50 10 1 1 1 1 276 252 234 217 400 400 400 400 1.0 1.0 1.0 1.0 1380 1260 1190 1070 1n4732aur 1n4733aur 1n4734aur 1n4735aur 4.7 5.1 5.6 6.2 53 49 45 41 8 7 5 2 10 10 10 10 1 1 2 3 193 178 162 146 500 550 600 700 1.0 1.0 1.0 1.0 970 890 810 730 1n4736aur 1n4737aur 1n4738aur 1n4739aur 6.8 7.5 8.2 9.1 37 34 31 28 3.5 4.0 4.5 5.0 10 10 10 10 4 5 6 7 133 121 110 100 700 700 700 700 1.0 0.5 0.5 0.5 660 605 550 500 1n4740aur 1n4741aur 1n4742aur 1n4743aur 10 11 12 13 25 23 21 19 7 8 9 10 10 5 5 5 7.6 8.4 9.1 9.9 91 83 76 69 700 700 700 700 0.25 0.25 0.25 0.25 454 414 380 344 1n4744aur 1n4745aur 1n4746aur 1n4747aur 15 16 18 20 17 15.5 14 12.5 14 16 20 22 5 5 5 5 11.4 12.2 13.7 15.2 61 57 50 45 700 700 750 750 0.25 0.25 0.25 0.25 304 285 250 225 1n4748aur 1n4749aur 1n4750aur 1n4751aur 22 24 27 30 11.5 10.5 9.5 8.5 23 25 35 40 5 5 5 5 16.7 18.2 20.6 22.8 41 38 34 30 750 750 750 1000 0.25 0.25 0.25 0.25 205 190 170 150 1n4752aur 1n4753aur 1n4754aur 1n4755aur 33 36 39 43 7.5 7.0 6.5 6.0 45 50 60 70 5 5 5 5 25.1 27.4 29.7 32.7 27 25 23 22 1000 1000 1000 1500 0.25 0.25 0.25 0.25 135 125 115 110 1n4756aur 1n4757aur 1n4758aur 1n4759aur 47 51 56 62 5.5 5.0 4.5 4.0 80 95 110 125 5 5 5 5 35.8 38.8 42.6 47.1 19 18 16 14 1500 1500 2000 2000 0.25 0.25 0.25 0.25 95 90 80 70 1n4760aur 1n4761aur 1n4762aur 1n4763aur 68 75 82 91 3.7 3.3 3.0 2.8 150 175 200 250 5 5 5 5 51.7 56.0 62.2 69.2 13 12 11 10 2000 2000 3000 3000 0.25 0.25 0.25 0.25 65 60 55 50 1n4764aur 100 2.5 350 5 76.0 9 3000 0.25 45 note 1: the type numbers shown with an ?a? suffix have a +/-5% tolerance on the nominal zener voltage. also available with suffix ?c? for +/-2%, and ?d? for +/-1%, while the absence of a suffix letter denotes +/- 10% tolerance. note 2: the zener impedance is derived from the 60hz ac voltage, which results when an ac current having an rms value equal to 10% of the dc zener current (i zt or i zk ) is superimposed on i zt or i zk . zener impedance is measured at two points to ensure a sharp knee on the breakdown curve and eliminate unstable units. note 3: the reverse surge current is measured at 25 o c ambient using a ? square wave or equivalent sine wave pulse 1/120 second duration superimposed on i zt . note 4: voltage measurements to be performed 90 seconds after application of dc current. note 5: this product series has also been previously ident ified as the mll4728a thru mll4764a series. this alternate name m ay still be used. , e3 microsemi scottsdale division page 2 copyright ? 2005 10-18-2005 rev d 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
surface mount 1.0 w glass zener diodes www. microsemi . com scottsdale division 1n4728ur thru 1n4764aur,e3 (or mll4728a thru mll4764a,e3) 1n4728aur thru 1n4764aur graphs steady-state power derating p d power dissipation (watts) t a t ec temperature ( o c ) figure 2 figure 1 power derating curve where t ec is end cap temp and t a is ambient temperature on fr4 pc board. package dimensions , e3 microsemi scottsdale division page 3 copyright ? 2005 10-18-2005 rev d inches millimeters dim min max min max a 0.094 0.105 2.39 2.66 b 0.189 0.205 4.80 5.20 c 0.016 0.022 0.41 0.55 inches mm a .276 7.00 b 0.070 1.8 c 0.110 2.8 pad layout 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
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