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models i nput v oltage and c urrent b5-3 input (v) 0 - 40 0 - 40 0 - 40 current ( a) 1.75 3.8 5.0 description the fm-461, fma-461, and fmb-461 emi filter modules have been specifically designed to reduce the input line reflected ripple current of interpoints mto, mtw, mhe, mlp, and mfw series of dc/dc converters. they are intended for use in applications of high frequency ( 100 khz) switch-mode dc/dc converters which must meet mil-std-461c levels of conducted power line noise. these filters are built using thick-film hybrid technology and are sealed in metal packages for military, aerospace, and other high- reliability applications. see section b8, cases h3, h5, k4, and k6 for dimensions. see section c2 for screening options. mil-std n oise m anagement when used in conjunction with interpoints dc/dc converters (see connection diagram, figure 2), the input ripple current will be reduced by 40 db within the frequency band of 100 khz to 50 mhz. this gives the filter/converter combination a performance which exceeds the ce03 test limit of mil-std-461c. the ce03 perform- ance of a model mhe2805s converter with and without the fm-461 filter is shown in figures 6 and 7. f ilter o peration a fast-reacting (1 picosecond) transient suppressor clamps the input voltage at approximately 47 v, protecting the dc/dc converter from line induced transients. the filters are rated to operate, with no degradation of performance, over the temperature range of ?5? to +85? (as measured at the baseplate). above 85?, input voltage and current must be derated as specified in ?erating?on the following page. the maximum power dissipation of the filters at maximum input current represents a power loss of less than 3% at typical input voltage. l ayout r equirements the case of the filter must be connected to the case of the converter through a low impedance connection to minimize emi. emi i nput f ilters 28 v olt i nput fm-461, fma-461 and fmb-461 emi filters 1.75 to 5 amp f eatures ?5? to +85? operation 0 to 40 vdc volt input up to 40 db attenuation 110 khz to 50 mhz transient suppression compliant to mil-std-461c, ce03 size (max.): non-flanged case h3 or h5 2.125 x 1.125 x 0.495* inches (53.98 x 28.58 x 12.57* mm) flanged case k4 or k6 2.910 x 1.125 x 0.495* inches (73.91 x 28.58 x 12.57* mm) see section b8, cases h3, h5, k4, and k6, for dimensions. *height varies depending on model. weight: maximum ?fm-461 38 grams, fma-461 42 grams, fmb-461 43 grams screening: standard or es. see section c2 for screening options, see section a5 for ordering information.
recommended operating conditions derating absolute maximum ratings input voltage 0 to 40 vdc continuous lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +135? isolation 100 megohm minimum at 500 v any pin to case (except case pin) b5-4 fm-461 emi filter 1.75 to 5 amp input voltage range 0 to 40 vdc continuous case operating temperature (tc) ?5? to +85? full power ?5? to +125? absolute electrical characteristics: 25? tc, nominal vin, unless otherwise specified. emi i nput f ilters fm-461 fma-461 fmb-461 parameter condition min typ max min typ max min typ max units input voltage continuous 0 28 40 0 28 40 0 28 40 vdc input clamping ?5? 38.9 43.2 47.5 38.9 43.2 47.5 38.9 43.2 47.5 voltage +25? 42.3 47.0 51.7 42.3 47.0 51.7 42.3 47.0 51.7 vdc +125? 44.9 49.9 54.8 44.9 49.9 54.8 44.9 49.9 54.8 input current dc 1.75 3.8 5.0 a ripple 0.67 1.0 1.2 a rms noise rejection 15 khz - 50 mhz 40 40 40 db dc resistance (r dc ) steady state 0.38 0.42 0.07 0.10 0.15 0.07 0.09 0.10 capacitance any pin to case 1900 2200 3700 4400 6450 8000 pf output voltage 1 steady state v out = v in - i in (r dc ) vdc output current steady state 1.75 3.8 5.0 a power dissipation max. current 1.3 1.6 2.5 w note 1. typical applications result in vout within 2% of vin. input voltage derate linearly from 100% at 85? case to the 33 vdc at 125? case input ripple current derate linearly from 100% at 85? case to the following at 125? case 270 ma rms fm-461 400 ma rms fma-461 480 ma rms fmb-461 dc input and output current derate linearly from 100% at 85? case to the following at 125? case 750 ma fm-461 1.7 a fma-461 1.7 a fmb-461 x2 0.1 m f 0.01 m f 0.001 m f 4.7 m f 150 v 47 pf 1000 pf 50 v 1000 pf 500 v positive input input common positive output output common fm-461 469 m h 2.4 m h f igure 1: s chematic
b5-5 fm-461 emi filter 1.75 to 5 amp emi i nput f ilters +vin +vout input common output common case r l r l emi filter dc/dc converter +vin +vout input common output common case chassis ground multiple units allowed up to rated output current of filter the case ground connection should be as low an impedance as possible to minimize emi. direct contact of baseplate to chassis ground provides the lowest impedance. f igure 4: c onnection d iagram x3 x2 0.1 m f 0.01 m f 0.001 m f x2 x2 4.7 m f 150 v 47 pf 1000 pf 50 v 1000 pf 500 v positive input input common positive output output common fma-461 2.4 m h >150 m h f igure 2: s chematic 4.7 m f 3300 pf 500 v positive input input common positive output output common fmb-461 3.5 m h 9.4 m f 0.65 v 3.5 m h 50 v 47 pf 500v p6ke47 18.8 m f f igure 3: s chematic
b5-6 typical performance curves: 25? tc , nominal vin, unless otherwise specified. 90 70 50 30 .015 .1 1 10 50 10 emission level (dma) frequency (mhz) ce03 limit f igure 6 90 70 50 30 .015 .1 1 10 5 0 10 emission level (dma) frequency (mhz) ce03 limit f igure 7 fm-461 emi filter 1.75 yo 5 amp emi i nput f ilters mhe converter without filter mhe converter with fm-461 emi filter pin out 12 3 4 5 squared corner and dot on top of package indicate pin one. bottom view fm-461, fma-461, fmb-461 dotted line outlines flanged package option. fmb - 461 f / es base model mil-std-461 reference screening fm, fma, or fmb (standard screening has no designator in this position) case option (non-flanged case has no designator in this position) model numbering key see section b8, cases h3, h5, k4, and k6, for dimensions. pin designation 1 positive input 2 positive output 3 case ground 4 output common 5 input common f igure 5: p in o ut 26221-001-dts rev a dq# 14006 all technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. interpoint reserves the right to make changes in products or specifications without notice. copyright 1990 - 1999 interpoint. all rights reserved.
b8-17 case h c ases case h bottom view see figures 29 ?34 for pin configurations. 2.125 max (53.98) 1.125 max (28.58) materials header cold rolled steel/nickel/gold cases h1 and h2 cold rolled steel/nickel/tin cases h3, h4, and h5 cover kovar/nickel cases h1 and h2 cold rolled steel/nickel/tin cases h3, h4, and h5 pins #52 alloy ceramic seal case h1 case h2 (except mhv series single and dual) compression glass seal mhv series single and dual case h3, h4, h5 case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300 c for 10 seconds per pin. dot on top of case indicates pin one 0.155 (3.94) 0.955 (24.26) seam seal 0.000 0.040 dia (1.02) 0.000 0.000 0.400 max. (10.16) 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 1.110 (28.19) 12 3 4 5 fmc emi filter: screening ?standard, es, or 883 sfmc emi filter: screening ?space standard, h, or k bottom view case h1 squared corner and dot on top of case indicate pin one. f igure 29: c ase h1 f igure 28: c ase h m aximum d imensions note: although every effort has been made to render the case drawings at actual size, variations in the printing process may ca use some distortion. please refer to the numerical dimensions for accuracy.
b8-19 case h c ases 0.160 (4.06) 0.960 (24.38) solder seal solder tip-off 0.000 0.040 dia (1.02) 0.000 0.000 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) 0.560 (14.22) 0.255 (6.48) 1.855 (47.12) 2.110 (53.59) 1.120 (28.45) 12 4 5 fm-461 emi filter: screening ?standard of es bottom view case h3 0.417 max (10.59) squared corner and dot on top of case indicate pin one. 3 f igure 31: c ase h3
b8-21 case h c ases 0.160 (4.06) 0.960 (24.38) solder seal solder tip-off 0.000 0.040 dia (1.02) 0.000 0.000 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) 0.560 (14.22) 0.255 (6.48) 1.855 (47.12) 2.110 (53.59) 1.120 (28.45) 12 4 5 fma-461and fmb-461 emi filter: screening ?standard of es bottom view case h5 0.495 max (12.57) squared corner and dot on top of case indicate pin one. 3 0.160 (4.06) 0.960 (24.38) 0.655 (16.64) 1.055 (26.80) 1.455 (36.96) 0.000 0.000 0.255 (6.48) 1.855 (47.12) 2.110 (53.59) 1.120 (28.45) 12 6 10 mhe series: screening ?standard or es bottom view case h6 345 7 8 9 0.040 dia (1.02) 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) solder seal solder tip-off 0.000 0.495 max (12.57) dot on top of case indicates pin one hr151 series and hr152 series: no screening options f igure 34: c ase h6 f igure 33: c ase h5
b8-26 case k c ases materials header case k1 - k3 cold rolled steel/nickel/gold cases k4 - k8 cold rolled steel/nickel/tin cover case k1 - k3 kovar/nickel case k4 - k8 cold rolled steel/nickel/tin pins #52 alloy (all cases) case k1, k2, and k3 (except mhv series single and dual) ceramic seal cases k4 - k8 and mhv series single and dual (k3) compression glass seal case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.2) for two decimal places unless otherwise specified case k bottom view see figures 42 - 48 for pin configuration caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300 c for 10 seconds per pin. flange thickness: cases k1, k2, k3 and mlp series (k5) 0.060 (1.52) cases k4, k5 (except mlp series), k6, k7, and k8 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) 1.125 max (28.58) 2.910 max (73.91) dot on top of case indicates pin one f igure 41: c ase k m aximum d imensions
b8-29 case k c ases 0.155 (3.94) 0.955 (24.26) 0.000 0.040 dia (1.02) 0.000 0.000 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 1.115 (28.32) 12 4 5 flanged case: designator required in case option position of model number. fm-461 emi filter: screening ?standard or es bottom view case k4 0.162 dia (4.11) 0.230 (5.84) 2.320 (58.93) solder seal solder tip-off 0.417 max (10.59) squared corner and dot on top of case indicate pin one. 3 f igure 45: c ase k4 0.155 (3.94) 0.955 (24.26) 6 10 7 8 9 0.000 0.25 0.03 (6.4 0.8) 0.040 dia (1.02) 0.155 (3.94) 0.955 (24.26) solder seal all k5 cases solder tip-off 0.417 max (10.59) 0.000 0.000 0.245 (6.22) ?0.230 (5.84) 1.845 (46.86) 2.320 (58.93) 0.230 (5.84) 2.320 (58.93) 1.115 (28.32) 12 6 10 flanged cases: designator required in case option position of model number. mtr series dual and mlp series: screening ?standard or es bottom view case k5 345 7 8 9 0.000 0.245 (6.22) 1.845 (46.86) 12 345 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.555 (14.1) 0.000 1.115 (28.32) 0.555 (14.1) squared corner and dot on top of case indicate pin one. squared corner and dot on top of case indicate pin one. mlp series mtr series dual (standard and es) f igure 46: c ase k5
b8-30 case k c ases 0.155 (3.94) 0.955 (24.26) 0.000 0.040 dia (1.02) 0.000 0.000 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 1.115 (28.32) 12 4 5 flanged cases: designator required in case option position of model number. fma-461 and fmb-461 emi filters: screening ?standard or es bottom view case k6 0.162 dia (4.11) 0.230 (5.84) 2.320 (58.93) solder seal solder tip-off 0.495 max (12.57) squared corner and dot on top of case indicate pin one. 3 f igure 47: c ase k6 0.155 (3.94) 0.955 (24.26) 0.000 0.25 0.03 (6.4 0.8) 0.040 dia (1.02) solder seal solder tip-off 0.495 max (12.57) 0.000 0.000 0.245 (6.22) ?0.230 (5.84) 1.845 (46.86) 2.320 (58.93) 1.115 (28.32) 12 6 10 flanged case: designator required in case option position of model number. mhe series: screening ?standard or es bottom view case k7 345 7 8 9 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.555 (14.1) squared corner and dot on top of case indicate pin one. f igure 48: c ase k7
c2-12 qa screening 85? products test (85? products excluding hr products) standard /es pre-cap inspection method 2017 yes yes temperature cycle (10 times) method 1010, cond. b, -55? to 125? no yes constant acceleration method 2001, 500 g no yes burn-in 96 hours at 70? ambient (typical) no yes final electrical test mil-prf-38534, group a subgroups 1 and 4: +25? case yes yes hermeticity testing fine leak, method 1014, cond. a no yes gross leak, method 1014, cond. c no yes gross leak, dip (1 x 10 -3 ) yes no final visual inspection method 2009 yes yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. mfw series mtw series mhe/mlp series mhl series mrh series mto series msr series dch series fm/fma/fmb emi filters msf emi filter 85? p roducts applies to the following products:

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