*rohs directive 2002/95/ec jan 27 2003 including annex. specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cmf-sd series - telecom cptc resettable fuses induction rated resistance time to trip voltage rated resistance (rn) matching hold trip imax @ @ imax/ model withstand voltage @ 25 c in housing current current 230 vac 230 vac vac volts ohms tolerance ohms amps @ 25 c amps @ 25 c amps seconds cmf-sd25 600 230 25 20 % 0.5 0.130 0.260 2.8 < 0.3 cmf-sd25-10 600 230 25 10 % 0.5 0.130 0.260 2.8 < 0.3 cmf-sd35 600 230 35 20 % 0.5 0.100 0.200 3 < 0.2 CMF-SD35-10 600 230 35 10 % 0.5 0.100 0.200 3 < 0.2 cmf-sd35a 600 230 35 20 % 0.5 0.100 0.200 2.5 < 0.2 cmf-sd35a-10 600 230 35 10 % 0.5 0.100 0.200 2.5 < 0.2 cmf-sd50 600 230 50 20 % 0.5 0.090 0.190 3 < 0.1 cmf-sd50-10 600 230 50 10 % 0.5 0.090 0.190 3 < 0.1 cmf-sd50a 600 230 50 20 % 0.5 0.090 0.190 3 < 0.1 cmf-sd50a-10 600 230 50 10 % 0.5 0.090 0.190 3 < 0.1 electrical characteristics features two resistance-matched ptcs in a ceramic housing aids compliance with: - itu-t k.20/21/45 - telcordia gr-1089-core - ul 60950, 3rd ed. narrow resistance tolerance rohs compliant* applications used as a secondary overcurrent protection device in: customer premise equipment (cpe) central office (co) access equipment *rohs compliant how to order cmf - sd 35 a -10 - 2 product designator style sd = surface mount dual pkg. rated resistance (rn) 25, 35, 50 (25, 35, 50 ohms) reduced footprint and height option* resistance tolerance option blank = standard (20 %) -10 = 10 % packaging options - 2 = tape & reel *reduced footprint and height option currently unavailable for model cmf-sd25. typical part marking represents total content. layout may vary. 356g manufacturer's trademark part identification: 25 = cmf-sd25 35 = cmf-sd35 50 = cmf-sd50 35a = cmf-sd35a 50a = cmf-sd50a 25k = cmf-sd25-10 35k = CMF-SD35-10 50k = cmf-sd50-10 35ak = cmf-sd35a-10 50ak = cmf-sd50a-10 year code: 6 = 2006 bi-weekly date code: week 13-14 = g primary test protection test condition requirements mains power contact - itu-t k.20, k.21 ....none................230 v rms, 10 ohms, 15 min. ...................................... ................(ri-rf) / ri < ?0 % power induction - itu-t k.20, k.21..............none................600v rms, 600 ohms, 0.2 seconds, 10 cycles, every 1 min. ... ...(ri-rf) / ri < ?0 % power induction - itu-t k.20, k.21..............gdt ................600 v rms, 600 ohms, 1 second, 10 cycles, every 1 min. ...... ....(ri-rf) / ri < ?0 % power induction - itu-t k.20, k.21..............gdt ................600 v rms, 200 ohms, 1 second, 10 cycles, every 1 min. ...... ....(ri-rf) / ri < ?0 % lightning surge - itu-t k.20, k.21 ......................................10/700 s, 25 ohms, 1.0 kv, 10 tests, every 1 min. ..................(ri-rf) / ri < ?0 % lightning surge......................................................................10/1000 s, 40 ohms, 1.0 kv, 30 tests, every 3 min. ................(ri-rf) / ri < ?0 % ri = r initial rf = r final test procedures and requirements for model cmf-sd series
solder reflow recommendations 160?20 300 250 200 150 100 50 0 10?0 temperature ( c) 120 preheating soldering cooling time (seconds) solder reflow recommended reflow methods: ir, vapor phase oven, hot air oven. devices are not designed to be wave soldered to the bottom side of the board. gluing the devices is not recommended. recommended maximum paste thickness is 0.25 mm (.010 inch). devices can be cleaned using standard industry methods and solvents. note: if reflow temperatures exceed the recommended profile, devices may not meet the performance requirements. rework a device should not be reworked. specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cmf-sd series - telecom cptc resettable fuses asia-pacific: tel: +886-2 2562-4117 fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 fax: +1-951 781-5700 www.bourns.com cmf-sd series, rev. l, 08/15/08 product dimensions recommended pad layout coplanarity: 0.15 (.006) (reduced value available on request.) packaging options - tape and reel: cmf-sd25, cmf-sd35 & cmf-sd50 = 400 pcs. per reel; cmf-sd35a & cmf-sd50a = 500 pcs. per reel mm (inches) dimensions = a b f h g e d c b 1 2 3 4 a f e d c h g cmf-sd25 cmf-sd35 cmf-sd35a dim. cmf-sd50 cmf-sd50a a b c d e f g h 9.00 (.354) max. 10.80 (.425) max. 10.20 (.402) max. 4.88 - 5.28 (.192 - .208) 2.41 - 2.61 (.095 - .103) 7.15 (.281) max. 8.50 (.335) max. 8.10 (.319) max. 3.25 - 3.65 (.128 - .144) 2.41 - 2.61 (.095 - .103) 0.5 (.020) cmf-sd25 cmf-sd35 cmf-sd35a dim. cmf-sd50 cmf-sd50a a b c d e f g h 10.0 (.394) 8.80 (.346) 3.20 (.126) 2.00 (.079) 2.60 (.102) 8.00 (.315) 7.05 (.278) 2.75 (.108) 2.00 (.079) 2.51 (.099) 5.00 (.197) 7.60 (.299) 3.45 (.136) 5.95 (.234) 10.0 (.394) 8.15 (.321) 1 2 3 4 max. 0.5 (.020) max. 2.5 (.098) 2.5 (.098) 1.0 (.039) 1.0 (.039)
cmf-sd25-2 cmf-sd35-2 cmf-sd35a-2 tape dimensions per eia 481-2 cmf-sd50-2 cmf-sd50a-2 w p 0 p 1 p 2 a 0 b 0 d 0 f e 1 t max. 1 k 0 specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cmf-sd series tape and reel specifications dimensions = mm (inches) 24.0 +0.30/-0.10 (0.945 +0.012/-0.004 ) 4.00 0.10 (0.157 0.004) 16.0 0.10 (0.630 0.004) 2.00 0.10 (0.079 0.004) 10.2 0.10 (0.402 0.004) 9.0 0.10 (0.354 0.004) 1.75 0.10 (0.069 0.004) 11.0 0.10 (0.433 0.004) 11.5 0.10 (0.453 + 0.004) 1.5 +0.10/-0.0 (0.059 +0.004/-0.0) t k 5 93 0 a 0 p p a 0 b 0 f p 2 p 0 e w b 0 f e w p 2 p 0 2.5 (.098) 0.5 (.020) 13.2 +0.2/-0 (.520 +.008/-0 16.4 +2.0/-0 (.646 +.079/-0) 16.4 +2.0/-0 (.646 +.079/-0) 22.4 (.882) max. 22.4 (.882) max. 330 -2/+0 (12.99 -.079/+0) dia. 100 1.5 (3.94 .059) dia. 13.2 +0.2/-0 (.520 +.008/-0 330 -2/+0 (12.99 -.079/+0) dia. 100 1.5 (3.94 .059) dia. d d t k 0 1.0 (.039) 5.8 (.228) 3.45 (.136) 0.50 (0.020) 24.0 0.20 (0.945 0.008) 4.00 0.10 (0.157 0.004) 12.0 0.10 (0.472 0.004) 2.00 0.10 (0.079 0.004) 7.30 0.10 (0.287 0.004) 8.30 0.10 (0.327 0.004) 1.75 0.10 (0.069 0.004) 8.80 0.10 (0.346 0.004) 11.5 0.10 (0.453 + 0.004) 1.5 0.10 (0.059 0.004) 0.50 0.005 (0.020 0.002) cmf-sd25-2 cmf-sd35-2 cmf-sd50-2 cmf-sd35a-2 cmf-sd50a-2
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