*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-rq series - telecom cptc resettable fuses time induction rated resistance to trip voltage rated resistance matching hold hold trip imax @ @ imax/ model withstand voltage (rn) in housing current current current 230 vac 230 vac amps amps amps vac volts ohms tolerance ohms @ 25 c @ 40 c @ 25 c amps seconds cmf-rq50 600 230 50 20 % 0.5 0.09 0.06 0.19 3.0 < 0.1 cmf-rq50-10 600 230 50 10 % 0.5 0.09 0.06 0.19 3.0 < 0.1 electrical characteristics features four 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 product dimensions packaging options: bulk: 56 pcs. per plastic box mm (inches) dimensions = 20.0 1.0 (.787 .039) 9.0 1.0 (.354 .039) 9.0 1.0 (.354 .039) side front bottom 1.2 (.047) 0.6 (.236) 1 3 5 7 = front pins 2 4 6 8 = back pins pins 1 & 2 = 1st cptc pins 3 & 4 = 2nd cptc pins 5 & 6 = 3rd cptc pins 7 & 8 = 4th cptc 5.0 0.2 (.197 .008) 10.0 1.0 (.394 .039) 1.5 (.059) 2.0 (.079) 5.0 0.2 (.197 .008) 2.5 0.1 (.098 .039) 1234 5678 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 < 10 % power induction - itu-t k.20, k.21..............none................600v rms, 600 ohms, 0.2 seconds, 10 cycles, every 1 min. ... ...(ri-rf) / ri < 10 % power induction - itu-t k.20, k.21..............gdt ................600 v rms, 600 ohms, 1 second, 10 cycles, every 1 min. ...... ....(ri-rf) / ri < 10 % power induction - itu-t k.20, k.21..............gdt ................600 v rms, 200 ohms, 1 second, 10 cycles, every 1 min. ...... ....(ri-rf) / ri < 10 % lightning surge - itu-t k.20, k.21 ......................................10/700 s, 25 ohms, 1.0 kv, 10 tests, every 1 min. ..................(ri-rf) / ri < 10 % lightning surge......................................................................10/1000 s, 40 ohms, 1.0 kv, 30 tests, every 3 min. ................(ri-rf) / ri < 10 % overvoltage withstand ..........................................................300 v, 3 a, 4 hours, 1 time ..................... ...................................(ri-rf) / ri < 10 % failure mode ..........................................................................300 v, rl=0, 60 min. ..................... .............................................** ri = r initial rf = r final ** circuit disconnected or high resistance is acceptable. test procedures and requirements for model cmf-rq series
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 reliable electronic solutions cmf-rq series, rev. b, 11/07 copyright' 2007, bourns, inc. litho in u.s.a., mf0725 08/07 how to order cmf - rq 50 - 10 - 0 product designator style rq = radial quad package rated resistance (rn) 50 (50 ohms) rated resistance tolerance -10 = 10 % blank = 20 % (standard) packaging options - 0 = bulk packaging typical part marking represents total content. layout may vary. c450m7g manufacturer's trademark quad ceramic case part identification: 50m = cmf-rq50 50k = cmf-rq50-10 year code: 7 = 2007 bi-weekly date code: week 13-14 = g cmf-rq series - telecom cptc resettable fuses specifications are subject to change without notice. customers should verify actual device performance in their specific applications.
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