features compliant with aec-q200 rev-c stress test quali cation for passive components in automotive applications operating temperature range up to 125 ? low thermal derating factor higher hold currents at elevated temperature choice of operating currents rohs compliant* mf-smht series - ptc resettable fuses *rohs directive 2002/95/ec jan. 27, 2003 including annex and rohs recast 2011/65/eu june 8, 2011. speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. environmental characteristics operating temperature ......................................... -40 ? to +125 ? storage temperature ............................................ -40 ? to +85 ? passive aging ....................................................... +125 ?, 1000 hours ...................................... ....... ?5 % typical resistance change humidity aging...................................................... +85 ?, 85 % r.h. 7 days .................................. ... ?5 % typical resistance change thermal shock ..................................................... mil-std-202f, method 107g, .............................. ?5 % typical resistance change +125 ? to -55 ?,10 cycles vibration ............................................................... mil-std-883c, method 2007.1, condition a ....... no cha nge electrical characteristics model v max. volts i max. amps i hold i trip resistance max. time to trip tripped power dissipation amperes at 23 ? ohms at 23 ? amperes at 23 ? seconds at 23 ? watts at 23 ? hold trip r min. r 1max. typ. mf-smht136 16 100 1.36 2.72 0.085 0.33 8.0 10.0 2.1 mf-smht160 16 100 1.60 3.20 0.050 0.15 8.0 10.0 2.1 test procedures and requirements for model mf-smht series test test conditions accept/reject criteria visual/mech. ......................................................... verify dimensions and materials ......................... .. per mf physical description resistance ............................................................ in still air @ 23 ? ................................... .............. rmin r r1max time to trip ........................................................... at speci ed current, vmax, 23 ? ..................... .... t max. time to trip (seconds) hold current ......................................................... 30 min. at ihold ........................................ ............. no trip trip cycle life ....................................................... vmax, imax, 100 cycles ................................. ....... no arcing or burning trip endurance ..................................................... vmax, 48 hours ..................................................... no arcing or burning solderability .......................................................... mil-std-202f, method 208f ............................. .. 95 % min. coverage thermal derating chart - i hold /i trip (amps) model ambient operating temperature -40 ? -20 ? 0 ? 23 ? 40 ? 50 ? 60 ? 70 ? 85 ? 125 ? mf-smht136 1.91 / 3.82 1.72 / 3.44 1.54 / 3.08 1.36 / 2.72 1.18 / 2.36 1.09 / 2.18 1.00 / 2.00 0.91 / 1.82 0.77 / 1.54 0.40 / 0.80 mf-smht160 2.15 / 4.30 1.96 / 3.92 1.78 / 3.56 1.60 / 3.20 1.42 / 2.48 1.33 / 2.66 1.24 / 2.48 1.15 / 3.30 1.02 / 2.04 0.64 / 1.28 4a 136 4a 136 asia-paci c: 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 *rohs compliant & aec approved
speci? cations are subject to change without notice. customers should verify actual device performance in their speci? c applications. mf-smht series - ptc resettable fuses product dimensions dimensions: mm (inches) model abcd e f gh min. max. max. max. min. max. min. max min. max. min. max. min. mf-smht136 6.73 (0.265) 7.98 (0.314) 3.00 (0.118) 5.44 (0.214) 0.56 (0.022) 0.71 (0.028) 0.56 (0.022) 0.71 (0.028) 2.16 (0.085) 2.41 (0.095) 0.66 (0.026) 1.37 (0.054) 0.43 (0.017) mf-smht160 8.00 (0.315) 9.50 (0.374) 3.00 (0.118) 6.71 (0.264) 0.56 (0.022) 0.71 (0.028) 0.56 (0.022) 0.71 (0.028) 3.68 (0.145) 3.94 (0.155) 0.66 (0.026) 1.37 (0.054) 0.43 (0.017) packaging: tape & reel: mf-smht136 = 2000 pcs. per reel; mf-smht160 = 1500 pcs. per reel. a d h e side view b f c end view g terminal material: tin-plated brass 2.3 0.1 (0.09 0.004) 9.7 0.1 (0.38 0.004) 3.1 0.1 (0.12 0.004) 3.1 0.1 (0.12 0.004) recommended pad layout mf-smht136 10.7 0.1 (0.42 0.004) 4.6 0.1 (0.18 0.004) 2.3 0.1 (0.09 0.004) 4.6 0.1 (0.18 0.004) recommended pad layout mf-smht160 how to order mf - smht 136 - 2 multifuse product designator series smht = surface mount component hold current, ihold 136 - 160 (1.36 - 1.60 amps) packaging options - 2 = tape and reel* *packaged per eia-481-2 typical part marking represents total content. layout may vary. manufacturer's trademark part identification 136 4a date code - week 1 of 2004 = 4a (year & week) week 27 of 2004 = a4 (week & year) applications protection of automotive circuitry including engine control modules overcurrent surge protection of electronic equipment required to operate at high operating temperature ranges resettable fault protection of general electronic equipment
speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. mf-smht series - ptc resettable fuses mf-smht series, rev. f, 02/12 typical time to trip at 23 ?c the time to trip curves represent typical performance of a device in a simulated application environment. actual performance in speci c customer app lications may differ from these values due to the in uence of other variables. solder re ow recommendations solder re ow recommended re ow 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 re ow temperatures exceed the recommended pro le, devices may not meet the performance requirements. rework ? a device should not be reworked. 0.01 0.1 0.001 1 10 100 1 10 fault current (amps) time to trip (seconds) mf-smht136 mf-smht160 160?20 300 250 200 150 100 50 0 10?0 temperature ( c) 120 preheating soldering cooling time (seconds)
mf-smht136 mf-smht160 tape dimensions per eia-481-2 per eia 481-2 w 16.0 0.3 16.0 0.3 (0.630 0.012) (0.630 0.012) p 0 4.0 0.1 4.0 0.1 (0.157 0.004) (0.157 0.004) p 1 8.0 0.1 12.0 0.1 (0.315 0.004) (0.472 0.004) p 2 2.0 0.1 2.0 0.1 (0.079 0.004) (0.079 0.004) a 0 5.7 0.1 6.9 0.1 (0.224 0.004) (0.272 0.004) b 0 8.1 0.1 9.6 0.1 (0.319 0.004) (0.378 0.004) b 1 max. 12.1 12.1 (0.476) (0.476) d 0 1.5 + 0.1/-0.0 1.5 + 0.1/-0.0 (0.059 + 0.004/-0) (0.059 + 0.004/-0) f 7.5 0.1 7.5 0.1 (0.295 + 0.004) (0.295 + 0.004) e 1 1.75 0.1 1.75 0.1 (0.069 0.004) (0.069 0.004) e 2 min. 14.25 14.25 (0.561) (0.561) t max. 0.6 0.6 (0.024) (0.024) t 1 max. 0.1 0.1 (0.004) (0.004) k 0 3.4 0.1 3.4 0.1 (0.134 0.004) (0.134 0.004) leader min. 390 390 (15.35) (15.35) trailer min. 160 160 (6.30) (6.30) reel dimensions a max. 360 360 (14.17) (14.17) n min. 50 50 (1.97) (1.97) w 1 16.4 + 2.0/ -0.0 16.4 + 2.0/ -0.0 (0.646 + 0.079/-0) (0.646 + 0.079/-0) w 2 max. 22.4 22.4 (0.882) (0.882) mf-smht series tape and reel speci cations speci cations are subject to change without notice. customers should verify actual device performance in their speci c applications. dimensions: mm (inches) b 1 n(hub dia.) (measured at hub) a t cover tape k 0 t 1 a 0 w 2 (measured at hub) w 1 p 1 b 0 f d 0 p 2 p 0 e 2 e 1 w note: effective december 1, 2010 (product date code v0), the cover tape will be changed to the new 3m ? universal cover tape (uct).
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