145 switches stsm ?ultraminiature tactile switch features available sharp click feel with a positive tactile feedback ultraminiature and lightweight structure suitable for high density mounting economical reliable rohs compliant ? electrical characteristics electrical life ...............50,000 cycles for 160 gf, 320 gf rating ..................................50 ma, 12 vdc contact resistance ................100 m ? max. insulation resistance ...........................100 m ? min. @ 500 vdc dielectric strength...........250 vac/1 minute contact arrangement ..........................spst environmental characteristics operation temperature range ........................................-25 ? to +70 ? storage temperature range ........................................-30 ? to +80 ? vibration test ...................mil-std-202f method 201a frequency................10-55-10hz/1 minute directions ...........x,y,z, three mutually perpendicular directions time..........................2 hours each direction shock test ...................mil-std-202f method 213b condition a gravity ...........50 g (peak value), 11 msec direction and times ...6 sides and 3 times in each direction physical characteristics cover materials ...................stainless steel base materials...............ul 94v-0 nylon or ppa high-temperature thermoplastic actuator .............................ul 94v-0 nylon high-temperature thermoplastic contact disc ........................stainless steel with silver cladding terminals ............brass with silver cladding product dimensions 6.0 (.236) 3.5 (.138) 7.4 (.291) 3.4 (.134) 7.2 (.283) 3.0 (.118) 1.5 (.059) 1.0 (.039) 3.5 (.138) 0.9 (.035) 0.5 (.020) max. 0.05 (0.002) max. pcb layout h 0.2 (h .008) 1.6 (.063) how to order sts m - 3 1 - s tr model style m = surface mount product size -3 = 3.5 mm wide x 6 mm long height 1 = 4.3 mm 2 = 5.0 mm color of stem for operating force -n = brown, 160 g -s = salmon, 320 g packaging option __ = standard packaging 135 pcs./tube tr = tape & reel packaging 31 ?1800 pcs./reel 32 ?1600 pcs./reel circuit diagram t1 t2 reflow soldering profile temperature ( c) time (seconds) 275 30-40 sec. 120 c 225 175 125 75 25 0 20 40 60 80 100 120 140 160 180 200 80-90 sec. 10-15 sec. 35-60 sec. 180 c 240 c dimensions: mm/(inches) tolerances: .2/(.008) except where noted specifications are subject to change without notice. ? rohs directive 2002/95/ec jan 27 2003 including annex. customers should verify actual device performance in their specific applications. rev 09/04
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