grayhill, inc. ? 561 hillgrove avenue ? lagrange, illinois 60525-5997 ? usa ? phone: 708-354-1040 ? fax: 708-354-2820 ? www.gr ayhill.com pushbutton switches butt contact pushbutton switches series: 38bt = spst, momentary, thru hole series: 38bh = spdt, momentary, thru hole dimension a: 0 = 0.020" 4 = 0.215" 38bx-4-h-3-n seal: s = o-ring seal, n = no seal contact material: 1 = solder dip over gold 2 = solder dip over silver 3 = gold - rohs compliant 4 = silver - rohs compliant orientation: h = horizontal to pcb 123 c l c l .320 (8.13) .200 (5.08) .020 (0.51) typ. .162 (4.11) dim. "a" .180 (4.57) dia. .100 (2.54) dia. .165 (4.19) .015 (0.38) typ. .200 (5.08) .030 (0.76) typ. .130 (3.30) .025 (0.64) .125 (3.18) .030 (0.76) typ. .200 (5.08) .249 (6.32) terminal ident- ification .200 (5.08) .200 (5.08) .100 (2.54) typ. .043 (1.09) dia. typ. 38bh 38bt .249 (6,32) .200 (5,08) .030 (0,76) typ. .162 (4,11) .215 (5,46) .025 (0,64) .030 (0,76) typ. .200 (5,08) .165 (4,19) .015 (0,38) typ. .200 (5,08) .320 (8,13) .020 (0,51) typ. .200 (5,08) .200 (5,08) .043 (1,09) dia. typ. .130 (3,30) .180 (4,57) dia. .100 (2,54) dia. c l c l .125 (3,18) .125 (3,18) unless otherwise indicated, tolerances are .010 (0,25) pc mounting specifications rating criteria operating life: 80,000 make-and-break cycles at full load contact rating (resistive load): gold contacts : 0.4 va maximum at 20 vac or vdc maximum silver contacts : 1.0 amp maximum at 120 vac or 28 vdc contact resistance: below 20 milliohms typical initial at 2-4 vdc, 100 ma insulation resistance: 1000 megaohms minimum voltage breakdown: 1000 vrms minimum at sea level operating temperature: -30c. to +85c. solderability: per mil-std-202f, method 208d, or eia rs-186e method 9 (1 hour steam aging) materials and finishes base and cover: thermoplastic (ul 94v-0) plunger: thermoplastic (ul 94v-0), (s versions include an internal o-ring seal) terminals: copper alloy, gold or silver plate (as specified) over nickel plate spring: plated music wire contact system: copper alloy, gold or silver plate (as specified) over nickel plate switch support: brass, tin-plated circuitry spstCn.o. spst n.o. ordering information available from your local grayhill distributor for prices and discounts, contact a local sales office, an authorized local distributor, or grayhill. dimensions in inches (and millimeters) series 38bt and 38bh sub-miniature horizontal pc mount features ? drop-in replacement for industry standard ? sealed plunger option ? printed circuit board mount ? spst and spdt, momentary contact spst spdt pc mounting spdtCn.o. n.o. term. 3 n.c. term. 1 comm term. 2 pushbutton 6
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