Pushbutton Switches Butt Contact Pushbutton Switches SerieS 38BM and 38BC Sub-Miniature Surface Mount FeatureS Surface Mount Process Compatible Sealed Constr uction SPST and SPDT, Momentar y Contact Extended or Flush Plunger Drop-In Replacement for Industr y Standard SPeCiFiCatiOnS diMenSiOnS in inches (and millimeters) 38BM PC Mounting .320 .162 .105 (2,67) .070 (8,13) (4,11) TYP. (1,78) DIM .040 .040 .128 .143 (1,02) (1,02) (3,25) (3,63) TYP. TYP200 TYP. TYP. C L (5,08) .024 (0,61) .020 (0,51) .075 .368 .100 (2,54) .080 .080 (2,03) .030 TYP410 (10,41) (1,91) (9,35) DIA. (2,03) TYP. (0,76) MAX125 .180 (4,57) .289 .200.010 (3,18) DIA. (7,34) (5,080,25) SPSt .150 (3,81) TYP320 38BC (8.13) STANDOFF PADS .200.010 .105 .070 (5,080,25) (2,67) (1.78) .040 TYP. (1.02) .162 .100 .143 (6.63) (4,11) (2,54) .125 (3,18) .024 90 (0,61) .080 .200 .128 (3,25) (2,03) .368 (5.08) (9.35) .080 (2,03) .150 (3.81) TERMINAL ID 1 2 3 .030 (0,76) .410 (10,41) .075 .040 DIM (1.02) (1,91) MAX289 TERMINAL PADS SPdt (7,34) rating Criteria Materials and Finishes Base and Cover: Ther moplastic (UL 94V-0) Operating Life: 80,000 make-and-break cycles at full load Plunger: T h e r m o p l a s t i c ( U L 9 4 V- 0 ) , w i t h Contact rating (resistive load): standard inter nal o-r ing seal Gold Contacts : 0.4 VA maximum at 20 Vac or t erminals: Copper alloy, gold plate over nickel Vdc maximum plate Spring: Plated Music Wire Silver Contacts: I.O. Amps maximum at 120 Vac or 28 Vdc Contact System: Copper alloy, gold or silver Contact resistance: Below 20 milliohms typical plate (as specified) over nickel plate initial at 2-4 Vdc, 100 mA Switch Support: Brass, tin-plated insulation resistance: 1000 megaohms min. Voltage Breakdown: 1000 Vr ms minimum at sea level Operating t emperature: -30C to +85C Solderability: Pe r M I L - S T D - 2 0 2 F, M e t h o d 208D, or EIA RS-186E Method 9 (1 hour steam aging) Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.comPushbutton Switches Butt Contact Pushbutton Switches SerieS 38BM and 38BC Sub-Miniature Surface Mount CirCuitry taPe and reeL P aCKaGinG SWITCHES AND COVER TAPE NOT SHOWN FOR CLARITY DIRECTION OF FEED SPSt n.O. SPStn.O. 1.260.012 (32.00 0.3MM) N.C630.004 TERM. 1 COMM (16.000.1MM) 13 TERM. 2 POCKET 38BM-4-H-1-S INCH N.O. CENTER SHOWN FOR REEL TERM. 3 LINES REFERENCE SPdtn.O. ONLY OrderinG inFOrMatiOn Series: 38BM = SPST, Momentar y, Surface Mount 38BC = SPDT, Momentar y, Surface Mount dimension: 0 = 0.020 4 = 0.215 38BX-0-H-3-S Seal: S = O-Ring Seal Contact Material: 1 = Solder Dip over Gold 2 = Solder Dip over Silver 3 = Gold - RoHS Compliant 4 = Silver - RoHS Compliant Orientation: H = Hor izontal to PCB Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.com