Pushbutton Switches Butt Contact Pushbutton Switches SerieS 38Bt and 38BH Sub-Miniature Horizontal PC Mount FeatureS Drop-In Replacement for Industr y Standard Sealed Plunger Option Pr inted Circuit Board Mount SPST and SPDT, Momentar y Contact diMenSiOnS in inches (and millimeters) 38Bt .125 .215 .162 C .320 (8,13) L (3,18) (5,46) (4,11) PC Mounting .025 .043 (1,09) .249 .200 (0,64) C .130 DIA. TYP. (6,32) L (5,08) (3,30) .100 (2,54) .200 .125 DIA. (5,08) (3,18) .180 (4,57) .030 .165 (4,19) .030 (0,76) TYP. .020 .200 DIA. (0,76) (0,51) .200 .015 (0,38) TYP. (5,08) TYP. .200 (5,08) TYP. (5,08) SPSt 38BH .320 PC Mounting C DIM. L .162 (8.13) .025 (4.11) (0.64) .043 (1.09) DIA. TYP. .100 .200 .249 (2.54) C .130 L (5.08) (6.32) TYP. (3.30) 1 2 3 .180 .125 TERMINAL .100 .030 (4.57) (3.18) IDENT- (2.54) .030 (0.76) DIA. .020 DIA. IFICATION (0.76) .165 TYP. .200 .200 (0.51) TYP. (4.19) (5.08) (5.08) TYP. .200 .200 (5.08) .015 (5.08) SPdt (0.38) TYP. Unless otherwise indicated, tolerances are .010 (0,25) SPeCiFiCatiOnS rating Criteria Materials and Finishes Base and Cover: Ther moplastic (UL 94V-0) Operating Life: 80,000 make-and-break cycles insulation resistance: 1 0 0 0 m e g a o h m s at full load min. Plunger: Ther moplastic (UL 94V-0), (S versions Contact rating (resistive load): Voltage Breakdown: 1000 Vr ms minimum at include an inter nal o-r ing seal) t erminals: Copper alloy, gold or silver plate (as Gold Contacts: 0.4 VA maximum at 20 Vac or sea level Vdc maximum Operating t emperature: -30C. to +85C. specified) over nickel plate Spring: Plated Music Wire Silver Contacts : 1.0 Amp maximum at 120 Vac Solderability: Pe r M I L - S T D - 2 0 2 F, M e t h o d or 28 Vdc 208D, or EIA RS-186E Method 9 (1 hour steam Contact System: Copper alloy, gold or silver Contact resistance: Below 20 milliohms typical aging) plate (as specified) over nickel plate Switch Support: Brass, tin-plated initial at 2-4 Vdc, 100 mA CirCuitry OrderinG inFOrMatiOn Series: 38BT = SPST, Momentar y, Thr u Hole Series: 38BH = SPDT, Momentar y, Thr u Hole SPStn.O. dimension a: 0 = 0.020 4 = 0.215 38BX-4-H-3-n SPSt n.O. Seal: S = O-Ring Seal, N = No Seal Contact Material: 1 = Solder Dip over Gold N.C. 2 = Solder Dip over Silver TERM. 1 COMM 3 = Gold - RoHS Compliant TERM. 2 N.O. 4 = Silver - RoHS Compliant TERM. 3 Orientation: H = Hor izontal to PCB SPdtn.O. Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.com