Pushbutton Switches Butt Contact Pushbutton Switches SerieS 38Bt and 38BC Sub-Miniature Vertical PC Mount FeatureS Actuates at Right Angle to Pr inted Circuit Board Drop-In Replacement for Industr y Standard SPST and SPDT, Momentar y Contact Sealed Plunger Option diMenSiOnS in inches (and millimeters) .200 38Bt (5,08) Dim. A .190 (4,83) .200 .320 DIA. (5,08) (8,13) .100 (2,54) DIA. .177 .020 (0,51) (4,50) .180 (4,57) SQUARE SPSt DIA. .130 (3,30) TYP. .527 (13,39) 38BC DIM .527(13,39) .320 .200 .180 .177 (5,08) (8,13) (4,57) (4,50) DIA. .200 .100 .190 (2,54) .130 (4,83) DIA. .020 (0,51) DIA. (3,30) SPdt .100 SQ. TYP. TYP. (2,54) TYP. Unless otherwise indicated, tolerances are .010 (0,25) SPeCiFiCatiOnS electrical ratings Materials and Finishes Operating Life: 80,000 make-and-break Base and Cover: Ther moplastic (UL 94V-0) insulation resistance: 1000 megaohms cycles at full load Plunger: Ther moplastic (UL 94V-0), (S minimum Contact rating (resistive load): versions include an inter nal o-r ing seal) Voltage Breakdown: 1000 Vr ms minimum at Gold Contacts: 0.4 VA maximum at 20 Vac or t erminals: Copper alloy, gold or silver plate sea level Vdc (as specified) over nickel plate Operating t emperature: -30C. to +85C. Silver Contacts: 1.0 Amp maximum at 120 Spring: Plated music wire Solderability: Per MIL-STD-202F, Method Vac or 28 Vdc Contact System: Copper alloy, gold or silver 208D, or EIA RS-186E, Method 9 (1 hour Contact resistance: Below 20 milliohms plate (as specified) over nickel plate steam aging) typical initial at 2-4 Vdc, 100 mA, for both silver and gold-plated contacts CirCuitry OrderinG inFOrMatiOn Series: 38BT = SPST, Momentar y, Thr u-Hole Series: 38BC = SPDT, Momentar y, Thr u-Hole SPStn.O. dimension a: 0 = 0.020 4 = 0.215 38Bt -4-V-3-S 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: V = Ver tical 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 1