Butt Contact Pushbutton Switches sERIES 38BT and 38bc Sub-Miniature Vertical PC Mount Features •Actuates at Right Angle to Printed Circuit Board •Drop-In Replacement for Industry Standard •SPST and SPDT, Momentary Contact •Sealed Plunger Option DIMENSIONS in inches (and millimeters) 38BT .200 (5,08) Dim. A .320 (8,13) .100(2,54) DIA. .177 .180(4,57) (4,50) DIA. SPST .020(0,51) SQUARE .130(3,30)TYP. .527(13,39) 38BC .527(13,39) .200 .100 (2,54) DIA. .190 (4,83) DIA. SPDT .200 (5,08) .320 (8,13) .177 (4,50) 1 DIM"A" .180 (4,57) DIA. .130 (3,30) TYP. .100 (2,54) TYP. .020(0,51) SQ.TYP. Unless otherwise indicated, tolerances are ± .010 (0,25) SPECIFICATIONS Electrical Ratings Materials and Finishes 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 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, for both silver and gold-plated contacts Insulation Resistance: 1000 megaohms minimum Voltage Breakdown: 1000 Vrms minimum at sea level Operating Temperature: -30°C. to +85°C. Solderability: Per MIL-STD-202F, Method 208D, or EIA RS-186E, Method 9 (1 hour steam aging) CIRCUITRY ORDERING INFORMATION SPST–N.O. SPSt n.O. N.C. TERM.1 COMM TERM.2 N.O. TERM.3 SPDT–N.O. Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 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 38BT-4-V-3-S Series: 38BT = SPST, Momentary, Thru-Hole Series: 38BC = SPDT, Momentary, Thru-Hole Dimension A: 0 = 0.020" 4 = 0.215" 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: V = Vertical to PCB 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com Pushbutton Switches .200 (5,08) .190(4,83) DIA.