Butt Contact Pushbutton Switches SERIES 39 SPST and SPDT, 1/4 Amp FEATURES • Fully Protected During Flux Cleaning Operations DIMENSIONS In Inches (and millimeters) SPDT–PC Mount Large Button Style .500 ± .015 (12,7 ± 0,38) 39-261* .187 ± .010 (4,75 ± 0,25) DIA. .328 ± .015 (8,33 ± 0,38) Rating at 28 Vdc Resistive Rating at 115 Vac Resistive 1 150 mA .270 (6,86) REF. /4 Amp Rating at 220 Vac Resistive 1 /8 Amp Total Travel Action Operations at Rated Load 500,000 Partial Part Number 39-251* 39-261* Actuating Force (oz.) .090 + .010/ – .015 (2,29 + 0,25/ – 0,38) Momentary .100 ± .010 (2,54 ± 0,25) Pushbutton Switches .125 ± .010 (3,18 ± 0,25) .068 ± .010 (1,73 ± 0,25) 10 ± 3 oz. .030 ± .002 (0,76 ± 0,05) DIA. .250 ± .015 (6,35 ± 0,38) .250 ± .010 (6,35 ± 0,25) DIA. Small Button Style .060 (1,52) REF. .084 ± .005 (2,13 ± 0,13) DIA. .050 ± .005 (1,27 ± 0,13) 39-251* .100 ± .015 (2,54 ± 0,38) END OF BUTTON HAS A .200 (5,08) SPHERICAL RADIUS .250 ± .010 (6,35 ± 0,25) DIA. .400 ± .015 (10,16 ± 0,38) E .100 ± .010 (2,54 ± 0,25) .050 ± .005 (1,27 ± 0,13) TYP. .100 ± .010 (2,54 ± 0,25) CL .300 ± .010 (7,62 ± 0,25) .100 ± .005 (2,54 ± 0,13) N.C. N.O. XXXX .060 (1,52) REF. .100 ± .015 (2,54 ± 0,38) .050 ± .005 (1,27 ± 0,13) .400 ± .015 (10,16 ± 0,38) .340 ± .015 (8,64 ± 0,38) .050 ± .005 (1,27 ± 0,13) TYP. GRAYHILL .090 ± .010 (2,29 C L ± 0,25) .340 ± .015 (8,64 ± 0,38) .200 ± .015 (5,08 ± 0,38) .084 ± .005 (2,13 ± 0,13) DIA. .090 ± .010 (2,29 C ± 0,25) L .100 ± .010 (2,54 ± 0,25) CL .300 ± .010 (7,62 ± 0,25) .100 ± .010 (2,54 ± 0,25) E.I.A. DATE CODE SPECIFICATIONS CIRCUITRY Rating Criteria 2 Circuits Per Switch N.C. Actuator N.C. SPST N.C. SPST N.O. N.O. N.O. Contact Resistance: 25 milliohms maximum on a new switch Voltage Breakdown: 1,000 Vac between mutually insulated parts Insulation Resistance: 1,000 megohms minimum Operating Temperature: -40°C to +125°C Materials and Finishes Alternate Wiring Actuator N.C. SPDT BREAK BEFORE C MAKE CONNECT PINS ON PC BOARD N.O. Button: Nylon Base and Cover: Polyester, red in color Shorting Bar: Phosphor bronze, gold-plated over nickel Terminals: Brass, gold-plated over nickel Spring: Tinned music wire O-Ring: Fluorosilicone Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois ORDERING INFORMATION *Complete Part Number 39-251 39-251 39-261 39-261 RED BLK RED BLK Description Small Red Button, SPDT Small Black Button, SPDT Large Red Button, SPDT Large Black Button, SPDT Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill. 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com Pushbutton 37