1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 2 3 4 4 DIP Switches Surface Mount DIP Switches SERIES 78H FEATURES SPDT and DPST • Compatible with SMT Assembly Including Infrared Reflow and Vapor-Phase • Reliable Spring and Ball Contact DIMENSIONS In inches (and millimeters) SPDT, DPST, Top Actuated, Slide Operated Recommended PC Pad Dimensions LENGTH ± .010 (0,25) .380 ± .010 SEE ORDER INFO (9,65 ± 0,25) .025  .055 ± .010 (5,84)  .530 .280 (7,11) (1,40 ± 0,25) REF. .268 ± .010 (13,46) TYP. .025 (0,64) R. (6,81 ± 0,25) TYP. .303 ± .015 .100 ± .005 .295 + .000 – .020 .070 (1,78) TYP. (7,70 ± 0,38) C (2,54 ± 0,13) TYP. .012 ± .001 C (7,49 – 0,51) L .100 (2,54) TYP. L .424 ± .015 (0,30 ± 0,03) CC (10,77 ± 0,38) TYP. L L TYP. CIRCUITRY with all actuators in the closed (on) position as SPDT 2 Circuits (no common) DPST shipped. 1 1 11 ON ON Materials and Finishes Dot indicates  active circuit. Shorting Member: Brass, gold-plated over nickel barrier. OFF ON Base Contacts: Copper alloy, gold-plated over nickel barrier. SPECIFICATIONS Mechanical Shock: Per Method 213, Test Terminals: Copper alloy, matte tin-plated over Condition A. 1 mS opening (10 mS allowed) nickel barrier. Electrical Ratings Terminal Strength: Per specification Non-Conductive Parts: Cover is natural color Make-and-break Current Rating: 2,000 Thermal Aging: 1,000 hours at 85°C; no thermoplastic, actuators are white thermoplastic operations per switch position at 1 mA, 5 Vdc; failures (UL94V-O) 50 mA, 30 Vdc; or 150 mA, 30 Vdc Thermal Shock: Per specification; no failures; Contact Resistance: Initial: 30 mohms max. TAPE AND REEL PACKAGING passes contact resistance After Life: 100 mohms max. (10 mA at 50 Vdc, Meets requirements of EIA 481-2 or open circuit) Insulation Resistance: Minimum, at 100 Vdc Environmental Ratings EIA 481-3 Meets all requirements of MIL- S-83504**. Where between adjacent closed contacts and also 13 INCH  across open switch contacts. Initial: 2,000 Grayhill performance is superior, the MIL spec is DIAMETER REEL Mohms; After Life: 1,000 Mohms listed in parentheses. Operating Temperature Range: -40°C to + Dielectric Strength: Minimum voltage (AC, RMS) CONDUCTIVE  PLASTIC EMBOSSED  measured between adjacent closed contacts 85°C TAPE Storage Temperature Range: -55°C to + 85°C and also across open switch contacts. Initial: 750 volts; After Life: 500 volts Moisture Resistance: Per MIL-STD-202, Method Current Carry Rating: 4 amps, maximum rise 106 DIRECTION  of 20°C OF FEED Switch Capacitance: 2 pF at 1megahertz Soldering Information 16 & 24mm  16mm TAPE Solderability: Per MIL-STD-202, Method 208 Soldering Heat Resistance: Per MIL-S-83504, Mechanical Ratings 1 1 1  Mechanical Life: 2,000 operations per switch six second test Recommended Processing Temperature: position 1 1 1 Vibration Resistance: Per method 204, Test 220°C–230°C (1 pass—260°C maximum) 2 2 2 Condition B. 1 mS opening (10 mS allowed) Processing Position: Switch is to be processed 3 3 3 4 4 4 ORDERING INFORMATION: Tube Packaging No. of Length Length Carrier Width Part Number* 16mm 32 & 44mm  Positions (inches) (metric) Dim. A SPDT DPST TAPE PIN ONE LOCATION 1 0.280" 7,1 mm 24 mm 78HJ01GWT 78HF01GWT COVER TAPE 2 0.480" 12,2 mm 24 mm 78HJ02GWT 78HF02GWT DIM. A (SEE ORDER INFO.) 3 0.680" 17,3 mm 32 mm 78HJ03GWT 78HF03GWT 4 0.880" 22,4 mm 44 mm 78HJ04GWT 78HF04GWT Each reel has a 15.750 inch (390 mm) * Insert "R" before the "T" in the Grayhill part number for tape and reel packaging (500 switches/reel). minimum leader and a 6.30 inch (160 mm) ** Note: 100% matte tin terminal plating does not meet MIL-S-83504 for lead content. minimum trailer. Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill. Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com