Thru-Hole DIP Switches SERIES 79B DIMENSIONS DIP Switches Linear Action, Coded Output FEATURES • Reliable Switching, Positive Detent • Codes in BCD and Hexadecimal • True Zero Output • 10 or 16 Positions • 2000 Cycle Life • Up to 60,000 Detent Operations CIRCUITRY In inches (and millimeters) All dimensions not shown here are the same as those on the facing page. 0 1 2 4 CL .100 ± .005 (2,54 ± 0,13) TYP. CL 0 1 2 3 4 5 6 7 8 9 A B C D E F 8 0 1 2 CL .240 ± .005 (6.10 ± 0,13) TYP. CL 4 BINARY CODES 16 10 8 .490 ± .005 (12,45 ± 0,13) .100 ± .005 (2,54 ± 0,13) TYP. .390 ± .005 (9,91 ± 0,13) SWITCH POSITIONS 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 4 8 0 1 2 4 8 TERMINAL LOCATIONS SEE NOTE A CL CL .100 ± .005 (2,54 ± 0,13) TYP. SEE NOTE A CL CL .100 ± .005 (2,54 ± 0,13) TYP. Dot indicates contact made between contact and output terminal. NOTE A: All terminals on this side of the switch are bussed internally. Any one of them may be used as the common terminal. SPECIFICATIONS contact temperature rise of 20°C. Electrical Ratings Make-and-break Current Rating: 2,000 cycles at 10 mA, 50 mVdc; 2,000 cycles at 125 mA, 6 Vdc; 2,000 cycles at 50 mA, 30 Vdc. Contact Resistance: 100 mohms maximum after life, measured at 10 mA dc and 50 mV (open circuit). Initial values are 60 mohms maximum for coded switches, and 50 mohms for other linear action switches. Insulation Resistance (at 100 Vdc): Between adjacent isolated contacts: Initial: 5,000 Mohms minimum; After Life: 1,000 Mohms minimum Across open contacts: Initial: 5,000 Mohms minimum; After Life: 1,000 Mohms minimum Dielectric Strength: Between adjacent isolated contacts and across open contacts. Initial: 750 Vac; After Life: 500 Vac Contact Carry Rating: 2 amps with a maximum ORDERING INFORMATION Number of Positions 10 16 Mechanical Ratings Materials and Finishes Mechanical Life: 4,000 cycles maximum. Note: a cycle is one complete operation, back and forth through all switch positions. Vibration Resistance: 10 to 2,000 Hz at 15G or 0.060" double amplitude; no damage and no contact openings exceeding 10 mS (Method 204, Test Condition B). Shock Resistance: 509, 11 mS, half sine; no damage and no openings exceeding 10 microseconds (Method 213, Test Condition A). Nonconductive Parts: Plastic UL94V-O Shorting Arm: Phosphor bronze, gold plate over nickel plate Base Contacts: Copper alloy, gold plate over nickel plate Terminals: Copper alloy, matte tin plated over nickel barrier Potting Material: Epoxy Tape Seal and Packaging Tape Seal: Polyester film Environmental Ratings Refer to MIL-STD-202F per MIL-S-83504 Operating Temperature Range: -40°C to +85°C Storage Temperature Range: -55°C to +85°C Moisture Resistance: 240 hours with temperature cycling and polarization, per MILSTD-202F, Method 305 Type of Circuit Code Number per Tube Part Number* Binary Code Decimal Hexadecimal 9 6 79B10T 79B16T *A top tape seal is required for switches that are machine soldered or heavily cleaned after hand soldering. To order top seal versions, add "S" before the "T" in the Grayhill part number. 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 DIP 16