Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Thru-Hole DIP Switches
DIP Switches
Ratings 76 78 90B
Mechanical Life: Operations per switch position 2,000 2,000 2,000
Make-and-break Current Rating: Operations
per switch position at these resistive loads
1 mA, 5 Vdc; 50 mA, 30 Vdc; or 150 mA, 30 Vdc: 2,000 2,000 —
10 mA, 30 Vdc; or 10 mA, 50 mVdc: — — 2,000
10 mA, 50 mVdc; or 25 mA, 24 Vdc; or 100 mA, 6 Vdc: — — 2,000
Contact Resistance: Initially: ≤ 30 mΩ ≤ 30 mΩ ≤ 20 mΩ
After life, at 10 mA, 50 mVdc, open circuit: ≤ 100 mΩ ≤ 100 mΩ ≤ 100 mΩ
Insulation Resistance:
Minimum, at 100 Vdc between adjacent closed
contacts and also across open switch contacts
Initially (Mohms): 5,000 5,000 5,000
After life (Mohms): 1,000 1,000 1,000
Dielectric Strength: Minimum voltage (AC,
RMS) measured between adjacent closed
contacts and also across open switch contacts.
Initially: 750 V 750 V 500 V
After life: 500 V 500 V 500 V
Current Carry Rating: Maximum rise of 20°C 5 A 4 A 3 A
Switch Capacitance: At 1 megahertz 2 pF 2 pF 2 pF
Operating Temperature Range: -40°C to + 85°C -40°C to + 85°C -40°C to + 85°C
Storage Temperature Range: -55°C to + 85°C -55°C to + 85°C -55°C to + 85°C
SPECIFICATIONS: Standard Styles
Mechanical Ratings
Vibration Resistance: Per Method 204, Test
Condition B, 1 mS opening (10 mS allowed)
Mechanical Shock: Per Method 213, Test
Condition A. 1 mS opening (10 mS allowed)
Thermal Shock Resistance: Per specication;
no failures; passes contact resistance.
Terminal Strength: Per specication
Thermal Aging: 1,000 hours at 85°C; no failures.
Environmental Ratings
Meets all requirements of MIL- S-83504. Where
Grayhill performance is superior, the MIL spec
is listed in parentheses.
Moisture Resistance: Per specification,
Method 106.
Soldering Information
Series 90 MIDIP
®
and Series 76 recessed rocker
(76RSB style) sealed switches have been tested
to EIA Standard RS-448-2. Similar performance
can be expected from other sealed Series 76
and 78 DIP switches.
Solderability: Per MIL-STD-202, Method 208
Resistance to Soldering Heat: 76RSB:
Passes EIA Standard using two, four, and six
second soldering time. 90: Per MIL-S-83504,
six second test.
Fluxing: Per EIA RS-448-2 with ux touching
switch body.
Cleaning: 76, 78 and 90 Series tape sealed
products: Passes immersion test using water/
detergent. Acceptable solutions
include 1-1-1 trichlorethane, freon, (TF, TE,
or TMS), isopropyl alcohol, detergent (140°F
maximum). Terpene acceptable for Series 90
only. Solutions which are not recommended
include acetone, methylene chloride, freon TMC.
Materials and Finishes
Shorting Member (Ball): Brass, gold-plated
10 microinches minimum over nickel barrier.
Base Contacts: Copper alloy, gold-plated over
nickel barrier.
Terminals: Copper alloy, matte-tin plated over
nickel barrier.
Non-Conductive Parts: Thermoplastic
(UL94V-O)
Potting Material: Epoxy, 76,78 only.
Protective Cover: 76,78, only-Polycarbonate.
Tape and Reel Packaging
Tape Seal:
76, 78: Polyester lm
90: Polyimide lm
Tape Seal Integrity: Passes gross leak test
using 125°C ourinert for 20 seconds minimum.
Reference MIL-STD-202, Method 112.
