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

Ratings

76

78

90B

Mechanical Life: Operations per switch position

20,000

20,000

5,000

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:

10,000

10,000

—

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.

lnitially:

750 V

750 V

500 V

After life:

500 V

500 V

500 V

Current Carry Rating: Maximum rise of 20°C

5 A4 A3 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 and Military Qualified 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 specification;

no failures; passes contact resistance.

Terminal Strength: Per specification

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

(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 flux touching

switch body.

Cleaning: 76RSB, 90: 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

10 microinches minimum over nickel barrier.

Terminals:Copperalloy,solder-platedovernickel

barrier.

Non-ConductiveParts:Thermoplastic(UL94V-O)

Potting Material: Epoxy, 76,78 only.

Protective Cover: 76,78, only-Polycarbonate.

Tape and Reel Packaging

Tape Seal:

76, 78:

Polyester film

90:

Polyimide film or foil

Tape Seal Integrity: Passes gross leak test using

125°C flourinert for 20 seconds minimum.

Reference MIL-STD-202, Method 112.

B-16