MIL-DTL-26126 Relays, Electrical, Overvoltage, Dc, General Specification ForThis specification covers the general requirements for dc overvoltage sensing relays for use in electrical applications. Relays covered by this specification are capable of meeting the electrical and environmental requirements when mounted directly to the structure of aircraft, missile, spacecraft, ship, and other primary vehicles or in ground support and shipboard equipment.

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MIL-DTL-26126C

3.5.9 Acceleration. When tested as specified in 4.6.10, the relay contacts shall not close for more

than 10 microseconds during the test.

3.5.10 Shock (specified pulse). When tested as specified in 4.6.11, the relay contacts shall not close

for more than 10 microseconds during the tests. Following the test, the relay shall meet the dielectric

withstanding voltage requirements specified in 3.5.1.

3.5.11 Fungus resistance (type I relays only, (see 3.1)). After testing as specified in 4.6.12, the relay

shall meet the dielectric withstanding voltage requirements specified in 3.5.1. Any fungus growth shall be

cause for rejection.

3.5.12 Stray magnetic fields (type I relays only). When tested as specified in 4.6.13, there shall be no

closure of the relay contacts.

3.5.13 Humidity. After the 240 hour period, when tested as specified in 4.6.14, the relay shall meet the

calibration requirements specified in 3.5.2. Following drying and return to room temperature, the relay

shall meet the calibration and dielectric withstanding voltage requirements specified in 3.5.2 and 3.5.1.

3.5.14 Salt spray. When tested as specified in 4.6.15, there shall be no evidence of breaking,

cracking, chipping or flaking of the finish, exposure of the base metal due to corrosion, or effect on the

operational characteristics, which adversely affect the application or performance of the relay. After the

test, type I relays shall meet the calibration requirements specified in 3.5.2.

3.5.15 Thermal shock. When relays are tested as specified in 4.6.16, there shall be no breaking,

cracking, chipping or flaking of the finish, or loosening of the terminals. Following the test, relays shall

meet the calibration requirements specified in 3.5.2.

3.5.16 Seal.

3.5.16.1 Type I relays. When relays are tested as specified in 4.6.17b.(1), the leakage rate of the

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hermetically sealed switching device shall not exceed 1x10 atm cc/s.

3.5.16.2 Type II relays. When relays are tested as specified in 4.6.17b.(2), the leakage rate shall not

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exceed 1x10 atm cc/s for relays greater than 2 cubic inches in volume and 1x10 atm cc/s for relays 2

cubic inches or less in volume.

3.5.16.3 Type I and type II relays with potting (rather than gas) filler. When relays are tested as

specified in 4.6.17.1, there shall be no evidence of leakage.

3.5.17 Resistance to solvents. When relays are tested as specified in 4.6.18, the marking shall remain

legible.

3.6 Weight. The weight of the relay shall not exceed the value specified in 3.1.

3.7 Marking. Relays shall be marked in accordance with method I of MIL-STD-1285, and shall include

the military PIN; CAGE code or manufacturer's name; date code and lot symbol; circuit schematic

diagram; highest contact rating (amperes) and rated dc input voltage.

3.8 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or

environmentally preferable materials should be used to the maximum extent possible provided that the

material meets or exceeds the operational and maintenance requirements, and promotes economically

advantageous life cycle costs.