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MIL-R-6106 Revision J, November 2, 1981
Complete Document
Superseded By: MIL-PRF-6106
Includes all amendments and changes through Amendment 3, August 25, 1989
Additional Comments: CNCL S/S BY MIL-PRF-6106
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This specification establishes general requirements for electromechanical relays (including ER types) with nominal contact ratings from five amperes (resistive) and upward for use in electrical applications. Auxiliary contacts may be rated at lower currents. 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. Other ratings may be as specified (see 3.1).

Relays covered by this specification shall be classified by the type specified in 1.2.1, and by the environment levels of 1.2.2 (see 3.1 and 6.1).

The type is identified by one of the following designators:
     Type I    - Continuous duty, hermetically sealed.
     Type I ER - Continuous duty, hermetically sealed, established reliability, the
                 maximum failure rate is to be identified by the reliability
                 identifying letter (eg:  M for 1 percent/10,000 operations, U for
                 0.5 percent/10,000 operations, X for 0.3 percent/10,000 operations
                 or P for 0.1 percent/10,000 operations).
     Type II   - Continuous duty, unsealed.
     Type III  - Intermittent duty (hermetically sealed, environmentally sealed,
     Type IV   - Continuous duty, environmentally sealed, (nonhermetic).

Relays covered by this specification shall meet one of the vibration characteristics shown in table I and 4.7.17 (see 3.1). TABLE I. Vibration characteristic.
Characteristic   Maximum acceleration   Frequency range,Hz
       a            15 g                    10 to 2,000
       b            20 g                    10 to 2,000
       c            30 g and random         10 to 3,000
       d            Other                   Other

Relays covered by this specification shall meet one of the temperature ranges shown in table II (see 3.1). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Air Force Acquisition Logistics Division, Electronic Support Division (AFALD/PTSP), Gentile Air Force Station, Dayton, Ohio 45444, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. TABLE II. Temperature range.
Range   Temperature range, °C
      a         −55 to +85
      b         −70 to +125
      c         −70 to +200
      d          Other

Relays covered by this specification shall meet one of the shock characteristics shown in table III (see 3.1). TABLE III. Shock characteristic.
Characteristic   Shock level (in accordance with MIL-STD-202)
      a            50 g (test condition A, method 213)
      b            75 g (test condition B, method 213)
      c            100 g (test condition C, method 213)
      d            High-impact (method 207)
      e            Other

Relays covered by this specification shall meet one of the altitude ratings of table IV (see 3.1). TABLE IV. Altitude level.
Rating   Maximum altitude - feet
    a             10,000
    b             50,000
    c         80,000/300,000 1/
    d             Other

1/  Altitude dielectric withstanding
    voltage shall be performed at
    80,000 feet.

Information concerning Class "0" relays is covered in 6.5.