MIL-PRF-28776 Relays, Hybrid, Established Reliability, General Specification ForThis specification establishes the general requirements for relays that use a combination of solid state circuit input elements functioning with an electro-mechanical relay that performs the switching functions associated with control system applications \(see 6.1\). These relays are designed to operate in low and medium power switching circuits with contact ratings up to 1 ampere alternating current \(ac\) or direct current \(dc\). The failure rate level is established at a confidence level of 90 percent for qualification and 60 percent for maintenance of qualification based on 100,000 cycles at +125┬░C under rated load conditions specified herein. Excludes time delay relays. CAUTION: The use of any coil voltage less than the rated coil voltage will compromise the operation of the relay. CAUTION: Pick-up, hold, and dropout voltages are for test purposes only and are not to be used as design criteria. For additional application and caution information, see 6.1.

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MIL-PRF-28776F

3.24 Intermediate current (see 4.8.19). During cycling, unless otherwise specified (see 3.1), the resistance of a

closed contact shall be less than or equal to 3 ohms and the voltage across an open contact shall be 95 percent or

more of applied load voltage. After cycling, the static contact resistance shall be measured at room ambient (+25�C)

and shall not exceed the limits as specified (see 3.1). Intermediate current shall not be considered a low level or high

level contact load rating (see 6.1.1). There shall be no mechanical or electrical failure. Welding of contacts, failure to

make, carry or break the load, or failure of the fuse connected between case and load system ground or neutral shall

constitute a failure. Relays indicating failure, not verified per a failures verification procedure approved by the

qualifying activity, may be returned to test. During post life tests, failure of a diode, transistor, or FET coil driver shall

constitute a failure.

3.25 Mechanical life (see 4.8.20). After cycling, the insulation resistance and dielectric withstanding voltage shall

not exceed the limits as specified (see 3.1) and the turn-on and turn-off time shall not exceed 120 percent of the limits

specified (see 3.1). There shall be no mechanical or electrical failure during or following cycling. Failure of the fuse

connected between case and load system ground or neutral shall constitute a failure. For relays with semiconductor

devices, failure of a diode, transistor, or FET coil driver shall constitute a failure. The manufacturer's test system shall

have the means to ensure that the required number of test cycles have been performed.

3.26 Resistance to solvents (see 4.8.21). The marking shall remain legible.

3.27 Voltage transients (4.8.22). There shall be no opening of closed contacts in excess of 10 �s nor closing of

open contacts in excess of 10 �s.

3.28 Marking.

3.28.1 JAN and J marking. The United States Government has adopted, and is exercising legitimate control over

the certification marks "JAN" and "J", respectively, to indicate that items so marked or identified are manufactured to,

and meet all the requirements of specifications. Accordingly, items acquired to and meeting all of the criteria

specified herein and in applicable specification, shall bear the certification mark "JAN" except that items too small to

bear the certification mark "JAN" shall bear the letter "J". The "JAN" or "J" shall be placed immediately before the

part number except that if such location would place a hardship on the manufacturer in connection with such marking,

the "JAN" or "J" may be located on the first line above or below the part number. Items furnished under contracts or

orders which either permit or require deviation from the conditions or requirements specified herein or in applicable

specifications shall not bear "JAN" or "J". In the event an item fails to meet the requirements of this specification and

the applicable specification sheets or associated specifications, the manufacturer shall remove completely the military

part number and the "JAN" or the "J" from the sample tested and also from all items represented by the sample. The

"JAN" or "J" certification mark shall not be used on products acquired to contractor drawings or specifications. The

United States Government has obtained Certificate of Registration Number 504,860 for the certification mark "JAN"

and Registration Number 2,577,735 for the certification mark "J".

3.28.2 Identification marking (full). Relays shall be marked in accordance with method I of MIL-STD-1285 and

shall include the following information:

Military PIN (see 1.2 and 3.1). The "JAN" or "J" shall not be marked in front of the PIN.

"JAN" or "J" brand. The "JAN" or "J" shall appear directly above or below the "M" of the military PIN

(examples: JAN

M28776/6-001L)

M28776/6-001L or J

Date code (at the option of the manufacturer, the "J" with the date code may be used instead of b). The

date code shall provide traceability (see 4.2.2).

Source code.

Lot symbol (optional).

Rated coil voltage (or current) (see 3.1) and when applicable, operating frequency.

Coil current.