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MIL-PRF-55629 Circuit Breakers, Magnetic, Unsealed Or Panel Seal, Trip-Free, General Specification ForThis specification covers the requirements and test procedures for single and multipole, trip-free, unsealed, magnetic circuit breakers with current ratings of 0.2 amperes to 100 amperes inclusive, up to and including 240 volts, 400 Hertz, 480 volts, 60 Hertz alternating current \(ac\) and 125 volts direct current \(dc\), \(see 6.1\). These circuit breakers may also include auxiliary contacts \(see 6.6.1\) for monitoring circuits. A voltage sensitive pole is also available in a four pole device. Panel seal mounts are available in 0.2 amperes through 50 amperes. Designers are WARNED that these circuit breakers may contain a pure tin finish on some of the component parts \(see 6.5\).

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MIL-PRF-55629E

TABLE II. Verification of qualification inspection.

Inspection 1/, 3/

Part number

Requirement

Test method

Number of

paragraph

samples

M55629/2-001

M55629/1-128

M55629/4-001

M55629/3-128

(1 Quarter)

M55629/6-001

3.1, 3.5, and 3.19

4.8.1 and 4.8.15

Shock and dimensions

M55629/5-128

M55629/20AL

M55629/7-114

M55629/21ALAL

M55629/9-114

M5562292/22ALALAL

M55629/11-114

M55629/2-005

M55629/1-132

M55629/4-005

M55629/3-132

(2 Quarter)

M55629/6-005

Vibration and dimensions

M55629/5-132

3.1, 3.5 and 3.16

4.8.1 and 4.8.12

M55629/20AP

M55629/7-118

M55629/21APAP

M55629/9-118

M55629/22APAPAP

M55629/11-118

M55629/2-003

M55629/1-130

M55629/4-003

M55629/3-130

(3 Quarter)

M55629/6-003

Salt atmosphere and

M55629/5-130

3.1, 3.5, and 3.21

4.8.1 and 4.8.17

dimensions

M55629/20AM

M55629/7-116

M55629//21AMAM

M55629/9-116

M55629/22AMAMAM

M55629/11-116

M55629/2-129

M55629/4-129

M55629/6-129

M55629/8-115

(4 Quarter) 2/

M55629/10-115

3.1, 3.5, 3.6,

4.8.1, 4.8.2, 4.8.13

M55629/12-115

3.17, and 3.18

and 4.8.14

M55629/20UM

M55629/21UMUM

M55629/22UMUMUM

1/ Dimensions taken shall be variables data. Dimensional verification may be waived with approval from the

qualifying activity if the contractor can demonstrate that these tests have been performed for three consecutive

periods with zero failures.

2/ Thermal shock and dimensions shall be performed the 4 quarter of the first year, solderability and dimensions

shall be performed the 4 quarter of the second year, and moisture resistance and dimensions shall be

performed the 4 quarter of the 3 year. After the 3 year, the sequence repeats.

3/ If the contractor can demonstrate that these tests have been performed for three consecutive periods with zero

failures, the frequency of these tests may be reduced after approval by the qualifying activity.

(i.e.; each quarterly test would become an annual test taking 6 years to complete a total cycle). If the design,

material, construction, or processing of the circuit breakers change, or if there are any quality problems or

failures, the qualifying activity may require resumption of the original test frequency.