MIL-PRF-55629/3G
REQUIREMENTS
Dimensions and configuration: See figures 1 and 2.
Current ratings: See tables I and II.
Voltage ratings: See table III through table VIII. 240 V ac breakers are designed also for use at 120 V
ac.
High inrush: Applicable to time delays K, L, M, N, P, R, S, and T. Non-time delays H, I, and J are not
high inrush delays.
Tripping-time delays: See table III through table VIII.
Terminal and mounting hardware: See figures 1 and 2.
Terminals: See figures 1 and 2.
Actuator strength: 25 pounds.
Actuator operating force: 8 pounds, maximum.
Terminal strength:
Applied load: 30 pounds.
Applied torque: 22 inch-pounds.
Vibration: Energized current shall be 90 percent for characteristics H, I, and J.
Shock: Energized current shall be 90 percent for characteristics H, I, and J.
Interrupting capacities:
2,000 amperes at 50 V dc.
2,000 amperes at 120 V ac, 60 Hz.
1,500 amperes at 120 V ac, 400 Hz.
1,000 amperes at 240 V ac, 60 and 400 Hz.
Part or Identifying Number (PIN): M55629/3- (dash number from table I for circuit breakers with both
poles of identical current rating and time delay) or M55629/3- (four letter code from table I for circuit
breakers with poles of mixed current ratings or time delay), or both.
For pole identification, see figure 1
Pole 1 Pole 2
M55629/3
E
A
E
C
Two pole circuit breaker
without auxiliary contacts.
Current rating code, see table I. 1/ {
Voltage, frequency, and time delay {
curve code, see table I. 1/
_____
1/ For mixed poles, poles 1 and 2, respectively shall be coded in ascending order of current rating code
letter. If both poles have identical current ratings, they shall be coded in ascending order of voltage,
frequency, and time delay code letter.
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