#MIL-PRF-556291D Tri-break Fused Circuit Breaker | Circuit Breakers

MIL-PRF-556291D

Circuit Breaker

NSN 5925-01-357-7027

DEMIL
Shelf Life
UOM
NIIN
Demil:
NO
Shelf Life:
N/A
UOM:
1 EA
NIIN:
013577027

Product Technical Spec.

Body Style:
Single pole type
Body Length:
Between 2.479 inches and 2.541 inches
Body Width:
Between 0.724 inches and 0.786 inches
Case Material:
Plastic
Center To Center Distance Between Terminals Parallel To Length:
Between 1.779 inches and 1.841 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length:
Between 2.031 inches and 2.06393 inches
Boss Height:
Between 0.109 inches and 0.171 inches
Mounting Surface To Terminal End Distance:
Between 2.522 inches and 2.584 inches
Pole Quantity:
1
Mounting Facility Type And Quantity:
2 threaded hole
Maximum Continuous Load Current Rating Per Pole:
6.0 amperes ac single location
Operating Voltage Type And Rating Per Pole In Volts:
240.0 ac single location
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps:
1000.0 ac single location
Circuit Protection Type:
Overcurrent single location
Trip Release Method:
Magnetic single location
Trip Release Characteristic:
Time delay single location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent:
125.0 single location
Reset Method:
Manual
Main Contact Tripping Mechanism Type:
Trip free
Manual Actuator Type And Quantity:
1 toggle
Actuator Function:
Trip-reset
Actuator Position Designation:
At pole one
Internal Trip Release Configuration:
Series trip single location
Thread Size:
0.138 inches
Trip Delay Time In Seconds Per Rated Continuous Current:
0.200 at 200 pct single location and 2.000 at 200 pct single location
Frequency In Hertz:
400.0 single location
Thread Series Designator:
Unc
Terminal Type And Quantity:
2 threaded stud
NSN:
5925-01-357-7027
Item Name:
Tri-break Fused Circuit Breaker
Cage Code:
81349

Cross Referenced Parts

Part Number
Cage
RNCC
RNVC
RNAAC
Status
MSDS
SADC
Part Number:
M55629/1-342
Cage Code:
81349
RNCC:
2
RNVC:
2
RNAAC:
TX
Status:
A
MSDS:
SADC:
Part Number:
MIL-C-55629/1
Cage Code:
81349
RNCC:
5
RNVC:
9
RNAAC:
TX
Status:
A
MSDS:
SADC:
Part Number:
M55629/1-342
Cage Code:
81349
RNCC:
2
RNVC:
2
RNAAC:
TX
Status:
A
MSDS:
SADC:
Part Number:
MIL-C-55629/1
Cage Code:
81349
RNCC:
5
RNVC:
9
RNAAC:
TX
Status:
A
MSDS:
SADC:
Part Number:
M55629/1-342
Cage Code:
81349
RNCC:
2
RNVC:
2
RNAAC:
TX
Status:
A
MSDS:
SADC:
Part Number:
MIL-C-55629/1
Cage Code:
81349
RNCC:
5
RNVC:
9
RNAAC:
TX
Status:
A
MSDS:
SADC:

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Catalog Drilldown
--- Electrical And Electronic Equipment Components
------ Circuit Breakers
--------- Overload Switches
------------ P/N MIL-PRF-556291D

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Last Updated: 07/23/2025