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Circuit Breaker

NSN: 5925-01-227-4631 | Model: M55629/3-087

A device with means other than fuses for automatically opening the circuit in which it is installed when the current varies from the predetermined value for which the device is set. May include provisions for manual operation. At least one set of contacts must be in series with the actuating elemen (s). A combination of semiconductor and passive devices may be used in lieu of contacts. For automatically operated items in which the actuating (tripping) element and contacts are not in series, see relay (as modified). For items which are operated both manually and automatically but the actuating elements and contact are not in series, see relay-switch. Excludes circuit breaker box and magneto "breaker" assemblies. See also switch (as modified) ; and controller.

NSN Properties and Flags
NATO Stock Number
5925-01-227-4631
DEMIL
NO
Body Length
2.510 inches
Body Width
Between 1.437 inches and 1.563 inches
Case Material
Plastic
Center To Center Distance Between Terminals Parallel To Length
Between 1.660 inches and 1.960 inches
Center To Center Distance Between Terminals Parallel To Width
Between 0.719 inches and 0.781 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length
Between 2.046 inches and 2.078 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Width
Between 0.719 inches and 0.781 inches
Fragility Factor
Moderately rugged
Boss Height
Between 0.109 inches and 0.171 inches
Mounting Surface To Terminal End Distance
2.553 inches
Pole Quantity
2
Arc Quenching Method
Magnetic blowout
Mounting Facility Type And Quantity
4 threaded hole
Storage Type
General purpose warehouse
Thready Qty Per Inch (tpi)
32
Maximum Continuous Load Current Rating Per Pole
12.5 amperes ac all locations
Operating Voltage Type And Rating Per Pole In Volts
240.0 ac all locations
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
1000.0 ac all locations
Circuit Protection Type
Overcurrent all locations
Trip Release Method
Magnetic all locations
Trip Release Characteristic
Time delay all locations
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
125.0 all locations
Reset Method
Manual
Main Contact Tripping Mechanism Type
Trip free
Manual Actuator Type And Quantity
2 toggle
Actuator Function
Trip-reset
Actuator Position Designation
At each pole
External Actuator Linkage Arrangement
One and two linked
Internal Trip Release Configuration
Series trip all locations
Thread Size
0.138 inches
Trip Delay Time In Seconds Per Rated Continuous Current
2.200 at 200 pct all locations and 20.000 at 200 pct all locations
Inclosure Protection Type For Which Designed
Shock resistant and vibration resistant
Frequency In Hertz
60.0 all locations
Test Data Document
81349-mil-c-55629 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Unc
Terminal Type And Quantity
4 threaded stud
Specification Data
81349-mil-c-55629/3 government specification

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NSN 5925-01-227-4631 Datasheet

Supply Class (FSC):
Circuit Breakers
Cross Reference:
  • M55629/3-087
  • MIL-PRF-55629/3D
  • MIL-C-55629/3
  • M55629/3-087
  • MIL-PRF-55629/3D
  • MIL-C-55629/3
Cage Codes:
  • Military Specifications (CAGE 81349)
Schedule B & Trade:
  • Schedule B: 8536200040 (NAICS 335313)

    Automatic circuit breakers, for a voltage not exceeding 1, 000 v, nesoi

  • SITC: 77252

    Automatic circuit breakers for a voltage not exceeding 1, 000 volts

  • End Use: 20005

    Electric apparatus

Identification:
HMIC

P - Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of federal standard 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

PMIC

A - Item does not contain precious metal.

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    061300 - Circuit breaker/switch noi

  • WCC:

    658 - Electrical appliances, small

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    H - Instruments/equipment/supplies for radio, communications, electrical, laboratory, etc. (includes signal corps)

  • LTL:

    P - 77.5

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
    Sms
  • AAC
    J
  • Quantity per pack
    1
  • Unit of Measure
    Ea
  • Shelf Life
    N/A
  • Classification Control
    U
  • MGMT_CTL
    9b-----
  • Repariability

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $113.48 to $189.14..
Does NSN 5925-01-227-4631 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Navy
What is the NIIN of NSN 5925-01-227-4631?
012274631 or 01-227-4631
Does NSN 5925-01-227-4631 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5925-01-227-4631?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Mar 03, 1986