Model: AM3-A39-A-40-252

Circuit Breaker

Special Features:

Function: circuit breaker, magnetic, 40 amp; reference data: cb-4401, instruction book arsr-1d/e/f, vol 5, sec 10, pg 10-759; cb-4401, instruction book arsr-2, vol 5, sec 10, pg 10-563

Properties:

Body Style
Multipole-multiple actuator type
Body Length
Between 2.490 inches and 2.510 inches
Body Width
Between 2.240 inches and 2.510 inches
Case Material
Plastic
Center To Center Distance Between Terminals Parallel To Length
Between 1.928 inches and 1.948 inches
Center To Center Distance Between Terminals Parallel To Width
Between 0.740 inches and 0.760 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length
Between 2.052 inches and 2.072 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Width
Between 0.740 inches and 0.760 inches
Fragility Factor
Moderately rugged
End Application
Air route surveillance radar 1, fa7171 amplitron power supply cabinet; arsr-2, fa7121 amplitron power supply cabinet
Boss Height
Between 0.130 inches and 0.150 inches
Mounting Surface To Terminal End Distance
Between 2.461 inches and 2.481 inches
Pole Quantity
3
Arc Quenching Method
Magnetic blowout
Mounting Facility Type And Quantity
6 threaded stud
Storage Type
General purpose warehouse
Maximum Continuous Load Current Rating Per Pole
40.0 amperes ac all locations
Operating Voltage Type And Rating Per Pole In Volts
250.0 ac all locations
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
5000.0 ac all locations
Circuit Protection Type
Overcurrent all locations
Trip Release Method
Thermal-magnetic all locations
Trip Release Characteristic
Instantaneous all locations
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
130.0 all locations
Ultimate Trip Time Per Pole In Seconds
10.000 all locations
Reset Method
Manual
Main Contact Tripping Mechanism Type
Trip free
Manual Actuator Type And Quantity
3 toggle
Actuator Function
Trip-reset
Actuator Position Designation
At each pole
External Actuator Linkage Arrangement
One, two, and three linked
Thread Size
0.138 inches
Inclosure Protection Type For Which Designed
Dustproof
Trip Release Ambient Tempurature Rating
77.0 degrees fahrenheit all locations
Frequency In Hertz
60.0 all locations
Thread Series Designator
Unc
Terminal Type And Quantity
9 tab, solder lug or 6 threaded stud
NSN
5925-01-248-5793
Part Number
AM3-A39-A-40-252
Description
Circuit Breaker
CAGE
08125

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 element(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.

Part AM3-A39-A-40-252 NSN 5925-01-248-5793

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00136
FIIG:
A030A0
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
N

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Schedule B and Export
  • Schedule B: 8536200040
  • SITC: 77252
  • End Use: Electric apparatus
  • NAICS: 335313
  • USDA: 1

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

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