Model: 53-121-4-MG3

Circuit Breaker

Properties:

Body Style
Multipole-multiple actuator type
Body Length
3.719 inches
Body Width
3.063 inches
Case Material
Plastic
Center To Center Distance Between Terminals Parallel To Length
3.060 inches
Center To Center Distance Between Terminals Parallel To Width
1.030 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length
2.750 inches
Switch Contact Arrangement
Single pole, double throw
Distance Between Centerlines Of Mounting Facilities Parallel To Body Width
1.030 inches
Fragility Factor
Moderately rugged
Boss Height
0.156 inches
Mounting Surface To Terminal End Distance
Between 3.120 inches and 3.240 inches
Pole Quantity
3
Mounting Facility Type And Quantity
6 threaded hole
Storage Type
General purpose warehouse
Special Handling Feature
Magnetic
Thready Qty Per Inch (tpi)
32
Maximum Continuous Load Current Rating Per Pole
7.5 amperes ac all locations
Operating Voltage Type And Rating Per Pole In Volts
416.0 ac all locations
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps
1500.0 ac all locations
Circuit Protection Type
Overcurrent all locations
Trip Release Method
Magnetic all locations
Trip Release Characteristic
Time delay single location
Ultimate Trip Rating Of Continuous Current Rating Per Pole In Percent
150.0 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
Auxiliary Switch Function And Quantity
1 alarm
Internal Trip Release Configuration
Series trip all locations
Thread Size
0.138 inches
Switch Location And Position Designation
Internal at pole three
Trip Delay Time In Seconds Per Rated Continuous Current
20.500 at 200 pct all locations and 80.000 at 200 pct all locations
Inclosure Protection Type For Which Designed
Fungus resistant and vibration resistant and humidity resistant and salt spray proof
Switch Terminal Type
Turret
Switch Current Rating And Type In Amps
5.0 ac and 5.0 dc
Switch Voltage Rating And Type In Volts
115.0 ac and 28.0 dc
Frequency In Hertz
400.0 all locations
Precious Material And Location
Terminal surfaces silver
Precious Material
Silver
Thread Series Designator
Unc
Terminal Type And Quantity
6 threaded stud
NSN
5925-01-043-3153
Part Number
53-121-4-MG3
Description
Circuit Breaker
CAGE
74193

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 53-121-4-MG3 NSN 5925-01-043-3153

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:
S
ESD:
ESD:
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
5.0 X 4.0 X 2.0
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
--
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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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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