Circuit Breakers - United States (US)

Federal Supply Class (FSC): 5925

NATO Supply Classification Class (NSC): 5925

Federal Supply Group (FSG): 59 Electrical and Electronic Equipment Components

NATO Supply Classification Group (NSG): 59 Electrical and Electronic Equipment Components

Items Managed by United States (US) - NCB is 00 to 09

Page 34 of 104

NSN Format for Circuit Breakers
Codified by United States

592501XXXXXXX
Group
FSG
ClassNCBIdentifier
FSC
Federal Supply Class
NIIN
NSN

NATO Supply Class 5925 is specifically designated for circuit breakers. Circuit breakers are devices used to protect electrical circuits from overloads or short circuits by interrupting the flow of current. They are essential components in electrical systems to ensure the safety and proper functioning of equipment.

Circuit breakers in this supply class are categorized based on their specific characteristics, such as voltage rating, current rating, and trip characteristics. These characteristics determine the circuit breaker's ability to handle different electrical loads and respond to different fault conditions.

NATO Supply Group 59 encompasses electrical and electronic equipment components. This group includes a wide range of items used in electrical and electronic systems, such as connectors, switches, relays, resistors, capacitors, and more. Circuit breakers, as part of this group, play a crucial role in protecting these systems from damage caused by excessive current or faults.

When procuring circuit breakers or other electrical and electronic equipment components within NATO, it is important to refer to the NATO Supply Classification System (NSCS). The NSCS provides a standardized classification system to facilitate procurement, logistics, and inventory management within NATO member countries.

By using the NATO Supply Class 5925 for circuit breakers, you can ensure that you are sourcing the appropriate equipment for your electrical systems within the NATO framework.

FSC 5925 Circuit Breakers - United States (US)
FSC 5925 Circuit Breakers - United States (US)

Includes Circuit Breakers and Cutouts.

Excludes Relays.

Note-Mounting hardware, included in classes of this group, includes such specially designed items as brackets, holders, retainers, etc. Excluded from classes in this group are such hardware items as screws (Class 5305), bolts (Class 5306), studs (Class 5307), washers (Class 5310), rivets (Class 5320), and other common items indexed to specific classes, other than in Group 59. The FSC indexes and structure will govern the classification of items used on or with mounting hardware cited above.

Frequently Asked Questions(FAQ) for Federal Supply Class 5925 Frequently Asked Questions(FAQ) for Federal Supply Class 5925

What is Federal Supply Class 5925?
FSC 5925 is the Federal Supply Class (formally known as NATO Supply Classification Class NSC 5925) in the USA for supply items codified in the category of Circuit Breakers.
What is NATO Supply Classification Class 5925?
NSC 5925 is the NATO Supply Classification Class (also known as Federal Supply Class FSC 5925 in the USA) for supply items codified in the category of Circuit Breakers.
Which Federal Supply Group is FSC 5925 in?
FSC 5925 is in Federal Supply Group (FSG) 59 which contains Electrical and Electronic Equipment Components.
Which NATO Supply Classification Group is NSC 5925 in?
NSC 5925 is in NATO Supply Classification Group (NSG) 59 which contains Electrical and Electronic Equipment Components.

Supply Items Included in Federal Supply Class 5925 Supply Items Included in Federal Supply Class 5925

What is a Circuit Breaker Contact Set? 32 Items
A Circuit Breaker Contact Set (CONTACT SET,CIRCUIT BREAKER) is a grouping of two or more separate circuit breaker contacts. Excludes CONTACT ASSEMBLY, ELECTRICAL.
What is a Circuit Breaker? 25517 Items
A Circuit Breaker is 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.
What is a Circuit Breaker Subassembly? 444 Items
A Circuit Breaker Subassembly is two or more different types of items, having a common mounting or mounted on each other, which together form a portion of a circuit breaker, but which in itself is not a complete functioning item and cannot be assigned a more definite item name. Excludes COIL, ELECTRICAL; THERMAL RELEASE, CIRCUIT BREAKER; and TRIPPER, CIRCUIT BREAKER.
Cover,Circuit Breaker 194 Items
What is a Circuit Breaker Armature? 19 Items
A Circuit Breaker Armature (ARMATURE,CIRCUIT BREAKER) is an item which is the pivoted or spring-mounted ferromagnetic portion of a circuit breaker, and which moves to break and/or make an electrical circuit in response to electromagnetic changes.
What is a Circuit Breaker Thermal Release? 140 Items
A Circuit Breaker Thermal Release (THERMAL RELEASE,CIRCUIT BREAKER) is an item containing fusible material which melts when the temperature reaches a predetermined value caused by an overload in an electrical circuit. The melting (fusion) of the material mechanically causes contacts to open and/or close. The item may include an integral heating element, such as a coil or resistor, but does not include contacts. Excludes COIL, CIRCUIT BREAKER; HEATER, THERMAL RELEASE; and TRIPPER, CIRCUIT BREAKER.
Base,Circuit Breaker 79 Items
What is a Circuit Breaker Tripper? 834 Items
A Circuit Breaker Tripper (TRIPPER,CIRCUIT BREAKER) is an electromechanical device which releases the holding mechanism and permits the contacts of a circuit breaker to open. It is a replacement part of a circuit breaker. Does not include relays. See also THERMAL RELEASE, CIRCUIT BREAKER.
What is a Circuit Breaker Box? 478 Items
A Circuit Breaker Box is an enclosure which includes, mounts, and protects one or more circuit breakers. It is designed for and may include a cover and such accessories as mounting hardware, brackets, and conduit fittings. May include terminal boards and/or bus conductors used as a convenience for terminating the circuit breakers. May include handle tie bars. It is usually used as a load center for the protection of certain electrical devices such as water heaters, motors, etc., or as a service center for homes or offices. For boxes which include only switches, jacks, fuseholders, terminals and/or terminal boards or fuseholders, or any combination of these devices, see SWITCH BOX; JACK BOX; TERMINAL BOX; and DISTRIBUTION BOX. For boxes designed to mount and protect but do not include circuit breakers, see CIRCUIT BREAKER BOX SUBASSEMBLY. See also INTERCONNECTING CABINET; PANEL, POWER DISTRIBUTION; JUNCTION BOX; and CABINET, ELECTRICAL EQUIPMENT.
What is a Ground Fault Interrupter? 133 Items
A Ground Fault Interrupter (INTERRUPTER,GROUND FAULT) is an electrical safety device designed for insertion in a power distribution circuit to provide protection against serious injury or death caused by contact with damaged or defective electrical equipment. It disconnects the ungrounded conductor(s) when its integral circuitry senses an undesirable current flow to earth (ground). It includes a reset feature and may have a test facility. It may be designed for installation in an electrical panel or box, or may be a portable unit with its own enclosure. May include switches, circuit breakers, fuses, and the like; portable units may have connecting cables. Excludes overcurrent protective devices which also provide a ground fault sensing and interrupting capability. See also CIRCUIT BREAKER.
What is a Circuit Breaker Box Subassembly? 56 Items
A Circuit Breaker Box Subassembly is an enclosure which is designed to mount and protect one or more circuit breakers. It does not include the circuit breakers. It is designed for and may include a cover and accessories as mounting hardware, brackets, and conduit fittings. May include terminal boards and/or bus conductors used as a convenience for terminating the circuit breakers. For items which include circuit breakers, see CIRCUIT BREAKER BOX. For boxes not designed to mount and protect circuit breakers, see JUNCTION BOX.
What is a Circuit Breaker Shield? 22 Items
A Circuit Breaker Shield (SHIELD,CIRCUIT BREAKER) is an item specifically designed to be placed around or over one or more CIRCUIT BREAKER in order to prevent or reduce electrical and/or mechanical interference.
What is a Circuit Breaker Locking Device? 74 Items
A Circuit Breaker Locking Device (LOCKING DEVICE,CIRCUIT BREAKER) is an item of various shapes, having an integral locking device or facilities to accommodate an external locking device, which is designed to prevent unauthorized actuation of a CIRCUIT BREAKER. Excludes items designed to protect the actuator from damage or inadvertant throwing, see GUARD, SWITCH.
What is a Circuit Breaker Trip Device? 75 Items
A Circuit Breaker Trip Device (TRIP DEVICE,CIRCUIT BREAKER) is a device used to trip the circuit breakers requiring an ac voltage by using the stored energy in a capacitor.

Stock Items From Supply Class 5925 Stock Items From Supply Class 5925 Page 34 of 104

005817075
703038SH1
RNCC: 3 | RNVC: 2
703038
RNCC: 5 | RNVC: 2
SS580-302-1765186SH1
RNCC: 5 | RNVC: 2
005816790
MP703B
RNCC: 3 | RNVC: 2
005814936
999059-40
RNCC: 3 | RNVC: 2
XAM33MG3-50-7
RNCC: 5 | RNVC: 9
XAM33MG350125AC5
RNCC: 5 | RNVC: 9
005813664
405D201
RNCC: 3 | RNVC: 9
MILC17587
RNCC: 4 | RNVC: 1
405D201
RNCC: 5 | RNVC: 2
405D201SUB2
RNCC: 5 | RNVC: 9
S022Y7880B1
RNCC: 5 | RNVC: 9
S022Y6927B1
RNCC: 5 | RNVC: 9
S023Y1005B1
RNCC: 5 | RNVC: 9
005811888
1531786
RNCC: 3 | RNVC: 2
AB
RNCC: 3 | RNVC: 2
545393
RNCC: 5 | RNVC: 2
GCP9
RNCC: 5 | RNVC: 9
005772897
K7124566P5
RNCC: 3 | RNVC: 2
AM1515-15M6
RNCC: 5 | RNVC: 1
PCB730AM1515-15MG3CURVE2
RNCC: 5 | RNVC: 2
005726357
V9491421P1
RNCC: 3 | RNVC: 2
V9491421P1
RNCC: 3 | RNVC: 2
38552-120
RNCC: 3 | RNVC: 2
403135
RNCC: 5 | RNVC: 2
005725663
M55629/4-079
RNCC: 2 | RNVC: 2
MIL-PRF-55629/4
RNCC: 4 | RNVC: 1
MIL-C-55629/4
RNCC: 5 | RNVC: 9
70-255-1MG6CURVE5
RNCC: C | RNVC: 1
11077014-34
RNCC: C | RNVC: 1
APL-11-1R0-55629/4-079
RNCC: C | RNVC: 1
005696122
TEF113020WL
RNCC: 3 | RNVC: 9
005682664
JC1-B3-J-A-2-65DC-2
RNCC: 3 | RNVC: 2
JC1B3A2-2GRAY
RNCC: 5 | RNVC: 2
005663882
47
RNCC: 3 | RNVC: 9
005663889
413238
RNCC: 3 | RNVC: 2
005663888
FAE32030S
RNCC: 3 | RNVC: 2
FAE32030S
RNCC: 5 | RNVC: 9
005663881
4929723G3
RNCC: 3 | RNVC: 9
005655835
AB225AMP
RNCC: 3 | RNVC: 2
005653919
E5401
RNCC: 3 | RNVC: 2
005644266
79-89-5
RNCC: 3 | RNVC: 2
005644268
879-87
RNCC: 3 | RNVC: 2
005644265
Z59A1X1
RNCC: 3 | RNVC: 2
005644264
TYPEF
RNCC: 3 | RNVC: 2
005644261
B16296
RNCC: 3 | RNVC: 9
005644257
60180552P2
RNCC: 3 | RNVC: 9
005643871
P1830
RNCC: 3 | RNVC: 9
005643895
545022
RNCC: 3 | RNVC: 2
005643872
P1839
RNCC: 3 | RNVC: 9
005643880
100-301528E15024
RNCC: 3 | RNVC: 9
005643870
P1829
RNCC: 3 | RNVC: 9
005643850
281086
RNCC: 3 | RNVC: 2
281086
RNCC: 5 | RNVC: 2
005643840
404
RNCC: 3 | RNVC: 9
005643711
383077
RNCC: 3 | RNVC: 2
383077
RNCC: 5 | RNVC: 2
005643712
585623
RNCC: 3 | RNVC: 9
585623
RNCC: 5 | RNVC: 2
005643617
338
RNCC: 3 | RNVC: 9
005643610
48
RNCC: 3 | RNVC: 9
005643500
545278
RNCC: 3 | RNVC: 2
005643499
545348B
RNCC: 3 | RNVC: 2
005643498
6077115G4
RNCC: 3 | RNVC: 9
005643497
683922
RNCC: 3 | RNVC: 2
005642862
ET57086
RNCC: 3 | RNVC: 2
97227PARAGRAPHL
RNCC: 5 | RNVC: 2
S15056REV2PCE
RNCC: 5 | RNVC: 2
005608931
37F82209-15
RNCC: 3 | RNVC: 2