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Circuit Breaker Bases & Accessories

Circuit breaker accessories can significantly enhance the functionality, safety, and efficiency of circuit breakers. These accessories are often added to the basic breaker to offer specialized features. For example, auxiliary contacts can be integrated into the circuit breaker system to provide additional control functions. An auxiliary contact is ideal for signaling the circuit's status to control panels or other equipment.

Shunt trips are another category of accessories. They are used to remotely trip the breaker from a distant location, enabling better control over electrical systems. This can be particularly beneficial in emergency situations where immediate disconnection of the circuit is necessary.

A door interlock can serve as a safety feature, ensuring that the circuit breaker panel door can't be opened unless the breaker is in the 'off' position. This helps to protect individuals from accidental contact with live parts inside the panel.

Found 9341 items
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Found 9341 items
Manufacturer
ABB (2150)
Benshaw (43)
Eaton (5428)
IDEC (11)
Killark (11)
Lovato (114)
Phoenix Contact (72)
Schneider Electric (1429)
Square D (1429)
Component
Accessory Kit (1)
Actuator (1)
Adapter (71)
Adapter Connector (4)
Adapter Kit (16)
Alarm Switch (40)
Ammeter Kit (2)
Arc Guard System (38)
Aup Box (2)
Automatic Molded Case Switch (1)
Breaker Amperage Rating
100-225 Amp (2)
16 Amp (1)
80 Amp (12)
Sub Component
Adapter (3)
Alarm Switch (1)
Application Module (1)
Automatic Molded Case Switch (3)
Auxiliary Connector (1)
Auxiliary Gutter (2)
Auxiliary Switch (3)
Base (3)
Battery (1)
Bonding Screw (2)
Sub-Component
Handle (2)
Handle Tie (2)
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Padlock Assembly (12)
Terminal Block (1)
Breaker Number of Poles
Single Pole (9)
Two Pole (9)
Three Pole (9)
Four Pole (3)
Six Pole (1)
Line
QO (4)
QOU (29)
QQ (2)
Breaker Mount Type
Din Rail (5)
Plug-In (3)
Amperage (Molded Case Breaker)
0-160 Amp (2)
0-250 Amp (4)
0-630 Amp (1)
10 Amp (1)
100 Amp (10)
1000 Amp (5)
100-200 Amp (1)
100-225 Amp (2)
11 Amp (1)
120 Amp (1)
Breaker Jumper Color
Red (1)
Breaker Jumper Positions
37 Positions (2)
46 Positions (2)
48 Positions (2)
56 Positions (2)
57 Positions (4)
8 Positions (1)
Breaker Voltage Rating
1000 VAC (2)
1000 VDC (2)
12 VDC (7)
24 VDC (4)
277 VAC (11)
480 VAC (23)
600 VAC (10)
600 VDC (8)
690 VAC (10)
Frame Type (Molded Case Breaker)
2 Frame (6)
3 (3)
3 Frame (461)
4 Frame (184)
5 (3)
5 Frame (248)
6 (4)
6 Frame (35)
A1 (19)
A2 (18)
Interrupt Code (Molded Case Breaker)
G Interrupt Rating (1)
K Interrupt Rating (1)
L Interrupt Rating (2)
Interrupt Rating (Molded Case Breaker)
150 Ka (1)
18 Ka 480 Volt (1)
25 Ka (1)
35 Ka 600 Volt (17)
65 Ka (6)
65 Ka 240 Volt (17)
Maximum Voltage (Molded Case Breaker)
100-130 VAC (2)
100-130 VDC (1)
1100 VAC (2)
110-125 VDC (1)
110-130 VAC (12)
110-240 VAC (1)
12 VDC (10)
120 VAC (4)
125 VDC (13)
125-250 VAC (2)
Mounting (Molded Case Breaker)
Bolt-On (2)
By Screws (6)
Clip-On (17)
Compression (9)
Downstream (1)
External (2)
Fixed (11)
Flange Rod Variable Depth (1)
Front (2)
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Poles (Molded Case Breaker)
Eight Pole (1)
Four Pole (363)
Single Pole (17)
Three Pole (475)
Two Pole (67)
Resettable Fuse Type
CB TM Breakers (2)
UL Listing (Molded Case Breaker)
IEC (4)
UL (20)
UL 1449 (4)
UL 489 (855)
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Phoenix Contact 2801305 Base element CB 1/10-1/10 UT-BE
Free U.S Ground shipping
$22.99
$19.16
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Schneider Electric HOML2225 - Lug Kit
Free U.S Ground shipping
$420.70
$350.58
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Eaton BRPHDGENBR Hold-Down Kit
Free U.S Ground shipping
$17.71
$14.76
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Eaton PDGXAC Auxiliary Switch
Free U.S Ground shipping
$146.47
$122.06
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Eaton PDG2XPLKT Padlock Hasp
Free U.S Ground shipping
$46.82
$39.02
Normally In Stock
Eaton HTBGD2P Hardware
Free U.S Ground shipping
$5.80
$4.83
Normally In Stock
Eaton PDG3X3TA630 - Terminal - 3 Frame, 3P, 600 Amp, 600 VAC
Free U.S Ground shipping
$125.42
$104.52
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Schneider Electric HOMC40UCW - Cover
Free U.S Ground shipping
$107.22
$89.35
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Eaton QL3HT Handle Mechanism
Free U.S Ground shipping
$5.94
$4.95
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Eaton QC6BP Mounting Accessories
Free U.S Ground shipping
$17.74
$14.78
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Eaton MP2056NWLK Meter Stack Endwall
Free U.S Ground shipping
$597.24
$497.70
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Eaton PDG2X3TA225K Terminal
Free U.S Ground shipping
$159.73
$133.11
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Eaton HTBGD3P Hardware
Free U.S Ground shipping
$3.74
$3.12
Normally In Stock
Schneider Electric QOUMF3B QOU Circuit Breaker Mounting Foot, 3P, Bulk
Free U.S Ground shipping
$3.05
$2.54
Normally In Stock
Schneider Electric SCTKP20 - Tunnel Kit
Free U.S Ground shipping
$30.88
$25.73
Normally In Stock
Schneider Electric RSG4 - Plate
Free U.S Ground shipping
$73.57
$61.31
Normally In Stock
Eaton PDG5X1TA1201 - Terminal - 5 Frame, 1200 Amp
Free U.S Ground shipping
$103.85
$86.54
Normally In Stock
Eaton PDG4X3TA800 - Terminal - 4 Frame, 3P, 800 Amp, 600 VAC
Free U.S Ground shipping
$194.86
$162.38
Normally In Stock
Eaton PDG3X3TA402 - Terminal - 3 Frame, 3P, 400 Amp
Free U.S Ground shipping
$83.05
$69.21
Normally In Stock
Schneider Electric HOMC30UCW - Cover
Free U.S Ground shipping
$97.45
$81.21
Normally In Stock
Schneider Electric QOC42UFW - Cover
Free U.S Ground shipping
$102.58
$85.48
Normally In Stock
Schneider Electric QOU2DTILA QOU Circuit Breaker Mechanical Interlock
Free U.S Ground shipping
$34.50
$28.75
Normally In Stock
Phoenix Contact 1022238 Wiring bridge TMC 7 B1 80 57 C
Free U.S Ground shipping
$53.51
$44.59
Normally In Stock
Phoenix Contact 2907991 Wiring bridge TMC 8 B1 80 57 C
Free U.S Ground shipping
$157.25
$131.04
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Eaton 3TA125EF Line And Load Terminal
Free U.S Ground shipping
$12.62
$10.52
Normally In Stock
Eaton PDGXDC Auxiliary Switch
Free U.S Ground shipping
$159.35
$132.79
Normally In Stock
Eaton TA250FJ Terminal
Free U.S Ground shipping
$26.47
$22.06
Normally In Stock
ABB KXT1CUAL1-3PC - Terminal
Free U.S Ground shipping
$20.45
$17.04
Normally In Stock
ABB KXT7CUAL3X750KC-3 - Terminal
Free U.S Ground shipping
$404.12
$336.77
Normally In Stock
ABB KXTCPLLOPCL - Padlock Device
Free U.S Ground shipping
$25.10
$20.92
Normally In Stock
ABB KXTBPLLOP - Padlock Device
Free U.S Ground shipping
$25.10
$20.92
Normally In Stock
ABB KXT6CUAL2X500K-3PC - Terminal
Free U.S Ground shipping
$229.03
$190.86
Normally In Stock
Eaton CHMLCS Interlock
Free U.S Ground shipping
$52.63
$43.86
Normally In Stock
Eaton PDG2XPLKTOFF Padlock Hasp
Free U.S Ground shipping
$39.95
$33.29
Normally In Stock
Eaton 3TA632LK Line And Load Terminal
Free U.S Ground shipping
$204.29
$170.24
Normally In Stock
Eaton A4X6RPK Auxiliary Switch
Free U.S Ground shipping
$1189.61
$991.34
Normally In Stock
Eaton HLK6OFF Handle Mechanism
Free U.S Ground shipping
$127.80
$106.50
Normally In Stock
Eaton KPEK4 End Cap Kit
Free U.S Ground shipping
$130.86
$109.05
Normally In Stock
Phoenix Contact 2907992 Wiring bridge TMC 8 B1 80 37 CA
Free U.S Ground shipping
$144.14
$120.12
Normally In Stock
Schneider Electric QOUEC QOU Circuit Breaker Quick Connector Wiring
Free U.S Ground shipping
$9.86
$8.22
Normally In Stock
Schneider Electric QOULFSC1 QOU Circuit Breaker Finger Save Cover, High A
Free U.S Ground shipping
$4.87
$4.06
Normally In Stock
Schneider Electric QOC32UF - Cover
Free U.S Ground shipping
$31.69
$26.41
Normally In Stock
Schneider Electric HOMC24UCW - Cover
Free U.S Ground shipping
$91.61
$76.34
Normally In Stock
Schneider Electric QOC30U125C - Cover
Free U.S Ground shipping
$30.94
$25.78
Normally In Stock
Schneider Electric QOC24UF - Cover
Free U.S Ground shipping
$39.65
$33.04
Normally In Stock
Eaton PDG4XTFA30400 - Trip Unit - 4 Frame, 3P, 400 Amp, 600 VAC
Free U.S Ground shipping
$864.52
$720.43
Normally In Stock
Schneider Electric EZMSCAP - Bus End Cap
Free U.S Ground shipping
$38.27
$31.89

More Information about Circuit Breaker Accessories

The choice of accessories often depends on the type and series of the circuit breaker. For instance, certain accessories may be designed to fit with specific series like the QO series, G series, or C series. Knowing the frame of your circuit breaker can help determine which accessories are compatible. For example, an F frame accessory is designed to fit with circuit breakers having an F frame.

Installation of these accessories usually requires specialized tools and should ideally be done by professionals to ensure proper fit and function. Once installed, these devices can increase the capabilities of circuit breakers in various applications, making them more versatile and effective in protecting electrical systems. Whether you need to upgrade existing breakers or are installing new circuit breakers, choosing the right accessories can enhance system reliability and operational control.

FAQs

What are auxiliary contacts used for?

Auxiliary contacts are used for a variety of control and signaling functions in a circuit breaker setup. They are separate from the main contacts that carry the load current and are primarily used to provide information about the status of the circuit breaker.

Can miniature circuit breakers utilize signal contacts?

Yes, some miniature circuit breakers can be equipped with signal contacts, which are a type of auxiliary contact designed specifically for signaling purposes. These signal contacts do not carry the main load current but are used for control and monitoring applications.

Breakers vs Fuses

Fuses

Fuses are safety devices that are intended to provide protection to both equipment and people in the event of a power surge or an overcurrent situation. A fuse can provide this protection by using a small piece of wire that is sacrificial, and is intended to burn up when too much current is passed through it. When this happens, the fuse eliminates the flow of electricity in that circuit until it is replaced. The size and type of wire that is used in the fuse will dictate how much current can pass through that individual fuse. So the main thing to remember is, when a fuse blows, it must be replaced and cannot be reused. 

Circuit Breakers

Circuit breakers are intended to be reused after they are “tripped” during a power surge or an overcurrent situation. Much like fuses, circuit breakers are designed to trip at a certain current level. This is intended to protect both equipment and anyone in the area of that particular circuit. Circuit breakers can be found in just about any variation from single phase, low current applications to three phase, and high current applications.

As a general rule: fuses are more simplistic and reliable. They cost less initially and are better suited for individual circuit protection. However, they can create more cost over time with each use and may create hazards due to the exposed connection points. Whereas circuit breakers offer better branch circuit protection and do not need to be replaced after each use. They are more expensive initially and, because of their complexity, are more prone to failure over time.