Circuit Breaker Bases & Accessories

Circuit breaker bases and accessories are essential components used to mount, support, and enhance circuit breakers in industrial, commercial, and utility power distribution systems. Breaker bases provide the mechanical structure and electrical interface required to securely install breakers into panels, enclosures, switchgear, and motor control assemblies. Accessories expand breaker functionality by enabling control, monitoring, protection, and remote operation features.

Breaker bases simplify installation by providing standardized or adjustable mounting points that eliminate the need for custom panel fabrication or costly equipment modifications. They help ensure proper alignment, reliable electrical connections, and safe integration into panelboards, switchgear lineups, motor control centers, and OEM-built equipment. These bases are especially valuable in applications where system reliability and serviceability are critical.

Circuit breaker accessories include auxiliary and alarm contacts, shunt trip and undervoltage release devices, motor operators, mechanical interlocks, padlocking hardware, and control interfaces. These add-on components allow breakers to provide status indication, remote tripping, fail-safe operation, and restricted access when required. Properly selected bases and accessories improve safety, support compliance with electrical codes and standards, and allow power systems to be customized for specific operational and emergency shutdown requirements.

Found 7397 items
Normally In Stock
Phoenix Contact 2801305 Base element CB 1/10-1/10 UT-BE
Free U.S Ground shipping
$20.12
$16.77
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Schneider Electric HOML2225 - Lug Kit
Free U.S Ground shipping
$183.44
$152.87
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Eaton BRPHDGENBR Hold-Down Kit
Free U.S Ground shipping
$26.83
$22.36
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Eaton HTBGD2P Hardware
Free U.S Ground shipping
$5.72
$4.77
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Eaton PDG2XPLKT Padlock Hasp
Free U.S Ground shipping
$43.56
$36.30
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Schneider Electric HOMC40UCW - Cover
Free U.S Ground shipping
$107.22
$89.35
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Eaton PDGXAC Auxiliary Switch
Free U.S Ground shipping
$160.07
$133.39
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Eaton PDG3X3TA630 - Terminal - 3 Frame, 3P, 600 Amp, 600 VAC
Free U.S Ground shipping
$116.14
$96.78
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Phoenix Contact 2907991 Wiring bridge TMC 8 B1 80 57 C
Free U.S Ground shipping
$167.62
$139.68
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Schneider Electric QOC30U125C - Cover
Free U.S Ground shipping
$62.69
$52.24
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Schneider Electric QOC42UFW - Cover
Free U.S Ground shipping
$197.75
$164.79
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Eaton QL3HT Handle Mechanism
Free U.S Ground shipping
$5.51
$4.59
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Eaton MP2056NWLK Meter Stack Endwall
Free U.S Ground shipping
$649.97
$541.64
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Eaton PDG3X3TA402 - Terminal - 3 Frame, 3P, 400 Amp
Free U.S Ground shipping
$85.50
$71.25
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Schneider Electric HOMC24UCW - Cover
Free U.S Ground shipping
$91.61
$76.34
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Schneider Electric HOMC30UCW - Cover
Free U.S Ground shipping
$97.45
$81.21
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Schneider Electric QOUMF3B QOU Circuit Breaker Mounting Foot, 3P, Bulk
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$2.27
$1.89
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Eaton HTBGD3P Hardware
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$4.21
$3.51
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Eaton QC6BP Mounting Accessories
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$16.43
$13.69
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Eaton PDG3X3TA400 - Terminal - 3 Frame, 400 Amp
Free U.S Ground shipping
$85.50
$71.25
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Eaton PDGXDC Auxiliary Switch
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$204.56
$170.47
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Eaton PDG2X3TA225K Terminal
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$164.45
$137.04
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Eaton PDG5X1TA1201 - Terminal - 5 Frame, 1200 Amp
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$106.90
$89.08
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Schneider Electric SCTKP30 - Tunnel Kit
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$38.11
$31.76
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Schneider Electric SCTKP20 - Tunnel Kit
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$52.09
$43.41
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Schneider Electric RSG4 - Plate
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$73.57
$61.31
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Schneider Electric EZM125QOA - Adapter
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$126.00
$105.00
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Eaton 3TA125EF Line And Load Terminal
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$7.62
$6.35
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Eaton HEXLG Handle Mechanism
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$64.06
$53.38
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Schneider Electric QOU2DTILA QOU Circuit Breaker Mechanical Interlock
Free U.S Ground shipping
$37.67
$31.39
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Phoenix Contact 2907992 Wiring bridge TMC 8 B1 80 37 CA
Free U.S Ground shipping
$120.72
$100.60
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Phoenix Contact 1022238 Wiring bridge TMC 7 B1 80 57 C
Free U.S Ground shipping
$44.82
$37.35
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Eaton BRPHD2 Hold-Down Kit
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$24.40
$20.33
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Eaton TA250FJ Terminal
Free U.S Ground shipping
$33.38
$27.82
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Eaton PDG2XPLKTOFF Padlock Hasp
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$43.56
$36.30
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Eaton PDG4X1TA800 - Terminal - 4 Frame, 800 Amp
Free U.S Ground shipping
$67.43
$56.19
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Eaton PDG4X3TA800 - Terminal - 4 Frame, 3P, 800 Amp, 600 VAC
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$211.45
$176.21
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Schneider Electric PK5RK - Bracket Kit
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$25.44
$21.20
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Schneider Electric S106 - Screws
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$4.61
$3.84
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Schneider Electric QO1FP - Cover
Free U.S Ground shipping
$8.28
$6.90
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Schneider Electric QOUEC QOU Circuit Breaker Quick Connector Wiring
Free U.S Ground shipping
$9.86
$8.22
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Schneider Electric QOULFSC1 QOU Circuit Breaker Finger Save Cover, High A
Free U.S Ground shipping
$4.84
$4.03
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Phoenix Contact 1110991 Busbar CAPAROC CR EXT4
Free U.S Ground shipping
$9.92
$8.27
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Schneider Electric S48907 7 PIN TEST CABLE FOR TEST KIT
Free U.S Ground shipping
$2320.37
$1933.64
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Phoenix Contact 1115672 Busbar CAPAROC CR 8
Free U.S Ground shipping
$18.90
$15.75
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Eaton 6648C22G01 Handle Mechanism
Free U.S Ground shipping
$93.86
$78.22
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Eaton 3TA632LK Line And Load Terminal
Free U.S Ground shipping
$212.94
$177.45

FAQs

Q: What are circuit breaker bases used for?
Circuit breaker bases are used to securely mount and electrically connect circuit breakers within panels, switchgear, and electrical enclosures, ensuring proper alignment, support, and safe operation.

Q: What types of accessories are available for circuit breakers?
Common accessories include auxiliary and alarm contacts, shunt trip devices, undervoltage releases, motor operators, handle extensions, locking mechanisms, mechanical interlocks, and communication or monitoring modules.

Q: Why are circuit breaker accessories important?
Accessories enhance breaker functionality by enabling remote control, system monitoring, alarm indication, and added safety features. They are often required to meet code, safety, or automation requirements.

Q: How do I choose the correct breaker base or accessory?
Selection depends on the specific breaker model and frame size, voltage and current ratings, mounting configuration, and required functions such as remote tripping or status feedback. Compatibility with the breaker is critical.

Q: Are circuit breaker bases and accessories used in industrial applications?
Yes, they are widely used in industrial facilities, commercial buildings, utilities, and OEM equipment where reliable power distribution, safety compliance, and system control are essential.

Why Buy Circuit Breaker Bases & Accessories from RSP Supply

RSP Supply offers a broad selection of circuit breaker bases and accessories from trusted manufacturers, including ABB, Benshaw, Eaton, IDEC, Killark, Phoenix Contact, Schneider Electric, and Square D. Our inventory supports a wide range of breaker styles and power distribution applications, helping customers configure safe, reliable, and code-compliant electrical systems. Customers rely on RSP Supply for knowledgeable product support, dependable sourcing, and industrial-grade power distribution components.