{"title":"45 Amp Circuit Breakers","description":"\u003ch2\u003e45 Amp Circuit Breakers\u003c\/h2\u003e\u003cp\u003eShop 45 amp circuit breakers across leading brands and series. Filter 45A breakers by poles, voltage, series, mounting style, phase, special classification, trip technology, and family.\u003c\/p\u003e\u003cp\u003eMatch amperage, voltage, pole count, series, and mounting style to your equipment before ordering. Need help identifying a replacement? \u003ca href=\"\/pages\/get-a-quote\"\u003eRequest a quote\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"cutler-hammer-bab3045h-45-amp","title":"Eaton \/ Cutler-Hammer BAB3045H - 45A 3 Pole Miniature Circuit Breaker","description":"Engineered to accommodate demanding electrical loads, this 45A three-pole breaker features a high-magnetic trip curve. It is ideal for commercial and industrial circuits that experience significant inrush currents during startup. This unit mounts securely into Eaton Pow-R-Line, Cutler-Hammer, and legacy Westinghouse panelboards. It provides an exact drop-in replacement for older QNBL3045 breakers. Rated for 10kAIC at 240VAC, the HACR-certified design ensures consistent and reliable protection.","brand":"Eaton \/ Cutler-Hammer","offers":[{"title":"New","offer_id":45354172055865,"sku":"BAB3045H","price":171.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/BAB3045H_e3953505-8232-429a-8834-ce5e16a9fe1a.jpg?v=1686677356"},{"product_id":"square-d-egb24045-45-amp","title":"Square D EGB24045 - 45A 2 Pole Miniature Circuit Breaker","description":"Built for commercial and industrial power distribution, the Square D EGB24045 is a 45A, two-pole miniature breaker. It features a robust E-Frame construction and utilizes thermal-magnetic trip technology for reliable protection. This unit installs into Square D NF panelboards using a secure bolt-on mounting style. Rated for 65 kAIC at 240V and 35 kAIC at 480Y\/277V, it provides substantial interrupting capacity.","brand":"Square D","offers":[{"title":"New","offer_id":51149385531705,"sku":"EGB24045","price":391.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/EGB24045-2-Pole-Circuit-Breaker_SquareD_1.jpg?v=1750341126"},{"product_id":"federal-pacific-nc045-45-amp","title":"Federal Pacific NC045 - 45A 1 Pole Miniature Circuit Breaker","description":"Sourced for legacy electrical systems, the 45A Federal Pacific component provides reliable thermal-magnetic protection. It handles standard residential loads requiring a single-pole configuration. This unit installs into original FPE Stab-Lok load centers without requiring aftermarket adapters. It serves as an alternative to the UBIF045N substitute. Featuring a thin half-inch per pole footprint, it maximizes available space while delivering a 10kA interrupting capacity at 120VAC.","brand":"Federal Pacific","offers":[{"title":"New","offer_id":45354875683129,"sku":"NC045","price":31.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/NC045_fab68c25-5ada-4dfe-ab15-97a3078eba4a.jpg?v=1686698130"},{"product_id":"federal-pacific-nc045-r-45-amp","title":"Federal Pacific NC045 - 45A 1 Pole Miniature Circuit Breaker","description":"Built to support older infrastructure, this 45-amp miniature breaker offers essential long-time and instantaneous trip functions. It is tailored for residential applications utilizing 120VAC circuits. The device mounts into classic Federal Pacific Stab-Lok panels, offering a precise match for original hardware. Electricians often use it in place of the UBIF045N cross-reference. Its distinctive wafer-style construction requires only a half-inch of space for high-density configurations.","brand":"Federal Pacific","offers":[{"title":"Re-Certified","offer_id":45354875781433,"sku":"NC045-R","price":19.62,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/nc045_01dec041-fd12-41f8-8b57-94445862a694.jpg?v=1686698143"},{"product_id":"siemens-neb3b045b-45-amp","title":"Siemens NEB3B045B - 45A 3 Pole Molded Case Circuit Breaker","description":"Built for industrial applications, the Siemens NEB3B045B is a 3-pole, 45A thermal-magnetic circuit breaker. It features a non-interchangeable trip unit with fixed long-time and instantaneous protection functions to safeguard commercial electrical systems. Designed for a secure fit, it mounts into Siemens P1, P2, and P3 panelboards via a bolt-on connection. If a replacement is needed, it crosses over to the 3VA4145-5ED34-0AA0 model. This HACR and HID rated breaker handles 35kAIC at 480V.","brand":"Siemens","offers":[{"title":"New","offer_id":45354886168889,"sku":"NEB3B045B","price":1485.0,"currency_code":"USD","in_stock":false},{"title":"Re-Certified","offer_id":50903149805881,"sku":"NEB3B045B-R","price":1085.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/NEB3B045B_1_fca276dc-2687-4a04-a0a5-39f3a1e6d0ce.jpg?v=1686698374"},{"product_id":"general-electric-thhqb2145-45-amp","title":"ABB \/ General Electric THHQB2145 - 45A 2 Pole Miniature Circuit Breaker","description":"Part of the robust Q-Line family, this 45A component offers dependable thermal-magnetic protection. A trip-free mechanism guarantees tripping even if the handle is held ON. Designed for seamless integration, it mounts into GE A-Series panelboards and ReliaGear lighting panels. Standard box lugs accommodate 8-3 AWG conductors. The 22kAIC interrupting capacity provides enhanced fault clearing. An internal common trip disconnects both poles simultaneously during an overload.","brand":"ABB \/ General Electric","offers":[{"title":"New","offer_id":45355492770105,"sku":"THHQB2145","price":66.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/THHQB2145-2-Pole-Circuit-Breaker_GE_1.jpg?v=1750170407"},{"product_id":"siemens-b145-50-amp","title":"Siemens B145 - 45A 1 Pole Molded Case Circuit Breaker","description":"Built for commercial and industrial applications, the Siemens B145 provides reliable thermal-magnetic overcurrent protection. This 45-amp, single-pole molded case circuit breaker delivers a standard 10kAIC interrupting rating at 120\/240VAC. Designed for seamless integration, it installs into Siemens P1, P2, P3, P4, and P5 panelboards via a sturdy bolt-on connection. The HACR-rated unit features a trip-free mechanism, non-interchangeable trip unit, and supports reverse feed configurations.","brand":"Siemens","offers":[{"title":"New","offer_id":45356697387321,"sku":"B145","price":14.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/B145-1-Pole-Circuit-Breaker_Siemens_1.jpg?v=1776353388"},{"product_id":"siemens-b345hh-45-amp","title":"Siemens B345HH - 45A 3 Pole Miniature Circuit Breaker","description":"Built for demanding commercial applications, the B345HH delivers extra-high interrupting capacity. This 3-pole, 45A miniature circuit breaker features thermal-magnetic trip technology for reliable overcurrent protection. The device mounts into Siemens P1 through P5 panelboards using a secure bolt-on connection. It accommodates 8-6 AWG copper or 8-4 AWG aluminum conductors. With a robust 65kAIC rating at 240VAC, this HBL-type breaker safely clears severe short circuits and is HACR rated.","brand":"Siemens","offers":[{"title":"New","offer_id":45356707938617,"sku":"B345HH","price":238.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/B345HH_23fbac9d-c986-4c64-98b7-561bb1be8771.jpg?v=1686725303"},{"product_id":"cutler-hammer-br345-45-amp","title":"Eaton \/ Cutler-Hammer BR345 - 45A 3 Pole Miniature Circuit Breaker","description":"Designed for residential and commercial electrical systems, this 45-amp, three-pole component delivers reliable overcurrent and short-circuit protection. It snaps securely into Eaton Type BR load centers and serves as a suitable replacement for older Cutler-Hammer installations. Featuring a standard 10kAIC rating at 240VAC, the thermal-magnetic trip mechanism ensures consistent performance. Common applications include dedicated equipment circuits requiring a three-phase power supply.","brand":"Eaton \/ Cutler-Hammer","offers":[{"title":"New","offer_id":45356844450105,"sku":"BR345","price":83.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/br345_d7862255-4e54-42bd-8d9b-5fad47d6c40a.jpg?v=1686727543"},{"product_id":"general-electric-ted124045-r-45-amp","title":"ABB \/ General Electric TED124045 - 45A 2 Pole Molded Case Circuit Breaker","description":"Part of the legacy E-frame family, this 45A thermal-magnetic breaker delivers dependable overcurrent and short-circuit defense for commercial facilities. It mounts securely into GE A-Series and Spectra panelboards using a standard bolt-on configuration. While newer installations might utilize the Tmax XT1 series with retrofit kits, this exact replacement maintains original system listings. It features a non-interchangeable trip unit and carries an 18kAIC rating at 480VAC.","brand":"ABB \/ General Electric","offers":[{"title":"Re-Certified","offer_id":45356878299449,"sku":"TED124045-R","price":43.14,"currency_code":"USD","in_stock":false},{"title":"New","offer_id":50020940644665,"sku":"TED124045","price":362.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/ted124045_6d5f7728-ae91-4464-a09a-08444c409c80.jpg?v=1686728787"},{"product_id":"general-electric-ted134045-3-pole-circuit-breaker","title":"ABB \/ General Electric TED134045 - 45A 3 Pole Molded Case Circuit Breaker","description":"Designed for heavy-duty commercial distribution, the GE TED134045 delivers 45A of thermal-magnetic protection. It utilizes fixed long-time and instantaneous trip functions to prevent overloads. The bolt-on mounting style ensures a secure connection within GE A-Series and Spectra panelboards. This legacy E-Frame component is eventually replaced by the TEYD3045B series. Delivering an 18kA interrupting rating at 480VAC, it is HACR rated and supports reverse feed applications.","brand":"ABB \/ General Electric","offers":[{"title":"New","offer_id":45356879774009,"sku":"TED134045","price":693.1,"currency_code":"USD","in_stock":true},{"title":"Re-Certified","offer_id":45356879806777,"sku":"TED134045-R","price":224.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/TED134015-3-Pole-Circuit-Breaker_General-Electric_1_bdc47e2f-a441-4ed0-be3d-055831277d8a.jpg?v=1755008873"},{"product_id":"general-electric-tey345-3-pole-circuit-breaker","title":"ABB \/ General Electric TEY345 - 45A 3 Pole Miniature Circuit Breaker","description":"Built for robust commercial and industrial use, the GE TEY345 is a 3-pole, 45A miniature circuit breaker from the proven Q-Line family. It provides essential long-time and instantaneous protection for 3-phase electrical systems. This breaker is engineered to mount into GE A-Series, AE, and AS lighting panelboards. The bolt-on design ensures a stable connection. With an interrupting capacity of 14kAIC at 480Y\/277VAC, it features a non-interchangeable trip and is UL listed for HID applications.","brand":"ABB \/ General Electric","offers":[{"title":"New","offer_id":45356881772857,"sku":"TEY345","price":254.8,"currency_code":"USD","in_stock":true},{"title":"Re-Certified","offer_id":45356881805625,"sku":"TEY345-R","price":156.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/TEY345-3-Pole-Circuit-Breaker_General-Electric_1.jpg?v=1762273847"},{"product_id":"general-electric-thed136045-r-45-amp","title":"ABB \/ General Electric THED136045 - 45A 3 Pole Molded Case Circuit Breaker","description":"Part of the GE E-Frame lineup, this 45A molded case circuit breaker delivers robust overcurrent protection for commercial and industrial systems. It features a fixed thermal-magnetic trip unit with long-time and instantaneous functions. Designed for bolt-on installation, this 3-pole breaker integrates into GE A-Series and Spectra Series panelboards. It serves as an exact drop-in replacement for older TED136045 models.","brand":"ABB \/ General Electric","offers":[{"title":"Re-Certified","offer_id":45356911853881,"sku":"THED136045-R","price":441.81,"currency_code":"USD","in_stock":false},{"title":"New","offer_id":47801912557881,"sku":"THED136045","price":881.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/THED136045-3-Pole-Circuit-Breaker_General-Electric_1.jpg?v=1767121193"},{"product_id":"square-d-edb24045-45-amp","title":"Square D EDB24045 - 45A 2 Pole Miniature Circuit Breaker","description":"Engineered for commercial electrical systems, the Square D EDB24045 delivers robust thermal-magnetic protection. This 45-amp, two-pole component is part of the E-Frame family. It mounts seamlessly into Square D NF series panelboards using a secure bolt-on connection, serving as an exact replacement for discontinued EHB24045 models. Rated for 25kA interrupting capacity at 240VAC, it includes Visi-Trip technology for rapid fault identification and is HACR rated for HVAC loads.","brand":"Square D","offers":[{"title":"New","offer_id":45356965036345,"sku":"EDB24045","price":290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/EDB24045-2-Pole-Circuit-Breaker_SquareD_1.jpg?v=1750193365"},{"product_id":"square-d-ehb34045-r-45-amp","title":"Square D EHB34045 - 45A 3 Pole Molded Case Circuit Breaker","description":"Built specifically for commercial power distribution, this 45-amp device handles demanding three-phase loads. It mounts into legacy Square D NEHB panelboards, serving as a critical maintenance component for facilities that have not yet transitioned to modern NF enclosures. The unit provides robust fault clearing with a 65kA interrupting capacity at 240VAC. Operators benefit from the built-in Visi-Trip visual indicator, which simplifies troubleshooting by clearly identifying tripped circuits.","brand":"Square D","offers":[{"title":"Re-Certified","offer_id":45356992725305,"sku":"EHB34045-R","price":1392.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/EHB34045-3-Pole-Molded-Case-Circuit-Breaker_Square-D_1.jpg?v=1775661020"},{"product_id":"square-d-fal32045-45-amp","title":"Square D FAL32045 - 45A 3 Pole Molded Case Circuit Breaker","description":"Engineered for commercial and industrial applications, this 45A molded case circuit breaker provides reliable long-time and instantaneous (LI) protection. The unit mount design features lugs on both ends for installation into Square D enclosures, switchboards, and control panels. While this F-Frame model is a legacy component, it serves as an exact replacement for older systems before upgrading to the modern PowerPacT B-Frame (BDL36045). It includes the Visi-Trip indicator for fast diagnostics.","brand":"Square D","offers":[{"title":"New","offer_id":45357040468281,"sku":"FAL32045","price":638.0,"currency_code":"USD","in_stock":false},{"title":"Re-Certified","offer_id":50338080850233,"sku":"FAL32045-R","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/FAL36045-3-Pole-Circuit-Breaker_SquareD_1_742f039b-541c-4187-a376-1d5bc660139c.jpg?v=1767800904"},{"product_id":"square-d-fal34045-3-pole-circuit-breaker","title":"Square D FAL34045 - 45A 3 Pole Molded Case Circuit Breaker","description":"Belonging to Square D's legacy F-frame lineup, the FAL34045 provides 3-pole, 45A molded case circuit protection. Built for commercial power distribution, it delivers dependable thermal-magnetic (LI) protection against overloads and short circuits. This unit mount breaker installs into compatible Square D enclosures and switchboards. It includes factory-installed lugs and is replaced by the BDL36045 for modern upgrades.","brand":"Square D","offers":[{"title":"New","offer_id":45357259489593,"sku":"FAL34045","price":870.0,"currency_code":"USD","in_stock":true},{"title":"Re-Certified","offer_id":45357259587897,"sku":"FAL34045-R","price":284.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/FAL34015-3-Pole-Circuit-Breaker_SquareD_1_9a95ed82-9c2f-4c37-ab62-8e5727a0a4b0.jpg?v=1764865079"},{"product_id":"siemens-hhed62b045l-45-amp","title":"Siemens HHED62B045L - 45A 2 Pole Molded Case Circuit Breaker","description":"Built for industrial applications, the HHED62B045L is a 2-pole, 45A molded case circuit breaker from Siemens. It provides reliable long-time and instantaneous (LI) thermal-magnetic trip protection for demanding electrical systems. This unit-mount breaker installs into standard enclosures and motor control centers. It includes both line and load lugs (indicated by the 'L' suffix) and is replaced by the 3VA5145-6EC21-0AA0. As an HHED6 type, it offers extra high interrupting capacity.","brand":"Siemens","offers":[{"title":"New","offer_id":45357465895225,"sku":"HHED62B045L","price":569.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/products\/hhed62b045_5d1aeb5d-0215-4a4b-9eb7-fdace110c3a0.jpg?v=1686736639"},{"product_id":"square-d-fhl36045-45-amp","title":"Square D FHL36045 - 45A 3 Pole Molded Case Circuit Breaker","description":"Part of Square D's legacy F-Frame series, the FHL36045 serves as a 3-pole, 45A MCCB for industrial distribution. It delivers reliable long-time and instantaneous (LI) thermal-magnetic protection against overcurrents. This unit-mount breaker installs into Square D enclosures and switchboards. When upgrading, it crosses over to the PowerPact HGL36045 (retrofit kit required). Rated 25kAIC at 480VAC, it handles demanding fault currents and includes an HACR rating for HVAC applications.","brand":"Square D","offers":[{"title":"New","offer_id":45357592314169,"sku":"FHL36045","price":1160.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/FAL36045-3-Pole-Circuit-Breaker_SquareD_1_5e9fcd7c-19d8-4a57-9368-980fec3d3bf6.jpg?v=1767804694"},{"product_id":"square-d-qo145-r","title":"Square D QO145 - 45A 1 Pole Miniature Circuit Breaker","description":"Manufactured for dependable power distribution, this 45A miniature breaker utilizes a proven thermal-magnetic trip unit to prevent overloads and short circuits. The highly visible red Visi-Trip flag alerts users instantly when the circuit trips, reducing troubleshooting time. It easily installs into any standard QO load center, as well as commercial NQ and NQOD panelboards. The plug-on connection ensures a tight, secure fit. It is HACR rated for use with heating and cooling equipment.","brand":"Square D","offers":[{"title":"Re-Certified","offer_id":45357643202873,"sku":"QO145-R","price":5.29,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/QO145-1-Pole-Circuit-Breaker_SquareD_1.jpg?v=1773838327"},{"product_id":"general-electric-thqb32045-3-pole-circuit-breaker","title":"ABB \/ General Electric THQB32045 - 45A 3 Pole Miniature Circuit Breaker","description":"Built for heavy-duty commercial and industrial environments, this 45-amp miniature circuit breaker ensures consistent electrical safety. It fastens firmly into GE A-Series panelboards, AQ lighting panels, and ReliaGear RQ enclosures using a secure bolt-on mounting method. The non-interchangeable thermal-magnetic trip unit features quick-make\/quick-break mechanisms to minimize arcing. This HACR-rated component provides a standard 10kA interrupting capacity at 240VAC.","brand":"ABB \/ General Electric","offers":[{"title":"New","offer_id":45357644874041,"sku":"THQB32045","price":106.4,"currency_code":"USD","in_stock":true},{"title":"Re-Certified","offer_id":45357644906809,"sku":"THQB32045-R","price":41.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/THQB32045-3-Pole-Circuit-Breaker_General-Electric_1.jpg?v=1773235662"},{"product_id":"siemens-mp245-45-amp","title":"Siemens MP245 - 45A 2 Pole Miniature Circuit Breaker","description":"Engineered to streamline installation, this 45-amp, two-pole miniature circuit breaker provides robust thermal-magnetic protection. It handles residential branch circuits requiring a specific 45A rating. This breaker mounts into Murray and Siemens plug-on load centers. 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Rated 35kAIC at 480V, it is HACR and HID rated for specialized applications.","brand":"Siemens","offers":[{"title":"New","offer_id":45357695500601,"sku":"NEB2B045B","price":501.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/NEB2B045B_1.jpg?v=1791474547"},{"product_id":"siemens-ngb3b045b-45-amp","title":"Siemens NGB3B045B - 45A 3 Pole Molded Case Circuit Breaker","description":"Operating at up to 600Y\/347VAC, the Siemens NGB3B045B is a 3-pole, 45A molded case circuit breaker. It provides essential LI protection for commercial electrical systems. This SENTRON series breaker bolts into Siemens P1, P2, P3, P4, and P5 panelboards. It features a trip-free mechanism, is HACR rated, and accepts standard lug connections. Offering 100kAIC at 240VAC, it delivers high-performance fault clearing. It is replaced by 3VA5145-4ED36-0AA0 (requires kit for P1-P3 panels).","brand":"Siemens","offers":[{"title":"New","offer_id":45357699825977,"sku":"NGB3B045B","price":334.6,"currency_code":"USD","in_stock":true},{"title":"Re-Certified","offer_id":50353705320761,"sku":"NGB3B045B-R","price":290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/6978\/0537\/files\/NGB3B045B-3-Pole-Circuit-Breaker_Siemens_1.jpg?v=1750188466"},{"product_id":"general-electric-thqb1145-45-amp","title":"ABB \/ General Electric THQB1145 - 45A 1 Pole Miniature Circuit Breaker","description":"Providing reliable thermal-magnetic protection, the GE THQB1145 is a 1-pole, 45A miniature breaker from the Q-Line family. It features a quick-make, quick-break mechanism for safe operation. This breaker bolts into GE A-Series panelboards and AQ lighting panels, and is suitable for reverse feed applications to offer flexibility in complex configurations. 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