E43B045 - 45Amp Circuit Breaker
- 45 Amp
- 18k @ 480VAC; 25k @ 240VAC
- 3 Pole
Purchase Options: New Surplus
E43B045 - 45Amp Circuit Breaker Description
E43B045 - 45 Amp Circuit Breaker
The E43B045 molded case circuit breaker is a 45-amp, 3-pole breaker designed for use in electrical distribution systems that require dependable overcurrent protection and compatibility with existing equipment built around the E43 frame type. Rated for 18kA interrupting capacity at 480VAC and 25kA at 240VAC, this breaker helps protect conductors and connected equipment from overloads and short circuits in commercial and industrial installations. The bolt-on mounting configuration allows for secure installation in compatible panelboards and switchboards, while the included load-side terminals simplify conductor connections during replacement or maintenance work. Built to handle standard operating conditions up to 40°C, the E43B045 is also HACR rated, making it suitable for heating, air conditioning, and refrigeration equipment circuits where these ratings are required. With a durable molded case construction and a form-fit design aligned with E43 frame systems, this breaker provides a straightforward functional replacement for maintaining legacy electrical infrastructure.
Key Features and Benefits
- 45 Amp continuous rating: suitable for branch circuit protection in commercial and industrial systems
- 3-pole configuration: designed for three-phase electrical distribution
- Bolt-on mounting design: provides a secure connection within compatible panelboards
- Interrupting capacity: 18kA at 480VAC and 25kA at 240VAC for handling fault conditions
- HACR rated: for circuits serving heating, air conditioning, and refrigeration equipment
- Includes load-side terminals: to assist with installation and conductor termination
- Molded case construction: built to last and intended for dependable operation in existing systems
- Form, fit, and functional compatibility: with equipment designed for the E43 frame type
Technical Specifications
- Part Number: E43B045
- Amperage Rating: 45 Amps
- Poles: 3
- Frame Type: E43
- Interrupting Rating: 18kA @ 480VAC; 25kA @ 240VAC
- Mounting Type: Bolt-On
- Temperature Rating: 40°C
- HACR Rating: Yes
- Terminals: Includes Load-Side Terminals
- Approximate Weight: 3.0 lbs
- Approximate Height: 6.35 in
Material Compliance and Certifications
- Industry Construction and Safety Expectations: The E43B045 molded case circuit breaker is manufactured to align with common industry construction and safety expectations for molded case circuit breakers used in commercial and industrial electrical distribution equipment.
- HACR Certification: The breaker includes HACR certification, indicating suitability for heating, air conditioning, and refrigeration circuit applications where this designation is required.
- Electrical Safety Standards: Molded case circuit breakers of this type are typically designed in accordance with UL and applicable electrical safety standards used across North American electrical systems.
Where It Works Best
- Commercial buildings and office facilities
- Manufacturing and light industrial electrical panels
- HVAC distribution circuits requiring HACR-rated protection
- Electrical maintenance or service work involving legacy panelboards
- Replacement of existing breakers where E43 frame compatibility is required
The E43B045 45A 3-pole circuit breaker is commonly used in facilities that operate three-phase electrical distribution systems, especially where panelboards or switchboards are designed for the E43 frame platform. This breaker is intended to provide form, fit, and functional replacement in compatible systems, helping maintain continuity in established electrical infrastructure without altering the original equipment configuration.
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
Specifications
- Width:3.0
- Height:6.35
- Depth:3.92
- Poles:3
- Amperes:45
- A.I.C. Rating & Volts:18k @ 480VAC; 25k @ 240VAC
- Type:E43
- Approx Dimensions:3.00"W x 6.35"L x 3.92"D
- Additional Notes:40°C, HACR rated, Molded Case Circuit Breaker. Bolt-On. Includes load-side terminals.
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