MP340 - 40 Amp Circuit Breaker Description
MP340 - 40 Amp Circuit Breaker
Finding the right replacement for your circuit breaker starts with matching the key details. The MP340 40 Amp 3-Pole Circuit Breaker is an MP-frame, plug-in circuit breaker designed for use in electrical panels that specifically approve this model. With a 40-amp current rating, three-pole configuration, and thermal-magnetic trip mechanism, the MP340 provides overload and short-circuit protection within its specified electrical ratings. Its 10kA interrupting capacity at 240VAC is an essential specification when evaluating the breaker for an existing electrical installation.
The MP340 uses a thermal-magnetic trip mechanism to respond to two different electrical conditions. Its thermal element responds to sustained overloads, while its magnetic element responds to short-circuit conditions. This combination provides the circuit protection the breaker's design specifies. The MP340 is also HACR rated, making that designation relevant when evaluating applicable heating, air conditioning, and refrigeration circuits. A 40°C temperature rating further defines the conditions associated with its stated specifications.
Key Features and Benefits
- 40 Amp Circuit Protection
- 3-Pole Configuration
- Thermal-Magnetic Trip Mechanism
- 10kA Interrupting Capacity at 240VAC
- Plug-In Mounting
- MP Frame Type
- 40°C Temperature Rating
- Defined Replacement Dimensions
- Form, Fit, and Functional Replacement
Technical Specifications
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Part Number: MP340
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Product Type: Circuit Breaker
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Amperage: 40 Amps
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Number of Poles: 3
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Frame Type: MP
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A.I.C. Rating: 10kA
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Voltage Associated With A.I.C. Rating: 240VAC
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Interrupting Capacity: 10,000 Amps at 240VAC
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Mounting Type: Plug-In
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Trip Mechanism: Thermal-Magnetic
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HACR Rated: Yes
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Temperature Rating: 40°C
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Width: 3.00 inches
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Height / Length: 3.13 inches
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Depth: 2.50 inches
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Dimensions: 3.00"W x 3.13"L x 2.50"D
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Shipping Weight: 3.10 lbs.
Material Compliance and Certifications
Selecting a replacement circuit breaker involves checking its documented electrical ratings, applicable designations, and any certifications required for the installation. The MP340 has several identified characteristics, while specific material compliance and third-party certification details require additional verification.
The HACR designation does not establish compatibility with every HVAC system, refrigeration application, or electrical panel. Where a particular listing, certification, or material compliance requirement applies, verify the manufacturer's documentation and product markings before installation.
Where It Works Best
- Existing MP340 Circuit Breaker Replacements
- Manufacturer-Approved Electrical Panels
- Compatible Legacy Electrical Systems
- Approved Three-Pole Circuit Applications
- Applicable Heating and Air Conditioning Circuits
- Compatible Refrigeration Equipment Applications
- Electrical Panel Maintenance and Repair
- Approved 240VAC Electrical Installations
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.
Siemens®, I-T-E®, and Murray® are registered trademarks of Siemens AG. Products sold are surplus, used, or refurbished and are NOT supplied by Siemens AG or its affiliates.
Specifications
- Width:3.0
- Height:3.13
- Depth:2.5
- Poles:3
- Amperes:40
- A.I.C. Rating & Volts:10k @ 240VAC
- Type:MP
- Approx Dimensions:3.00"W x 3.13"L x 2.50"D
- Additional Notes:40°C, HACR Rated, Plug-In, Thermal-Magnetic Trip Circuit Breaker. - discontinued by the Manufacturer
Returns are easy
You may return unused items within 30 days of delivery for a refund, subject to our Return Policy.
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CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).
