MH120 - 20Amp Circuit Breaker Description
MH120 - 20Amp Circuit Breaker
Need a dependable replacement circuit breaker that fits your existing electrical panel without taking up extra space? The MH120 20 Amp Single-Pole Circuit Breaker is a compact, space-saving solution for compatible MH and MM frame electrical systems. With a 20-amp current rating, 120VAC voltage rating, and 10,000-amp interrupting capacity (10kA AIC), this thermal magnetic circuit breaker provides overload and short-circuit protection in properly rated electrical applications. Its slim 0.50-inch width makes it especially useful for electrical panels with limited space, while the plug-in mounting design supports installation in approved panel configurations. When properly selected, installed, and maintained, the MH120 combines thermal and magnetic trip mechanisms to respond to different overcurrent conditions. The breaker is also HACR rated and specified for a 40°C ambient temperature reference, making it suitable for applicable heating, air conditioning, and refrigeration equipment circuits.
Key Features and Benefits
- 20 Amp, Single-Pole Configuration
- 10kA Interrupting Capacity
- Space-Saving 0.50-Inch Width
- Thermal Magnetic Protection
- Plug-In Mounting Design
- MH/MM Frame Identification
Technical Specifications
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Part Number: MH120
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Product Type: Thermal Magnetic Circuit Breaker
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Frame Type: MH; MM
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Number of Poles: 1
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Amperage Rating: 20 Amps
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Voltage Rating: 120VAC
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Interrupting Capacity (A.I.C.): 10kA at 120VAC
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Mounting Type: Plug-In
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Breaker Configuration: Space-Saving
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HACR Rating: Yes
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Temperature Rating: 40°C
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Width: 0.50 inches
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Height: 3.25 inches
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Depth: 2.56 inches
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Overall Dimensions: 0.50" W × 3.25" H × 2.56"D
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Shipping Weight: 1.50 lbs.
Material Compliance and Certifications
The MH120 20 Amp Circuit Breaker is HACR rated, indicating suitability for applicable heating, air conditioning, and refrigeration equipment circuits when installed per the equipment specifications and relevant electrical codes.
Its specified 40°C temperature rating and 10kA interrupting capacity at 120VAC provide important electrical reference points for determining whether the breaker meets the requirements of an existing installation.
Proper installation must follow the electrical panel manufacturer's requirements, applicable electrical codes, and the breaker's approved usage conditions. HACR identification alone does not establish compatibility with every HVAC system or electrical panel.
Where It Works Best
- Legacy Electrical Panel Maintenance
- Residential Electrical Systems
- Commercial Electrical Installations
- Space-Constrained Electrical Panels
- HVAC Equipment Circuits
- Electrical Repair and Maintenance
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:0.5
- Height:3.25
- Depth:2.56
- Poles:1
- Amperes:20
- A.I.C. Rating & Volts:10k @ 120VAC
- Type:MH; MM
- Approx Dimensions:0.50"W x 3.25"L x 2.56"D
- Additional Notes:40°C, HACR Rated, Plug-In, Space-Saving, Thermal Magnetic 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.
FREE ground shipping on breaker orders over $100 and all other items with orders over $500.
Shipping charges are Prepaid and Allowed on UPS Ground orders for all other products on orders over $500.00, again only when shipping within the lower 48 continental United States, provided the product(s) can safely ship UPS Ground.
If the product cannot safely ship via UPS Ground, or is too heavy to ship UPS Ground, then the product will be shipped via freightliner at buyer's expense.
CIRCUIT BREAKER SUPERSTORE® offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).
Same Day Shipping
We strive to ship out your items within one business day.
In rare circumstances, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.
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).