Siemens B2125HH Molded Case Circuit Breaker | 125A, 2-Pole, 240V

The Siemens B2125HH is a 2-pole, 125 Amp, 240 V AC molded case circuit breaker designed for heavy-duty residential and light commercial applications. As a high-interrupting variant within the BL-frame family, this breaker is engineered to provide superior protection for high-load circuits, such as sub-panel feeders, large HVAC systems, and industrial machinery.

The "HH" suffix denotes a high-interrupting capacity of 65 kAIC @ 240 V AC, making it suitable for installations near the service entrance or in environments where high fault currents are possible. It features a bolt-on mounting style for secure installation in Siemens P1, P2, and P3 panelboards.

Key Features

• Poles: 2

• Amperage: 125 A

• Voltage: 240 V AC

• Type: Molded Case Circuit Breaker (Type BLH/BHH)

• Trip Unit: Fixed Thermal-Magnetic

• Interrupting Capacity: 65 kAIC @ 240 V AC

• Mounting Style: Bolt-On

• Applications: Main or branch protection in Siemens panelboards, HVAC systems, and heavy residential loads

• Protection: Reliable protection against sustained thermal overloads and high-energy short circuits

Technical Specifications

• Manufacturer: Siemens

• Catalog Number: B2125HH

• UPC Number: 783643263598

• Phase: Single-phase

• Frequency Rating: 60 Hz

• Connection: Bolt-On

• Wire Range: #4 AWG - 2/0 AWG (Cu/Al)

• Approvals: UL Listed, CSA Certified, HACR Rated

Returns are easy

You may return items within 30 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers 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, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.