Siemens B120HM 20A 1P 120V Circuit Breaker | AmpState

The Siemens B120HM 20A 1P 120V Circuit Breaker is a compact, dependable protection device designed to safeguard branch circuits in panelboards, load centers, and electrical distribution schemes. Built to integrate seamlessly with Siemens equipment, this 1-pole breaker delivers reliable overcurrent protection for 120-volt circuits, helping keep wiring, devices, and occupants safe in both retrofit projects and ongoing service.

Why choose the B120HM for your project

• Exact part number for retrofit and maintenance: Using the B120HM ensures your service documentation and inventory stay consistent, simplifying replacements when the part needs to be swapped years down the line.
• 20 amp, 1-pole, 120-volt design: Specifically suited for individual branch circuits in typical US electrical systems, providing precise protection without unnecessary interruptions.
• Panel and distribution compatibility: Designed for use with Siemens panelboards, load centers, and electrical distribution setups where Siemens protection is preferred.
• Availability from AmpState: Easily sourced under the part number B120HM, helping you keep maintenance programs on schedule and reduce downtime.

Ideal use cases

• Retrofit projects where maintaining the exact part number simplifies ordering, labeling, and future replacements.
• Maintenance planning for electrical systems that rely on consistent Siemens components.
• Replacement on existing Siemens panelboards and load centers to restore protected circuits after nuisance trips or damage.

Practical tips for selection and installation

• Confirm your system is designed for a 1-pole, 20A, 120V circuit breaker before purchasing.
• For compatibility questions, or to verify fit within a specific Siemens panel or distribution box, send a message and we’ll help confirm the correct match.
• Always follow proper electrical safety practices and, when in doubt, consult a qualified electrician for installation and panel compatibility checks.