Siemens B150HH - 50 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Siemens B150HH is a purpose-built bolt-on molded case circuit breaker designed to protect electrical systems with dependable branch circuit overcurrent and short-circuit protection. At 50 amps and 120 volts, this 1-pole device is engineered for fast, reliable response in a variety of panel configurations.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose terminations and ensuring consistent protection even in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal overload sensing with magnetic fault detection, so your circuits react quickly to short circuits while avoiding nuisance trips.
• Molded case design enhances durability and safety, simplifying integration into compatible equipment and reducing wear on both breaker and panelboard over time.
• OEM-compatible compatibility is built to match Siemens load centers and panelboards, ensuring a seamless fit and straightforward replacement in existing systems.
• Versatile application suitable for residential, commercial, and light industrial installations, making it a practical choice for a wide range of protective needs.

How it works: when current exceeds 50A, the thermal element heats and trips under sustained overload, while the magnetic element trips instantly on high fault currents. This dual-action protection minimizes damage to wiring and devices, reduces fire risk, and keeps critical circuits running when safe to do so.

Ideal use scenarios include protecting branch circuits in home service panels, workshop subpanels, small business electrical rooms, or any installation that relies on a rugged, plug-free bolt-on solution. Pair this breaker with compatible Siemens panelboards for a cohesive protection system that’s easy to install and maintain.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: B150HH
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Siemens B150HH for a robust, reliable protection solution that delivers precise trip performance, secure mounting, and OEM-compatible integration—built to keep residential spaces, commercial environments, and light industrial setups safely powered.