Siemens B150H - 50 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens B150H — 50 A, 120 V, 1-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. This thermal-magnetic unit is built to deliver stable, repeatable overcurrent and short-circuit protection across residential, commercial, and light industrial applications.

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, helping maintain reliable protection even in environments with movement or equipment vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance by responding predictably to both overloads and short circuits.
• OEM-compatible design is matched to Siemens panelboards and load centers, simplifying replacement or expansion without compatibility concerns.
• Versatile 1-pole, 50 A, 120 V configuration makes it suitable for protecting individual branch circuits in a wide range of installations, from homes to small commercial setups.

Technical specifications

• Manufacturer: Siemens
• Part Number: B150H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50 A
• Voltage Rating: 120 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and installation scenarios

The Siemens B150H is an excellent choice when upgrading or expanding panelboards and load centers that require reliable single-pole protection for individual branches. It’s ideal for retrofit projects in existing residential panels, as well as new installations in light commercial or small industrial settings where vibration or panel movement might otherwise affect connections. Because it’s designed to be compatible with Siemens OEM equipment, you can trust a straightforward fit when replacing an existing breaker or adding circuits in compatible systems.

Why this breaker stands out

What sets the B150H apart is its emphasis on durable, consistent performance in real-world conditions. The bolt-on mounting minimizes loosening risk in vibration-prone environments, while the thermal-magnetic trip unit provides predictable protection behavior across a range of fault conditions. This combination reduces nuisance trips and gives technicians confidence in protection strategies for branch circuits.

If you’re upgrading a panelboard or load center and need a dependable, one-pole solution that aligns with Siemens equipment, the B150H delivers the right balance of protection, compatibility, and installation reliability. It’s a practical, no-nonsense choice for safeguarding electrical circuits and maintaining system uptime in residential, commercial, and light industrial applications.