Siemens B31500S01 - 15 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens B31500S01 is a purpose-built 15A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for real-world reliability, it combines robust mounting, precise protection, and seamless compatibility with Siemens OEM panel products.

Secure, vibration-resistant bolt-on mounting

The bolt-on design on the Siemens B31500S01 creates a rigid, vibration-resistant bus connection. This means less movement under operation, reduced risk of terminal loosening, and a longer service life in environments where equipment vibrates or where panel assemblies experience movement during installation or operation.

Thermal-magnetic protection you can rely on

Equipped with a thermal-magnetic trip unit, this 3-pole breaker delivers stable, repeatable protection for both overload and short-circuit conditions. The thermal element handles gradual overloads with precision, while the magnetic element rapidly interrupts severe short circuits, helping to protect wiring, devices, and downstream equipment.

Designed for compatibility and versatility

The Siemens B31500S01 is purpose-built to be compatible with matching OEM load centers and panelboards. Whether you’re upgrading an existing Siemens installation or stocking a replacement for a Siemens-rated panel, this 3-pole bolt-on breaker integrates smoothly with your system architecture.

Technical snapshot

• Manufacturer: Siemens
• Part Number: B31500S01
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

This 15A, 240V, 3-pole bolt-on breaker is well-suited for:

• Residential panels where a reliable three-phase protection solution is needed in specific loads
• Commercial panelboards protecting lighting, receptacle, and small equipment circuits
• Light industrial electrical distributions requiring sturdy mounting and dependable trip performance
• Replacing legacy breakers in Siemens-compatible loadcenters to restore planned protection without compatibility concerns

Why choose the Siemens B31500S01 over other options

Beyond basic outage protection, this breaker emphasizes long-term reliability and system integrity. The bolt-on construction minimizes vibration-induced issues, while the thermal-magnetic trip unit provides fast disconnection for dangerous faults and controlled responses for nuisance overloads. When you pair it with Siemens panel products, you gain predictable behavior, streamlined maintenance, and a cohesive protection strategy across residential, commercial, and light industrial installations.

Practical guidance and outcomes

For electricians and facilities teams, the B31500S01 offers a straightforward upgrade path—swap in a 15A, 240V, 3-pole unit that aligns with your Siemens load centers and panelboards. Expect clear, repeatable protection performance, reduced downtime from unexpected faults, and a safer electrical distribution that supports reliable operation of connected equipment and circuits.

In short, the Siemens B31500S01 isn’t just a breaker—it’s a robust, compatible, and dependable solution for safeguarding your electrical distribution in a variety of settings. It’s the practical choice when you need precise trip characteristics, solid mechanical mounting, and seamless OEM compatibility.