Siemens B3100 - 100 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens B3100 — a 100A, 240V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Sold by AmpState, this device is built to stand up to the demands of residential, commercial, and light industrial electrical layouts.

Key advantages that set this breaker apart

• Secure bolt-on mounting provides a rigid, vibration‑resistant bus connection, helping maintain consistent performance even in environments with movement or vibration.
• Thermal‑magnetic trip unit delivers stable, repeatable protection — the thermal element tracks long‑term overcurrent while the magnetic element delivers an instantaneous response to short‑circuit faults.
• 3‑pole design protects all three hot legs in 3‑phase systems, making it suitable for a range of modern electrical installations.
• OEM compatibility designed to pair with matching Siemens OEM panelboards and load centers for a cohesive, trouble‑free upgrade or replacement.
• Versatile application ideal for residential setups, commercial spaces, and light industrial applications that require reliable, scalable protection on 240V circuits.

The B3100’s combination of a robust bolt‑on mount and a responsive thermal‑magnetic trip mechanism means fewer nuisance trips and quicker fault isolation. With a 100A rating, it’s well-suited for mid‑range branch circuits that must balance protection with capacity, whether you’re powering large appliances, HVAC equipment, or critical office infrastructure.

Practical use cases

• Upgrading aging panelboards or load centers to restore reliable protection and simplify future maintenance.
• Installing or expanding circuits in commercial spaces where 3‑phase distribution is common, while preserving a clean, secure mounting method.
• Replacement in residential or light industrial panels that require a dependable, OEM‑aligned solution to maintain system safety and code compliance.

Who should consider the Siemens B3100? Electricians and facilities managers working with Siemens panelboards or OEM load centers who need a durable, plug‑and‑play upgrade or replacement that won’t compromise bus integrity or protection performance. If you’re planning a panel upgrade, service expansion, or a controlled fault‑protection strategy for 240V circuits, this 3‑pole bolt‑on breaker is a practical, long‑term choice.

Tips for optimal use: verify panel compatibility with the B3100 model, follow the panel manufacturer’s torque specifications for bolt‑on mounting, and confirm that total load on the circuit remains within the 100A rating to prevent nuisance trips or overheating.

In short, the Siemens B3100 delivers durable protection, precise trip performance, and straightforward installation for reliable 240V circuit safety in a wide range of settings.