Siemens B320H - 20 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Protect your panel’s most vital circuits with the Siemens B320H 3-pole bolt-on circuit breaker. Built for reliability in demanding environments, this 20A, 240V unit delivers consistent, fast-acting protection for three-phase systems and single-phase feeders alike.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection to the panel, reducing movement and potential wear over time.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overloads and short circuits, helping to minimize nuisance trips while safeguarding equipment.
• 3-pole design for 240V applications ideal for panelboards and load centers supporting three-phase distribution or multiple 120V legs.
• 20A, 240V rating precisely matched to circuits that require dependable, intermediate protection without frequent tripping.
• Molded-case construction engineered for durability in commercial, residential, and light industrial installations.
• OEM load center compatibility designed to integrate smoothly with Siemens OEM panelboards and matching components for a cohesive protection system.
• Versatile use across environments suited for residential service panels, commercial distribution boards, and light industrial equipment feeders.

Why choose the Siemens B320H?

Unlike generic breakers, the B320H is built to maintain accurate trip thresholds across varying temperatures and loads, ensuring you get the right protection when it matters most. The bolt-on mount and stainless bus connections reduce vibration-induced wear and improve long-term reliability, making it a prudent choice for installations where panel accessibility and dependable performance are paramount.

Use cases and practical scenarios

• Upgrading an aging panel to modern, reliable thermal-magnetic protection for three-phase or multi-leg circuits.
• Adding a dedicated 20A branch circuit in a commercial space without compromising panel integrity.
• Replacing worn-out breakers in load centers that require a snug bolt-on fit and consistent trip behavior.
• Installing in new constructions where Siemens OEM compatibility ensures seamless integration with existing panel ecosystems.

Technical snapshot

• Part Number: B320H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Equip your panel with Siemens reliability and precise protection—the B320H 3-pole bolt-on breaker is ready to safeguard your electrical system with clarity and confidence.