Siemens B370HH - 70 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Designed for dependable branch-circuit protection, the Siemens B370HH 70A, 240V, 3-pole bolt-on molded case circuit breaker is built to endure demanding panelboard and load center environments. With a rugged bolt-on mounting, it establishes a rigid, vibration‑resistant bus connection that stays secure even in systems with heavy equipment or repeated cycling.

At the heart of this breaker is a thermal‑magnetic trip unit, delivering stable, repeatable protection across varying loads and temperatures. This means fewer nuisance trips and clearer coordination with other protective devices in your electrical distribution, keeping critical circuits safe without unnecessary shutdowns.

Designed for seamless integration, the B370HH is compatible with matching OEM load centers and panelboards, ensuring a clean fit and reliable operation. Its 3-pole configuration makes it ideal for 3‑phase systems, providing balanced protection for industrial, commercial, and residential applications that require robust short‑circuit and overcurrent protection.

Key features in detail

• 70A, 240V, 3-pole—suitable for common 3‑phase branch circuits and mid‑size protection needs
• Bolt-on mounting—secure, vibration‑resistant connection to the bus and panelboard
• Thermal‑magnetic trip unit—stable, repeatable protection performance across varying loads
• Molded case construction—durable, reliable protection designed for ongoing use in demanding environments
• OEM compatibility—works with matching Siemens panelboards and load centers for straightforward installation

Ideal use scenarios

Perfect for electrical rooms in small to mid‑sized commercial spaces, light industrial panels, and residential multifamily installations that rely on 3‑phase distribution. Use it to protect feeders, motor circuits, lighting panels, and other critical branch circuits where dependable shutdown protection is essential.

Why this matters for your project

Choosing the Siemens B370HH means prioritizing reliability and predictability. The combination of bolt-on mounting and a thermal‑magnetic trip mechanism reduces the risk of loose connections and unpredictable trips, which translates to safer equipment, less maintenance, and smoother operation of your electrical system. When you need a trusted, field‑tested solution that aligns with Siemens OEM panels, this 3‑pole breaker from AmpState delivers clarity, compatibility, and dependable protection in one compact package.

Technical snapshot at a glance: 70A current rating, 240V voltage, 3 poles, bolt-on mounting, thermal‑magnetic molded case protection. A practical, durable choice for professional electrical install‑stock and service panels where quality and consistency matter.