Siemens Q370H - 70 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Siemens Q370H — a 70A, 240V, 3-pole Plug-In Molded Case Circuit Breaker designed to deliver trustworthy branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for reliability, this unit blends fast installation with dependable protection, keeping your electrical system safe and accessible.

• Fast plug-in connection — streamline installation and replacement, reducing downtime during panel maintenance or upgrades.
• Thermal-magnetic trip unit — provides stable, repeatable protection performance against both overloads and short circuits, so circuits trip predictably when they need to.
• OEM compatibility — designed to fit and work seamlessly with matching Siemens OEM load centers and panelboards for consistent safety and performance.
• Versatile applications — ideal for residential, commercial, and light industrial environments that require reliable 3-pole, 240V protection on branch circuits.
• 3-pole, 240V protection — supports three-phase circuits and associated equipment, helping safeguard motors, HVAC equipment, lighting feeders, and other loads.

What makes the Q370H unique

Unlike generic breakers, the Q370H combines a plug-in mounting design with a thermal-magnetic protection approach, delivering quick, safe upgrades in existing panelboards and load centers. Its three-pole configuration is purpose-built for balanced three-phase systems, helping to prevent phase-to-phase faults and ensuring coordinated protection across the electrical distribution network.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: Q370H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for professionals upgrading or expanding panelboards and load centers, the Siemens Q370H 70A 240V 3-pole plug-in breaker ensures robust protection where three-phase power is present. Whether you’re wiring a small commercial space, an industrial light load, or a residential subpanel with multiple three-phase circuits, this breaker provides precise protection, rapid installation, and long-term reliability.