Siemens Q370 - 70 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Siemens Q370—a 70 A, 240 V, 3-pole plug-in molded case circuit breaker engineered for reliable branch circuit protection in panelboards and load centers. Designed for fast, secure installation and durable performance, it’s a smart choice for residential upgrades, commercial spaces, and light industrial setups where dependable short-circuit and overcurrent protection is non-negotiable.

• Fast plug-in connection: Quick, tool-friendly installation and easy replacement when service changes or panel updates are required, reducing downtime and labor costs.
• Thermal-magnetic trip unit: Combines precise overload protection with instantaneous short-circuit isolation, delivering stable, repeatable protection curves across varied loads and conditions.
• 3-pole, 240 V design: Ideal for three-phase systems and 240 V line-to-line configurations, providing coordinated protection for multi-wire branches.
• OEM-compatible compatibility: Engineered to align with Siemens load centers and panelboards, ensuring reliable fit, performance, and electrical coordination with existing equipment.
• Versatile applications: Suitable for a wide range of environments—from homes modernizing electrical distribution to commercial suites and light industrial facilities needing robust circuit protection.

Why choose the Siemens Q370 in your electrical protection plan

The Q370 isn’t just a breaker—it’s a protection decision that influences safety, reliability, and future-proofing of your electrical system. The thermal-magnetic mechanism means time-tested protection against nuisance trips during mild overloads while delivering a decisive response to short circuits, helping to minimize equipment damage and downtime. Its plug-in form factor supports straightforward upgrades and replacements in compatible Siemens panels, reducing the complexity often associated with panel servicing. When you need a dependable, compatible, and easy-to-service 3-pole solution for 240 V circuits, the Q370 stands out as a thoughtful, field-proven choice.

Ideal use cases

Use the Siemens Q370 for:

• Upgrading aging panelboards or load centers in residential or light commercial spaces
• Replacing failing or worn breakers within Siemens-compatible systems
• Protecting three-phase distribution legs in small commercial or light industrial installations
• Ensuring consistent protective coordination on 240 V branch circuits

Technical overview

• Manufacturer: Siemens
• Part Number: Q370
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

For professionals and DIY enthusiasts alike, the Siemens Q370 provides a precise balance of protection, compatibility, and installability. When you select this 3-pole 70 A breaker, you’re choosing a component designed to integrate seamlessly into Siemens panel environments, delivering dependable, long-term performance for your electrical distribution needs.