Siemens Q140 - 40 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

Meet Siemens Q140 — a 40A, 120V, 1-pole plug-in molded case circuit breaker engineered for reliable branch circuit protection in panelboards and load centers. Designed for fast, hassle-free swaps, this unit snaps into place with a single plug-in connection, so you spend less time on panel maintenance and more time on the job.

• Fast plug-in connection for quick installation and replacement, reducing downtime in service calls and upgrades.
• Thermal-magnetic trip provides stable, repeatable protection for both overloads and short circuits, helping to prevent nuisance trips and ensure safety.
• Molded case construction delivers rugged durability suitable for residential, commercial, and light industrial environments.
• OEM-compatible with matching Siemens load centers and panelboards, ensuring a clean fit and reliable performance.
• Versatile application ideal for protecting branch circuits in homes, small offices, workshops, and light production settings.

Technical snapshot: Siemens Q140 | 40A, 120V, 1-pole, plug-in, thermal-magnetic molded case circuit breaker. This unit is built to deliver dependable overcurrent and short-circuit protection where you need it most, from service panels to subpanels, without complicating your wiring or maintenance routine.

• Amperage rating: 40 A
• Voltage rating: 120 V
• Poles: 1
• Mounting style: Plug-in
• Type: Thermal-magnetic molded case circuit breaker
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal for electricians and installers who value fast service, predictable trip behavior, and compatibility with existing Siemens panel systems. Whether you're upgrading an older panel, stocking a service truck, or building a new installation, the Siemens Q140 40A breaker delivers reliable protection with straightforward replacement. Purchase with confidence from AmpState and keep your electrical system safe and compliant.