Siemens Q125 - 25 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

Meet the Siemens Q125 25A 120V 1-Pole Plug-In Circuit Breaker — a purpose-built protector for your 120-volt electrical system. This molded case breaker combines fast plug-in installation with precise, dependable protection, making it a practical upgrade for panelboards and load centers in homes, small businesses, and light industrial settings.

• Fast plug-in connection for quick installation and painless replacements. Drop it into the panel, and you’re protected without complicated wiring or tools.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance. It responds quickly to short circuits while accommodating normal inrush currents, helping to minimize nuisance trips.
• OEM-load center compatibility ensures a seamless fit with matching Siemens panelboards and load centers for reliable electrical characteristics and ongoing system integrity.
• Versatile for multiple environments suitable for residential, commercial, and light industrial applications that run on 120V circuits, providing dependable protection where you need it most.

Why choose the Siemens Q125 in your electrical system?

Running a 25-amp, 120-volt circuit? The Q125 is built to safeguard branch circuits against overcurrent and short circuits without sacrificing performance. Its plug-in design reduces installation downtime, making it ideal for panel improvements, quick replacements after a fault, or routine panel maintenance. The thermal-magnetic mechanism delivers consistent trip characteristics, so you’ll experience predictable protection at every fault level.

Use cases and practical scenarios

• Residential: protect a dedicated 25A branch circuit serving high-draw 120V appliances or heavy-use receptacle runs in living spaces, kitchens, or workshops.
• Commercial: reliable protection for 120V circuits in small offices, shops, or service areas where quick replacement and dependable performance are essential.
• Light industrial: safeguard 120V feeders and subcircuits that require sturdier protection without complex installation.

Installation and compatibility tips

• Always verify that the panelboard or load center is designed to accept plug-in molded case breakers of this type and rating.
• Power down the main disconnect before swapping breakers and ensure the new breaker is the correct amperage (25A) and pole (1-pole) for the circuit.
• Keep the circuit labeling clear to reflect the protected load, easing future service or inspections.

Specifications at a glance

• Manufacturer: Siemens
• Part number: Q125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 25A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection