Siemens Q120u Mp120 Circuit Breaker, Single Pole, 120-volt, 20-amp

The Siemens Q120U MP120 is a single-pole circuit breaker designed to protect residential and light-commercial electrical panels from overloads and short circuits. This 20-amp breaker fits into a standard 1-inch DIN space, providing reliable 120-volt protection for lighting circuits, outlets, and small appliances. It delivers precise fault detection to prevent excess current from damaging wiring and connected devices, reducing the risk of electrical fires and system failures.

The compact single-pole design simplifies installation in standard 120-volt breaker panels and makes replacements and panel upgrades straightforward. Siemens Q120U breakers are recognized for their quality and proven reliability across residential and light-commercial applications. With instantaneous trip technology, this breaker responds immediately to faults for fast circuit isolation.

Features and Benefits

• 20-Amp Rating: Protects lighting circuits, outlets, and small appliances with consistent 20-amp capacity.
• Single-Pole Configuration: Fits standard 120-volt breaker panels for single-phase applications.
• 1-Inch DIN Space: Compact design maximizes available panel room and eases future upgrades and replacements.
• Instantaneous Trip: Responds immediately to faults, providing fast circuit isolation.
• UL Listed and SWD Rated: Certified to meet North American safety codes and rated for fluorescent lighting loads at 120 VAC.
• Drop-In Replacement: Compatible with many major brands including American Switch, Westinghouse Type BR, Bryant, Challenger, Sylvania, and others.

Specifications

• Brand: Siemens
• Model: Q120U
• Type: MP-T with Insta-Wire
• Amperage: 20 Amps
• Poles: Single Pole (1-Pole)
• Voltage: 120 VAC
• Space Required: 1 inch per pole
• Trip Type: Instantaneous
• Interrupting Rating: 10,000 AIR
• Ratings: UL Listed, SWD Rated
• Application: 120 VAC fluorescent lighting compatible