Zinsco Q243040 Circuit Breaker - 40A, 240V, 3-Pole

The Zinsco Q243040 is a 40 amp, 240 volt, 3-pole molded case circuit breaker from the Zinsco Q Series, designed for dependable branch-circuit protection in residential and light commercial electrical systems. This breaker features a plug-in mounting design and thermal-magnetic (LI) protection, providing long-time and instantaneous response to overloads and short circuits.

Engineered specifically for Zinsco Q Series load centers and panels, the Q243040 is commonly used as a direct replacement in older Zinsco installations. Its compact form factor allows for efficient panel space usage while maintaining reliable electrical protection.

Key Features & Specifications:

• Manufacturer: Zinsco

• Part Number: Q243040

• Amperage: 40 Amp

• Voltage: 240 Volt

• Poles: 3

• Series: Q Series

• Breaker Type: Molded Case

• Mounting Type: Plug-In

• Interrupt Rating: 10kA @ 240V

• Protection: Thermal Magnetic (Long-Time & Instantaneous)

• Application: Residential & Light Commercial

• Compatibility: Zinsco Q Series Load Centers

• Condition: New

At Circuit Breaker Guys, we stock hard-to-find and legacy electrical components and ship fast to keep your projects moving. Our experienced team is here to help confirm compatibility and ensure you get the right breaker the first time.