Description
Product Overview
The UBIZ0240 is a new Zinsco RC3840 replacement circuit breaker manufactured by Connecticut Electric. Designed for use in Zinsco panels, this 40-amp, 2-pole breaker is rated for 120/240VAC and features a plug-in mounting type. Constructed with copper material and molded case design, it meets UL Standard 489 and Intertek ETL listing for safety and reliability. With a 10,000AIC interrupting rating and black finish, it’s ideal for residential and light commercial applications. The compact 3.3″D x 0.8″W x 5.3″H size ensures easy installation and compatibility with existing Zinsco panels.
Usage
This breaker is suitable for homeowners, electricians, and contractors who need a reliable replacement for Zinsco panels. It’s commonly used in residential electrical systems for 40-amp circuits, including appliances, HVAC, and other high-load devices. The plug-in design simplifies installation without requiring panel modifications. Ideal for both DIY enthusiasts and professional installers, it’s compatible with 120/240VAC systems and fits standard Zinsco panel configurations.

Why Choose Us
We offer a genuine Connecticut Electric replacement with a 10-year warranty, ensuring long-term reliability. The breaker is UL and ETL listed, meeting North American safety standards. Its copper construction ensures excellent conductivity and durability. The plug-in design reduces installation time and complexity. Additionally, we provide responsive customer support and accurate product information to ensure a seamless buying experience.
Key Features
- UL and ETL listed for safety and compliance in US and Canada
- 10,000AIC interrupting capacity for reliable circuit protection
- Plug-in mounting type simplifies installation without panel modifications
- Copper construction ensures high conductivity and long-term durability
- 10-year warranty and responsive customer support for peace of mind
FAQ
Is this breaker compatible with Zinsco panels?
Yes, this UBIZ0240 replacement is specifically designed for Zinsco panels and fits standard 3/4″ body panels. It’s also compatible with panels that accept Sylvania RC3840 breakers.
What voltage does this breaker support?
This breaker supports 120/240VAC, making it suitable for standard residential and light commercial applications requiring 40-amp circuits.
What is the warranty on this product?
This product comes with a 10-year warranty from Connecticut Electric, ensuring long-term reliability and performance.
Can I install this breaker myself?
Yes, with basic electrical knowledge and tools, this plug-in breaker can be installed by DIYers. However, always follow local electrical codes and safety practices.
Is this breaker discontinued by the manufacturer?
No, this product is not discontinued by Connecticut Electric and is currently available for purchase.







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