⚡ Power Up Your Safety with Style! Intertek ETL Listed to UL Standard 489 for peace of mind in US and Canada. Fits seamlessly into Zinsco panels with a space-saving 3/4" body. Enjoy a decade of reliability with a 10-year warranty. Also branded as Sylvania RC 3840, making it a flexible choice for your needs. Ensure your electrical system runs smoothly with this 40 Amp circuit breaker. 40A Power Plug-In Type 10k AIC Safety The UBIZ0240-New Zinsco RC3840 Replacement is a high-performance, two-pole 40 Amp circuit breaker designed for Zinsco panels. Manufactured by Connecticut Electric, it features a compact design, is ETL Listed for safety, and offers a robust 10,000 AIC rating, ensuring reliable power management for your electrical systems.