ZINSCO RC38-40 U 40A 240V 2P

Description:

The Zinsco RC38-40 U is a molded case circuit breaker designed for residential and light commercial electrical panels. It provides overcurrent protection by disconnecting power during overloads or short circuits. This breaker is specifically built for Zinsco load centers and is commonly used as a replacement component in legacy electrical systems.

Applications:

The Zinsco RC38-40 breaker is used in older residential and commercial panels to protect circuits feeding large loads such as HVAC systems, water heaters, and appliances. It is typically installed in Zinsco panels where compatibility with the original bus design is required.

Technical Specifications:

• Manufacturer Part Number (MPN): RC38-40 / RC3840
• Product Type: Molded Case Circuit Breaker
• Poles: 2-pole
• Rated Current: 40 Amps
• Rated Voltage: 120/240 V AC
• Mounting Type: Plug-in (Zinsco panel compatible)
• Breaker Type: Thermal-magnetic
• Design: Thin/tandem style (RC38 frame)
• Application: Branch circuit protection in Zinsco load centers

Notes (important):

• Zinsco breakers are obsolete and no longer manufactured; most available units are refurbished or aftermarket replacements
• Many electricians recommend panel replacement due to known reliability concerns with Zinsco equipment

Common Replacements:

• Connecticut Electric UBIZ0240 Replacement Breaker (modern Zinsco-compatible replacement)
• Connecticut Electric VPKUBIF0240 Breaker (aftermarket retrofit option)
• Full panel upgrade (Siemens, Eaton, Square D) for long-term reliability