ZINSCO R38-20 U 20A 120V 2P

Description:

The Zinsco R38-20 U is a tandem (twin) circuit breaker designed for residential and light commercial electrical distribution systems. It provides overcurrent protection for 120V circuits and allows two 20A circuits to be installed in a single breaker slot, maximizing panel space. Commonly used in legacy Zinsco panelboards, it protects wiring and connected equipment from overloads and short circuits. Electricians use this breaker for circuit protection, panel upgrades, and replacement of obsolete Zinsco components.

Applications:

The Zinsco tandem circuit breakers are commonly used in residential and light commercial electrical panels where space-saving circuit protection is required. Typical applications include branch circuit protection, panelboard upgrades, and electrical distribution systems where multiple circuits need to be installed within limited panel space while maintaining reliable overcurrent protection.

Technical Specifications:

• Manufacturer Part Number (MPN): R38-20 U
• Brand: Zinsco
• Product Type: Tandem Circuit Breaker
• Amperage: 20A (per circuit)
• Voltage Rating: 120V / 120-240V
• Poles: 2-Pole (twin configuration)
• Configuration: Two 1-pole 20A breakers in one unit
• Mounting Type: Plug-in (panel mount)
• Application: Overcurrent protection for branch circuits
• Compatibility: Zinsco panelboards
• Status: Discontinued / legacy equipment

Common Replacements:

• Connecticut Electric UBIZ220
• Siemens Q2020 (panel dependent)
• Eaton BR2020 (panel dependent)