Zinsco RC38-40 Plug-In Circuit Breaker 40A 120 240V 2P 1PH Type RC38

Description:

The Zinsco RC38-40 plug-in circuit breaker is used in residential and commercial electrical distribution panel systems. Commonly installed in Zinsco and Sylvania load centers for branch circuit and appliance protection. Maintenance electricians, contractors, and technicians use this breaker for replacement, retrofit, and restoration of legacy electrical panels.

Applications:

The Zinsco RC38-40 circuit breaker is used in electrical distribution systems to provide overcurrent and short-circuit protection for 120/240V circuits. It is widely applied in residential homes, commercial buildings, and light industrial facilities where Zinsco panels are still in operation. Its twin/tandem design allows space-saving installation while protecting loads such as HVAC units, water heaters, and general power circuits requiring reliable dual-pole protection.

Technical Specifications:

• Manufacturer: Zinsco / Sylvania
• Model / Part Number: RC38-40 / R38-40
• Product Type: Molded Case Circuit Breaker (Plug-in)
• Rated Current: 40 Amp
• Poles: 2-pole (double pole)
• Voltage Rating: 120/240 VAC
• Interrupt Rating: Approx. 10 kAIC @ 120/240V
• Mounting Type: Plug-in / Plug-on
• Trip Type: Thermal-magnetic
• Design: Thin / tandem (space-saving)
• Phase: Single-phase
• Application: Branch circuit protection for legacy panels
• Status: Obsolete, typically available as refurbished or replacement units

Common Replacements:

• Zinsco UBIZ0240 Replacement Breaker
• Zinsco RC38-40-R
• Connecticut Electric UBIZ240