ZINSCO QB24-2060 U 60A 240V 2-pole Molded Case Circuit Breaker QB242060

Description:

The Zinsco QB24-2060 U is a 60 Amp, 2-pole molded case circuit breaker designed for use in Zinsco / GTE Sylvania panelboards. It operates on 240V systems and uses a thermal-magnetic trip mechanism to protect circuits from overloads and short circuits. This breaker is part of the QB24 series and features a bolt-on mounting design, providing a secure electrical connection to the panel bus in commercial and residential distribution systems. Listings confirm its configuration as a 60A, 2-pole, 240V unit typically sold in used or surplus condition.

Applications:

The Zinsco QB24-2060 breaker is commonly used in residential and light commercial electrical systems for 240V circuits requiring 60A protection, such as HVAC systems, electric heaters, subpanels, and large appliances. It is specifically intended for installation in Zinsco bolt-on panels and is primarily used today for maintenance or replacement of legacy systems due to its discontinued status. 

Technical Specifications:

• Manufacturer: Zinsco / GTE Sylvania / Challenger
• Model / Part Number: QB24-2060 U
• Product Type: Molded Case Circuit Breaker (Bolt-On)
• Poles: 2-Pole
• Current Rating: 60 Amps
• Voltage Rating: 240 VAC
• Mounting: Bolt-on (QB series)
• Trip Type: Thermal-magnetic
• Interrupt Rating: ~10 kAIC @ 240V (typical class)
• Function: Overcurrent and short circuit protection
• Status: Obsolete / discontinued (surplus market availability)

Common Replacements:

• Connecticut Electric UBIZ260 2-Pole 60A Zinsco Replacement Breaker
• Siemens Q260 2-Pole 60A Circuit Breaker
• Square D QOB260 2-Pole 60A Bolt-On Circuit Breaker