ZINSCO QB24-1030 U 30A 1P 120V Single-pole Molded Case Circuit Breaker QB241030

Description:

The Zinsco QB24-1030 U is a 30 Amp, single-pole molded case circuit breaker designed for use in Zinsco / GTE Sylvania panelboards. It operates on 120V systems and utilizes a thermal-magnetic trip mechanism to provide protection against overloads and short circuits. This breaker is part of the QB24 series and features a bolt-on mounting design, ensuring a firm electrical connection to the panel bus in legacy installations.

Applications:

The Zinsco QB24-1030 breaker is commonly used in residential and light commercial electrical systems for branch circuits requiring 30A protection, such as air conditioning units, compressors, dedicated receptacles, and small equipment loads. It is specifically intended for Zinsco bolt-on panels, which are typically found in older electrical systems still in service today. 

Technical Specifications:

• Manufacturer: Zinsco / GTE Sylvania / Challenger
• Model / Part Number: QB24-1030 U
• Product Type: Molded Case Circuit Breaker (Bolt-On)
• Poles: 1-Pole
• Current Rating: 30 Amps
• Voltage Rating: 120 VAC
• Mounting: Bolt-on (QB series)
• Trip Type: Thermal-magnetic
• Interrupt Rating: ~10 kAIC
• Function: Overcurrent and short circuit protection
• Status: Obsolete / discontinued

Common Replacements:

• Square D QO130 1-Pole 30A Circuit Breaker
• Siemens Q130 1-Pole 30A Circuit Breaker
• Connecticut Electric UBIZ30 1-Pole 30A Zinsco Replacement Breaker