Zinsco QFP125-2 Challenger Silvania Circuit Breaker 2P 125 Amp 240V QFP1252

Description:

The Zinsco QFP125-2 is a 125 Amp, 2-pole molded case circuit breaker designed for use in Zinsco / Challenger / GTE Sylvania load centers. It operates on 120/240V systems and features a thermal-magnetic trip mechanism that protects circuits from overloads and short circuits. It belongs to the QFP series and uses a plug-in (plug-on) mounting style for installation in compatible panels. This model is commonly used as a main breaker and includes load-side lugs for direct conductor termination, with a typical interrupt rating of around 10 kAIC.

Applications:

The Zinsco QFP125-2 breaker is commonly used in residential and light commercial electrical systems as a main disconnect or feeder breaker for subpanels, service entrances, and large distribution circuits requiring 125A protection. It is specifically intended for legacy Zinsco panels and is primarily used today for maintenance or replacement of existing installations. 

Technical Specifications:

• Manufacturer: Zinsco / GTE Sylvania / Challenger
• Model / Part Number: QFP125-2
• Product Type: Molded Case Circuit Breaker
• Poles: 2-Pole
• Current Rating: 125 Amps
• Voltage Rating: 120/240 VAC
• Mounting: Plug-in / Plug-on (QFP series)
• Trip Type: Thermal-magnetic
• Interrupt Rating: ~10 kAIC @ 240V
• Terminals: Load-side lugs included
• Phase: Single-phase
• Function: Overcurrent and short circuit protection
• Status: Obsolete / discontinued

Common Replacements:

• Connecticut Electric UBITBFP1252 2-Pole 125A Zinsco Replacement Breaker
• Siemens Q2125 2-Pole 125A Circuit Breaker
• Square D QOM2125VH / QOB2125VH 2-Pole 125A Circuit Breaker