ZINSCO Q50N N 50A 120V 1P Single-pole Circuit Breaker

Description:

The Zinsco Q50N N (Q50 series) is a 50 Amp, single-pole circuit breaker designed for use in Zinsco / GTE Sylvania load centers. It operates on 120V systems (120/240 VAC class) and features a thermal-magnetic (Magnatrip) trip mechanism that protects circuits from overloads and short circuits. This breaker uses a plug-in mounting design and belongs to the legacy Type Q series.

Applications:

The Zinsco Q50N breaker is commonly used in residential and light commercial circuits requiring 50A protection, such as electric heaters, large window-type air conditioners, compressors, and dedicated high-load receptacle circuits. It is specifically designed for Zinsco-compatible panels, which are now obsolete but still present in older electrical installations.

Technical Specifications:

• Manufacturer: Zinsco / GTE Sylvania / Challenger
• Model / Part Number: Q50N / Q50
• Product Type: Circuit Breaker
• Poles: 1-Pole
• Current Rating: 50 Amps
• Voltage Rating: 120 VAC (120/240V class)
• Interrupt Rating: ~10 kAIC @ 240V
• Mounting: Plug-in
• Trip Type: Thermal-magnetic (Magnatrip)
• Phase: Single-phase
• Status: Obsolete / discontinued (surplus and aftermarket replacements available)

Common Replacements:

• Connecticut Electric UBIZ50 1-Pole 50A Zinsco Replacement Breaker
• Siemens Q150 1-Pole 50A Circuit Breaker
• Square D QO150 / HOM150 1-Pole 50A Circuit Breaker