ZINSCO QCAL-70N N 70A 240V 2-pole Molded Case Circuit Breaker QCAL70N

Description:

The Zinsco QCAL-70N N is a 70 Amp, 2-pole molded case circuit breaker designed for use in Zinsco / GTE Sylvania load centers. It operates on 240V systems and uses a thermal-magnetic trip mechanism to protect circuits from overloads and short circuits. It belongs to the QCAL (QC/QCAL series) and features a plug-in (snap-in) mounting style for installation in compatible panels. Standard specifications confirm a 70A rating, 2 poles, and 240V operation with a typical interrupt rating of around 10 kAIC.

Applications:

The Zinsco QCAL-70N breaker is commonly used in residential and light commercial electrical systems for 240V circuits requiring 70A protection, such as HVAC systems, subpanels, large compressors, and heavy-duty equipment. 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
• Model / Part Number: QCAL-70N N
• Product Type: Molded Case Circuit Breaker
• Poles: 2-Pole
• Current Rating: 70 Amps
• Voltage Rating: 240 VAC
• Mounting: Plug-in / Snap-in (QC/QCAL series)
• Trip Type: Thermal-magnetic
• Interrupt Rating: ~10 kAIC @ 240V
• Phase: Single-phase
• Function: Overcurrent and short circuit protection
• Status: Obsolete / discontinued

Common Replacements:

• Connecticut Electric UBIZ270 2-Pole 70A Zinsco Replacement Breaker
• Siemens Q270 2-Pole 70A Circuit Breaker
• Square D QO270 2-Pole 70A Circuit Breaker