ZINSCO QCAL-30 U 30A 240V 2-pole Molded Case Circuit Breaker QCAL30

Description:

The Zinsco QCAL-30 U is a 30 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. This breaker is part of the QCAL (QC/QCAL series) and features a plug-in (snap-in) mounting style for installation in compatible panels. Product listings confirm it as a 30A, 240V, 2-pole breaker within the QCAL series.

Applications:

The Zinsco QCAL-30 breaker is commonly used in residential and light commercial electrical systems for 240V branch circuits such as air conditioning units, water heaters, pumps, and compressors requiring 30A protection. It is specifically intended for legacy Zinsco panels and is typically used today for maintenance or replacement of existing installations rather than new builds.

Technical Specifications:

• Manufacturer: Zinsco / GTE Sylvania
• Model / Part Number: QCAL-30 U / QCAL-30
• Product Type: Molded Case Circuit Breaker
• Poles: 2-Pole
• Current Rating: 30 Amps
• Voltage Rating: 240 VAC
• Mounting: Plug-in / Snap-in (QC/QCAL series)
• Trip Type: Thermal-magnetic
• Interrupt Rating: ~10 kAIC @ 240V (typical class)
• Function: Overcurrent and short circuit protection
• Status: Obsolete / discontinued (surplus or aftermarket availability)

Common Replacements:

• Connecticut Electric UBIZ230 2-Pole 30A Zinsco Replacement Breaker
• Siemens Q230 2-Pole 30A Circuit Breaker
• Square D QO230 2-Pole 30A Circuit Breaker