ZINSCO QCAL-20 U 20A 240V 2-pole Molded Case Circuit Breaker QCAL20

Description:

The Zinsco QCAL-20 U is a 20 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 belongs to the QCAL (QC/QCAL series) and typically features a plug-in (snap-in) mounting style for installation in compatible panels. Product listings confirm it as a 20A, 240V, 2-pole breaker within the QCAL series.

Applications:

The Zinsco QCAL-20 breaker is commonly used in residential and light commercial electrical systems for 240V branch circuits such as small air conditioning units, pumps, water heaters, and dedicated appliance loads requiring 20A protection. It is specifically intended for legacy Zinsco panels and is mainly used today for maintenance or replacement of existing systems.

Technical Specifications:

• Manufacturer: Zinsco / GTE Sylvania
• Model / Part Number: QCAL-20 U / QCAL-20
• Product Type: Molded Case Circuit Breaker
• Poles: 2-Pole
• Current Rating: 20 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• Status: Obsolete / discontinued (surplus or aftermarket availability)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 UBIZ220 2-Pole 20A Zinsco Replacement Breaker
• Siemens Q220 2-Pole 20A Circuit Breaker
• Square D HOM220 / QO220 2-Pole 20A Circuit Breaker