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Zinsco UBIZ2020 tandem breaker, white plastic, toggle switch, plug-in mount, 4.8 by .8 by 2.5 inches

Zinsco

Zinsco UBIZ2020 Miniature Circuit Breaker 20/20A 1 Pole

SKU CH-QHKQ-TBKV2

A tandem miniature circuit breaker rated 20/20 A at 120 V AC with a 10 kA interrupting rating, plug-in mounting and a toggle actuator for single-phase Zinsco ML12 load centres

  • Tandem design fits two 20 A circuits in one pole space
  • 10 kA interrupting rating handles fault currents up to 10 kA at 120 V AC
  • Plug-in mounting allows quick installation in compatible Zinsco load centers
  • Toggle actuator provides clear on/off indication for each circuit
  • Compact 4.8 in length suits tight panelboard layouts

Zinsco UBIZ2020 Tandem Breaker

The Zinsco UBIZ2020 is a miniature circuit breaker rated at 20/20A with a single-pole tandem design. It operates at 120V AC and fits Zinsco ML12 series load centers via a plug-in mounting style. The unit features a toggle actuator and lug terminal connections within a 50A frame size.

Electricians Maintaining Zinsco Panels

This breaker suits professionals servicing existing Zinsco load centers that require a tandem configuration in a single pole space. It is not for installers working with modern panel brands or those needing a standard single-circuit breaker. Buyers needing DC-rated protection or a higher AIR rating should look elsewhere.

20/20A Tandem Amperage Configuration

The defining specification is the 20/20A tandem amperage rating, which provides two 20A circuits within one pole position. This specific configuration determines compatibility with the ML12 series panelboard and the 10kA interrupting rating at 120V AC. Verify the panel requires this exact tandem layout before purchase.

Highlights

  • Tandem design fits two 20 A circuits in one pole space
  • 10 kA interrupting rating handles fault currents up to 10 kA at 120 V AC
  • Plug-in mounting allows quick installation in compatible Zinsco load centers
  • Toggle actuator provides clear on/off indication for each circuit
  • Compact 4.8 in length suits tight panelboard layouts

Specifications

BrandZINSCO

Questions about this item

Which Zinsco UBIZ2020 variant matches a 20/20 A tandem requirement?

This single model is a 1-pole tandem breaker rated 20/20 A at 120 V AC with a 10 kA interrupting rating, designed for Zinsco ML12 load centres.

What does the 20/20 A rating mean when the breaker is installed?

Each pole carries up to 20 A on a 120 V AC circuit; the tandem frame fits one panel slot while providing two independent 20 A circuits.

How does the plug-in mounting and 10 kA rating limit real-world use?

The plug-in design fits Zinsco ML12 panels only, and the 10 kA AIR at 120 V AC caps the maximum prospective fault current the breaker can safely interrupt.

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