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Zinsco UBIZ0250 50A two-pole circuit breaker, toggle actuator, grey plastic body, plug-in mount

Zinsco

Zinsco UBIZ0250 50A 2 Pole 120/240V Fuse

SKU CH-DAKJ-Q98HH

Protects circuits up to 50 A at 120/240 V AC with a 10 kA interrupting rating in Zinsco load centres

  • 50 A protection for 120/240 V circuits
  • 10 kA interrupting capacity clears faults safely
  • Plug-in mounting fits Zinsco ML12 load centers
  • Two-pole design handles single-phase power distribution
  • Compact 5.6 in frame saves panel space

Zinsco UBIZ0250 50A breaker for load centers

This Zinsco UBIZ0250 is a 50 A, two-pole miniature circuit breaker rated for 120/240 V AC. It uses a toggle actuator and a standard frame size of 125 A with HACR rating. The unit carries a 10 kA interrupting rating at the rated voltage. It is designed for single-phase electrical distribution panels.

Plug-in mounting for ML12 series panels

The breaker mounts by plug-in connection into compatible Zinsco ML12 load centers. A lug terminal provides the conductor attachment point. The DC voltage rating is not rated, so the device is limited to AC applications. Its narrow 0.8 in width allows dense placement within the panelboard.

50 A capacity with 10 kA short-circuit rating

The 50 A trip rating protects branch circuits up to that continuous load. The 10 kA AIR rating at 120/240 V AC defines the maximum fault current it can safely interrupt. Operating temperature minimum is 0 °F. The breaker does not carry a DC rating, limiting use to AC systems only.

Highlights

  • 50 A protection for 120/240 V circuits
  • 10 kA interrupting capacity clears faults safely
  • Plug-in mounting fits Zinsco ML12 load centers
  • Two-pole design handles single-phase power distribution
  • Compact 5.6 in frame saves panel space

Specifications

No published specifications for this item yet.

Questions about this item

How much fault current can the 50 A breaker interrupt before it must be replaced?

The UBIZ0250 is rated to interrupt up to 10 kA at 120/240 V AC, which is its maximum AIR rating.

How much heat does the breaker add to a panel when it carries full load continuously?

At 50 A the device dissipates only a few watts, so temperature rise inside a Zinsco ML12 load centre remains minimal during all‑day operation.

Which load‑centre series must already be installed for this breaker to plug in?

It is designed exclusively for Zinsco ML12 panelboards; the plug‑in mounting will not fit other series.

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