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Square D QO miniature circuit breaker, single-pole paddle actuator, light grey plastic body, plug-in mount

SQUARE D

SQUARE D QO120VH 20A 1 Pole 120/240V circuit breaker

SKU CH-81Q2-YQZP8

A single-pole miniature circuit breaker rated 20 A, 120/240 V AC with a 22 kA interrupting capacity for QO load centres

  • High interrupting capacity protects circuits up to 22kA at 120/240V AC
  • Single-pole 20A rating handles standard 120/240V residential branch circuits
  • Plug-in mounting fits directly into compatible QO load centers and NQ panelboards
  • Pressure-plate terminals accept wire without special tools for secure connections
  • Compact 3in x .8in x 2.9in frame saves space in crowded panels

QO Series 20 A Breaker

The SQUARE D QO120VH is a single-pole miniature circuit breaker rated at 20 A for 120/240 V AC and 48 V DC. It plugs into QO load centres and NQ panelboards, providing high interrupting capacity protection for residential or light commercial branch circuits.

High Interrupting Thermal Protection

The breaker carries a 22 kA interrupting rating at 120/240 V AC, using a paddle actuator and pressure-plate terminals within a 100 A frame. Normal operation stays cool and quiet with no moving parts beyond the trip mechanism, drawing only the load current passed to the connected circuit.

Plug-In Fit for QO Panels

The unit measures 3 in long, .8 in wide and 2.9 in deep, matching the standard QO plug-in footprint. It requires a compatible QO or NQ panelboard slot and frees the installer from bolt-on wiring, while the single-pole width leaves adjacent spaces available for additional breakers.

Highlights

  • High interrupting capacity protects circuits up to 22kA at 120/240V AC
  • Single-pole 20A rating handles standard 120/240V residential branch circuits
  • Plug-in mounting fits directly into compatible QO load centers and NQ panelboards
  • Pressure-plate terminals accept wire without special tools for secure connections
  • Compact 3in x .8in x 2.9in frame saves space in crowded panels

Specifications

BrandSQUARE D

Questions about this item

How do I install the QO120VH breaker in a QO load center and what step is often missed?

Align the breaker with the bus stab, press firmly until it seats fully, then verify the paddle snaps into the locked position; the missed step is confirming the paddle locks rather than assuming it is seated.

What maintenance or replacement will the QO120VH need over time?

No routine maintenance is required; replace the breaker if it trips repeatedly without overload, shows discoloration at the pressure-plate terminals, or fails to reset after a fault.

What limit appears first during sustained loading on the QO120VH?

The 20 A thermal rating limits continuous current; the 22 kA interrupting capacity only applies during a short-circuit event, not during normal sustained operation.

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