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Square D QOB320SWN three-pole bolt-on circuit breaker, 20 A, 3.00 in wide

SQUARE D

SQUARE D QOB320SWN circuit breaker 20 A 3 pole 3.00 in

SKU CH-3KKW-J5R9X

Three-pole bolt-on circuit breaker rated 20 A with 3.00 in width

  • 20 A three-pole breaker handles standard three-phase loads
  • Bolt-on QOB320SWN model installs directly in Square D panels
  • Three-inch width fits standard panel spacing
  • 20 A rating provides reliable overcurrent protection

Three-pole bolt-on breaker for 20 A circuits

The Square D QOB320SWN is a new three-pole bolt-on circuit breaker rated at 20 A and 3.00 inches wide. It fits compatible Square D load centres and provides overcurrent protection for three-phase or multi-wire branch circuits. The device interrupts fault current to protect wiring and connected equipment.

Sustained-load behaviour at 20 A rating

Under continuous operation the breaker carries its full 20 A rating without nuisance tripping, while thermal and magnetic elements respond to prolonged overloads and short-circuit faults respectively. It is not suited for circuits requiring a higher ampacity or a different pole configuration. Buyers needing greater current capacity or a single-pole device should select an alternative model.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $123.99
Pricier than about 73% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSquare D
Model nameQOB320SWN

Questions about this item

How much heat or noise does the QOB320SWN produce when carrying 20 A continuously?

The breaker operates silently with no moving parts; heat rise stays within the limits defined for a 20 A, 3-pole bolt-on device in a compatible panel.

What panel or bus system must I already have for this 3-pole, 3.00-inch breaker to install correctly?

It requires a Square D QO load centre that accepts bolt-on, 3-pole breakers on 3.00-inch pole spacing.

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