SQUARE D QOB220 Miniature Circuit Breaker, 20A, 2 Pole, 120/240VAC, 10KA, Bolt On Mount

Square D QOB220 circuit breaker is installed in distribution panels, control cabinets & load centers for safeguarding circuits against overloads and short circuits by quickly interrupting faulty currents. It is used in commercial and industrial electrical systems.

Working Mechanism:

• The thermal trip mechanism within the circuit breaker is intricately designed to react to continuous overcurrent situations.
• When the flow of current surpasses the designated threshold, the passing current imparts heat to a bi-metallic strip nestled within the breaker.
• This strip comprises two distinct metals, each possessing its own thermal expansion coefficient. As this strip warms up, the metals undergo varying degrees of expansion, inducing the strip to curve.
• This curving motion sets off the activation of the circuit breaker's internal latch system. Consequently, the contacts are disengaged, promptly halting the current flow.

Features:

• Square D QOB220 circuit breaker has a VisiTrip indicator to display tripping and interruption in the circuit.
• This Square D mini breaker provides 10kA breaking capacity for high tripping protection of the circuit.
• It offers a reliable trip-free toggle mechanism, ensuring that the breaker cannot be operated in the ON position during a fault for operational safety.
• This miniature circuit breaker comes with a positive handle indication, allowing users to easily identify its status.

Compatible Accessories:

• Square D HLO1 & QO1HPL Padlock Attachments: They are used to interlock the circuit breaker handles while limiting access and accidental tripping of the breaker.

Frequently Asked Questions:

Q. What wire size can this Square D QOB220 circuit breaker accommodate?

A. This HACR-rated Square D circuit breaker accommodates 14 - 8 AWG copper and aluminium wires.

Q. What is the ambient temperature of this Square D QOB220 circuit breaker?

A. It has an ambient temperature of 104 degrees F.

Q. What type of mounting is used in this Square D QOB220 circuit breaker?

A. This circuit breaker features bolt-on mounting that allows easy installation with rigidity.

Q. How to wire this Square D QOB220 circuit breaker?

A. It allows a lug orientation for straight-in wiring through bus bars, eliminating the need to pigtail wires and aid in organising the load center