SQUARE D QO110 Miniature Circuit Breaker, 10A, 1 Pole, 120/240VAC, 10KA, Plug In Mount

Square D QO110 miniature circuit breaker is designed to offer protection by quickly interrupting the current flow in the event of overloads or short circuits. It safeguards wiring, appliances and devices from damage caused by excessive current. The plug-on design simplifies installation, while the high short-circuit rating enhances safety.

Working Mechanism:

• Installed in breaker panels, it fits a single slot and connects to the circuit.
• It guards against overloads and short circuits.
• Inside, a bimetallic strip detects overcurrents.
• Under normal current, the strip remains straight.
• Higher current bends the strip due to uneven expansion.
• Bending trips the circuit breaker, cutting off the current.
• After tripping, it's manually reset to restore power.

Features:

• Square D QO110 miniature circuit breaker is equipped with a Visi-Trip indicator for visual indication of circuit breaker tripping & circuit interruption functions.
• It has plug-in design for easy installation.
• This Square D miniature circuit breaker has a positive handle indication for identifying whether the breaker is in the ON or OFF state.
• It can be operated at temperatures up to 104 degrees F.
• This MCB has an interrupting capacity of 10kA at 120 / 240VAC.

Frequently Asked Questions:

Q. What are the reasons for frequent tripping of the circuit breaker?

A. A short-circuiting, circuit overload, ground fault surges, defective circuit breaker or arc fault can cause tripping of the circuit breaker.

Q. Can QO110 MCB be used as a standalone protective device or should it be combined with other devices?

A. QO110 MCB can be used as a standalone protective device for individual circuits. However, for comprehensive protection, it can be combined with other devices such as ground fault circuit interrupters (GFCIs) and AFCIs.

Q. What are the points to inspect before operating this Square D QO110 MCB?

A.

• Keep the area around the breaker clean by using an enclosure. Remove the dust, dirt, grease, moisture, foreign contaminants or any safety hazards near the circuit breaker area.
• Check that the unit's mechanical linkages, like the toggle actuator, are free to move by switching the unit ON & OFF several times.
• Press the optional push-to-trip button at the bottom side of the unit to mechanically test the circuit breaker.
• Inspect the unit of any cracks, chipping, discolouration or any sign of overheating. Tighten the terminals & connectors. Check the mounting hardware.
• Check that the unit's mechanical linkages, like the toggle actuator, are free to move by switching the unit ON & OFF several times.
• Press the optional push-to-trip button at the bottom side of the unit to mechanically test the circuit breaker.
• Inspect the unit of any cracks, chipping, discolouration or any sign of overheating. Tighten the terminals & connectors. Check the mounting hardware.