Square D QOB3202100 Circuit Breaker

This bolt-on circuit breaker is designed for installation in Square D NQ and NQOD panelboards. It secures directly to the busbar using a bolt-on connection, making it suitable for commercial and industrial environments where vibration or heavy use is a concern.

The 2100 suffix indicates that the breaker is equipped with a factory-installed alarm switch. This provides remote status indication by activating contacts upon a trip event, which is ideal for critical circuits requiring immediate fault notification.

The breaker features pressure plate terminals that accept 14 AWG to 8 AWG copper or aluminum conductors. Ensure proper torque is applied during installation as specified by the manufacturer guidelines for pressure plate connections.

Yes, in addition to its 120/240VAC rating, this breaker is rated for 48VDC applications with a 5kA interrupting capacity. This makes it versatile for specific control circuits or battery-backed systems requiring a 3-pole configuration.

Like many breakers in the QO and QOB series, this model features the Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, a highly visible red flag appears in the indicator window, allowing for quick identification of the faulted circuit.

For applications requiring a plug-on connection rather than a bolt-on mount, the equivalent Square D catalog number is QO3202100. This plug-on version is compatible with standard QO load centers while retaining the 20A rating and factory-installed alarm switch.

This breaker utilizes thermal-magnetic trip technology with fixed long-time and instantaneous (LI) functions. The thermal element protects against sustained overloads, while the magnetic element provides immediate tripping during short-circuit events.