Square D QHB130 Miniature Circuit Breaker

The QHB130 is a bolt-on circuit breaker designed specifically for use in Square D NQ and legacy NQOD panelboards. It is not compatible with standard QO load centers or Homeline panels.

No. The QHB130 is a bolt-on breaker and will not fit in a standard QO load center, which only accepts plug-on breakers. It must be installed in a commercial panelboard designed for bolt-on connections.

Both are 30A, 1-pole bolt-on breakers for NQ panelboards, but they have different interrupting ratings. The QHB130 features a high interrupting capacity of 65kAIC at 120/240VAC, whereas the standard QOB130 is rated for 10kAIC. A QOB130 cannot be used as a substitute unless the system's available fault current is under 10,000 amps.

Bolt-on breakers secure directly to the panelboard busbar with a screw, providing a highly secure, vibration-resistant connection. This mechanical fastening is typically required in commercial and industrial environments, and is mandatory for seismic-certified panelboard installations.

The 65kAIC rating indicates that the breaker can safely interrupt up to 65,000 amps of short-circuit fault current without sustaining internal damage. This high interrupting capacity is often required in commercial facilities with large transformers and high available fault current.

The LI designation indicates that the thermal-magnetic trip unit provides both Long-Time and Instantaneous protection. The long-time function protects against sustained mild overloads, while the instantaneous function trips the breaker immediately during a severe short circuit.

Yes, the QHB130 is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment that requires this specific type of inverse-time overcurrent protection.