Schneider Electric KAL361001021 Circuit Breaker

The 1021 suffix indicates that this circuit breaker includes a factory-installed 120/240V AC shunt trip. This accessory allows the breaker to be tripped remotely for emergency shutdown or control system integration.

The KAL series is a legacy K-frame molded case circuit breaker. For modern system upgrades, Schneider Electric recommends crossing this over to the PowerPact H-frame series. A direct functional replacement with a 120V AC shunt trip would be the HGL36100SA, though you must verify your specific fault current and mounting requirements.

This K-frame breaker is designed for installation in compatible Square D enclosures, switchboards, and motor control centers. It features a feed-thru connection type and mounts via lugs, meaning it is not designed for I-Line panelboards.

The standard lugs on this breaker accept wire sizes ranging from 4 AWG up to 350 kcmil. The terminals are rated for use with both aluminum and copper conductors.

Yes, in addition to its AC voltage ratings, this thermal-magnetic breaker is rated for 250V DC applications. It provides an interrupting capacity of 10kA at 250V DC.

While the thermal overload protection is fixed, the magnetic short-circuit protection is adjustable. This allows electricians to fine-tune the instantaneous trip threshold to coordinate with downstream devices and prevent nuisance tripping from motor inrush currents.

You can use the push-to-trip button located on the front face of the breaker. Pressing this button manually trips the mechanism, verifying that the internal linkages are operating correctly without requiring exposure to live electrical parts.

Yes, the 120/240V AC shunt trip requires its own control wiring to operate. When a voltage signal is applied to the shunt trip terminals, it activates a solenoid that mechanically trips the breaker.