Square D KDL32250 Molded Case Circuit Breaker

When equipped with standard AL250KD lugs, the required tightening torque is 300 lb-in (34 N-m) for both aluminum and copper conductors.

This unit-mount breaker is designed for use in Square D QO 3-phase load centers, commercial switchboards, and standalone Square D enclosures. Always verify the specific panel label for K-frame approval.

The KDL32250 features a thermal-magnetic trip unit with a fixed thermal response for overload protection and an adjustable magnetic element. This allows electricians to tune the instantaneous short-circuit response to accommodate specific loads, such as motor inrush currents.

No, the KDL32250 is a legacy K-frame circuit breaker that has been discontinued by Schneider Electric. Modern applications typically use the PowerPact series as a replacement, though exact cross-referencing depends on the specific panel and mounting requirements.

The LI code signifies that the breaker provides Long-Time (L) and Instantaneous (I) protection. The long-time function handles sustained overloads using a fixed thermal element, while the instantaneous function clears short circuits using the adjustable magnetic element.

No. Circuit breakers are not universally interchangeable across brands. This breaker must only be installed in Square D equipment that explicitly lists K-frame or KDL breakers as an approved type on the manufacturer label to maintain safety and UL compliance.

The KDL32250 supports several internal accessories for advanced control and signaling, including shunt trips, undervoltage releases, auxiliary switches, and alarm switches.

Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires specialized overcurrent protection.

No, this breaker features a non-interchangeable trip unit. The thermal-magnetic LI trip functions are factory-sealed within the molded case and cannot be modified or replaced in the field.