Square D KH36175 Molded Case Circuit Breaker

No, the KH36175 is a legacy K-frame molded case circuit breaker that is no longer in active production. However, it remains a common component for servicing older electrical distribution systems without requiring a complete panel retrofit.

Facilities looking to upgrade to current technology can cross-reference this breaker to the Square D PowerPact JJA36175. This is a modern 175A I-Line breaker that fits the same panels while offering updated internal mechanisms and higher interrupting ratings.

This breaker utilizes Square D's I-Line plug-in mounting system. The line side features spring-loaded jaws that push directly onto the panelboard bus stack, while the load side relies on standard mechanical lugs for wire termination.

The KH36175 is strictly compatible with Square D I-Line panelboards and switchboards. It will not fit in standard load centers or bolt-on distribution panels due to its specialized plug-on phase connections.

The breaker features a thermal-magnetic trip unit. The thermal element provides fixed long-time protection against overloads, while the magnetic element features an adjustable dial to dial in precise instantaneous short-circuit protection.

Yes, in addition to standard AC systems, the KH36175 is rated for direct current applications up to 250VDC. In a DC system, it provides a maximum short-circuit interrupting capacity of 10kAIC.

The factory load side mechanical lugs are designed to accept copper or aluminum (Al/Cu) conductors ranging from 4 AWG up to 350 kcmil.

The KH36175 is factory calibrated for a standard ambient operating temperature of 40 degrees Celsius (104 degrees Fahrenheit). Environments consistently exceeding this threshold may require load derating to prevent nuisance tripping.