Square D KCL34200 Molded Case Circuit Breaker

Yes, the KCL34200 is designed as a unit-mount circuit breaker. It is compatible with Square D enclosures, switchboards, and panelboards that are configured to accept legacy K-frame molded case circuit breakers. Ensure your backpan or mounting bracket is drilled for standard K-frame spacing.

The KCL34200 is a legacy K-frame circuit breaker. When upgrading or replacing this unit, the Square D PowerPacT J-Frame series, specifically the JJL36200, is the direct modern equivalent. Note that adapter kits or new mounting hardware may be required depending on your specific panelboard or switchboard configuration.

No, this is a unit-mount breaker, meaning it requires physical fastening to a baseplate or backpan using standard mounting screws rather than plugging onto an I-Line bus. It requires wired connections on both the line and load terminals.

Yes, the KCL34200 features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The adjustable magnetic dial allows you to set the instantaneous short-circuit trip threshold to properly coordinate with downstream devices.

Yes. With an extra-high interrupting rating of 100kA at 240VAC and 65kA at 480VAC, the KCL34200 is engineered for commercial and industrial environments where available fault currents exceed standard industrial thresholds.

The LI trip code indicates Long-Time and Instantaneous protection. The Long-Time thermal function safeguards electrical wiring by preventing overheating during prolonged overloads. The Instantaneous magnetic function provides immediate tripping during a short circuit, shielding equipment and personnel from massive fault energy.

The factory-installed mechanical lugs accept either aluminum or copper (Al/Cu) conductors ranging from 4 AWG up to 350 kcmil. Ensure your wire size and insulation temperature rating match your specific load calculations and local electrical codes.