Built for demanding environments, the Square D JDL36250LC is a 250A, 3-pole PowerPacT J-Frame MCCB offering reliable long-time and instantaneous (LI) protection. Designed for unit mounting, it fits into Square D motor control centers and switchboards. Factory-installed copper lugs ensure superior conductivity. Rated at 18kAIC at 480V, it handles substantial fault currents. The adjustable magnetic trip and Visi-Trip indicator simplify coordination and troubleshooting.
The LC suffix indicates that this breaker is equipped with factory-installed copper lugs (part number CU250JD) on both the line and load sides. Because of these specific lugs, the breaker is rated for copper conductors only.
What enclosures are compatible with the JDL36250LC?
This unit-mount PowerPacT J-Frame breaker is designed for installation in Square D industrial enclosures, switchboards, motor control centers, and control panels.
What wire size is accepted by the JDL36250LC terminals?
The factory-installed copper lugs accept copper wire sizes ranging from 1/0 AWG to 300 kcmil. Aluminum wire cannot be used with this specific model.
How does the trip unit on the JDL36250LC operate?
It utilizes a thermal-magnetic trip unit with fixed thermal and adjustable magnetic settings. This provides standard long-time and instantaneous (LI) protection, allowing you to fine-tune the short-circuit response for your specific application.
Can the JDL36250LC replace older Square D 250A breakers?
Yes, the PowerPacT J-Frame series is the designated replacement for legacy Square D 250A frames, such as the KA, KH, and KC series. Upgrading may require specific mounting hardware or retrofit kits depending on your existing panel configuration.
What does the D in the JDL36250LC catalog number represent?
The D indicates the breaker's interrupting rating tier within the PowerPacT J-Frame family. It provides a standard interrupting capacity of 18kA at 480V AC and 14kA at 600V AC.
How is the JDL36250LC mounted in a panel?
The L in the catalog number indicates it is a unit-mount breaker with lugs on both the line and load sides. It is secured with mounting screws and wired directly, rather than plugging into an I-Line busbar.
Can the JDL36250LC be used in DC applications?
Yes, this thermal-magnetic breaker is rated for use in DC circuits up to 250V DC, providing an interrupting capacity of 20kA.
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