Siemens HJXD63B250 Molded Case Circuit Breaker

This Sentron JD-frame breaker is designed for installation in Siemens P4 and P5 panelboards, as well as compatible Siemens switchboards.

By default, Siemens HJXD6 series breakers are shipped without lugs. Standard aluminum line and load lugs for this frame are part number TA2J6500 (accepting 3/0 AWG to 500 kcmil copper or 4/0 AWG to 500 kcmil aluminum wire) and must be ordered separately unless an L suffix is specified in the catalog number.

While the thermal overload protection remains fixed at 250 amps, the adjustable magnetic element permits electricians to fine-tune the instantaneous short-circuit trip point. This helps coordinate the breaker with motor inrush currents or downstream protective devices without nuisance tripping.

The H designation indicates a high interrupting capacity. The standard JXD63B250 is rated for 35kAIC at 480VAC, whereas the HJXD63B250 delivers a higher interrupting rating of 65kAIC at 480VAC for commercial or industrial systems requiring greater fault current protection.

Yes. Because it is assembled with a non-interchangeable trip unit, this breaker is UL listed for reverse feed applications, allowing power to flow from the load terminals to the line terminals when system design requires it.

Yes, this thermal-magnetic breaker is rated for use on DC systems, providing up to 25kAIC interrupting capacity at 500VDC. It is commonly used in ungrounded battery backups, UPS systems, and industrial DC power networks.

Yes, this breaker is HACR rated, meaning it is certified to safely provide overcurrent and short-circuit protection for commercial heating, air conditioning, and refrigeration equipment circuits.

No, the X in the HJXD prefix indicates that this is a factory-assembled breaker with a non-interchangeable trip unit. If future amperage adjustments are anticipated, you must use a standard HJD frame and purchase the trip units separately.