Siemens FXD63B250 Molded Case Circuit Breaker

No, this model is typically shipped without lugs installed. If your application requires line and load lugs, you will need to purchase a compatible lug kit separately, such as the TA1FD350A, which accepts #6 AWG to 350 kcmil copper or aluminum conductors.

The FXD63B250 is designed for integration into Siemens Sentron P1, P2, and P3 panelboards, as well as Siemens switchboards, enclosures, and motor control centers.

Yes, this FD-frame molded case circuit breaker is UL listed for reverse-feed applications, offering flexibility for back-fed main breaker configurations.

When using this unit as a main breaker in an original Siemens P1 panelboard, the MBKFD3 mounting kit is required. For newer, revised P1 panelboards, you will need the MBKFD3A main breaker kit.

The thermal-magnetic LI (Long-Time, Instantaneous) trip unit provides continuous overload protection via a fixed thermal element, along with rapid short-circuit defense through an adjustable magnetic instantaneous setting.

It is part of the Siemens Sentron FD frame class. The FXD designation specifically denotes a unit-mount, bolt-on model with a standard interrupting capacity up to 600VAC within the broader FD frame group.

Yes, this breaker is rated for DC applications. It provides DC interrupting ratings of 30kA at 250VDC and 14kA at 500VDC, making it suitable for standard DC power distribution and 500VDC ungrounded UPS systems.

Yes, this breaker supports field-installable internal accessories. It can be equipped with compatible FD-frame shunt trips, undervoltage releases, auxiliary switches, and alarm switches to suit specific control schemes.