Siemens HHFXD63B250 Molded Case Circuit Breaker

No, the HHFXD63B250 is supplied without lugs. You will need to purchase and install the appropriate lug kits separately, such as the TA1FD350A, which is the standard aluminum body lug for 250A FD frame breakers.

The standard lug kit for this 250A FD frame breaker is the Siemens TA1FD350A. It accepts 6 AWG to 350 kcmil copper wire or 4 AWG to 350 kcmil aluminum wire.

The "HH" prefix designates this breaker as having the extra-high interrupting capacity for the Siemens Sentron FD frame. It provides a rating of 100kAIC at 480VAC and 200kAIC at 240VAC.

Yes, this thermal-magnetic breaker features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. The magnetic trip range can be adjusted between 1100A and 2500A.

This FD frame breaker is designed for use in Siemens P2, P3, P4, and P5 panelboards, as well as Siemens switchboards. Note that specific mounting hardware or strap kits may be required depending on the panelboard type.

Yes. Because the HHFXD63B250 features a non-interchangeable trip unit (indicated by the "X" in the catalog number), it is suitable for reverse feeding applications in accordance with UL 489 standards.

The primary difference is their interrupting capacity at 480VAC. The standard FXD63B250 is rated for 35kAIC, the high-interrupting HFXD63B250 is rated for 65kAIC, and the extra-high interrupting HHFXD63B250 is rated for 100kAIC. All three share the same physical FD frame and non-interchangeable trip unit.

The HHFXD63B250 is supplied from the factory without lugs, allowing you to select the appropriate termination kit for your application. The HHFXD63B250L includes factory-installed line and load side lugs.

No, the breaker itself does not include panelboard mounting hardware. When installing this FD frame breaker into Siemens P2, P3, P4, or P5 panelboards, you will need the appropriate strap kit or mounting assembly specific to your panelboard type.