Siemens HFD63B100 Molded Case Circuit Breaker

Yes. Siemens acquired I-T-E and maintained the same catalog numbering system for the Sentron FD frame series. The Siemens HFD63B100 is a direct, drop-in replacement for an older I-T-E HFD63B100.

The H in the HFD63B100 catalog number designates it as a High Interrupting capacity breaker. While standard FD frame breakers offer lower fault current ratings, the HFD63B100 provides a 65kAIC rating at 480VAC and 25kAIC at 600VAC.

The B in HFD63B100 indicates that the breaker is supplied complete with standard line and load lugs. A catalog number with an F suffix indicates a frame-only configuration that does not include lugs.

This FD frame breaker is designed for use in Siemens Sentron P1, P2, and P3 panelboards, as well as compatible Siemens switchboards and motor control centers.

The included TA1FD350A lugs accept 6 AWG to 350 kcmil copper wire, or 4 AWG to 350 kcmil aluminum wire.

This breaker features a thermal magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The magnetic trip threshold can be adjusted using the dial on the face of the trip unit to coordinate with other protective devices in your system.

No, the HFD63B100 is a bolt-on molded case circuit breaker designed to be bolted directly to the busbars in compatible Siemens panelboards, switchboards, or motor control centers. It is not designed for DIN rail mounting.

Yes, the HFD63B100 utilizes an interchangeable trip unit design. The 100A thermal magnetic trip unit can be removed and replaced if a different amperage or trip characteristic is required within the FD frame limits.