Designed to support commercial distribution networks, this 70-amp three-pole breaker utilizes fixed thermal and adjustable magnetic trip settings. It connects into Siemens Sentron P1, P2, and P3 panelboards, providing a reliable bolt-on solution for legacy infrastructure. With a robust 65kAIC rating at 480VAC, the unit includes factory-installed load lugs and supports reverse feeding. While superseded by the 3VA5 series, this exact frame remains essential for maintaining existing enclosures.
CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489
Approval
CE, CSA, UL
Temp Rating
40C
Construction Features
HACR Rated, High Interrupting Capacity, Interchangeable Trip Unit, Reverse Feed
Product FAQs
5 answers
Which Siemens enclosures are compatible with the HFD63B070?
This bolt-on breaker is designed for Siemens Sentron panelboards, specifically the P1, P2, and P3 series. It is also compatible with Siemens switchboards and motor control centers.
What is the difference between the standard FD63B070 and the HFD63B070?
The HFD63B070 is the high interrupting capacity version of the standard FD63B070. Both utilize the same physical FD frame footprint, but the HFD model provides a 65kA interrupting rating at 480VAC, whereas the standard FD model is rated for 35kA.
How is the trip unit configured on this model?
It utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit response.
What are the wire size limits for the standard lugs?
The factory lugs accept 6 AWG to 350 kcmil copper wire, or 4 AWG to 350 kcmil aluminum wire.
Can the HFD63B070 be applied in DC circuits?
Yes, it is rated for DC applications up to 500VDC with a 25kA interrupting capacity. Always verify pole wiring configurations required by the manufacturer for DC installations.
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