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Siemens HFD63B175L Molded Case Circuit Breaker
- 175A
- 3 Pole
- Unit Mount
Siemens
HFD63B175L
Molded Case Circuit Breaker
Brand
Siemens
SKU
HFD63B175L
Quantity
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Siemens HFD63B175L - 175A 3 Pole Molded Case Circuit Breaker
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Description
Designed for standalone industrial applications, this 175A unit-mount breaker features factory-installed line and load lugs for immediate wire termination. It mounts securely into control panels and switchgear rather than bolting onto a traditional busbar. Delivering a robust 65kA interrupting capacity at 480VAC, the HFD63B175L utilizes fixed thermal and adjustable magnetic trip settings. Note that this legacy Sentron model is officially replaced by the newer 3VA5217-6EC31-0AA0 frame.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HFD63B175L |
| Series | HFD6 |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards (P1, P2, P3), Switchboards, Motor Control Centers |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs Included (TA1FD350A) |
| Standards | 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 |
Product FAQs
6 answersWhat panelboards are compatible with the HFD63B175L?
This unit mount breaker is designed for installation in Siemens Sentron P1, P2, and P3 panelboards, as well as compatible Siemens switchboards and motor control centers. It bolts directly to the mounting surface rather than plugging into a busbar.
What wire sizes do the factory lugs accept?
The included line and load side lugs accommodate 6 AWG to 350 kcmil copper conductors, or 4 AWG to 350 kcmil aluminum conductors. Always verify the required torque settings printed on the breaker label before finalizing connections.
How does the adjustable magnetic trip function operate?
The HFD63B175L 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 protection. The adjustable dial allows electricians to fine-tune the instantaneous trip point to handle specific motor inrush currents or coordinate with downstream breakers.
What does the L suffix in HFD63B175L indicate?
The L at the end of the catalog number signifies that the breaker is supplied with factory-installed lugs on both the line and load sides. Breakers without this suffix may require lugs to be purchased and installed separately.
What is the difference between the FD63B175 and HFD63B175L?
The H prefix designates this as the high-interrupting capacity version of the standard FD frame. While the standard FD63B175 offers a 35kA interrupting rating at 480VAC, the HFD63B175L provides a 65kA rating at 480VAC. Both breakers share the same physical footprint and mounting requirements.
Can the HFD63B175L be used in DC electrical systems?
Yes, this breaker is rated for use in direct current applications up to 500VDC, where it provides an interrupting capacity of 25kA. This makes it suitable for industrial DC control circuits, battery backups, and specific solar applications.
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