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Siemens HFD63B125L Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
HFD63B125L
Molded Case Circuit Breaker
Brand
Siemens
SKU
HFD63B125L
Quantity
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Siemens HFD63B125L - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial enclosures and switchboards, the Siemens HFD63B125L is a 3-pole, 125A molded case circuit breaker. It features a thermal-magnetic trip unit that delivers precise long-time and instantaneous protection. As a unit mount MCCB, it is designed for standalone enclosure mounting. The "L" suffix indicates that factory-installed line and load lugs are included. This FD frame breaker handles up to 600VAC and provides a high interrupting rating of 65kA at 480V.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HFD63B125L |
| Series | HFD6 |
| Amperage | 125A |
| 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 | Enclosures, Siemens Sentron Panelboards, Switchboards |
| 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, Alarm Switch, Undervoltage Release, Rotary Handle, Motor Operator, Mechanical Interlock |
|---|---|
| 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
7 answersWhat panels or enclosures are compatible with the HFD63B125L?
This FD-frame breaker is designed for use in Siemens Sentron panelboards (such as P1, P2, P3, P4, and P5 series), switchboards, motor control centers (MCCs), and individual enclosures. Specific mounting kits may be required depending on the panelboard type.
What does the "L" at the end of the HFD63B125L catalog number indicate?
The "L" suffix indicates that the breaker is supplied with factory-installed line and load side lug terminals.
What wire sizes do the factory-installed lugs accept?
The included line and load lugs accept 6 AWG to 350 kcmil copper wire, or 4 AWG to 350 kcmil aluminum wire.
Is the trip unit on the HFD63B125L adjustable?
This breaker features a thermal-magnetic trip unit with a fixed thermal setting for overload protection and an adjustable magnetic setting for short-circuit protection.
What does the "H" in the HFD63B125L catalog number stand for?
The "H" indicates that this is a High Interrupting capacity breaker within the FD frame family, offering a 65kA interrupting rating at 480VAC compared to standard FD breakers.
Can I replace an older ITE FD-frame breaker with the HFD63B125L?
Yes, Siemens Sentron FD-frame breakers are direct replacements for legacy ITE and Siemens-Allis FD-frame breakers of the same physical size and specifications. Verify your required interrupting ratings and panel mounting hardware before installing.
Is the HFD63B125L rated for use in DC applications?
Yes, this breaker is rated for use in DC systems up to 500VDC. When applying thermal-magnetic breakers in DC circuits, ensure proper pole wiring as per Siemens application guidelines.
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