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Siemens HFD63B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Siemens
HFD63B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
HFD63B125
Quantity
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Siemens HFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens HFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HFD63B125 |
| Series | HFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | HFD |
|---|---|
| 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 |
Quantity
Siemens HFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HFD63B125-R |
| Series | HFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | HFD |
|---|---|
| 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 |
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Description
Designed for Siemens P1, P2, and P3 panelboards, this 125A molded case circuit breaker provides reliable overcurrent protection. The 3-pole device is a core component of the Sentron FD frame series. This bolt-on MCCB mounts into commercial switchboards and motor control centers. It is replaced by the 3VA5212-6EC31-0AA0, which requires a retrofit kit for older Sentron panels. With a 65kAIC rating at 480VAC, it offers high interrupting capacity and includes line and load lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HFD63B125 |
| Series | HFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | HFD |
|---|---|
| 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
5 answersWhat panels are compatible with the HFD63B125 circuit breaker?
This bolt-on breaker is designed for use in Siemens Sentron P1, P2, and P3 panelboards. It is also compatible with Siemens switchboards and motor control centers that accept FD frame breakers.
What is the difference between the HFD63B125 and the FD63B125?
The HFD63B125 is the high-interrupting version of the standard FD63B125. It provides a 65kAIC rating at 480VAC, whereas the standard FD frame offers a lower interrupting capacity for applications with lower available fault current.
What is the modern replacement for the HFD63B125?
Siemens is transitioning from the Sentron series to the 3VA series. The modern equivalent is the 3VA5212-6EC31-0AA0. However, installing a newer 3VA breaker into an older Sentron panelboard requires a specific retrofit hardware kit.
How does the adjustable magnetic trip function work on this breaker?
This breaker features an LI (Long-Time, Instantaneous) trip unit with a fixed thermal element and an adjustable magnetic element. The adjustable magnetic dial allows you to tune the instantaneous short-circuit trip threshold, which is useful for preventing nuisance tripping from motor inrush currents and for coordinating with downstream protection devices.
How should this 3-pole breaker be wired for 500VDC applications?
While the HFD63B125 is rated for 25kAIC at 500VDC, applying a 3-pole molded case circuit breaker on a direct current system typically requires wiring multiple poles in series to safely interrupt the DC arc. Always consult Siemens DC application guidelines and wiring diagrams for the correct pole configuration based on your system voltage.
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