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Siemens HFXD63B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
HFXD63B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
HFXD63B125
Quantity
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Siemens HFXD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens HFXD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HFXD63B125 |
| Series | HFXD6 |
| 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 |
| Frame Type | HFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5, S4, S5, SPP, FPP Panelboards, Switchboards |
| 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip |
Quantity
Siemens HFXD63B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | HFXD6 |
| 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 |
| Frame Type | HFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5, S4, S5, SPP, FPP Panelboards, Switchboards |
| 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip |
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Description
Engineered for commercial and industrial applications, the Siemens HFXD63B125 provides reliable thermal-magnetic protection with fixed thermal and adjustable magnetic trip settings. This 3-pole, 125A unit mount MCCB is rated for 600VAC and 500VDC systems, offering a high interrupting capacity of 65kA at 480V. It mounts into Siemens P1, P2, P3, P4, P5, S4, S5, SPP, and FPP panelboards. Note that this specific catalog number does not include lugs, requiring separate lug kits for termination.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HFXD63B125 |
| Series | HFXD6 |
| 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 |
| Frame Type | HFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5, S4, S5, SPP, FPP Panelboards, Switchboards |
| 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
9 answersWhich panelboards are compatible with the HFXD63B125 circuit breaker?
This unit is designed for use with Siemens P1, P2, P3, P4, P5, S4, S5, SPP, and FPP panelboards, as well as compatible Siemens switchboards.
What frame family does this circuit breaker belong to?
This breaker belongs to the Siemens FD frame group, specifically utilizing the HFD frame type construction.
What is the difference between the Siemens HFXD63B125 and the standard FXD63B125?
The H in the catalog number designates a high-interrupting capacity rating. The HFXD63B125 provides up to 65kAIC at 480VAC, whereas the standard FXD6 version has a lower interrupting rating. Both breakers share the exact same physical FD frame dimensions.
What does the LI trip function code mean on this breaker?
The LI code indicates that the trip unit provides Long-Time (L) and Instantaneous (I) protection. The long-time function protects against sustained overloads, while the instantaneous function trips the breaker during immediate short-circuit faults.
Does the trip unit offer adjustable settings?
Yes. While the thermal rating is fixed at 125 amps, the magnetic trip setting is adjustable. This allows you to fine-tune the instantaneous short-circuit protection threshold to suit your specific application.
Can this circuit breaker be used in DC power applications?
Yes, this breaker is rated for use in direct current systems up to 500VDC, offering a maximum interrupting capacity of 25kAIC.
How is the HFXD63B125 installed into an electrical panel?
This is a unit mount, bolt-on circuit breaker. It is secured directly to the panelboard bus or mounting pan using bolted connections rather than snapping into place.
Is this breaker interchangeable with older ITE brand models?
Yes. Siemens acquired ITE, and current Siemens FD frame breakers serve as direct replacements for legacy ITE breakers of the same frame size and specifications.
Does this breaker provide GFCI or AFCI protection?
No. It is equipped with a standard thermal-magnetic trip unit intended strictly for overcurrent and short-circuit equipment protection. It does not provide integral ground-fault or arc-fault protection.
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