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Siemens HHFD63B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
HHFD63B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
HHFD63B125
Quantity
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Siemens HHFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens HHFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HHFD63B125 |
| Series | HHFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | HHFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| 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, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Current Limiting, Extra High Interrupting Capacity, Interchangeable Trip Unit, Trip-Free Mechanism |
Quantity
Siemens HHFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | HHFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | HHFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| 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, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Current Limiting, Extra High Interrupting Capacity, Interchangeable Trip Unit, Trip-Free Mechanism |
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Description
Providing robust industrial protection, the Siemens HHFD63B125 is a 3-pole, 125A molded case circuit breaker from the Sentron series. This unit mount breaker is compatible with Siemens panelboards and enclosures. For legacy upgrades, this model is replaced by the 3VA5212-7EC31-0AA0, requiring a specific retrofit kit. Equipped with a thermal-magnetic trip unit, it offers fixed thermal and adjustable magnetic (LI) protection. It carries an extra high 100kAIC rating at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HHFD63B125 |
| Series | HHFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | HHFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| 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, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Current Limiting, Extra High Interrupting Capacity, Interchangeable Trip Unit, Trip-Free Mechanism |
Product FAQs
7 answersWhat panelboards and enclosures accept the HHFD63B125?
This unit-mount breaker is designed for installation in Siemens Sentron panelboards, switchboards, and compatible NEMA enclosures that accept FD frame circuit breakers.
What is the difference between the FD63B125, HFD63B125, and HHFD63B125?
These models share the same physical FD frame footprint and 125A rating but differ in their interrupting capacity. The FD63B125 provides 35kAIC at 480V, the HFD63B125 provides 65kAIC at 480V, and the HHFD63B125 provides an extra-high 100kAIC at 480V.
What is the standard lug kit for this breaker, and what wire sizes does it accept?
The standard factory lug kit is the TA1FD350A. It accepts 6 AWG to 350 kcmil copper (Cu) conductors and 4 AWG to 350 kcmil aluminum (Al) conductors.
How does the adjustable magnetic trip on this breaker benefit panel builders?
The adjustable instantaneous (magnetic) trip setting allows electricians to fine-tune the breaker's response to short circuits. This improves selective coordination with downstream breakers, reducing the risk of nuisance tripping across multiple circuits.
Is the HHFD63B125 suitable for use as a feeder breaker?
Yes, Siemens FD frame breakers are designed for feeder-level protection in commercial and industrial distribution systems, supplying downstream panels, motor control centers, and switchboards.
Does this breaker provide ground fault or arc fault protection?
No, the HHFD63B125 is a standard thermal-magnetic breaker providing long-time and instantaneous (LI) overcurrent and short-circuit protection. It does not include integrated GFCI or AFCI functions.
Can I install this FD frame breaker in a space designed for an ED frame?
No, Siemens FD frame breakers have a larger physical footprint and higher capacity than ED frame breakers. They require panelboard mounting hardware and space specifically designed for the FD frame.
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