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Siemens FXD63B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
FXD63B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
FXD63B125
Quantity
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Siemens FXD63B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Siemens FXD63B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | FXD63B125 |
| Series | FXD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC, 30kA @ 250VDC, 18kA @ 500VDC |
| Frame Type | FXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| 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, Rotary Handle, Motor Operator |
|---|---|
| Accessories | No Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Quantity
Siemens FXD63B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | FXD63B125-R |
| Series | FXD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC, 30kA @ 250VDC, 18kA @ 500VDC |
| Frame Type | FXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| 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, Rotary Handle, Motor Operator |
|---|---|
| Accessories | No Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Description
Integrating into commercial distribution networks, this 125A Sentron series breaker offers robust thermal-magnetic protection. The unit-mount configuration fits perfectly into Siemens P1, P2, and P3 panelboards, as well as compatible switchboards and motor control centers. Delivering a 65kAIC rating at 240V, this FD-frame component utilizes a non-interchangeable trip unit. It requires separate lug kits for wire termination and serves as a replacement for legacy F-frame installations.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FXD63B125-R |
| Series | FXD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC, 30kA @ 250VDC, 18kA @ 500VDC |
| Frame Type | FXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| 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, Rotary Handle, Motor Operator |
|---|---|
| Accessories | No Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
9 answersWhat is the adjustable magnetic trip range for the FXD63B125?
The magnetic trip setting on this 125A Sentron FD frame breaker is adjustable from 800A to 1500A. The thermal protection element is fixed.
Are terminal lugs included with the FXD63B125, and which lugs are compatible?
This catalog number typically ships without lugs installed. For wire terminations, use lug kit TA1FD350A for aluminum or copper wire, or TC1FD350 for copper wire only. Both accept wire sizes from #6 AWG to 350 kcmil.
Can the Siemens FXD63B125 be reverse fed?
Yes. The FXD63B125 features a non-interchangeable trip unit and is UL listed for reverse feed applications.
Which Siemens enclosures and panelboards will accept the FXD63B125?
This FD frame molded case circuit breaker is designed for unit mount installation in Siemens P1, P2, and P3 panelboards, as well as compatible switchboards and motor control centers.
Can this breaker be used in DC power applications?
Yes. The FXD63B125 is rated for DC systems up to 250VDC standard. When properly wired, it is also UL listed for use on 500VDC ungrounded UPS systems.
What is the difference between the Siemens FXD63B125 and the FD63B125?
Both are standard capacity 125A FD frame breakers. However, the FXD63B125 features a factory assembled, non-interchangeable trip unit, while the FD63B125 has an interchangeable thermal magnetic trip unit that can be swapped in the field.
Is there a higher interrupting capacity version of this breaker?
Yes. If your system requires a higher fault current rating, the HFD63B125 or HFXD63B125 provides 65kAIC at 480V. Both share the exact same physical footprint and panelboard mounting configuration as the standard FXD63B125.
Can the FXD63B125 be equipped with field accessories like a shunt trip?
Yes, this Sentron FD frame breaker supports internal accessories including shunt trips, auxiliary switches, and undervoltage releases. External accessories like rotary handles and motor operators are also compatible.
Is the FXD63B125 a 100% rated circuit breaker?
No. Like most standard molded case circuit breakers, the FXD63B125 is 80% rated. It must be sized so that the continuous load does not exceed 80% of its 125A rating (100A maximum continuous load) per NEC guidelines.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
3 reviews
- CRCarlos R.Rated 5 out of 5 stars4/2/21I was extremely happy with
I was extremely happy with the service and prompt delivery of my purchase.
I will defiantly look your way no my next project.
- DSDouglas S.Rated 5 out of 5 stars11/6/20On time just as ordered
On time just as ordered
- TLTed L.Rated 5 out of 5 stars2/14/17good price
will buy again