Siemens FXD63M125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
FXD63M125
Molded Case Circuit Breaker
Brand
Siemens
SKU
FXD63M125
Quantity
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Siemens FXD63M125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Part of the Sentron family, this 125-amp molded case circuit breaker provides long-time and instantaneous trip functions for industrial applications. The unit-mount configuration integrates seamlessly into Siemens P1, P2, and P3 panelboards as well as motor control centers. Featuring a 65kA interrupt rating at 240VAC and reverse feed capabilities, it serves as a robust solution for demanding electrical systems. Note that this FD frame model is superseded by the 3VA5212-5EC31-0AA0 series.Specifications
| Brand | Siemens |
|---|---|
| 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, 14kA @ 500VDC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (P1, P2, P3), Switchboards, Motor Control Centers |
| Wire Gauge | 6 AWG - 350 kcmil (Cu/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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 50C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, 50C Ambient Calibration |
Product FAQs
7 answersWhich Siemens panelboards accept the FXD63M125 circuit breaker?
This FD-frame breaker is compatible with Siemens Sentron P1, P2, and P3 panelboards, as well as Siemens switchboards and motor control centers.
What are the wire size and material requirements for the FXD63M125 lugs?
The factory-installed lugs accommodate conductor sizes from 6 AWG to 350 kcmil and are rated for both copper (Cu) and aluminum (Al) wiring.
How does the trip unit on the FXD63M125 operate?
It utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
What are the DC interrupting ratings for this breaker?
In addition to its AC ratings, the FXD63M125 is rated for DC applications, delivering 30kAIC at 250VDC and 14kAIC at 500VDC.
What mounting configuration does the FXD63M125 use?
It uses a unit-mount, bolt-on connection, which requires bolting the breaker directly to the busbars in compatible Sentron panels and switchboards.
Is the FXD63M125 suitable for reverse-feed applications?
Yes, this breaker supports reverse-feed applications because it features a non-interchangeable thermal-magnetic trip unit.
What is the difference between the FXD63B125 and the FXD63M125?
While both are 125A, 3-pole FD-frame breakers, the FXD63B125 has a fixed magnetic trip, whereas the FXD63M125 features an adjustable magnetic trip for fine-tuning instantaneous protection.
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