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Siemens FXD63B125L Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
FXD63B125L
Molded Case Circuit Breaker
Brand
Siemens
SKU
FXD63B125L
Quantity
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Siemens FXD63B125L - 125A 3 Pole Molded Case Circuit Breaker
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Description
Part of the Sentron series, the Siemens FXD63B125L is a 3-pole, 125A molded case circuit breaker built for commercial and industrial power distribution. It delivers reliable thermal-magnetic protection with long-time and instantaneous (LI) trip functions. This unit mount MCCB installs into Siemens P1, P2, and P3 panelboards, Sentron switchboards, and motor control centers. It utilizes an FD frame footprint and includes line and load lugs (TA1FD350A). Rated for 35kAIC at 480V, it is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FXD63B125L |
| 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 | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Sentron Switchboards, Motor Control Centers, Sentron Enclosures |
| Wire Gauge | 6 AWG - 350 kcmil |
| 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, Motor Operator, Rotary Handle, Mechanical Interlock |
|---|---|
| Accessories | Line and Load Lugs (TA1FD350A) |
| 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, Trip-Free Mechanism |
Product FAQs
5 answersWhat is the difference between the Siemens FXD63B125 and the FXD63B125L?
The FXD63B125L includes factory-installed line and load lugs, whereas the standard FXD63B125 is supplied without lugs.
What enclosures and panelboards are compatible with the FXD63B125L?
This FD-frame breaker is designed for use in Siemens P1, P2, and P3 panelboards, as well as Sentron switchboards, motor control centers, and Sentron enclosures.
What wire sizes and materials are accepted by the lugs on this breaker?
The included lugs accept 6 AWG to 350 kcmil copper (Cu) conductors, and 4 AWG to 350 kcmil aluminum (Al) conductors.
What is the adjustable magnetic trip range for the FXD63B125L?
The instantaneous magnetic trip on this 125A breaker can be adjusted between 800A and 1500A.
Can the Siemens FXD63B125L be reverse fed?
Yes, this thermal-magnetic breaker is suitable for reverse feed applications.
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