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Siemens FD63B125L Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
FD63B125L
Molded Case Circuit Breaker
Brand
Siemens
SKU
FD63B125L
Quantity
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Siemens FD63B125L - 125A 3 Pole Molded Case Circuit Breaker
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Description
Designed to reduce installation time, the Siemens FD63B125L is a 125A, 3-pole molded case circuit breaker that comes with factory-installed line and load lugs. It integrates easily into Siemens P1 (subfeed), P2, P3, P4, and P5 panelboards, as well as switchboards. Belonging to the Sentron FD frame series, it provides dependable long-time and instantaneous (LI) thermal-magnetic protection. This unit-mount breaker is rated for 600VAC and delivers a 35 kAIC interrupting capacity at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FD63B125L |
| Series | FD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC, 18kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1 (Subfeed), P2, P3, P4, P5 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
7 answersWhat panelboards are compatible with the FD63B125L?
This breaker is designed for use in Siemens P1 panelboards for subfeed applications, as well as P2, P3, P4, and P5 panelboards, switchboards, and motor control centers.
How does this breaker mount into the panel?
The FD63B125L is a unit-mount, feed-thru circuit breaker. It bolts directly to the chassis or mounting plate rather than plugging onto a bus.
Are lugs included with the FD63B125L?
Yes, the L suffix indicates that this breaker comes with factory-installed line and load side lugs (catalog number TA1FD350A).
What wire sizes do the standard lugs accept?
The included lugs accept 6 AWG to 350 kcmil copper wire, or 4 AWG to 350 kcmil aluminum wire.
What is the magnetic trip range for this 125A breaker?
The adjustable magnetic trip range for the FD63B125L is 900A to 1500A. The thermal trip is fixed at 125A.
Can the trip unit be swapped out later?
Yes, the FD63B125L features an interchangeable trip unit, allowing you to change the trip rating without replacing the entire breaker frame.
What is the difference between the FD63B125 and the FD63B125L?
The base FD63B125 does not include lugs, while the FD63B125L comes complete with factory-installed line and load lugs.
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