Siemens CLF63B250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
Quantity
Siemens CLF63B250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to handle heavy electrical loads, the Siemens CLF63B250 is a 3-pole, 250-amp molded case circuit breaker from the legacy CLF series. It utilizes a thermal-magnetic trip unit to provide reliable long-time and instantaneous overcurrent protection. This F-Frame breaker bolts into Siemens Sentron panelboards and switchboards for industrial applications. It boasts an exceptional 200kAIC interrupting capacity at 240VAC and 150kAIC at 480VAC. This unit is replaced by the CFD63B250.Specifications
| Brand | Siemens |
|---|---|
| Series | CLF |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 150kA @ 480VAC, 100kA @ 600VAC |
| Frame Type | CLF |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards |
| 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 |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Non-Interchangeable Trip |
Product FAQs
6 answersWhat type of panels are compatible with the CLF63B250 circuit breaker?
This F-frame breaker is designed to bolt directly into Siemens Sentron panelboards and switchboards.
Is there a modern replacement for the legacy CLF63B250?
Yes, the CLF63B250 is a legacy model that has been directly replaced by the Siemens CFD63B250 molded case circuit breaker.
What does the CLF frame designation indicate about this breaker?
The CLF prefix indicates that this is a Current Limiting F-Frame breaker. Current limiting breakers clear faults in a fraction of a cycle, significantly reducing the let-through energy and minimizing thermal and mechanical stress on downstream equipment.
Can the trip unit on the CLF63B250 be swapped out for a different rating?
No, this breaker features a non-interchangeable trip unit. The thermal magnetic trip mechanism is factory sealed and cannot be modified or replaced in the field.
How is the instantaneous trip function adjusted on this breaker?
The CLF63B250 features a fixed thermal and adjustable magnetic trip unit. The magnetic trip threshold can be adjusted using the dial located on the front face of the breaker to coordinate with downstream loads.
What safety standards and approvals apply to the CLF63B250?
This breaker is UL listed and CSA approved. It meets UL 489, CSA C22.2 No. 5, and IEC 60947-2 standards for molded case circuit breakers.
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