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Siemens CFD63B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
CFD63B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
CFD63B125
Quantity
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Siemens CFD63B125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
The CFD63B125 is a high-performance 3-pole, 125A molded case circuit breaker belonging to the Siemens Sentron FD frame group. Designed for unit-mount installation, it fits perfectly into Siemens P1, P2, and P3 panelboards, motor control centers, and switchboards. This thermal-magnetic breaker provides robust long-time and instantaneous (LI) trip functions, boasting a massive 200kAIC interrupting rating at 480VAC. The current-limiting architecture ensures superior downstream equipment safety.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CFD63B125 |
| Series | CFD6 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Frame Type | CFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (P1, P2, P3), Switchboards, Motor Control Centers, Enclosures |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR Rated, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
7 answersWhich panelboards are compatible with the CFD63B125 breaker?
This breaker is designed for use in Siemens Sentron P1, P2, and P3 panelboards, as well as compatible switchboards, motor control centers, and standalone enclosures.
Does this breaker fit into standard residential load centers?
No, the CFD frame is an industrial molded case circuit breaker designed for commercial and industrial Sentron panelboards and switchboards. It is not compatible with standard residential load centers.
What wire sizes and materials are accepted by the terminals?
The lugs accept copper wire from 6 AWG to 350 kcmil and aluminum wire from 4 AWG to 350 kcmil. Ensure proper torque specifications are followed during installation.
Is the CFD63B125 a plug-in or bolt-on circuit breaker?
It is a unit mount, bolt-on circuit breaker. It requires bolted connections to the busbar or mounting assembly rather than snapping into place.
How does the trip unit operate on this FD frame breaker?
It features a thermal magnetic trip unit with fixed thermal and adjustable magnetic settings. This allows for precise tuning of the short-circuit response while maintaining a set overload threshold.
What type of protection does the LI trip function provide?
The LI designation indicates it delivers long-time protection against sustained overloads and instantaneous protection against severe short circuits, safeguarding your electrical system from thermal damage.
Can this breaker be used in DC applications?
Yes, it is rated for up to 500VDC with an interrupting capacity of 50kA, making it suitable for specific direct current systems alongside its standard AC ratings.
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