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Siemens CFD63B125L Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Siemens
CFD63B125L
Molded Case Circuit Breaker
Brand
Siemens
SKU
CFD63B125L
Quantity
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Siemens CFD63B125L - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial applications, the Siemens CFD63B125L is a 3-pole, 125A molded case circuit breaker from the Sentron FD frame family. It delivers reliable long-time and instantaneous (LI) thermal-magnetic trip functions for heavy-duty electrical systems. This unit mount breaker installs into Siemens Sentron panelboards, switchboards, and motor control centers. Rated for an exceptional 200kAIC at 480VAC, this current-limiting device comes factory-equipped with lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CFD63B125L |
| 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 | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs |
| Standards | HACR Rated, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fuseless, HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
7 answersAre wire lugs included with the CFD63B125L breaker?
Yes, the L suffix in the catalog number indicates that line and load side lugs are factory installed. The terminals accept 6 AWG to 350 kcmil copper or 4 AWG to 350 kcmil aluminum conductors.
What makes the CFD63B125L different from standard FD frame breakers?
The C in the CFD6 prefix designates it as a fuseless current-limiting breaker. This allows it to achieve a much higher interrupting capacity, up to 200kAIC at 480V, without requiring inline fuses.
Can the CFD63B125L be used in DC power systems?
Yes, this thermal-magnetic breaker is rated for DC applications, providing a 50kAIC interrupting rating at up to 500VDC.
How is the trip unit configured on the CFD63B125L?
It features a non-interchangeable thermal-magnetic trip unit with a fixed thermal setting for long-time overloads and an adjustable magnetic setting for instantaneous short-circuit protection.
Which electrical distribution equipment is compatible with this breaker?
This unit-mount FD frame breaker is designed for installation in Siemens Sentron panelboards, switchboards, and compatible standalone enclosures.
What regulatory safety standards does this Sentron breaker meet?
The CFD63B125L is UL 489 Listed and complies with IEC 60947-2 standards for low-voltage molded case circuit breakers.
Does this breaker plug directly onto a panelboard bus?
No, the CFD63B125L is a unit-mount, feed-thru circuit breaker. It bolts directly to the mounting surface and requires wired connections on both the line and load sides.
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