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Siemens CFD63B080 Molded Case Circuit Breaker
- 80A
- 3 Pole
- Unit Mount
Siemens
CFD63B080
Molded Case Circuit Breaker
Brand
Siemens
SKU
CFD63B080
Quantity
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Siemens CFD63B080 - 80A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial environments, the Siemens CFD63B080 is an 80A, 3-pole molded case circuit breaker. As part of the Sentron FD frame series, this fuseless current-limiting breaker restricts let-through energy during severe faults to protect downstream equipment. This unit-mount MCCB fits Siemens P1, P2, and P3 panelboards, switchboards, and motor control centers. Featuring a thermal-magnetic trip unit, it delivers robust protection with a 200kAIC rating at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CFD63B080 |
| Series | CFD6 |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 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 (Requires TA1FD350A) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism |
| Special Features | Current Limiting |
Product FAQs
6 answersWhat does the current limiting designation mean for the CFD63B080?
As a current limiting breaker, it clears short circuits extremely fast, typically within a half-cycle. This blow-apart contact action significantly reduces the let-through energy and peak current, providing enhanced protection for downstream equipment.
Which Siemens panels accept this FD-frame breaker?
The CFD63B080 is designed for installation in Siemens Sentron panelboards, including P1, P2, and P3 models, as well as compatible switchboards, motor control centers, and individual enclosures.
What wire sizes are supported by the standard lugs on this breaker?
The standard mechanical lugs accept 6 AWG to 350 kcmil copper wire, or 4 AWG to 350 kcmil aluminum wire.
What is the difference between Siemens FD6, HFD6, and CFD6 breakers?
These are all part of the Sentron FD frame family but feature different interrupting ratings. The standard FD6 is rated 35kA at 480VAC, the high-interrupting HFD6 is rated 65kA at 480VAC, and the CFD6 is the current limiting version rated at 200kA at 480VAC.
How does the trip unit operate on this 80A breaker?
It utilizes a thermal magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal element provides fixed overload protection, while the magnetic instantaneous trip is adjustable to help coordinate with specific inrush currents.
Is the CFD63B080 suitable for reverse feed applications?
Yes. Siemens CFD6 frame molded case circuit breakers are UL Listed for reverse feed applications, allowing power to flow from the load side to the line side when required.
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