Eaton / Challenger CF2020 Molded Case Circuit Breaker
- 20A
- 2 Pole
- Unit Mount
Quantity
Eaton / Challenger CF2020 - 20A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to maintain existing infrastructure, this 2-pole, 20A molded case circuit breaker is part of Eaton's legacy Challenger series. It provides essential thermal-magnetic protection for commercial facilities operating on 600VAC systems. The unit mount design integrates seamlessly into older Challenger, Westinghouse, and Eaton panelboards. For modern upgrades, this F-frame configuration crosses over to the FD2020 replacement model.Specifications
| Brand | Eaton / Challenger |
|---|---|
| Part Number | CF2020-R |
| Series | CF |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Challenger Panelboards, Eaton Panelboards, Westinghouse Panelboards |
| Wire Gauge | #14-1/0 AWG |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
9 answersWhich panelboards are designed to accept this CF frame breaker?
This breaker is engineered for compatibility with legacy commercial and industrial panelboards manufactured by Challenger, Westinghouse, and Eaton that are specifically configured for unit mount CF frame devices.
What wire sizes are accepted by the lugs on the CF2020?
The factory-installed lugs accommodate conductors ranging from 14 AWG up to 1/0 AWG. Installers must ensure proper torque is applied to the terminals to maintain a secure connection and prevent thermal issues.
How is the CF2020 secured inside an electrical enclosure?
This device features a unit mount configuration. It requires bolting directly to the backpan or mounting plate of the panelboard, rather than snapping onto a busbar like plug-on residential breakers.
Is this breaker suitable for direct current systems?
Yes, in addition to its AC ratings, this thermal magnetic breaker is certified for use in DC systems up to 250VDC, where it delivers a 10kA interrupting capacity.
What type of protection does the LI trip unit provide?
The LI designation indicates Long-Time and Instantaneous protection. The fixed thermal element handles Long-Time overload conditions, while the fixed magnetic element responds immediately to Instantaneous short-circuit faults.
What is the modern replacement for this legacy Challenger breaker?
The CF2020 is part of a legacy molded case circuit breaker family. For modern upgrades or replacements in compatible enclosures, Eaton's FD2020 is often used as the current F-frame equivalent.
Can I use this breaker to replace an older Westinghouse CF2020?
Yes. Because Eaton acquired the distribution equipment lines of both Westinghouse and Challenger, this CF2020 is a direct replacement for original Westinghouse and Challenger CF frame breakers sharing the same catalog number.
What safety functions does the thermal magnetic mechanism serve?
The thermal magnetic trip unit provides dual-level safety. The bimetallic thermal component prevents overheating from prolonged overloads, while the electromagnetic assembly quickly clears severe short circuits to protect downstream wiring.
Can this breaker be installed in systems with high available fault current?
It can be used in systems with up to 65kA of available fault current when operating at 240VAC. However, the interrupting capacity drops to 25kA at 480VAC and 18kA at 600VAC, so the system voltage must be evaluated during coordination.
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