Square D FCL24020 Molded Case Circuit Breaker
- 20A
- 2 Pole
- Unit Mount
Quantity
Square D FCL24020 - 20A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the legacy F-frame series, this 20-amp molded case circuit breaker delivers robust protection for commercial and industrial applications. It is specifically designed to limit let-through energy during short circuits. The unit-mount configuration installs into compatible Square D switchboards, enclosures, and motor control centers. For modern upgrades, this component is officially replaced by the PowerPact HJL26020. Featuring a thermal-magnetic trip unit, it provides reliable protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCL24020 |
| Series | FCL |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Frame Type | FCL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 4 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, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Line and Load Side Lugs (AL50FA) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated |
| Special Features | Current Limiting |
Product FAQs
7 answersIs the Square D FCL24020 still an active product?
The FCL24020 is part of the legacy F-frame series. For modern upgrades or new installations, it has been superseded by the PowerPact H-frame series, specifically the HJL26020.
What does the current limiting designation mean for the FCL24020?
As a current limiting breaker, it is designed to significantly reduce the peak let-through energy during a severe short circuit. This helps protect downstream devices and wiring from excessive thermal and magnetic stress.
What types of equipment can the FCL24020 be installed in?
This unit mount breaker is compatible with traditional Square D enclosures, switchboards, and motor control centers that are designed to accept legacy F-frame breakers.
What wire sizes are accepted by the standard lugs on the FCL24020?
The factory line and load side lugs accept 14 to 4 AWG copper wire, or 12 to 4 AWG aluminum wire.
Can the FCL24020 be applied to 240V systems?
Yes. While it is rated for 480V systems with a 65kAIC interrupting capacity, it can also be safely applied to 240V systems where it provides a higher 100kAIC rating.
How does the FCL24020 mount into a panel or enclosure?
It features a unit mount, feed-thru design. This means it bolts directly to the mounting pan or enclosure backplate and wires via lugs, rather than plugging onto a busbar like an I-Line breaker.
How does the thermal magnetic trip unit in the FCL24020 operate?
The fixed thermal element provides long time protection against sustained overloads, while the fixed magnetic element delivers instantaneous tripping to quickly clear short circuits before they cause severe damage.
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