Square D FJA140201 Molded Case Circuit Breaker
- 20A
- 1 Pole
- I-Line
Quantity
Square D FJA140201 - 20A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the legacy F-frame series, this 20A molded case circuit breaker delivers robust thermal-magnetic protection for commercial applications. It features a factory-configured Phase A connection and standard LI trip functions. Designed for Square D I-Line panelboards, it utilizes a plug-on mounting style. This unit is replaced by the HJA260201, which requires two pole spaces. With a 65kA interrupting capacity at 277VAC, it handles demanding faults and accepts 14-4 AWG copper wire.Specifications
| Brand | Square D |
|---|---|
| Series | FJA |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 277VAC, 10kA @ 125VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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 |
|---|---|
| Accessories | Load Side Lugs Included, Phase A Connection (Factory Configured) |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB 1, IEC 60947-2 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
7 answersWhat panelboards are compatible with the FJA140201 circuit breaker?
The FJA140201 is designed exclusively for use in Square D I-Line panelboards and switchboards. It features an I-Line style plug-in connection that mounts directly to the bus stack.
Can the FJA140201 be installed on a straight 480V ungrounded delta system?
No. This breaker is slash-rated for 480Y/277VAC. It is only suitable for solidly grounded wye systems where the line-to-ground voltage does not exceed 277V. It cannot be used on straight 480V delta or ungrounded systems.
How is the FJA140201 secured to the I-Line bus?
The breaker utilizes a plug-on jaw connection that engages the I-Line bus stack. It is then mechanically secured to the panel backpan using a retaining bracket and mounting screw to prevent movement.
What wire sizes are accepted by the load-side lugs on the FJA140201?
The factory mechanical lugs accept 14 AWG to 4 AWG copper (Cu) conductors, or 12 AWG to 4 AWG aluminum (Al) conductors.
What is the short-circuit interrupting rating (AIC) for this breaker?
The FJA140201 has a maximum interrupting rating of 65kAIC at 240VAC and 277VAC. It is also rated for 10kAIC at 125VDC.
Does the FJA140201 feature an adjustable trip unit?
No. This breaker is equipped with a fixed thermal-magnetic trip unit. Both the long-time and instantaneous (LI) trip functions are factory-set and non-adjustable.
Is the FJA140201 a current or legacy frame?
The FJA140201 is part of the legacy Square D F-frame molded case circuit breaker family. While the F-frame is a legacy design, it remains fully compatible with existing I-Line panelboards.
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