Square D SFA1020A Molded Case Circuit Breaker
- 20A
- 1 Pole
- I-Line
Square D
SFA1020A
Molded Case Circuit Breaker
Brand
Square D
SKU
SFA1020A
Quantity
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Square D SFA1020A - 20A 1 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial applications, the Square D SFA1020A is a 1-pole, 20A molded case circuit breaker. It features a factory-configured Phase A connection and provides reliable thermal-magnetic protection. This unit installs into Square D I-Line panelboards and serves as an exact replacement for older FA14020A models. Rated at 25kA AIC at 240VAC, this IEC-rated breaker delivers robust long-time and instantaneous (LI) trip functions for demanding environments.Specifications
| Brand | Square D |
|---|---|
| Part Number | SFA1020A |
| Series | SFA |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-4 AWG |
| 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 |
|---|---|
| Accessories | Phase A Connection (Factory Configured) |
| Standards | IEC 60947-2, UL 489 |
| Approval | IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | IEC Rated, Non-Interchangeable Trip, Phase A Connection |
Product FAQs
7 answersWhat panelboards are compatible with the SFA1020A circuit breaker?
The SFA1020A is designed specifically for Square D I-Line panelboards and switchboards. It features an I-Line style plug-in connection that mounts directly to the interior busbar assembly.
How does the I-Line plug-in connection work on this breaker?
The I-Line mounting system allows the breaker to plug directly onto the panelboard busbar using integrated jaws. This eliminates the need for cabled bus connections, providing a faster installation and a secure, factory-aligned contact.
What does the LI trip function indicate on the SFA1020A?
The LI designation means this thermal-magnetic breaker includes Long-Time (L) and Instantaneous (I) trip functions. The thermal component provides delayed tripping for sustained overloads, while the magnetic component trips immediately during a short circuit. Both settings are fixed on this model.
What wire sizes are accepted by the SFA1020A terminals?
The load-side lugs on this 20-amp breaker accept wire gauges from 14 AWG to 4 AWG. Electricians must select the appropriate conductor size within this range based on the circuit load and local code requirements.
What does the 25kAIC interrupting rating mean for this 20A breaker?
The 25kAIC rating indicates the maximum fault current this breaker can safely clear at 240V AC. It can interrupt up to 25,000 amps during a short circuit without sustaining internal damage or creating a safety hazard.
Can this 1-pole breaker be installed in a 3-phase I-Line panelboard?
Yes. Square D I-Line panelboards are designed to accommodate 1-pole, 2-pole, and 3-pole breakers on the same bus system. The SFA1020A will mount to the busbar and draw power from a single phase leg.
Does the SFA1020A require a neutral connection to the panelboard busbar?
No. As a 1-pole breaker, the SFA1020A connects only to a single phase leg of the I-Line busbar. The circuit neutral must be terminated separately on the panelboard neutral assembly.
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