Square D FA34050-1021 Molded Case Circuit Breaker
- 50A
- 3 Pole
- I-Line
Square D
FA34050-1021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA34050-1021
Quantity
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Square D FA34050-1021 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Featuring a factory-installed 120-240VAC shunt trip, the Square D FA34050-1021 allows operators to remotely open the circuit for enhanced safety. This 3-pole, 50A molded case circuit breaker utilizes thermal-magnetic technology for standard LI protection. The unit installs into Square D I-Line panelboards and switchboards via a robust plug-on connection. As a legacy F-Frame device, it is officially replaced by the PowerPact H-Frame HDA36050SA. It delivers 18 kAIC at 480VAC and is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Series | FA |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (120-240VAC) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489, Federal Specification W-C-375B/GEN |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Common Trip |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the FA34050-1021 circuit breaker?
The -1021 suffix designates a factory-installed 120/240VAC shunt trip accessory. This allows the breaker to be opened remotely via an external control signal, which is commonly used for emergency stop circuits or automated load shedding.
Can I install the FA34050-1021 in a standard Square D QO or Homeline load center?
No. This is an F-frame molded case circuit breaker with an I-Line plug-in connection. It is exclusively compatible with Square D I-Line panelboards and switchboards, not residential QO or Homeline load centers.
How does the I-Line mounting style work for the FA34050-1021?
The I-Line plug-in design allows the breaker to mount directly onto the panelboard bus stack. The line side connections are made automatically through the plug-on jaws, while the load side connections use the included mechanical lugs for wiring.
Is the Square D FA34050-1021 part of a current or legacy breaker series?
The FA series is a legacy F-frame circuit breaker. It serves as a direct replacement for existing I-Line commercial and industrial power distribution systems, allowing you to swap older units without upgrading the entire panelboard.
How does the thermal magnetic trip unit protect the circuit?
The fixed thermal element responds to prolonged overcurrents by heating up and tripping the breaker to prevent wire damage. The fixed magnetic element responds immediately to high-level short circuits, providing instantaneous fault protection.
Are the terminals on the FA34050-1021 rated for aluminum wiring?
Yes, the load side mechanical lugs are dual-rated for both copper and aluminum conductors. They accept wire sizes ranging from 14 AWG to 1/0 AWG.
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