Square D FC340801021 Molded Case Circuit Breaker
- 80A
- 3 Pole
- I-Line
Quantity
Square D FC340801021 - 80A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
The FC340801021 is a legacy 3-pole molded case circuit breaker designed by Square D for commercial and industrial applications. It provides thermal-magnetic protection with long-time and instantaneous (LI) trip functions. This F-frame breaker installs into Square D I-Line panelboards. It is replaced by the modern HJA36080, which requires a separate shunt trip accessory. Rated 65kAIC at 480VAC, it includes a factory-installed 120/240VAC shunt trip (1021 suffix) for remote tripping.Specifications
| Brand | Square D |
|---|---|
| Series | FC |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | FC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu) / 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity, Visual Trip Indicator |
Product FAQs
10 answersWhat does the "1021" suffix indicate on the FC340801021 circuit breaker?
The "1021" suffix indicates that this breaker includes a factory-installed 120/240VAC shunt trip accessory, allowing the breaker to be tripped remotely via a separate control circuit.
Which panelboards are compatible with the Square D FC340801021?
This F-frame breaker features an I-Line style plug-in connection and is designed exclusively for use in Square D I-Line panelboards and switchboards.
Can the FC340801021 replace an FA or FH series breaker in my I-Line panel?
Yes, Square D F-frame I-Line breakers (FA, FH, and FC) share the same physical dimensions and mounting footprint. The FC series simply offers a higher interrupting rating (65kAIC at 480V) than the FA or FH series, making it a suitable upgrade or replacement.
How does the interrupting rating of the FC340801021 change based on the system voltage?
The breaker is rated for 65kAIC at 480VAC and 277VAC. If used on a 240VAC system, the interrupting rating increases to 100kAIC. It is also rated for 10kAIC at 250VDC.
What wire sizes and materials are accepted by the lugs on the FC340801021?
The breaker accepts 14 AWG to 1/0 AWG copper (Cu) wire, or 12 AWG to 1/0 AWG aluminum (Al) wire.
Can I adjust the trip settings on the FC340801021?
No, this breaker features a thermal-magnetic trip unit with fixed long-time and fixed instantaneous trip functions. The trip settings cannot be adjusted in the field.
How does the FC340801021 mount into the panelboard?
It uses an I-Line style plug-in connection. The breaker snaps directly onto the I-Line bus stack, which eliminates the need for wire connections between the breaker and the bus.
Can the FC340801021 be used in DC electrical systems?
Yes, this breaker is rated for use in DC systems up to 250VDC, with an interrupting rating of 10kAIC.
What does the "LI" trip function code mean on this breaker?
The "LI" code indicates that the thermal-magnetic trip unit provides Long-Time (L) protection against overloads and Instantaneous (I) protection against short circuits.
What frame size is the FC340801021?
This breaker belongs to the Square D F-Frame family, specifically the FC frame type.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
- AMAlan M.ReviewingSquare D FC34050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/25/21Breaker Order
All units were as described and sent quickly.
- JLJon L.ReviewingSquare D FC34030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/10/20SQ D Breaker
Needed an older breaker for a last minute job. Super Breakers had it in stock and it was in my hands in 2 days. Saved the day.