Square D FHB36080-1021 Molded Case Circuit Breaker
- 80A
- 3 Pole
- I-Line
Quantity
Square D FHB36080-1021 - 80A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial power distribution, this 80A F-frame breaker provides reliable thermal-magnetic protection. The unit features a factory-installed 120-240VAC shunt trip mechanism for remote tripping capabilities. Designed to mount into Square D I-Line panelboards and switchboards, it utilizes a secure bolt-on connection. This legacy component is officially replaced by the HGA36080SA in modern applications. Delivering 25kAIC at 480VAC, it handles demanding loads.Specifications
| Brand | Square D |
|---|---|
| Part Number | FHB36080-1021 |
| Series | FHB |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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 | Lugs (AL100FA) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat does the -1021 suffix mean on the FHB36080-1021 circuit breaker?
The -1021 suffix indicates that this breaker includes a factory-installed 120/240VAC shunt trip accessory, allowing for remote tripping of the breaker.
Which panelboards are compatible with the FHB36080-1021?
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.
What wire sizes are accepted by the lugs on the FHB36080-1021?
When installing the FHB36080-1021, the standard lugs accept 14 to 1/0 AWG copper wire or 12 to 1/0 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
Can the FHB36080-1021 be used in DC applications?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is suitable for DC applications up to 250VDC, providing a 10kA interrupting rating for those systems.
Are the trip settings adjustable on the FHB36080-1021?
No, this breaker features fixed thermal (long-time) and fixed magnetic (instantaneous) trip functions, meaning the trip curve is factory-set and cannot be adjusted in the field.
Can the FHB36080-1021 replace older F-frame I-Line breakers?
Yes, as an F-frame I-Line breaker, it can replace older FA or FH I-Line breakers of the same amperage and pole configuration, provided the interrupting rating meets or exceeds your system requirements.
How does the shunt trip enhance safety on the FHB36080-1021?
The factory-installed 120/240VAC shunt trip allows the breaker to be tripped remotely. This is often used in emergency shutdown systems or interlocked with fire alarms to safely disconnect power during an emergency.
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