Square D FHB360801021 Molded Case Circuit Breaker
- 80A
- 3 Pole
- I-Line
Quantity
Square D FHB360801021 - 80A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering robust thermal-magnetic protection, this 80-amp F-frame breaker includes an integrated 120-240VAC shunt trip for remote disconnect applications. It serves commercial and industrial facilities requiring dependable circuit isolation. The device installs into standard Square D I-Line panelboards using a secure bolt-on connection. For facility upgrades, this specific model crosses over to the newer HGA36080SA. Rated for 65kAIC at 240VAC, it ensures high interrupting capacity.Specifications
| Brand | Square D |
|---|---|
| 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 | FH |
|---|---|
| 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 | Shunt Trip 120-240VAC (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhat does the 1021 suffix indicate on the FHB360801021 catalog number?
The 1021 suffix designates that this circuit breaker is equipped with a factory-installed 120/240VAC shunt trip, allowing the breaker to be tripped remotely for emergency disconnect or control applications.
What is the modern PowerPact replacement for the legacy FHB360801021?
When upgrading panels, this legacy F-Frame breaker crosses over to the newer Square D PowerPact H-Frame series. The direct functional replacement is catalog number HGA36080SA, which matches the 80A rating and includes the equivalent 120/240VAC shunt trip.
Can the FHB360801021 be used in standard load centers or NQ/NF panels?
No. This breaker features an I-Line plug-in connection and is specifically engineered for Square D I-Line panelboards and switchboards. It will not fit in standard QO load centers or NQ/NF series panels.
What wire sizes are supported by the terminals on the FHB360801021?
The factory lugs on this 80A breaker accept 14 AWG to 1/0 AWG copper (Cu) conductors, or 12 AWG to 1/0 AWG aluminum (Al) conductors.
Is the FHB360801021 suitable for direct current (DC) circuits?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for DC applications up to 250VDC, providing a 10kA interrupting capacity (AIC) for DC power systems.
How does the thermal-magnetic trip unit protect the circuit in this F-Frame breaker?
The trip unit provides two layers of protection: a fixed thermal element that responds to prolonged overloads (long-time protection) and a fixed magnetic element that trips instantaneously in the event of a severe short circuit.
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