Square D FCL34060-1021 Molded Case Circuit Breaker
- 60A
- 3 Pole
- Unit Mount
Quantity
Square D FCL34060-1021 - 60A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Featuring a factory-installed 120/240V shunt trip, the Square D FCL34060-1021 is a 60A, 3-pole current-limiting MCCB built for industrial applications. This legacy F-frame breaker utilizes a unit-mount configuration for Square D enclosures and switchboards. For modern upgrades, it is replaced by the HJL36060. Rated for 65kAIC at 480V, it uses fixed thermal-magnetic trip technology to minimize let-through energy and protect downstream electrical components.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCL34060-1021 |
| Series | FCL |
| Amperage | 60A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, Switchboards, Motor Control Centers |
| 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 | Line and Load 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 | Current Limiting, HACR Rated, Trip-Free Mechanism, Common Trip |
| Special Features | Current Limiting |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the FCL34060-1021 part number?
The -1021 suffix means this breaker is equipped with a factory-installed 120/240V AC shunt trip accessory. This allows the breaker to be opened remotely by applying a voltage signal to the shunt trip coil, which is commonly used for emergency stop or remote shutdown applications.
Can this F-Frame breaker be installed in an I-Line panelboard?
No, this is a unit mount, feed-thru breaker with line and load lugs. It does not have the plug-on jaw connections required for I-Line panelboards. It is designed for hardwired installation in Square D enclosures, switchboards, and motor control centers.
Are the line and load lugs included, and what wire sizes do they accept?
Yes, this feed-thru breaker comes standard with line and load side lugs. They accommodate 14 to 1/0 AWG copper or 12 to 1/0 AWG aluminum conductors. Electricians should ensure the wire is sized appropriately for the 60A rating and torqued to the specifications printed on the breaker faceplate.
What does the current limiting designation mean for the FCL series?
Current limiting breakers like the FCL series are engineered to clear a fault extremely fast. By interrupting the circuit before the fault current reaches its peak, they significantly reduce the let-through energy. This minimizes thermal and mechanical stress on downstream equipment during a short circuit.
Are the trip settings adjustable on the FCL34060-1021?
No, both the thermal (long-time) and magnetic (instantaneous) trip functions are fixed on this 60A breaker. The thermal element protects against gradual overloads, while the magnetic element provides immediate tripping during a short circuit.
How does the interrupting capacity change if this breaker is used on a 240V system?
While the breaker has a maximum rating of 480V AC with a 65kA interrupting capacity, it is fully rated for 240V AC systems. When installed at the lower 240V AC voltage, the interrupting capacity increases to 100kA.
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