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Square D FCL34050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Square D
FCL34050
Molded Case Circuit Breaker
Brand
Square D
SKU
FCL34050
Quantity
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Square D FCL34050 - 50A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D FCL34050 - 50A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FCL34050 |
| Series | FCL |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Frame Type | FCL |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included |
| 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 |
Quantity
Square D FCL34050 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FCL34050-R |
| Series | FCL |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Frame Type | FCL |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included |
| 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 |
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Description
Built for demanding industrial applications, the Square D FCL34050 is a 3-pole, 50A molded case circuit breaker. It delivers robust thermal-magnetic protection for commercial systems and motor control centers. This unit-mount breaker installs into compatible Square D enclosures and switchboards. It serves as a legacy F-frame device, which has been replaced by the newer HJL36050 model for modern upgrades. The breaker features a 65kAIC rating at 480V and limits let-through energy.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCL34050 |
| Series | FCL |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Frame Type | FCL |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included |
| 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
7 answersWhat type of enclosures or panels accept the FCL34050 circuit breaker?
This unit mount breaker is designed for installation in compatible Square D enclosures, switchboards, and motor control centers. It mounts directly to a backpan rather than plugging into a busbar.
What does the current limiting feature on the FCL34050 do?
The current limiting design restricts the let-through energy and peak current during a short circuit. This minimizes potential thermal and mechanical damage to downstream circuits and equipment.
Is the Square D FCL34050 still an active product line?
The FCL series is a legacy F-frame molded case circuit breaker. For modern upgrades or direct replacements, Square D typically recommends the PowerPact H-frame series, such as the HJL36050, depending on your specific panel requirements.
How does a unit mount breaker like the FCL34050 install into a system?
Unit mount breakers are feed-thru devices that bolt directly to a backpan or mounting plate using screws. They do not plug onto a busbar like I-Line panelboard breakers.
What are the lug wire size and material requirements for the FCL34050?
The factory lugs accommodate 14 to 1/0 AWG copper conductors or 12 to 1/0 AWG aluminum conductors. Ensure conductors are properly torqued according to the manufacturer label on the breaker face.
Can the trip settings on the FCL34050 be adjusted in the field?
No. This breaker features a fixed thermal magnetic trip unit. Both the long-time overload protection and the instantaneous short circuit protection are factory set and cannot be modified.
What safety precautions apply when replacing a legacy F-frame breaker?
Always de-energize the switchboard or motor control center before servicing. Verify that the replacement breaker matches the required trip functions, voltage, and interrupting capacity of the original installation.
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