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Square D FCL34070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Unit Mount
Square D
FCL34070
Molded Case Circuit Breaker
Brand
Square D
SKU
FCL34070
Quantity
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Square D FCL34070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D FCL34070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FCL34070 |
| Series | FCL |
| Amperage | 70A |
| 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 FCL34070 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FCL34070-R |
| Series | FCL |
| Amperage | 70A |
| 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 industrial networks, the Square D FCL34070 is a 70A, 3-pole current-limiting MCCB. It provides essential thermal-magnetic protection. Designed with a unit-mount configuration, this legacy F-frame breaker installs into Square D enclosures and switchboards. It is replaced by the HJL36070. The current-limiting capability restricts peak let-through current during short circuits, significantly reducing thermal stress on connected downstream equipment.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCL34070 |
| Series | FCL |
| Amperage | 70A |
| 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
6 answersWhat enclosures and panels are compatible with the FCL34070?
This unit-mount F-frame breaker is designed for installation in individual Square D enclosures, switchboards, and motor control centers that accept feed-thru F-frame breakers.
What does the current-limiting designation mean for the FCL34070?
As a current-limiting breaker, the FCL34070 clears faults extremely fast to restrict peak let-through current. This significantly reduces thermal and magnetic stress on connected downstream equipment during a short circuit.
Is the Square D FCL34070 obsolete, and what is the modern replacement?
Yes, the legacy F-frame FCL series is obsolete. It is typically replaced by the PowerPact H-frame series, specifically the HJL36070, for most applications. Always verify panel fitment and mounting requirements before upgrading.
What is the recommended lug torque for the FCL34070?
The standard AL100FA lugs used on this 70A F-frame breaker require a tightening torque of 50 in-lbs (5.6 N-m) for 14-1/0 AWG wire. Always verify the exact torque specifications printed on the breaker label before installation.
What disconnect mechanism is required when mounting the FCL34070 in a variable depth enclosure?
When installed in a variable depth enclosure, the FCL34070 requires a compatible operating mechanism, such as the Square D 9422ARN11 or 9422ARN21 disconnect handle and operator, which are specifically designed for FAL, FCL, and FHL breakers.
Can the trip settings on the FCL34070 be adjusted?
No, the FCL34070 features a fixed thermal-magnetic trip unit. Both the long-time and instantaneous trip functions are factory set and cannot be adjusted in the field.
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