Square D FAL34040-1021 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Unit Mount
Quantity
Square D FAL34040-1021 - 40A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial applications, the Square D FAL34040-1021 is a 3-pole, 40A molded case circuit breaker. It provides reliable thermal-magnetic protection for demanding electrical systems. This unit-mount breaker installs into compatible Square D enclosures, switchboards, and panelboards. As a legacy F-Frame device, it is frequently replaced by the BDL36040. It features a 120-240VAC shunt trip, Visi-Trip indicator, and an 18 kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Series | FAL |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, Switchboards, Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu) / 12 AWG (Al) |
| 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), Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489, HACR Rated |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersWhat does the -1021 suffix mean on the FAL34040-1021 circuit breaker?
The -1021 suffix indicates that this breaker includes a factory-installed 120-240VAC shunt trip accessory. This allows the circuit to be opened remotely via a control signal.
What is the modern replacement for the legacy FAL34040-1021 breaker?
As a legacy F-Frame device, it is frequently replaced by the PowerPact B-Frame series, specifically the BDL36040. Note that a separate shunt trip accessory must be added to the B-Frame replacement to match the remote tripping capability of the original unit.
How does the shunt trip function operate in the FAL34040-1021?
The factory-installed 120-240VAC shunt trip allows the breaker to be tripped remotely by an external signal, such as a fire alarm system or emergency stop button, quickly disconnecting power during a critical event.
How is the FAL34040-1021 installed?
This is a unit-mount circuit breaker, meaning it is typically surface-mounted or installed using individual mounting brackets rather than plugging or bolting directly onto a panelboard bus.
What are the lug wire size requirements for installing the FAL34040-1021?
The factory-installed line and load lugs accept 14 to 1/0 AWG copper wire or 12 to 1/0 AWG aluminum wire.
Can the FAL34040-1021 be used in DC applications?
Yes, this breaker is rated for use in DC systems up to 250VDC, providing a 10kA interrupting capacity at that voltage.
What type of trip unit does the FAL34040-1021 use?
It features a thermal-magnetic trip unit with fixed long-time and fixed instantaneous trip functions to protect against overloads and short circuits.
What types of equipment is the FAL34040-1021 compatible with?
This F-Frame unit-mount breaker is designed for installation in compatible Square D enclosures, switchboards, and panelboards.
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