Square D FAL340451021 Molded Case Circuit Breaker
- 45A
- 3 Pole
- Unit Mount
Quantity
Square D FAL340451021 - 45A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial power distribution, the Square D FAL340451021 is a 3-pole, 45A molded case circuit breaker. It provides reliable thermal-magnetic protection with a 25kAIC rating at 240V and 18kAIC at 480V. This unit-mount breaker installs into compatible Square D enclosures, switchboards, and panelboards. As a legacy F-Frame device, it is commonly replaced by the newer HDL36045 model when upgrading systems.Specifications
| Brand | Square D |
|---|---|
| Series | FAL |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | FAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Enclosures, Switchboards, Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/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, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, HACR Rated, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, HID Rated |
Product FAQs
7 answersWhat does the 1021 suffix indicate on the FAL340451021 catalog number?
The 1021 suffix specifies that this circuit breaker includes a factory-installed 120 to 240VAC shunt trip accessory. This allows facility managers or automated systems to remotely open the breaker for enhanced control and safety.
What equipment is the FAL340451021 designed to be installed in?
This F-frame breaker is engineered for compatibility with legacy Square D enclosures, switchboards, and panelboards that are configured to accept unit mount circuit breakers.
What does a unit mount configuration mean for the FAL340451021?
As a unit mount, feed-thru breaker, it is designed to be individually mounted using fasteners rather than plugging directly onto a panelboard busbar. It requires dedicated wiring to both the line and load terminals.
Are the terminals on the FAL340451021 rated for aluminum wiring?
Yes, the factory-installed lugs are dual-rated for both copper and aluminum conductors, accepting wire sizes from 14 AWG up to 1/0 AWG.
Can the FAL340451021 be used in DC applications?
Yes, in addition to its AC ratings of 25kA at 240VAC and 18kA at 480VAC, this breaker is rated for use on direct current systems with an interrupting capacity of 10kA at 250VDC.
Are the trip settings adjustable on the FAL340451021?
No, this breaker features a thermal-magnetic trip unit with fixed thermal and fixed magnetic settings. It provides standard long-time and instantaneous (LI) protection without adjustable dials.
Is the FAL340451021 part of a current or legacy product line?
The FAL frame is a legacy molded case circuit breaker series from Square D. While Schneider Electric has phased out new production, these breakers are still sourced to maintain and service existing legacy switchboards and enclosures.
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