Square D FAL360501021 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Quantity
Square D FAL360501021 - 50A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for industrial environments, the Square D FAL360501021 is a 3-pole, 50A MCCB. The 1021 suffix indicates a factory-installed 120-240VAC shunt trip, enabling users to open the breaker remotely. This legacy F-frame device mounts into Square D enclosures and switchboards. For modern upgrades, it is replaced by the HGL36050, which requires a separate shunt trip accessory. Providing LI protection, it is rated for 18kAIC at 480VAC with a visual trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | FAL |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FAL |
|---|---|
| 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (120-240VAC), Lugs |
| Standards | HACR Rated, NEMA AB 1, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
8 answersWhat does the 1021 suffix indicate on the FAL360501021?
The 1021 suffix designates a factory-installed 120/240VAC shunt trip. This internal accessory allows the breaker to be tripped remotely via an external voltage signal, which is often required for emergency stop circuits or automated control systems.
What is the direct modern replacement for the obsolete FAL360501021?
The legacy F-frame series has been replaced by the PowerPact H-frame. The direct replacement is the HDL36050. Because the original breaker includes a factory-installed shunt trip, you will also need to order a compatible field-installable shunt trip accessory for the new H-frame breaker.
Can this unit-mount breaker be installed in an I-Line panelboard?
No. The FAL360501021 is a unit-mount, feed-thru circuit breaker designed for standard Square D enclosures, switchboards, and motor control centers. It does not have the plug-on jaw connections required for I-Line distribution panels.
Are the thermal and magnetic trip points adjustable on this breaker?
No. This thermal-magnetic breaker features fixed long-time (thermal) and fixed instantaneous (magnetic) trip functions. Neither the overload nor the short-circuit trip thresholds can be adjusted in the field.
What are the acceptable wire sizes and materials for the terminals?
The standard line and load lugs accept 14 AWG to 1/0 AWG copper conductors, or 12 AWG to 1/0 AWG aluminum conductors. Ensure proper torque specifications are followed during installation.
Is this breaker suitable for direct current (DC) applications?
Yes. In addition to its AC ratings, the FAL360501021 is rated for use on 250VDC systems, providing a 10kA interrupting capacity for DC circuits.
How does the shunt trip function impact the installation wiring?
The factory-installed shunt trip requires its own dedicated control wiring to supply the 120/240VAC signal. When this control voltage is applied to the shunt trip terminals, it mechanically opens the breaker contacts. The control circuit must be routed safely alongside the primary power connections.
How does the shunt trip improve system safety?
The shunt trip allows the breaker to be integrated into emergency stop (E-stop) circuits or fire alarm systems. When a safety relay or remote switch sends a 120/240VAC signal to the shunt trip, it immediately opens the breaker to disconnect power from the protected circuit.
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