Square D LHL363001021 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Quantity
Square D LHL363001021 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for applications requiring remote shutdown capabilities, this 300A molded case circuit breaker includes a factory-installed 120-240VAC shunt trip. The LHL363001021 mounts into standard Square D L-Frame enclosures and panelboards using a traditional unit-mount configuration. As a legacy component, it serves as an exact match for existing installations before transitioning to the newer LGL36300 series. It delivers reliable Long-Time and Instantaneous (LI) thermal-magnetic protection.Specifications
| Brand | Square D |
|---|---|
| Series | LHL |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | LHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D L-Frame Enclosures, Switchboards, Panelboards |
| Wire Gauge | (1) 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (120-240VAC), Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Mercury Free, RoHS Compliant, Push-to-Trip |
Product FAQs
6 answersWhat does the 1021 suffix indicate on the Square D LHL363001021?
The 1021 suffix designates that this breaker includes a factory-installed 120-240VAC shunt trip, allowing for remote tripping of the circuit breaker via an external control signal.
Which enclosures and panels are compatible with the LHL363001021 breaker?
This unit-mount L-Frame breaker is designed for use in Square D L-Frame enclosures, as well as compatible Square D switchboards and panelboards. It is not compatible with I-Line plug-on panelboards.
What wire configurations are supported by the LHL363001021 lugs?
The factory lugs support either a single 1 AWG to 600 kcmil conductor or dual 1 AWG to 250 kcmil conductors per phase. Both aluminum and copper wiring are accepted.
How is the trip unit configured on the LHL363001021?
It utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element, allowing electricians to fine-tune the instantaneous short-circuit trip threshold.
Does the LHL363001021 plug onto a busbar?
No, this is a unit-mount, feed-thru circuit breaker. It bolts directly to the mounting surface or enclosure backpan and requires hardwired connections on both the line and load sides.
Is the LHL363001021 a current production model?
The LHL363001021 is part of the legacy Square D L-Frame series. It is primarily sourced as a direct replacement for existing setups to avoid the need for retrofitting newer breaker frames into older switchboards.
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