Square D LHL364001021 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Square D LHL364001021 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering reliable thermal-magnetic protection, the LHL364001021 is a robust 3-pole molded case circuit breaker for heavy-duty commercial power distribution. Manufactured by Square D, this 400A unit handles demanding electrical systems with ease. Engineered for unit-mount configurations, it installs into compatible Square D L-Frame enclosures, switchboards, and panelboards. For modern upgrades, this legacy model is replaced by the LGL36400, which requires a separate shunt trip.Specifications
| Brand | Square D |
|---|---|
| Part Number | LHL36400-1021 |
| Series | LHL |
| Amperage | 400A |
| 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 | Lugs (AL400LA), Shunt Trip (120-240VAC) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, 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
5 answersWhat does the 1021 suffix indicate on the LHL364001021 catalog number?
The 1021 suffix designates that the circuit breaker comes equipped with a factory-installed 120/240VAC shunt trip accessory.
What wire sizes do the lugs on the LHL364001021 accept?
The standard mechanical lugs accommodate either one 1 AWG to 600 kcmil wire or two 1 AWG to 250 kcmil wires per phase. They are compatible with both aluminum and copper conductors.
What equipment is the LHL364001021 designed to be installed in?
This unit-mount breaker is designed for installation in compatible Square D legacy L-Frame enclosures, switchboards, and panelboards. It uses a different form factor than the modern PowerPact L-Frame series.
How is the trip unit configured on the LHL364001021?
It utilizes a thermal-magnetic trip unit that provides fixed thermal protection for long-time overloads and an adjustable magnetic setting for instantaneous short-circuit protection.
How does the LHL364001021 connect to the electrical system?
It is a unit-mount breaker with a feed-thru connection type, utilizing mechanical lugs on both the line and load sides rather than plugging directly into a busbar like an I-Line breaker.
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