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Square D LIL36400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
LIL36400
Molded Case Circuit Breaker
Brand
Square D
SKU
LIL36400
Quantity
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Square D LIL36400 - 400A 3 Pole Molded Case Circuit Breaker
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Square D LIL36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LIL36400 |
| Series | LIL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 2/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated |
| Special Features | Current Limiting |
Quantity
Square D LIL36400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | LIL36400-R |
| Series | LIL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 2/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated |
| Special Features | Current Limiting |
Similar Items
600A 3 Pole Molded Case Circuit Breaker
400A 3 Pole Molded Case Circuit Breaker
Description
Designed for commercial power distribution, this 400A current-limiting MCCB provides exceptional fault protection. It incorporates a thermal-magnetic trip unit with adjustable instantaneous functions. This unit-mount breaker installs into Square D switchboards, motor control centers, and enclosures using lug connections. For system upgrades, it is replaced by the LRL36400U31X. Capable of interrupting 200 kAIC at 480VAC, it significantly reduces let-through current to protect sensitive equipment.Specifications
| Brand | Square D |
|---|---|
| Part Number | LIL36400 |
| Series | LIL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 2/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated |
| Special Features | Current Limiting |
Product FAQs
6 answersWhat wire sizes and materials are compatible with the LIL36400 lugs?
The factory lugs on this breaker accept two conductors per phase. They are compatible with both aluminum and copper wiring, accommodating sizes from 2/0 AWG up to 500 kcmil.
How does the LIL36400 mount inside an enclosure or panel?
This is a unit mount, feed-thru circuit breaker. It is designed to be hardwired and bolted directly into Square D switchboards, motor control centers, or individual enclosures, rather than plugging into an I-Line bus.
How does the thermal magnetic trip unit function on the LIL36400?
This breaker features an LI (Long-Time, Instantaneous) trip profile. The thermal long-time element is fixed for overload protection, while the magnetic instantaneous element is adjustable, allowing you to coordinate the short-circuit trip threshold with downstream loads.
What does the current limiting feature of the LIL36400 do?
As a current limiting breaker, it is engineered to clear high-level short circuits extremely fast. This rapid response significantly reduces the peak let-through current and energy, providing enhanced protection for sensitive downstream equipment and wiring.
Is the LIL36400 suitable for systems with high available fault current?
Yes, it provides exceptional short-circuit protection with a 200kAIC interrupting rating at 480VAC and 100kAIC at 600VAC. This makes it highly suitable for heavy commercial and industrial power distribution systems with large available fault currents.
Is the LIL36400 still in active production by Square D?
The LIL36400 is a legacy L-Frame molded case circuit breaker. For modern system upgrades or new installations, it is typically replaced by the newer Square D PowerPact L-Frame series.
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