Square D LC36400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Quantity
Square D LC36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LC36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LC36400 |
| Series | LC |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, HACR Rated |
Quantity
Square D LC36400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | LC36400-R |
| Series | LC |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, HACR Rated |
Description
A dependable solution for commercial power systems, the Square D LC36400 is a 400A legacy molded case circuit breaker. It utilizes proven thermal-magnetic trip technology to deliver long-time and instantaneous (LI) protection. Designed for Square D I-Line panelboards and switchboards, this 3-pole breaker offers a secure connection. For current replacements, the manufacturer recommends the PowerPact LJA36400U31X. It boasts an extra-high interrupting capacity of 65 kAIC at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | LC36400 |
| Series | LC |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, HACR Rated |
Product FAQs
8 answersWhat panelboards are compatible with the LC36400 circuit breaker?
This L-frame breaker is designed specifically for Square D I-Line panelboards and switchboards. It uses an I-Line style plug-in connection for secure line-side mounting directly to the busbar.
What size wire does the LC36400 accept?
The included mechanical lugs accommodate two wires per phase, accepting 4/0 AWG to 500 kcmil aluminum or copper conductors.
Are the trip settings on this 400-amp breaker adjustable?
Yes. While the thermal long-time trip is fixed at 400 amps, the magnetic instantaneous trip features an adjustable dial on the front of the breaker to coordinate short-circuit pickup levels.
Can you reverse feed this I-Line circuit breaker?
No. Circuit breakers with I-Line style plug-in connections are directional by design. The plug-in jaws must connect to the line-side bus, and the load wires must connect to the bottom lugs.
What is the modern replacement for the legacy LC36400 circuit breaker?
Square D recommends the PowerPact L-frame series, such as the LJA36400U31X, as the current replacement for the legacy LC36400. It offers updated features while maintaining I-Line panelboard compatibility.
Is the LC36400 suitable for DC applications?
Yes. It carries a 10kA interrupting rating at 250VDC, making it suitable for certain battery, transit, or industrial DC power distribution systems.
Does this breaker feature electronic trip units?
No, the LC36400 utilizes a traditional thermal-magnetic trip unit. If your application requires advanced features like ground fault protection, communications, or electronic trip functions, you must upgrade to the newer PowerPact L-frame series.
Does the LC36400 require additional hardware to mount in a panel?
No additional mounting hardware is required. For I-Line breakers, the line-side plug-in jaws and the retaining bracket required to secure it to the I-Line backpan are built directly into the breaker frame.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- DLDeanna L.Verified BuyerReviewingSquare D LC36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D LC36600 - 600A 3 Pole Molded Case Circuit Breaker
Worked great! Our customer was very pleased with the results.