Schneider ElectricLJA36400U44X
Square D LJM36400U31X Circuit Breaker
- 400
- 3 Pole
- Unit
Square D
LJM36400U31X
Circuit Breaker
Brand
Square D
SKU
LJM36400U31X
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D LJM36400U31X 3 Pole Circuit Breaker
Re-Certified
Quantity
Quantity
Square D LJM36400U31X 3 Pole Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LJM36400U31X |
| Series | PowerPact L |
| Amperage | 400 A |
| Poles | 3 |
| Mounting Style | Unit |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Control Panels |
| Wire Gauge | 2x AWG 2/0 to 500KCmil, Al/Cu |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Lug Kits, Terminal Shields, Padlock Attachment |
|---|---|
| Standards | RoHS, REACh, HACR |
| Approval | CCC, CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, 80% Rated, Mercury Free, RoHS Compliant, Visual Trip Indicator |
Quantity
Square D LJM36400U31X 3 Pole Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | PowerPact L |
| Amperage | 400 A |
| Poles | 3 |
| Mounting Style | Unit |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Control Panels |
| Wire Gauge | 2x AWG 2/0 to 500KCmil, Al/Cu |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Lug Kits, Terminal Shields, Padlock Attachment |
|---|---|
| Standards | RoHS, REACh, HACR |
| Approval | CCC, CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, 80% Rated, Mercury Free, RoHS Compliant, Visual Trip Indicator |
Similar Items
400A 3 Pole Molded Case Circuit Breaker
Schneider ElectricLJA36400U43X
400A 3 Pole Molded Case Circuit Breaker
400A 3 Pole Molded Case Circuit Breaker
Description
Square D LJM36400U31X 3 Pole Circuit Breaker
The Square D LJM36400U31X is a 3 Pole solid state molded case circuit breaker with a current rating of 400 Amps and a voltage rating of 600VAC. It has an interrupting rating of 65kAIC at 480VAC. The LJM36400U31X has a bolt-on connection type and includes long time and instantaneous trip functions.
Specifications
| Brand | Square D |
|---|---|
| Series | PowerPact L |
| Amperage | 400 A |
| Poles | 3 |
| Mounting Style | Unit |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Control Panels |
| Wire Gauge | 2x AWG 2/0 to 500KCmil, Al/Cu |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Lug Kits, Terminal Shields, Padlock Attachment |
|---|---|
| Standards | RoHS, REACh, HACR |
| Approval | CCC, CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, 80% Rated, Mercury Free, RoHS Compliant, Visual Trip Indicator |
Product FAQs
7 answersWhat type of enclosures or panels is the LJM36400U31X compatible with?
This unit-mount PowerPact L-frame breaker is designed for use in Square D switchboards, motor control centers, and industrial control panels. It features a bolt-on connection.
What does the U31X signify in the LJM36400U31X catalog number?
The U31X suffix indicates the breaker is equipped with a MicroLogic 3.3 electronic trip unit. This provides adjustable Long-Time and Instantaneous (LI) trip functions for precise overcurrent and short-circuit protection.
What is the recommended tightening torque for the standard mechanical lugs?
The standard mechanical lugs for this 400A L-frame breaker require a tightening torque of 442 lb-in (50 N.m).
Can the LJM36400U31X be reverse fed?
Yes. Standard unit-mount PowerPact L-frame breakers with electronic trip units have factory-sealed trip units and are suitable for reverse feeding.
What is the I-Line plug-on equivalent for this unit-mount breaker?
The I-Line equivalent is the LJA36400U31X, which shares the same 400A rating, 65kA at 480V interrupting capacity, and MicroLogic 3.3 trip unit, but features a plug-on line connection for Square D I-Line panelboards.
Does the LJM36400U31X provide ground fault protection?
No. The MicroLogic 3.3 trip unit only provides Long-Time and Instantaneous (LI) protection. For equipment ground fault protection, a breaker with a MicroLogic 6.3 (LSIG) trip unit is required.
Is the LJM36400U31X rated for 100% continuous current?
No, this standard L-frame breaker is rated for 80% continuous current.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.