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Square D LJA36400U33X Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Square D
LJA36400U33X
Molded Case Circuit Breaker
Brand
Square D
SKU
LJA36400U33X
Quantity
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Square D LJA36400U33X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LJA36400U33X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | LJA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 160-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (2) 2/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Communication Module |
|---|---|
| Accessories | Micrologic 3.3S Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
Quantity
Square D LJA36400U33X - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | LJA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 160-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (2) 2/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Communication Module |
|---|---|
| Accessories | Micrologic 3.3S Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
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Description
Built for robust power distribution, the Square D LJA36400U33X is a 3-pole, 400A electronic trip molded case circuit breaker. It is part of the PowerPacT L-Frame series, designed for heavy-duty commercial and industrial facilities. This unit installs into Square D I-Line panelboards and switchboards using a secure plug-on connection. It is equipped with a Micrologic 3.3S trip unit, offering adjustable long-time, short-time, and instantaneous (LSI) functions for precise system coordination.Specifications
| Brand | Square D |
|---|---|
| Series | LJA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 160-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (2) 2/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Communication Module |
|---|---|
| Accessories | Micrologic 3.3S Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
Product FAQs
4 answersWhat panelboards are compatible with the LJA36400U33X breaker?
This breaker installs directly into Square D I-Line panelboards and switchboards. It uses a plug-in jaw connection on the line side to attach to the bus assembly, and mechanical lugs on the load side.
What does the U33X suffix mean on this Square D breaker?
The U33X designates a Micrologic 3.3 S electronic trip unit. This specific trip unit provides adjustable Long-time, Short-time, and Instantaneous (LSI) protection functions.
How are conductors terminated on the LJA36400U33X?
The load side features mechanical lugs that accept two 2/0 AWG to 500 kcmil aluminum or copper conductors per phase. The line side relies entirely on the I-Line bus plug-in connection.
Can the LSI trip settings be adjusted on this breaker?
Yes, the integrated Micrologic 3.3 S trip unit features dial settings on the face of the breaker. These dials allow electricians to configure the pickup and delay for long-time and short-time functions, as well as the pickup for instantaneous faults.
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