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Square D LJA36400CU33X Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Square D
LJA36400CU33X
Molded Case Circuit Breaker
Brand
Square D
SKU
LJA36400CU33X
Quantity
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Square D LJA36400CU33X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LJA36400CU33X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LJA36400CU33X |
| 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 |
|---|
| Frame Type | LJA |
|---|---|
| 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 | 100% Rated, HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
Quantity
Square D LJA36400CU33X - 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 |
|---|
| Frame Type | LJA |
|---|---|
| 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 | 100% Rated, HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
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Description
Engineered for commercial and industrial applications, the Square D LJA36400CU33X is a 3-pole, 400A PowerPacT L-Frame MCCB. It provides advanced protection with a 100% continuous current rating. This breaker installs into Square D I-Line panelboards and switchboards, featuring an I-Line connection on the line side and mechanical lugs on the load side. Rated 65 kAIC at 480VAC, it utilizes a MicroLogic 3.3S electronic trip unit with adjustable LSI settings for precise coordination.Specifications
| Brand | Square D |
|---|---|
| Part Number | LJA36400CU33X |
| 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 |
|---|
| Frame Type | LJA |
|---|---|
| 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 | 100% Rated, HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
Product FAQs
5 answersWhat does the "C" indicate in the LJA36400CU33X catalog number?
The "C" signifies that this PowerPacT breaker has a 100% continuous current rating. When installed in an appropriately sized enclosure with 90 degrees Celsius rated wire, it can safely carry its full 400A capacity without the standard 80% derating limit.
What specific trip unit comes installed on the LJA36400CU33X?
The "U33X" suffix indicates this breaker includes a factory-installed MicroLogic 3.3S electronic trip unit. This solid state unit offers field-adjustable Long-Time, Short-Time, and Instantaneous (LSI) protection settings to optimize electrical coordination.
How does this I-Line breaker connect to the panelboard?
This breaker features plug-on jaw connections on the line side that mount directly to the busbars of an I-Line panelboard or switchboard. The load side is equipped with mechanical lugs for outgoing wire terminations.
Is this circuit breaker compatible with legacy I-Line panelboards?
Yes, it uses the standardized Square D I-Line plug-on mounting system, making it backward compatible with most older and current-generation Square D I-Line panelboards and switchboards.
Can I install a shunt trip or auxiliary switch on this L-Frame breaker?
Yes, PowerPacT L-Frame breakers are designed to accept a variety of field-installable internal accessories. Shunt trips, undervoltage releases, and auxiliary contacts can be added beneath the front accessory cover.
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