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Square D LDP36400U31X Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
LDP36400U31X
Molded Case Circuit Breaker
Brand
Square D
SKU
LDP36400U31X
Quantity
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Square D LDP36400U31X - 400A 3 Pole Molded Case Circuit Breaker
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Square D LDP36400U31X - 400A 3 Pole Molded Case Circuit Breaker
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| Brand | Square D |
|---|---|
| Series | LDP |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LDP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QED Switchboards, Square D Model 6 Motor Control Centers, Square D Enclosures, Square D I-Line Panelboards |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Handle Lock |
|---|---|
| Accessories | MicroLogic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, 80% Rated, Visual Trip Indicator, True RMS Sensing, RoHS Compliant, Mercury Free |
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Square D LDP36400U31X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | LDP |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LDP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QED Switchboards, Square D Model 6 Motor Control Centers, Square D Enclosures, Square D I-Line Panelboards |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Handle Lock |
|---|---|
| Accessories | MicroLogic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, 80% Rated, Visual Trip Indicator, True RMS Sensing, RoHS Compliant, Mercury Free |
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Description
Built for demanding environments, the LDP36400U31X is a 400A, 3-pole MCCB from the Square D PowerPacT L-Frame series. It provides robust power distribution for data centers and healthcare applications. Designed for unit-mount configurations, it integrates into Square D QED switchboards, motor control centers, and enclosures. It includes lug terminals for (2) 2/0 AWG to 500 kcmil wire. A MicroLogic 3.3 electronic trip unit offers adjustable Long-Time and Instantaneous (LI) settings.Specifications
| Brand | Square D |
|---|---|
| Series | LDP |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LDP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QED Switchboards, Square D Model 6 Motor Control Centers, Square D Enclosures, Square D I-Line Panelboards |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Handle Lock |
|---|---|
| Accessories | MicroLogic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, 80% Rated, Visual Trip Indicator, True RMS Sensing, RoHS Compliant, Mercury Free |
Product FAQs
7 answersWhat equipment is the LDP36400U31X compatible with?
This unit-mount breaker is designed for use in Square D QED switchboards, Model 6 motor control centers, and compatible enclosures. It can also be installed in I-Line panelboards when using the appropriate unit-mount hardware.
What size wire do the factory lugs on the LDP36400U31X accept?
The standard line and load lugs accommodate two 2/0 AWG to 500 kcmil aluminum or copper conductors per phase. Ensure proper torque specifications are followed during installation.
What protection features does the MicroLogic 3.3 trip unit offer?
The MicroLogic 3.3 electronic trip unit provides adjustable long-time and instantaneous (LI) settings. This allows panel builders and electricians to fine-tune the overcurrent and short-circuit response to match specific load requirements.
Can the LDP36400U31X be used in DC electrical systems?
Yes, in addition to its AC ratings, this PowerPacT L-frame breaker is rated for 250VDC applications with a 20kA interrupting capacity.
Is the LDP36400U31X a plug-on I-Line breaker?
No, this is a unit-mount, bolt-on circuit breaker. While it can be used in I-Line panelboards with the correct mounting pan, it does not feature the plug-on jaw connections found on dedicated I-Line breakers.
What does the U31X suffix mean in the LDP36400U31X part number?
The U31X suffix specifies that the breaker is equipped with a MicroLogic 3.3 electronic trip unit. This designates the inclusion of adjustable long-time and instantaneous (LI) protection without ground fault capabilities.
Does the LDP36400U31X provide ground fault protection?
No, this specific model features an LI (long-time and instantaneous) trip unit. If your application requires equipment ground fault protection, you will need a breaker with an LSIG trip unit, such as a MicroLogic 6.3.
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