Square D LLL36400CU33X Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Square D LLL36400CU33X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for demanding industrial applications, the Square D LLL36400CU33X is a 3-pole, 400A molded case circuit breaker from the PowerPact L-Frame family. It provides robust LSI protection via an advanced MicroLogic 3.3S electronic trip unit. This unit-mount breaker installs into Square D switchboards, motor control centers, and enclosures. It features standard lug terminals for secure connections. Rated for 100kAIC at 480V, this 100% rated MCCB allows continuous operation at full capacity.Specifications
| Brand | Square D |
|---|---|
| Part Number | LLL36400CU33X |
| Series | LLL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LLL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels, Enclosures |
| 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, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Visual Trip Indicator, 100% Rated, Mercury Free, RoHS Compliant, PVC Free |
Product FAQs
5 answersIs the Square D LLL36400CU33X rated for 100 percent continuous duty?
Yes, the C in the catalog number indicates this breaker is 100 percent rated. This allows it to carry its full 400A continuous current rating without the standard 80 percent derating factor.
What specific trip unit is included with the LLL36400CU33X?
This breaker features a MicroLogic 3.3S electronic trip unit. It provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) protection settings for precise coordination.
How many conductors can the lugs on the LLL36400CU33X accept?
The factory-installed line and load lugs are designed to accept two 2/0 AWG to 500 kcmil aluminum or copper conductors per phase.
How does a unit-mount breaker like the LLL36400CU33X install into an electrical system?
As a unit-mount, feed-thru circuit breaker, it bolts directly to the mounting surface or backpan of a panel rather than plugging into a specialized I-Line busway.
What safety certifications does the LLL36400CU33X hold?
This PowerPacT L-frame breaker is UL listed, CSA certified, and IEC approved for use in industrial and commercial electrical systems.
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