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Square D LDL36600U33X Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Square D
LDL36600U33X
Molded Case Circuit Breaker
Brand
Square D
SKU
LDL36600U33X
Quantity
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Square D LDL36600U33X - 600A 3 Pole Molded Case Circuit Breaker
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Description
Part of Square D's PowerPacT L-Frame family, the LDL36600U33X is a 600A, 3-pole molded case circuit breaker. It delivers reliable overcurrent protection for industrial control panels, switchboards, and enclosures. This unit-mount breaker installs into compatible Square D systems. It features lug terminals accepting (2) 2/0 AWG to 500 kcmil wiring. Equipped with a MicroLogic 3.3S electronic trip unit, it provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | LDL36600U33X |
| Series | LDL |
| Amperage | 600A |
| 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 | 180-600A |
|---|
| Frame Type | LDL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Industrial Control Panels, Switchboards, 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 | MicroLogic 3.3S Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated, True RMS Sensing, Mercury Free, RoHS Compliant |
Product FAQs
6 answersWhat protection adjustments does the MicroLogic 3.3S trip unit provide on this 600A breaker?
The U33X catalog suffix indicates the inclusion of a MicroLogic 3.3S electronic trip unit. This provides fully adjustable Long-time, Short-time, and Instantaneous (LSI) trip functions, allowing electricians and panel builders to achieve much tighter system coordination than standard thermal-magnetic models.
Is the LDL36600U33X a 100% continuous current rated breaker?
No, this specific model is a standard 80% rated circuit breaker. Per NEC guidelines, continuous loads lasting three hours or more should not exceed 480 amps, which is 80% of its 600A nameplate capacity.
Can I install a shunt trip or auxiliary contacts inside this L-Frame breaker?
Yes, PowerPacT L-Frame breakers support a wide range of field-installable internal accessories. Components like shunt trips (such as the 120VAC S29386 or 24VDC S29390), undervoltage releases, and auxiliary switches mount securely behind the front accessory cover.
How does the unit-mount configuration of the LDL36600U33X install?
As a unit-mount (feed-thru) breaker, it fastens directly to the backpan of an enclosure, control panel, or switchboard using standard mounting hardware. It requires wired connections to the included line and load lugs, rather than plugging onto a Square D I-Line bus system.
Can I use this 3-pole L-Frame breaker on a single-phase 240VAC system?
Yes, 3-pole PowerPacT L-Frame breakers equipped with standard MicroLogic trip units (including the U33X) can be safely applied to single-phase circuits up to a maximum of 240VAC. The load must be wired through any two of the three available poles.
What size conductors do the standard factory lugs accept?
The factory-installed line and load lugs are designed to accommodate parallel runs for high amperage. Each lug accepts two separate conductors per phase, ranging from 2/0 AWG up to 500 kcmil, and they are rated for both aluminum and copper wire.
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