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Square D LDA36600U31X Molded Case Circuit Breaker
- 600A
- 3 Pole
- I-Line
Square D
LDA36600U31X
Molded Case Circuit Breaker
Brand
Square D
SKU
LDA36600U31X
Quantity
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Square D LDA36600U31X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LDA36600U31X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LDA36600U31X |
| Series | LDA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 2 x 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 |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NEMA, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated |
Quantity
Square D LDA36600U31X - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | LDA36600U31X |
| Series | LDA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 2 x 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 |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NEMA, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated |
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Description
Part of the PowerPacT L-frame series, the Square D LDA36600U31X delivers robust 600A protection for commercial electrical systems. Designed specifically for Square D I-Line panelboards, this breaker features a plug-on line connection and load lugs accepting up to 500 kcmil wiring. The standout feature is its Micrologic 3.3 LI electronic trip unit, providing highly accurate, adjustable long-time and instantaneous protection with an 18 kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | LDA36600U31X |
| Series | LDA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 2 x 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 |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NEMA, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated |
Product FAQs
6 answersWhat does the "U31X" suffix mean in the LDA36600U31X catalog number?
The "U31X" designates that the breaker is equipped with a standard MicroLogic 3.3 electronic trip unit. This solid-state unit provides adjustable Long-Time and Instantaneous (LI) settings for precise electrical coordination.
What does the "D" signify in the LDA36600U31X part number?
In the Square D PowerPacT L-frame nomenclature, the "D" indicates the specific interrupting capacity tier. This D-rated breaker provides 25kA at 240VAC, 18kA at 480VAC, and 14kA at 600VAC.
Is the LDA36600U31X rated for 80 percent or 100 percent continuous current?
This breaker carries a standard 80 percent continuous current rating. According to standard electrical codes, the continuous load should not exceed 480 amps (80 percent of its 600A max rating) for three hours or more in standard enclosures.
How is the LDA36600U31X physically connected during installation?
The breaker features a plug-on line side connection that mounts directly to the bus system in Square D I-Line panelboards and switchboards. The load side utilizes standard mechanical lugs that accept two 2/0 AWG to 500 kcmil copper or aluminum conductors per phase.
Can this 3-pole breaker be applied to single-phase systems?
Yes, but with strict voltage limitations. Square D guidelines state that 3-pole PowerPacT L-frame breakers equipped with MicroLogic trip units can be used for single-phase applications utilizing any two poles, but only on 240VAC circuits.
Are there safety requirements for adjusting the MicroLogic trip unit?
Yes. Adjusting the Long-Time and Instantaneous dials alters the protection curve of the breaker. These settings should only be modified by a licensed professional based on an approved power system coordination study to ensure faults clear safely without causing system-wide nuisance trips.
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