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Square D PGA36040CU31A Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Square D
PGA36040CU31A
Molded Case Circuit Breaker
Brand
Square D
SKU
PGA36040CU31A
Quantity
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Square D PGA36040CU31A - 400A 3 Pole Molded Case Circuit Breaker
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Description
Part of the PowerPacT P-Frame series, the Square D PGA36040CU31A is a 3-pole, 400A electronic trip MCCB. It is engineered for demanding commercial and industrial applications. This breaker installs into Square D I-Line panelboards and switchboards. The plug-on mounting style ensures rapid deployment and secure phase connections. It features a Micrologic 3.0 trip unit with adjustable long-time and instantaneous (LI) settings. Notably, this model is 100% rated for continuous operation.Specifications
| Brand | Square D |
|---|---|
| Part Number | PGA36040CU31A |
| Series | PGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 160-400A |
|---|
| Frame Type | PGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 3.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Communication Module |
|---|---|
| Accessories | Micrologic 3.0 Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 100% Rated |
Product FAQs
7 answersWhich panelboards accept the PGA36040CU31A circuit breaker?
This breaker is specifically designed for Square D I-Line panelboards and switchboards. It features a plug-on I-Line connection for the line side bus and mechanical lugs for the load side.
What does the C in the PGA36040CU31A catalog number signify?
The C indicates that this breaker is 100 percent rated. When installed in an appropriately rated enclosure, it can carry its full 400A continuous current rating without the standard 80 percent derating requirement.
What specific trip unit is included with this PowerPacT P-Frame breaker?
It comes equipped with a Micrologic 3.0 electronic trip unit. The U31A suffix designates this specific trip unit, which provides adjustable long-time and instantaneous (LI) protection functions.
What wire sizes are compatible with the load lugs on this breaker?
The standard mechanical lugs accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase.
How is the PGA36040CU31A secured inside the panelboard?
It uses an I-Line bracket mounting system. The breaker plugs directly into the panelboard bus stack on the line side and is secured with a mounting bracket, eliminating the need for line-side wire terminations.
Is the PGA36040CU31A interchangeable with other PowerPacT P-Frame breakers?
Yes, it shares the exact physical dimensions and I-Line mounting footprint as other P-Frame breakers. It can directly replace other PGA, PJA, or PLA breakers if the 400A capacity and 35kAIC at 480V interrupting rating meet your system requirements.
Does this breaker include a push-to-trip feature for safety testing?
Yes, all PowerPacT circuit breakers feature an integral push-to-trip button on the front cover. This allows electricians to manually trip the breaker to verify the mechanical operation of the trip mechanism.
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