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Square D PGA36040U43A Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Square D
PGA36040U43A
Molded Case Circuit Breaker
Brand
Square D
SKU
PGA36040U43A
Quantity
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Square D PGA36040U43A - 400A 3 Pole Molded Case Circuit Breaker
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Description
Built for complex coordination, the Square D PGA36040U43A is a 400A, 3-pole electronic trip MCCB. It protects industrial environments requiring precise fault management. This P-Frame breaker connects to Square D I-Line panelboards and switchboards. It serves as a reliable substitute for PJA36040U43A and PLA36040U43A models. It features a Micrologic 5.0A trip unit with an integrated ammeter, delivering adjustable long-time, short-time, and instantaneous (LSI) protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | PGA36040U43A |
| 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, Square D I-Line 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 | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 5.0A |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Communication Module |
|---|---|
| Accessories | Micrologic 5.0A 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 | 80% Rated, HACR Rated, True RMS Sensing, Ammeter |
Product FAQs
6 answersWhat panelboards accept the PGA36040U43A circuit breaker?
This breaker features an I-Line style plug-in connection and is exclusively compatible with Square D I-Line panelboards and switchboards. It requires 9 inches of mounting space on the bus assembly.
What specific trip unit is included with the PGA36040U43A?
The U43A suffix indicates it is equipped with a Micrologic 5.0 A (Ammeter) electronic trip unit. This provides adjustable Long-time, Short-time, and Instantaneous (LSI) protection, plus an integrated digital ammeter for phase current monitoring.
What are the lug wire size requirements for this 400A breaker?
The standard mechanical lugs on this breaker accept three 3/0 AWG to 500 kcmil aluminum or copper (Al/Cu) conductors per phase.
What is the difference between the PGA36040U43A and the PJA36040U43A?
Both are 400A, 3-pole I-Line breakers with Micrologic 5.0 A trip units, but they have different interrupting capacities. The PGA model is rated for 35kA at 480VAC, whereas the PJA model offers a higher interrupting rating of 65kA at 480VAC.
How do you adjust the trip settings on the Micrologic 5.0 A trip unit?
The trip unit features rotary dials on the front of the breaker. These allow licensed electricians to fine-tune the Long-time pickup and delay, Short-time pickup and delay, and Instantaneous pickup to coordinate with the specific demands of the electrical system.
Does the PGA36040U43A provide equipment ground fault protection?
No, this specific model features an LSI trip unit (Long-time, Short-time, Instantaneous). It does not include the G (Ground-fault) function. If ground fault protection is required for your application, you will need a breaker with an LSIG trip unit, such as one equipped with a Micrologic 6.0 A.
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