Square D PLA34120U44A Molded Case Circuit Breaker
- 1200A
- 3 Pole
- I-Line
Quantity
Square D PLA34120U44A - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering advanced microprocessor-based protection, the Square D PLA34120U44A is a 3-pole, 1200A molded case circuit breaker. This PowerPacT P-Frame unit is engineered for facilities requiring highly configurable trip settings. The breaker features an I-Line plug-on connection, allowing it to mount into Square D I-Line panelboards and switchboards. At its core is the Micrologic 6.0A trip unit, featuring a built-in ammeter and fully adjustable LSIG functions with 100kAIC at 480V.Specifications
| Brand | Square D |
|---|---|
| Series | PLA |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC |
| Amperage Range | 480-1200A |
|---|
| Frame Type | P |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (4) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 6.0A |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Communication Module, Rating Plugs |
|---|---|
| Accessories | Micrologic 6.0A 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 | HACR Rated, Current Limiting, True RMS Sensing, 80% Rated |
Product FAQs
7 answersWhat type of panelboards accept the PLA34120U44A circuit breaker?
This PowerPacT P-frame breaker is designed exclusively for Square D I-Line power distribution panelboards and I-Line switchboards.
What does the U44A suffix mean in the PLA34120U44A catalog number?
The U44A suffix indicates the breaker is equipped with a Micrologic 6.0A electronic trip unit. This provides Long-Time, Short-Time, Instantaneous, and Ground-Fault (LSIG) protection functions, plus an integrated ammeter.
How is the PLA34120U44A installed into an electrical system?
It utilizes an I-Line plug-in connection on the line side to mount directly onto the panelboard bus stack. The load side features mechanical lugs that accept four 3/0 AWG to 500 kcmil aluminum or copper conductors.
Can this LSIG circuit breaker be used in an outdoor NEMA 3R I-Line panelboard?
No. Ground-fault capable LSIG breakers require a box extension for the neutral CT assembly. NEMA 3R enclosures cannot be extended, so this breaker must be used in NEMA 1 indoor applications or a separate enclosure.
Are the trip settings on the PLA34120U44A adjustable?
Yes. The Micrologic 6.0A trip unit allows you to adjust the pickup and delay settings for the long-time, short-time, instantaneous, and ground-fault functions to ensure proper system coordination.
Can the trip unit on this P-frame breaker be replaced or upgraded?
Yes. PowerPacT P-frame circuit breakers feature interchangeable Micrologic trip units, allowing you to swap or upgrade the trip unit in the field without replacing the entire breaker frame.
How does the ground-fault function on this breaker operate?
The ground-fault protection monitors the circuit for low-level arcing faults to ground. If a fault exceeds the adjustable pickup setting for the specified delay time, the breaker will trip to prevent equipment damage.
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