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Square D PJA36100U44A Molded Case Circuit Breaker
- 1000A
- 3 Pole
- I-Line
Square D
PJA36100U44A
Molded Case Circuit Breaker
Brand
Square D
SKU
PJA36100U44A
Quantity
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Square D PJA36100U44A - 1000A 3 Pole Molded Case Circuit Breaker
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Description
Designed for maximum system coordination, the Square D PJA36100U44A is a 3-pole, 1000A PowerPacT P-frame circuit breaker for demanding industrial environments. It provides reliable electronic trip protection for heavy-duty applications. This MCCB utilizes an I-Line plug-on mounting style, making it fully compatible with Square D I-Line panelboards and switchboards. The plug-on design simplifies installation and maintenance in high-capacity distribution systems. The integrated Micrologic 6.Specifications
| Brand | Square D |
|---|---|
| Series | PJA |
| Amperage | 1000A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 400-1000A |
|---|
| Frame Type | PJA |
|---|---|
| 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 |
|---|---|
| Accessories | Micrologic 6.0A Trip Unit, Lugs (Load Side) |
| 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, 80% Rated, True RMS Sensing |
Product FAQs
8 answersWhat panelboards and switchboards accept the PJA36100U44A?
The PJA36100U44A features an I-Line plug-in connection on the line side, making it exclusively compatible with Square D I-Line panelboards and I-Line switchboards. It will not fit in standard unit-mount or drawout enclosures.
What does the U44A suffix mean in the PJA36100U44A catalog number?
The U44A suffix identifies the specific electronic trip unit factory-installed in the breaker. It signifies a MicroLogic 6.0A trip unit, which features Long-Time, Short-Time, Instantaneous, and Ground-Fault (LSIG) protection, plus an integrated ammeter.
How is the PJA36100U44A wired on the load side?
The load side (OFF end) of this breaker is equipped with mechanical lugs designed to accept four 3/0 AWG to 500 kcmil conductors per phase. The lugs are rated for both aluminum (Al) and copper (Cu) wire.
How does the I-Line connection work on this P-frame breaker?
The line side (ON end) utilizes Square D I-Line plug-on jaws, which attach directly to the bus stack inside an I-Line panelboard. This eliminates the need for line-side cabling and significantly speeds up the installation process.
Does this 1000A breaker provide ground-fault protection?
Yes, the included MicroLogic 6.0A trip unit features an integral ground-fault (the G in LSIG) protection function. This allows personnel to adjust ground-fault pickup and delay settings to coordinate safely with downstream devices.
Are the trip functions on the PJA36100U44A adjustable?
Yes, the electronic MicroLogic 6.0A trip unit is fully adjustable. Electricians can fine-tune the long-time, short-time, instantaneous, and ground-fault settings to match the specific demands and coordination requirements of the electrical system.
Can the trip unit be replaced or upgraded in the field?
Yes. The Square D PowerPacT P-frame architecture uses interchangeable trip units. If facility requirements change, the MicroLogic 6.0A unit can be removed and replaced with a different MicroLogic model without having to replace the entire breaker frame.
Is the PJA36100U44A an 80 percent or 100 percent rated breaker?
The PJA36100U44A is an 80 percent rated molded case circuit breaker. Under standard electrical codes, this means continuous loads (those lasting three hours or more) should not exceed 800 Amps, which is 80 percent of its 1000A maximum continuous current rating.
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