Square D PJP36120U31E Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Quantity
Square D PJP36120U31E 3 Pole Circuit Breaker
New
Quantity
Description
Square D PJP36120U31E 3 Pole Circuit Breaker
The Square D PJP36120U31E is a 3 Pole solid state molded case circuit breaker with a current rating of 1200 Amps and a voltage rating of 600VAC. It has an interrupting rating of 100kAIC at 240VAC, 65kAIC at 480VAC. The PJP36120U31E has a bolt-on connection type and includes long time and instantaneous trip functions.
Specifications
| Brand | Square D |
|---|---|
| Series | PJP |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | P |
|---|---|
| Terminal Type | Lugs |
| Wire Gauge | 3/0 AWG-500 MCM |
| Max Wire | 500 MCM |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Standards | RoHS, REACh, HACR |
|---|---|
| Approval | UL, CSA, CE, NEMA, NOM, IEC |
| Temp Rating | -25 to 70 °C |
Product FAQs
7 answersIs the PJP36120U31E compatible with Square D I-Line panelboards?
No. The PJP36120U31E is a unit-mount, bolt-on circuit breaker designed for switchboards, switchgear, or individual enclosures. For an I-Line plug-on panelboard, you would need a PJA or PGA prefix breaker instead.
Can the trip unit on the PJP36120U31E be swapped in the field?
Yes. Square D PowerPacT P-frame breakers feature interchangeable Micrologic trip units. This allows you to upgrade or replace the trip unit without removing the entire breaker frame from the switchboard.
What trip functions are provided by the U31E suffix on this breaker?
The U31E suffix indicates that the breaker is equipped with a Micrologic 3.0 solid state trip unit. This provides adjustable Long Time and Instantaneous (LI) trip functions for precise overload and short-circuit protection.
Is the PJP36120U31E rated for 100 percent continuous current?
No. This breaker carries a standard 80 percent continuous current rating. It is designed to carry up to 80 percent of its 1200A nameplate rating continuously, or 100 percent for non-continuous loads.
How can I manually test the mechanical operation of the PJP36120U31E?
All Square D PowerPacT circuit breakers include an integral push-to-trip button on the front cover. Pressing this button manually trips the breaker to verify the mechanical linkage is operating correctly.
Does the PJP36120U31E include ground fault protection?
No. The included Micrologic 3.0 trip unit only provides Long Time and Instantaneous (LI) protection. If your application requires equipment ground fault protection, you will need a breaker with a Micrologic 6.0 (LSIG) trip unit.
Can the PJP36120U31E replace older Square D 1200A breakers?
The PowerPacT P-frame is the current generation replacement for legacy Square D 1200A frames, but physical dimensions and bus connections may differ. Always verify your enclosure depth and busbar spacing before attempting a retrofit.
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