A high-capacity solution for demanding electrical systems, the Square D PJP36100U31A provides 1000A of reliable circuit protection. This 3-pole unit mount MCCB is fully compatible with Square D QED switchboards and Model 6 motor control centers. It utilizes advanced microprocessor-based technology through its interchangeable Micrologic 3.0 trip unit, offering configurable long-time and instantaneous (LI) protection. The 80% rated breaker handles up to 65kA fault currents at 480VAC.
Square D QED Switchboards, Model 6 Motor Control Centers
Wire Gauge
(4) 3/0 AWG-500 kcmil (Al/Cu)
Max Wire
500 kcmil
Min Wire
3/0 AWG
Protection and operation
Trip Technology
Electronic Trip
Trip Function Code
LI
Trip Function
Long-Time, Instantaneous
Trip Adjustability
Adjustable
Standards and features
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, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489
Approval
CE, CSA, IEC, NOM, UL
Temp Rating
-25C to 70C
Construction Features
HACR Rated, True RMS Sensing, Interchangeable Trip Unit, 80% Rated
Product FAQs
6 answers
What trip unit is installed on the PJP36100U31A?
This breaker features the MicroLogic 3.0 electronic trip unit. The U31A suffix indicates it provides adjustable long-time and instantaneous (LI) trip functions.
What does Unit Mount mean for this P-frame breaker?
Unit mount indicates the breaker bolts directly to the backpan or bus structure using traditional feed-thru connections. This is different from I-Line breakers, which plug directly onto a specialized panelboard bus.
Is the PJP36100U31A rated for 100 percent continuous current?
No, this is a standard 80 percent rated circuit breaker. Applications requiring a 100 percent continuous current rating need a catalog number containing a C after the amperage, such as PJP36100CU31A.
Does this breaker provide ground fault protection?
No, the included MicroLogic 3.0 trip unit only provides long-time and instantaneous (LI) protection. It does not include equipment ground fault (LSIG) capabilities.
What is the difference between PJP and PJA circuit breakers?
PJP breakers are unit mount devices designed to bolt onto a backpan or bus. PJA breakers share the same electrical ratings but feature an I-Line plug-on connection for Square D I-Line panelboards.
Can I add a shunt trip or undervoltage release to this breaker?
Yes, PowerPacT P-frame circuit breakers accept a variety of field-installable accessories, including shunt trips, undervoltage releases, and auxiliary switches, which mount internally under the front cover.
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