Schneider PJA36040U44BE1YP MCCB Circuit Breaker Unit

Module Feature

PJA36040U44BE1YP belongs to Schneider Electric PowerPacT P frame electronic molded case circuit breaker.

It is 3-pole, rated current 400A, rated voltage 600VAC, equipped with Micrologic electronic trip unit, supports long time, short time and instantaneous protection curve adjustment. Built-in Modbus communication function for electrical parameter uploading and remote monitoring. It supports I-Line bus mounting or lug connection, compatible with auxiliary switch, alarm switch, shunt trip and undervoltage release accessories. Widely stocked as feeder and main protection spare for factory, data center and petrochemical low voltage cabinet.

Working principle

Internal current transformers sample three-phase current signals and transmit to Micrologic trip unit.

When overload, short time delay or short circuit fault is detected, the trip unit triggers release mechanism to separate main contacts and cut fault circuit. Communication module transmits real-time current, power, energy and fault event data to upper SCADA monitoring system. Mechanical latch prevents automatic reclosing after fault trip.

Onboard components

Main contact assembly, arc extinguishing chamber, CT current sensor group, Micrologic electronic trip controller, Modbus communication board, operating mechanism, trip release coil, auxiliary and alarm contact set, thermoset insulated molded housing.

LED indicators

Front LEDs indicate power supply, communication running, overload pre-alarm and fault trip status. Local display screen shows measured electrical values and fault codes.

Hardware self‑diagnosis

Built-in supervision detects trip unit power loss, communication interruption, CT abnormality and internal circuit error. Fault records can be viewed on local display or EcoStruxure Power software.

Programming software

EcoStruxure Power Commission, used for protection curve setup, Modbus address configuration and fault log review.

Electrical & Process Parameters

Model:PJA36040U44BE1YP Brand:Schneider Electric Device type:3P electronic molded case circuit breaker Function:Overload, short-circuit protection and electrical parameter monitoring for low voltage AC distribution loop

Mechanical & Structure

Mounting:I-Line bus or fixed lug mounting inside LV cabinet Protection class:IP20 Housing:Thermoset insulated molded case

Environmental

Operating temperature:-25℃ ~ +70℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:UL489, CE, IEC

Status:Original Schneider power distribution spare

Installation

Follow specified wiring torque and phase sequence requirement.

Set protection coordination parameters according to upstream and downstream equipment, test trip and communication function before energizing.

Interface

3-phase main power terminal, auxiliary/alarm dry contact terminal, Modbus communication port, shunt / undervoltage release wiring terminals.

Diagnostic

Overload pre-alarm: Load current exceeds long time setting value, check downstream load condition. Instantaneous trip: Short circuit fault, inspect cable and load equipment. Communication offline: Modbus wiring error, address conflict or trip unit failure.

Product Brief

Schneider PJA36040U44BE1YP molded case circuit breaker, PowerPacT P 3P 400A MCCB spare for industrial low voltage distribution cabinet replacement