Schneider VX5AAFEC24N4 Inverter Power Board Unit

Module Feature

VX5AAFEC24N4 is the original power board for Schneider Altivar ATV61 and ATV71 series variable frequency drives.

Rated size C24, 400V three phase, 12A current rating. It integrates IGBT power modules, DC bus capacitors, current sampling circuit and gate drive circuit. It provides three-phase variable AC output for asynchronous motor speed regulation. Built-in overcurrent, short-circuit and over-temperature protection circuits. It is a dedicated maintenance spare for power stage failure replacement, widely stocked for industrial fan, pump and conveyor VFD cabinet.

Working principle

DC bus voltage from rectifier section is sent to IGBT power module on this board.

Gate drive signal from control board controls IGBT on/off to generate PWM variable frequency AC output to motor. Current sensors collect output current signal for closed-loop regulation and protection judgment. When overcurrent, short circuit or overheat occurs, the board triggers hardware latch fault and sends alarm signal to main control board.

Onboard components

IGBT power module, DC bus electrolytic capacitor bank, gate drive transformer, current sampling hall sensor, power supply circuit, thermal temperature sensor, terminal copper bar and coated power PCB.

LED indicators

Power status and fault codes are displayed on the inverter main control panel; power board itself has few local indicators, fault feedback transmitted via backplane to control board.

Hardware self‑diagnosis

Built-in thermal and current supervision detects IGBT short, output short circuit, over-temperature, bus voltage anomaly and current sensor loss. Parameter setting and fault diagnosis are completed by Schneider SoMove software.

Programming softwareSoMove, used for drive parameter backup, fault history reading and post-replacement commissioning.

Electrical & Process Parameters

Model:VX5AAFEC24N4 Brand:Schneider Electric Device type:ATV61 / ATV71 C24 400V power board Function:PWM power output stage for three-phase asynchronous motor variable speed control

Mechanical & Structure

Mounting:Plug-in / fixed installation inside ATV61 / ATV71 inverter chassis Protection class:IP00 internal power board Housing:Coated heavy-duty power PCB assembly

Environmental

Operating temperature:-10℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE Status:Original Schneider VFD maintenance spare

Installation

Completely cut off AC input and discharge DC bus capacitors before replacement.

Match the correct C24 size, check copper bar and backplane connector, confirm cooling fan assembly, download drive parameter file, test no-load and loaded running after commissioning.

Interface

DC bus input terminal, three-phase motor output terminal, backplane signal connector for control board.

Diagnostic

Overcurrent fault: Power board IGBT breakdown, motor cable short circuit. DC bus fault: Capacitor aging, charging circuit failure. No output: Gate drive circuit damage, control signal missing.

Product Brief

VX5AAFEC24N4 power board, Schneider ATV61/ATV71 C24 400V 12A inverter power stage spare for industrial pump and fan variable speed drive cabinet replacement.