Schneider VX4DCPD18N4 DC Bus Board – ATV630 400V 18.5kW

What Is the VX4DCPD18N4?

The Schneider Electric VX4DCPD18N4 is a DC BUS board used in the SCR-IGBT power section of selected Altivar Process variable frequency drives.

It is designed for 400V, 18.5kW drive applications and is an internal component of the inverter’s power electronics assembly.

This board is intended for industrial VFD maintenance, repair and replacement applications.

It is offered as tested stock for customers requiring a replacement DC BUS board.

Before ordering, verify the original board part number and complete drive model to ensure correct replacement compatibility.

Key Specifications

Specification	Details
Part Number	VX4DCPD18N4
Brand	Schneider Electric
Product Type	DC BUS Board (SCR-IGBT)
Drive Series	Altivar Process ATV630
Compatible Drive Reference	ATV630D18N4 / ATV630D18N4Z
Voltage Rating	400V
Power Rating	18.5kW
Condition	Tested Stock
Testing Status	Tested; confirm available test details before ordering
Application	Industrial VFD Power Electronics Maintenance

Applications and Compatibility

The Schneider VX4DCPD18N4 is specified for selected Altivar Process ATV630 400V drive configurations.

The documented application includes:

• ATV630D18N4 – 18.5kW.
• ATV630D18N4Z – 18.5kW.

Important Compatibility Checks:

Before ordering, verify:

• Confirm that the original board carries the exact part number VX4DCPD18N4.
• Check the complete ATV630 drive model.
• Verify the 400V voltage class and 18.5kW rating.
• Compare the board revision and identification markings.
• Check connector positions and pin configuration.
• Compare the original DC BUS board layout and mounting points.

Do not assume that this board fits every ATV610, ATV630 or ATV930 drive.

Important Part Number Difference:

The 22kW DC BUS board is identified as VX4DCPD22N4, not VX4DCPD18N4.

These are different part numbers with different power ratings. Do not treat them as interchangeable without an approved replacement reference.

How to Identify the Correct Replacement DC BUS Board

When replacing a DC BUS board, carefully compare the original component with the replacement unit.

Check the following details:

• Part number printed on the original PCB.
• Board revision and identification markings.
• SCR-IGBT power section configuration.
• Connector positions and pin configuration.
• Electronic component layout.
• Mounting positions and electrical connections.
• Complete drive model and nameplate information.

If you are unsure about compatibility, send us clear photos of the existing board and the drive nameplate before ordering.

When Should the DC BUS Board Be Replaced?

A DC BUS board may require inspection when the inverter experiences abnormal power-stage operation or related rectifier and SCR-IGBT circuit faults.

Before replacing the board:

• Inspect the board for visible damage or burnt components.
• Check connectors and electrical connections.
• Inspect the associated SCR and IGBT power components.
• Review the drive fault history and diagnostic results.
• Verify that the replacement part number matches the original board.

A drive fault does not automatically mean the DC BUS board is defective. Other power electronics and electrical connections should also be inspected by qualified personnel.

Condition and Testing

This product is offered as tested stock for industrial inverter maintenance and replacement.

Please contact us for available inspection and testing details, actual product photos and current stock availability.

Confirm the physical condition and testing scope before purchase.

Frequently Asked Questions

What is the VX4DCPD18N4 used for?

The VX4DCPD18N4 is a Schneider Electric DC BUS board used in the SCR-IGBT power section of selected Altivar Process ATV630 drives.

Is VX4DCPD18N4 suitable for 18.5kW drives?

It is specified for 400V, 18.5kW applications, including selected ATV630D18N4 configurations. Verify the complete drive reference before ordering.

Is VX4DCPD18N4 compatible with 22kW drives?

The 22kW version is identified by a different part number, VX4DCPD22N4. Do not assume direct interchangeability.

Is this a power driver board?

Its more specific product designation is DC BUS Board (SCR-IGBT). It should not be confused with an ordinary IGBT gate driver board or main control board.

Is this board tested?

This listing is for tested stock. Please request available inspection and functional testing details before purchase.

Need Help Confirming Compatibility?

Looking for a replacement Schneider VX4DCPD18N4 DC BUS board?

Send us:

• A clear photo of the existing DC BUS board.
• A close-up photo of the VX4DCPD18N4 identification label.
• The complete ATV630 drive nameplate.
• The drive model and power rating.
• Your required quantity.

Contact us for product identification, compatibility assistance and quotation.