Mitsubishi Capacitor Board KCN-940A

Mitsubishi Capacitor Board KCN-940A is commonly used in Mitsubishi elevator drive and power circuit systems.

This board is often referred to in the elevator spare parts market as a capacitor board, capacitance board, charger board, or drive power board. It is usually related to the elevator inverter or drive power section, where stable power charging and energy support are required during elevator operation.

For maintenance buyers, the most important point is not only the name of the board, but the exact model printed on the original PCB. KCN series boards may look similar, but different versions should be confirmed carefully before replacement.

Related KCN Series Models

This Mitsubishi capacitor board series may be searched under several related model numbers:

• KCN-910A
• KCN-920A
• KCN-921A
• KCN-930A
• KCN-940A
• KCN-941A
• KCN-942A
• KCN-943A

KCN-940A is often listed together with KCN-941A, KCN-942A, and KCN-943A as Mitsubishi elevator capacitance board / charger board models. Other sources also show KCN-910A, KCN-920A, KCN-921A, KCN-930A, KCN-940A, KCN-941A, KCN-942A, and KCN-943A as related capacitor board models.

These model numbers should be treated as related series references, not automatically interchangeable replacements.

Nameplate and Board Confirmation

Most inquiries for this part come with a photo of the old PCB rather than a full elevator model.

Before ordering, please confirm:

• original board model
• KCN-940A marking
• connector position
• capacitor condition
• board size
• elevator drive cabinet photo
• whether the original unit belongs to KCN-940A / 941A / 942A / 943A series

One public supplier listing describes KCN-940A as an elevator power supply board with size around 205 × 115 × 64 mm, but actual dimensions and connector layout should still be checked against the original site board before purchase.

Replacement Notes for Elevator Maintenance

Capacitor boards are usually checked when the elevator drive system shows abnormal behavior related to the power circuit.

Technicians may inspect this board when there are:

• drive power section faults
• abnormal charging behavior
• visible capacitor aging
• inverter cabinet fault indications
• unstable drive startup
• damaged PCB components
• suspected power board failure

Some supplier notes mention that this type of Mitsubishi capacitor / charger board can be damaged if directly installed into a shutdown elevator without proper checking. Because of this, technicians should inspect the cabinet condition and related drive circuit before installation.

Practical Reminder

Do not select KCN-940A only by appearance.

Before replacement, technicians usually compare:

• PCB code
• terminal layout
• capacitor arrangement
• connector quantity
• cabinet wiring
• original Mitsubishi drive system

If the old board label is unclear, a clear photo of both front and back sides of the PCB is usually the fastest way to confirm the correct model.