HITACHI HFC-VWS VWS3.5HF3EH

Hitachi HFC-VWS VWS3.5HF3EH Frequency Inverter

Description

The Hitachi VWS3.5HF3EH is a transistor-based frequency inverter from the HFC-VWS series, designed for precise and reliable control of 3-phase asynchronous motors. Despite its vintage, this drive is known for its durability and straightforward operation via the integrated digital operator station. It’s an excellent choice for replacement in older machinery, ensuring continued operation without the need for extensive system retrofits. This unit is rated for an output current of 5.3A, suitable for motor applications of approximately 3.7kW (5 HP).

Specifications

• Manufacturer: Hitachi
• Series: HFC-VWS
• Model: VWS3.5HF3EH
• Input Voltage: 380-460V AC, 3-Phase, 50/60 Hz
• Output Voltage: max 380-460V AC, 3-Phase
• Output Current: 5.3 A
• Output Frequency: 1-144 Hz
• Power Rating (Approx.): 3.7 kW / 5 HP

Label Info

• Model: VWS3.5HF3EH
• MFG.NO.: SE3HF3H 04D
• Date: 1990

Application

This frequency inverter is ideal for variable speed applications such as fans, pumps, conveyors, and other general-purpose machinery in industrial environments that require reliable motor control.

Country of Origin

Made in Japan.

CO2 Impact

Opting for this refurbished unit instead of a new one prevents the emission of approximately 240 kg of CO2, contributing to a more sustainable industrial practice.

Availability

This item is a tested, used product. Order now from spareparts2day for expert support and fast delivery.

FAQ

What should I check before powering up this vintage VWS3.5HF3EH inverter?

Given its age (1990), it is crucial to perform a capacitor reformation process. This involves gradually applying DC voltage to the DC bus capacitors to prevent them from failing due to long-term storage. Also, inspect for any physical damage or loose connections.

Can I use this inverter with a modern high-efficiency motor?

While it can run a modern motor, this drive uses older V/f (volts per hertz) control logic which may not fully optimize the performance and efficiency of a newer motor. For basic speed control it will function, but for applications requiring high torque or precision, a modern vector control drive is recommended.

The digital display is dim or not working. Is the drive faulty?

Not necessarily. The LCD backlights and components on these older displays can degrade over time. The drive might still be fully functional and controllable via its terminal inputs. You can verify operation by wiring it for external start/stop and potentiometer speed control.

Last Update: March 13, 2026

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