Product Overview

The Yaskawa CIMR-VU4A0038FAA is a high-capacity model within the standard 380-480 VAC three-phase V1000 compact drive range. It delivers 25 HP at 38 A in Normal Duty operation and 20 HP at 31 A in Heavy Duty operation. This model is intended for larger industrial motors requiring variable-speed control, programmable acceleration and deceleration, motor protection and coordinated machine integration.

The Normal Duty rating supports variable-torque loads such as pumps and fans where continuous output capacity is important but severe overload is not normally expected. Heavy Duty operation provides a higher overload margin for conveyors, mixers, process machinery and constant-torque loads. The drive must be selected from motor current, torque profile and operating cycle rather than the nominal horsepower value alone.

Main Features

• 380-480 VAC three-phase industrial supply
• 25 HP and 38 A Normal Duty capacity
• 20 HP and 31 A Heavy Duty capacity
• Open Loop Current Vector control for induction motors
• V/f control for conventional variable-frequency operation
• PM Open Loop Vector mode for compatible PM motors
• 120% overload for 60 seconds in Normal Duty operation
• 150% overload for 60 seconds in Heavy Duty operation
• Built-in braking transistor for compatible braking resistors
• Programmable I/O and RS-422/485 serial communication

Technical Specifications

Compatible System and Applications

The CIMR-VU4A0038FAA can be integrated into PLC-controlled machines, process systems and standalone motor-control panels. Commands can be supplied through programmable digital terminals, analog speed references, local operator controls or a compatible serial communication network. The exact I/O arrangement depends on the existing parameter set and machine design.

Typical applications include process pumps, industrial fans, conveyors, mixers, packaging lines, material-handling systems and general production equipment. High-inertia machines and rapid stopping cycles require a braking assessment. The internal braking transistor does not absorb regenerative energy by itself; a correctly sized external resistor and suitable protective arrangement are required.

Maintenance and Replacement Notes

For replacement, verify the full CIMR-VU4A0038FAA code, nameplate current, specification number and installed drive revision. Some technical references use a more precise Heavy Duty current value near 31.7 A, while the current official model-rating table presents 31 A. The existing nameplate should be treated as the final reference for an exact replacement.

Before installation, inspect the motor insulation, motor cable, grounding, incoming voltage and mechanical load. Confirm line and load cable sizes, branch-circuit protection, panel ventilation and required clearances. Larger drives generate more panel heat, and inadequate airflow can reduce service life or cause thermal trips.

If a GA500 upgrade is planned, select the replacement by the 400 V class output-current and duty requirements. Review mounting dimensions, control wiring, safety inputs, network options, braking resistor and parameter conversion. Operational testing should include acceleration, full-load current, stopping performance, fault logic and communication status.

Related Models

Related models include CIMR-VU4A0031FAA, CIMR-VU4A0023FAA and CIMR-VU4A0018FAA. CIMR-VU4A0038FAA is the largest standard 480 V model in this V1000 NEMA 1 rating group, so a requirement above its output-current capacity should be reviewed using another drive family.

Inquiry and Supply Notes

Please provide the drive nameplate, motor nameplate, required duty, braking configuration, communication requirements and quantity. For replacement projects, panel photographs and the existing parameter backup are useful for technical verification.