Description
Product Overview
The VFD-004S21A delivers stable motor control with features such as overload protection, short-circuit protection, and adjustable acceleration/deceleration. Its user-friendly interface and robust design make it suitable for a variety of industrial machinery, including pumps, fans, conveyors, and compressors.
Key Features
Official Product Name: VFD-004S21A
Compact and durable VFD for AC motor control
Adjustable speed and torque control
Built-in protections: overcurrent, overvoltage, short-circuit
Energy-efficient operation
Easy installation and maintenance
Warranty & After-Sales
12-month warranty from delivery date
Technical support for installation and troubleshooting
Rapid replacement service for defective units
Delivery Time
Standard delivery: 3–5 working days after order confirmation
Expedited shipping available upon request
Why Choose KaiRock
Direct sourcing from trusted manufacturers ensuring authenticity
Competitive pricing for high-quality industrial components
Global delivery for traders, integrators, and maintenance companies
Professional technical support before, during, and after purchase
Applications
Pumps, fans, and compressors
Conveyor systems
Industrial automation machinery
Process control equipment





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