Product Description:

The 12.F4.C1D.4M00 frequency inverter is produced by KEB for the F4 Combivert Frequency Inverters series. It is a compact AC drive that converts constant mains power into a variable voltage-frequency output for machine-mounted induction or permanent-magnet motors. Within an automation cell, the unit supplies regulated speed, integrates a brake transistor for controlled deceleration, and supports panel installations where footprint and wiring simplicity are critical.

The power stage is sized for motors up to 4 kW, delivering a continuous apparent output of 6.6 kVA. Under rated conditions, the inverter supplies 9.5 A to the motor while drawing a nominal line current of 10.5 A. This current balance reflects internal PWM conversion losses and the drive’s switching behavior. Thermal design limits the aluminum heat sink to 85 °C, so field mounting must allow adequate airflow to keep the semiconductor junctions below this limit. These values describe the continuous operating range for steady-state production runs in conveyors, pumps, or process drives that require stable torque control across a broad speed range.

For transient demands, the inverter can modulate carrier pulses at a rated switching frequency of 12 kHz, which improves output waveform quality while increasing dynamic losses. During rapid acceleration, it tolerates a short-time current of 17.1 A, after which current limiting protects the output IGBTs. Internal dissipation is quantified at 130 W, and this heat must be removed to avoid derating. When the brake transistor engages, the external resistor may not fall below 82 Ω, which prevents excess energy from overloading the chopper circuit. Additional protection includes a 10 A braking current, a 20 A mains fuse, a stall current of 6.4 A at 8 kHz, and an overcurrent trip set at 20.9 A.