12.F4.F1E-4R05 KEB
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The KEB 12.F4.F1E-4R05 is a frequency inverter from the F4 Combivert Frequency Inverters series. It has a max rated motor power of 4 kW and a nominal input current of 10.5 Amps. The inverter operates with three input and three output phases and features an IP20 protection system.
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Product Description:
The 12.F4.F1E-4R05 belongs to the F4 Combivert Frequency Inverters series from KEB. It is a three-phase AC drive designed to modulate motor speed in automated machinery by adjusting the applied frequency and voltage. Integrating the inverter into a control cabinet allows precise acceleration, deceleration, and braking profiles without mechanical contactors, supporting energy-efficient operation on production lines, conveyors, and pumping stations. This control method also helps reduce mechanical shock during starts, stops, and speed changes.
An internal braking transistor is included, so excess kinetic energy can be dissipated through an external resistor without extra modules. The inverter accepts a three-phase supply and draws a nominal input of 10.5 A, and wiring uses conductors up to 2.5 mm². To protect upstream circuits, the overcurrent trip activates at 20.9 A, while dynamic events are handled by a maximum short-time current of 17.1 A. Deceleration torque is limited by a maximum braking current of 15 A, and the connected resistor must be at least 50 Ω. The integrated power section supports motors up to 4 kW, and continuous conversion losses are 180 W. This arrangement gives the drive a practical way to manage regenerated energy during stopping cycles while maintaining stable operation in routine machine duty.
On the output side, the drive delivers 6.6 kVA of apparent power through a symmetrical three-phase bridge, providing a nominal current of 9.5 A to the motor terminals. A service-rated mains fuse of 20 A is recommended to isolate the unit during faults. The protective system is classified as IP20, indicating finger-safe access but requiring installation in a closed cabinet for dust or moisture exposure. The inverter can run induction machines steadily, and its short-time current margin supports startup surges without interrupting normal motor control. Because the housing relies on cabinet protection, the unit should be placed where panel airflow is not blocked by surrounding components.
