18.F4.C0H-3441 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 18.F4.C0H-3441 belongs to the F4 Combivert Frequency Inverters series and has a voltage class of 400 V. It is designed for three-phase input, features a maximum motor power of 22 kW, and weighs 14 kilograms. The inverter has a nominal input current of 55 A, a protection rating of IP20, and supports fieldbus option InterBus.
Internal Product Review
The 18.F4.C0H-3441 is a KEB F4 Combivert frequency inverter with 3-phase input and 400 V class operation. InterBus fieldbus support and 50 A nominal output current make the unit especially capable for coordinated industrial drive control. IP20 protection suits cabinet installation, and 22 kW maximum motor power is a strong specification for demanding applications.
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Product Description:
The 18.F4.C0H-3441 frequency inverter is produced by KEB within the F4 Combivert Frequency Inverters series. Designed for cabinet mounting, the device modulates the voltage and frequency supplied to three-phase motors so that conveyor lines, pumps, and other automated loads can run at application-specific speeds. It accepts a three-phase feed and converts it inside an IGBT bridge with dynamic pulse control. For integration with plant controllers, the unit can be equipped with an InterBus fieldbus option that allows parameter access and setpoint exchange over the network.
On the output side, the inverter supports motors up to 22 kW, matching medium-sized production actuators. A nominal input demand of 55 A on the 400 V line, together with a permissible conductor cross section of 25 mm², sets the basic requirements for the supply conductors. The converter delivers an output nominal current of 50 A, so motor protection can be matched to the drive’s continuous output capability. Its voltage class is rated for 400 V mains, and the IP20 enclosure provides finger-safe openings but no moisture sealing. An 80 A mains fuse can be installed upstream to clear faults, and overcurrent protection is triggered internally at 90 A. The rated switching frequency is 8 kHz, balancing acoustic noise and semiconductor loss.
For short acceleration intervals, the control section can raise carrier frequency to 16 kHz and tolerate a peak phase current of 75 A without derating. Continuous conversion losses are limited to 610 W, a figure used for cabinet heat calculations together with the drive’s 14 kg mass. Output apparent power reaches 35 kVA, enabling high-inertia loads to start at full torque while the inverter maintains field-oriented control. Cabinet ventilation must account for the heat released by the drive, and the higher carrier setting can reduce audible motor noise in some installations.
