12.F4.C3D-3420 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 12.F4.C3D-3420 is a frequency inverter from the F4 Combivert Frequency Inverters series, featuring a compact D-size housing with an integrated filter and braking transistor. It supports a 3-phase mains connection, a voltage range of 305 to 500 V, and delivers up to 4 kW of rated motor power. The inverter has a nominal output current of 9.5 Amps at 400V class and an IP20 protection rating.
Internal Product Review
The 12.F4.C3D-3420 is a KEB COMBIVERT F4 frequency inverter built for 3-phase mains connection. The compact D-size housing and integrated filter with braking transistor make cabinet installation and drive integration especially clean. Strong output delivery at 9.5 A nominal current supports dependable 4 kW motor applications.
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Product Description:
The 12.F4.C3D-3420 is a frequency inverter manufactured by KEB and supplied within the F4 Combivert Frequency Inverters series. As a COMBIVERT F4 unit, it modulates the voltage and frequency delivered to an induction motor so that machine speed and torque can be matched to process demand. The product is delivered in a Compact D-size housing that fits shallow control cabinets, and its integrated filter reduces external filtering requirements while the braking transistor supports control of a compatible braking resistor. Compact control mode and a standard fieldbus option simplify parameter access from higher-level PLCs, making the drive suitable for conveyors, pumps, and general-purpose motion tasks in automated plants.
The power section accepts a three-phase mains supply and operates across an input range of 305–500 V, corresponding to its 400 V class. Under rated operating conditions, the inverter delivers a nominal output current of 9.5 A, allowing continuous operation with motors rated for 4 kW of shaft power. The unit provides an apparent output of 6.6 kVA, allowing it to supply the connected motor while accommodating brief acceleration demands. The control electronics are air-cooled inside the enclosure, and the housing routes heat through internal passages to maintain acceptable component temperatures without an external fan.
A carrier frequency of 4 kHz balances acoustic noise against switching losses and aligns with KEB motor data tables. The enclosure has a protection rating of IP20, providing protection against accidental finger contact while requiring installation inside a suitable control cabinet. The inverter can operate at ambient temperatures from -10 to 45 °C without derating. Its conformal-coated circuit boards can tolerate relative humidity levels up to 95% without condensation, helping protect the electronics from moisture in indoor industrial environments. Adequate cabinet ventilation should be maintained so heat can dissipate from the naturally ventilated housing during continuous operation.
