07.F4.S1D-3420 KEB
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The KEB 07.F4.S1D-3420 is part of the F4 Combivert Frequency Inverters series and features internal brake transistor and IP20 protection rating. It has a maximum rated motor power of 0.75 kW, an output nominal current of 2.6 A, and operates at a switching frequency of 4 kHz. The inverter supports three input phases and a maximum mains fuse of 10 A.
Internal Product Review
The 07.F4.S1D-3420 is a KEB F4 Combivert frequency inverter with three-phase input and IP20 protection. An internal brake transistor and 5 A maximum braking current support dependable deceleration performance in controlled drive applications. A 2.6 A nominal output current and 0.75 kW motor rating make the inverter a strong fit for light-duty motor control.
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Product Description:
The 07.F4.S1D-3420 is a frequency inverter manufactured by KEB for the F4 Combivert Frequency Inverters series. The unit functions as a variable-speed interface between the mains supply and a small AC motor, adjusting output frequency and voltage so the machine can coordinate speed, torque, and process timing without mechanical gear changes. Mounted inside a control cabinet, the inverter integrates with automation controllers through standard drive wiring and supports braking energy handling in duty cycles that involve frequent starts, stops, and repeated speed changes. This arrangement suits conveyors, feeders, and similar compact equipment that needs adjustable motor speed from a cabinet-mounted drive.
Within the compact housing size D, the inverter accepts a 3-phase mains feed through conductors up to 1.5 mm² and is safeguarded by a 10 A gG fuse. At nominal load, the power section delivers 1.8 kVA, corresponding to an output current of 2.6 A for induction motors. The cabinet-mount design carries a protection rating of IP20, so the unit is intended for installation inside an electrical enclosure. An internal brake transistor connects to an external resistor, with 680 Ω given as the typical value and 160 Ω as the minimum permitted for braking during deceleration. Heat produced by the power semiconductors is routed to an aluminum heat sink that projects into the airflow path inside the panel.
The drive supports motors up to 0.75 kW and can supply short-time currents of 4.6 A to overcome inertia during acceleration. Its carrier frequency of 4 kHz smooths the output waveform while limiting switching losses to a continuous dissipation of 45 W. Dynamic stops are assisted by a braking current that peaks at 5 A and is absorbed by the selected external resistor. Reliable service is maintained as long as the heat-sink temperature stays below 85 °C, helping the inverter maintain stable speed regulation and repeatable braking in compact machines.
