09.F4.S1D-M420 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 09.F4.S1D-M420 is a frequency inverter from the F4 Combivert Frequency Inverters series with a motor power of 1.5 kW and an output power of 2.8 kVA. It supports a mains voltage of 400 V, an input current of 4.5 A, and operates at an input frequency of 50/60 Hz. The inverter offers a maximum output frequency of 1600 Hz and has a rated switching frequency of 4 kHz.
Internal Product Review
The 09.F4.S1D-M420 is a KEB F4 Combivert frequency inverter configured for 400 V three-phase input. With 1.5 kW motor power and 4.1 A output current, the design feels well matched for precise drive control in industrial service. A 1600 Hz maximum output frequency stands out as a strong performance advantage.
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Product Description:
The 09.F4.S1D-M420 is a three-phase frequency inverter from KEB that belongs to the F4 Combivert Frequency Inverters series. Designed for cabinet mounting, the unit converts a fixed 400 V AC mains supply into a variable output that adjusts motor speed and torque in automated machinery, conveyors, and process equipment. By modulating its switching frequency and using integrated braking circuitry, it supports motor control without auxiliary contactors.
With a housing type D enclosure, the inverter shares mechanical dimensions common to other F4 units and provides adequate space for bus bars and the internal brake chopper. The mains side accepts a three-phase 50/60 Hz supply at 400 V and draws up to 4.5 A during rated operation, so upstream wiring and protection can be sized accordingly. Internally, the inverter switches at 4 kHz, and it can deliver an output frequency from zero to 1600 Hz for high-speed spindle or blower duties. When fully loaded, apparent output power reaches 2.8 kVA, which matches many 1 kW to 2 kW motor frames while keeping distortion within drive limits. The input uses a three-wire connection, and the drive requires a clean 50/60 Hz line to maintain proper DC bus charging.
On the motor side, it supports continuous mechanical output of 1.5 kW and can supply up to 4.1 A RMS across all three output phases. Dynamic deceleration is handled by an integrated brake chopper rated for 5 A, which must be paired with an external resistor of at least 160 Ω to avoid thermal overload. For branch protection, a maximum fuse of 10 A is recommended, allowing selective tripping without nuisance shutdowns. Overall thermal dissipation is limited to 60 W, so standard panel ventilation is usually sufficient. The inverter’s power section maintains balanced phase current under load changes without exceeding the stated limits.
