12.F4.F1E-3440 KEB
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The KEB 12.F4.F1E-3440 is a frequency inverter from the F4 Combivert Frequency Inverters series with a 3-phase input and a maximum rated motor power of 4 kW. It features a braking transistor option, operates with a nominal input current of 10.5 Amps, and provides an output nominal current of 9.5 Amps. This inverter supports a 400 V supply voltage class and has an IP20 protection rating.
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Product Description:
The 12.F4.F1E-3440 is a frequency inverter manufactured by KEB as part of the F4 Combivert Frequency Inverters series. It converts fixed-frequency mains power into a variable output suitable for precise speed and torque regulation of industrial AC motors. The unit uses the compact Housing Design E, and its power terminals accept conductors up to a line cross section of 2.5 mm². Screw clamps on these terminals are tightened to 0.5 Nm, supporting secure installation inside switchgear and automation cabinets. The compact format also helps the inverter fit panel layouts where mounting space is limited.
Incoming power is supplied through a three-phase network in the 400 V class, and the drive draws a nominal input current of 10.5 A while delivering an output rated at 6.6 kVA. The corresponding nominal output current is 9.5 A, which suits medium-frame motors on constant-torque loads. Vector processing uses field-oriented control, helping the inverter maintain stable torque during acceleration, deceleration, and low-speed operation. A built-in braking transistor can switch an external resistor during deceleration so regenerated energy is dissipated outside the power stage. The maximum mains fuse rating is 20 A.
The cooling path is sized so that the heat sink surface can reach a maximum temperature of 73 °C without derating. At that thermal limit, the inverter corresponds to a motor rating of 4 kW, making it suitable for steady industrial duty where load changes remain within the configured drive limits. The IP20 enclosure is intended for installation inside a control panel, where cabinet airflow and separation from dust or moisture are managed by the machine enclosure. Safe dynamic braking is maintained when the external resistor is at least 50 Ω, which helps protect the braking transistor during repeated deceleration events.
Frequently Asked Questions about 12.F4.F1E-3440:
Q: What braking option is included with the 12.F4.F1E-3440 frequency inverter?
A: The 12.F4.F1E-3440 inverter is equipped with a braking transistor for dynamic motor control during deceleration.
Q: What is the maximum rated motor power supported by the 12.F4.F1E-3440 inverter?
A: This model is rated to handle motors up to 4 kW for standard operation.
Q: What type of input phases does the 12.F4.F1E-3440 frequency inverter require?
A: The 12.F4.F1E-3440 operates on a three-phase electrical input, suitable for industrial supply systems.
Q: What level of protection does the 12.F4.F1E-3440 frequency inverter offer?
A: This inverter is rated with an IP20 protection level, providing basic protection against solid objects but no protection against water.
Q: What type of motor control method is used in the 12.F4.F1E-3440 frequency inverter?
A: The inverter uses field-oriented control, which provides precise dynamic speed and torque regulation of the attached motor.
