18.Z2.F04-1003 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 18.Z2.F04-1003 belongs to the Z2 Three Phase Motor Chokes series and has a rated current of 50 Amps with a rated voltage of 400 VAC. The choke features an inductance of 0.184 mH, supports maximum output frequencies up to 1600 Hz, and weighs 11.2 kilograms. It also has a copper weight of 3.5 kilograms and impedance voltage of 20%.
Internal Product Review
The 18.Z2.F04-1003 is a KEB Z2 three phase motor choke built for dependable drive protection at 400 VAC and 50 A. Stable 0.184 mH inductance and support for switching frequencies up to 16 kHz make the unit especially well suited for demanding inverter applications. A well-engineered choice for cleaner motor operation and confident industrial integration.
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Product Description:
The 18.Z2.F04-1003 motor choke is manufactured by KEB and is part of the Z2 Three Phase Motor Chokes series. The device is wired in series with the output of a variable-frequency drive to introduce controlled inductance, attenuate high-frequency components, and reduce the steep voltage edges that stress motor insulation in automated conveyors, compressors, and other three-phase installations. Its laminated core sits inside a steel frame that can be fastened through 8.5 mm mounting holes on the machine backplate. This arrangement provides a secure installation while allowing the choke to filter the drive output before power reaches the connected motor.
The choke supports a line voltage of 400 VAC and is rated for a continuous load of 50 A. Its inductance of 0.184 mH provides the reactance needed to filter inverter pulses, while an impedance voltage of 20% indicates the voltage drop at nominal current. Internal copper windings generate a thermal loss of 92 W, and this heat must be removed by free-air convection around the 245 mm × 260 mm × 180 mm housing. A wire cross-section of 16 mm² may be used on the input and output terminals, matching the current rating and minimizing conductor temperature rise. Adequate space around the housing allows heated air to rise without being obstructed by nearby cabinet components.
The permitted switching frequency ranges from a minimum of 5 kHz to a maximum of 16 kHz, allowing the choke to operate with common PWM inverter settings while keeping core losses within acceptable limits. Downstream motors may operate at a fundamental output frequency of up to 1600 Hz, supporting applications that require high motor speeds. The winding insulation tolerates a peak line voltage of up to 550 V, reducing the risk of insulation damage from inverter-generated voltage pulses. The choke has an overall mass of 11.2 kg, including 3.5 kg of copper, which supports stable thermal behavior during extended operating cycles. Its enclosure height also provides clearance below standard busbars when the unit is installed in a control cabinet.
