12.DR.B08-2851 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB 12.DR.B08-2851 is part of the DR Motor Input Chokes series and is designed for three-phase applications. It features an inductance of 2.93 mH and a rated current of 10 Amps at 400 Volts. The motor input choke measures 148 x 80 x 140 mm and weighs 3 kilograms.
Internal Product Review
The 12.DR.B08-2851 is a KEB DR motor input choke well-suited for 400 V three-phase drive applications. The 10 A rating and 2.93 mH inductance support effective input smoothing and dependable performance in motor control panels.
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Product Description:
The 12.DR.B08-2851 input choke is produced by KEB for the DR Motor Input Chokes series and is intended for installation between the main power supply and an inverter or drive. By adding series inductance, the choke limits line-side current rise and attenuates differential-mode noise, protecting both the upstream network and the connected drive from rapid current changes. In industrial automation systems, it improves the power factor of three-phase motor circuits and reduces harmonics that could otherwise stress semiconductors and capacitors inside frequency converters.
The device is designed for a nominal line voltage of 400 V, and its circuitry can carry a continuous phase current of 10 A without saturation. Because the choke is built for a three-phase system, its windings share the magnetic core and balance the magnetic flux under symmetrical load conditions. An inductance of 2.93 mH provides the impedance needed to moderate inrush current when the drive’s DC link charges while allowing stable torque production under load. The unit operates within a supply frequency range of 45–65 Hz, accommodating the frequency tolerance of common industrial power networks. Mounting centers measuring 136 × 63 mm and oblong slots measuring 4.8 × 8 mm accommodate standard cabinet hardware.
The assembly weighs 3 kg, allowing it to be secured to vertical mounting plates without additional bracing. Its internal copper and core losses total 33 W at nominal load, which should be considered when determining the required enclosure airflow. The terminals accept conductors up to 2.5 mm², providing suitable capacity for the rated current while keeping the wiring compact. Overall dimensions of 148 × 80 × 140 mm allow the choke to fit beside contactors or fuses in switchgear with a depth of 200 mm. Its rectangular footprint supports a vertical coil orientation and helps maintain clearance above nearby busbars.
