IKG4203 by Bosch Rexroth Indramat

The IKG4203 cable is produced by Bosch Rexroth Indramat and belongs to the IKG Motor Power Cables series. It is used to deliver three-phase power and protective earth to synchronous or asynchronous motors while also carrying auxiliary control lines in one jacketed assembly. Within an automation cell, this prefabricated cable links the drive amplifier to the motor connector so power, brake release, and sensor circuits travel in one managed harness. Using one cable for these functions helps keep routing organized around moving machine sections and reduces the number of separate cable runs between the cabinet and the motor.

The outer diameter is 29.8 mm, allowing routing through standard drag-chain separators without excess fill. Its capacitance of 1.1 nF/m adds reactive load to a high-frequency inverter and can influence permissible cable length before reflected-wave effects appear. Copper conductors have a DC resistance of 0.78 ?/km at 20 °C, which helps limit voltage drop and supports continuous current capacity. Each power core provides a cross-section of 25.0 mm², matching drives that deliver substantial phase current to large servo motors. During dynamic motion, the polymer insulation tolerates a flexing radius of 7.5×D, allowing repeated movement in gantry or transfer systems where the cable follows a carrier path.

The bundle is arranged as 4×25.0 + 2×(2×1.5) mm², so three-phase conductors, protective earth, and auxiliary lines are combined in the same assembly. The paired control conductors can be used for functions such as temperature monitoring or holding brake circuits, while the power contacts are assigned 3 + PE inside the factory-mounted INS0381/C25 circular connector. A bright orange jacket improves visibility on the machine, and the outer sheath is molded from PUR for abrasion, oil, and coolant resistance. When the cable is installed in a fixed run, the minimum bend radius can be tighter, which gives more flexibility at termination points and inside enclosures.