RKL4739 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4739 is a power cable from the RKL Motor Power Cables series. It features a 4x50.0 mm² cable construction with a power wire rated voltage of 600 V AC and a control wire rated at 300 V. The cable has a PUR matte jacket in orange and an outer diameter of 36.8 mm.
Internal Product Review
The RKL4739 is a Bosch Rexroth Indramat motor power cable designed for demanding automation environments, featuring a 50.0 mm² power wire cross-section and rated for 600 V AC. Its PUR matte jacket ensures durability and chemical resistance, while the orange color improves visibility in industrial settings. The cable's construction with 4 power conductors and multiple control wires makes it an excellent choice for high-capacity motor installations.
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Product Description:
The RKL4739 motor power cable is manufactured by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. It serves as the primary energy path between a drive controller and a servo motor in automated machinery, carrying high current along with auxiliary sensor lines so that motion axes receive both power and required feedback through a single routed assembly. On the controller side, the cable uses the K50 connector variant, while the motor end terminates in a Terminal Box so field wiring can be landed without special crimp tooling.
The cable architecture follows the 4x50.0 mm² + 2x(2x2.5 mm²)StC layout, in which four phase conductors each have a cross-section of 50.0 mm², while paired control cores support signal transmission. These phase cores withstand up to 600 V AC, allowing direct connection to medium-power inverter outputs. Electrical losses are limited by a conductor resistance of 0.386 Ω/km, which helps the assembly remain within thermal limits during continuous duty. With an external diameter of 36.8 mm, the cable accommodates its conductor set while still fitting standard energy-chain bend radii. Four conductors are dedicated to power transfer, and the remaining lines support signaling and the protective-earth network used in multi-axis installations.
A separate control bundle inside the sheath carries auxiliary cores rated for 300 V, and each of these uses a 2.5 mm² cross-section for control and sensor circuits. The insulation system has a line-to-shield discharge capacity of 1.3 nF/m, supporting predictable common-mode behavior at high switching frequencies. A chemical-resistant PUR (Adhesion-Free, Matte) jacket in RAL 2003 orange helps distinguish the assembly from feedback or pneumatic hoses while tolerating oil exposure and repeated flexing. This jacket also supports use in machine environments where abrasion resistance and easy cable routing are important during regular operation.
