RZW02.1-015-025 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-015-025 is a braking resistor from the RZW Braking Resistors series. It has a power rating of 15 kW with an 18 ohm resistance and a protection class of IP20. The resistor measures 490 mm in width, 400 mm in depth, 270 mm in height, and weighs 13 kilograms.
Internal Product Review
The RZW02.1-015-025 is an RZW braking resistor engineered for dependable dynamic braking, with 15 kW power data and 18 Ω resistance. IP20 protection and a 25% operating factor support clean panel integration and stable thermal behavior in controlled industrial settings. A well-matched choice for drive systems requiring consistent braking performance.
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Product Description:
The RZW02.1-015-025 is a dynamic braking resistor produced by Bosch Rexroth Indramat within the RZW Braking Resistors series. Installed on the DC bus of a drive controller, it converts surplus regenerative energy into heat as the connected motor decelerates. This energy conversion helps prevent DC-bus overvoltage faults during braking cycles in automated machinery. The resistor is intended for drive systems that require controlled dissipation of energy returned by a motor or other regenerative load.
The unit is rated for continuous power dissipation of 15 kW. Its fixed resistance of 18 Ω, together with a minimum connectable resistance of 17.5 Ω, suits the impedance range of compatible Rexroth inverters. A 25% SD duty factor permits the resistor to conduct for one quarter of each operating period. Its thermal response is governed by a 100 s thermal time constant, which must be considered when planning repeated braking cycles. After a braking event, the assembly may require an idle period of up to 90 s so that its internal temperature can return to a safe operating level. Design code 1, line 2, and the B2 resistor classification indicate the element geometry and winding arrangement used in the assembly.
During each braking cycle, the resistor may remain energized for a maximum of 30 s; a longer on-time may exceed its thermal capacity. The IP20 enclosure helps prevent accidental contact with live components, but the resistor must be installed inside a ventilated panel. An M10 mounting thread secures the housing to a suitable cabinet surface. The unit measures 490 mm wide, 400 mm deep, and 270 mm high, so the selected installation area must provide adequate space and airflow around the housing. Its total mass is 13 kg, requiring a mounting surface and fasteners that can support the load under normal machine vibration. The electrical terminals accept conductors with a minimum cross-sectional area of 6 mm², helping limit resistive losses between the drive DC bus and the braking resistor. Cable routing should also preserve ventilation clearances and keep conductors protected from heat generated during repeated deceleration cycles.
