RZW02.1-003-015 Bosch Rexroth Indramat
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MPN: R911201281
The Bosch Rexroth Indramat RZW02.1-003-015 is part of the RZW Braking Resistors series and has a resistance of 68 Ohms with a power rating of 3 kW. This braking resistor features IP20 ingress protection, supports a maximum surface temperature of 80 °C, and weighs 2.3 kg. It has a width of 486 mm, depth of 92 mm, and height of 120 mm with a line cross-section of 2.5 mm².
Internal Product Review
The RZW02.1-003-015 is a Bosch Rexroth Indramat RZW braking resistor rated for 3 kW with 68 Ω resistance. A 15% operating factor and 300 s thermal time constant support stable heat management during intermittent duty. This unit stands out as a well-matched choice for controlled deceleration applications.
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Product Description:
Bosch Rexroth Indramat’s RZW02.1-003-015 is a braking resistor from the RZW Braking Resistors series. The module dissipates regenerative energy from servo or inverter drives, protecting bus capacitors from overvoltage during rapid deceleration or inertial overrun in automated machinery. By converting excess electrical energy into heat, it maintains stable DC-link voltage levels and protects connected power electronics from potentially damaging voltage increases.
The resistor has a rated power capacity of 3 kW, which is the maximum amount of heat it can safely dissipate during each duty cycle. Its cold resistance is 68 Ω, establishing the current that flows when the brake chopper connects the resistor across the DC bus. The duty rating of 15% SD indicates that the element may be energized for less than one-sixth of each cycle without exceeding its permitted average temperature rise. Each engagement period is limited to 18 s, while the permitted recovery interval is 102 s; these values support repetitive braking cycles with a peak-to-continuous power ratio of 4. A thermal time constant of 300 s indicates how long the aluminum housing takes to reach approximately 63% of its final temperature after a load step, which helps determine the airflow and spacing required around the unit.
The unit carries an IP20 rating, making it suitable for installation inside a switchgear cabinet where it remains protected from dripping fluids and accidental contact. The resistor body measures 486 mm in width, 120 mm in height, and 92 mm in depth, while its connection hardware uses M6 terminals that accept 2.5 mm² wiring. With a mass of 2.3 kg, the resistor adds a moderate load to panel shelves or other suitable mounting surfaces. Its maximum surface temperature is 80 °C, which requires normal cabinet airflow and adequate clearance from heat-sensitive components when the connected load remains above the minimum resistance of 30 Ω.
