Siemens 6SE6400-4BE24-2FA0 MICROMASTER 4 Braking Resistor

The 6SE6400-4BE24-2FA0 is a high-performance braking resistor designed specifically for the MICROMASTER 4 series of AC drives. Its primary function is to dissipate the regenerative energy generated when an AC motor acts as a generator during deceleration or braking phases. With a high peak power rating of 84,000 W and a continuous load capacity of 4,200 W, this resistor provides a robust solution for large-scale industrial drives requiring frequent, high-inertia stops.

Features

• Series: MICROMASTER 4 Accessory
• Braking Capacity: 84,000 W (Peak), 4,200 W (Continuous)
• Resistance: 12 Ohm
• Voltage Rating: 500-600 V
• Protection Class: IP20
• Status: Phase-Out

Applications

• High-inertia braking applications (centrifuges, large fans)
• Rapid deceleration for production lines
• Hoist and crane motion control
• Emergency stopping of heavy-duty machinery
• Energy dissipation in regenerative industrial drive systems

Technical Specifications

Installation Guidelines

• Ventilation: Due to the heat generated during the dissipation process, the braking resistor must be mounted in a well-ventilated area, preferably with upward airflow to ensure the heat dissipates away from the inverter and sensitive electronics.
• Proximity: Keep the resistor as close as possible to the inverter’s braking module to minimize the length of high-power cabling, which reduces the potential for electromagnetic interference (EMI).
• Clearance: Maintain the specified dimensions for mounting and ensure surrounding materials are flame-retardant, as the surface temperature of the resistor increases significantly during operation.
• Safety: Connect the resistor to the dedicated braking terminals on the inverter or braking chopper module. Ensure that the circuit includes thermal protection—if the inverter software supports it, configure the resistor's thermal time constant to prevent overheating.