December 22, 2024 
Professional magazine and portal dedicated to electronics 
Vishay introduced a new series of direct water cooled wirewound resistors that offers ultra high power dissipation to 9000 W with almost no external radiation. Available in six compact sizes ranging from 38 mm by 178 mm to 38 mm by 410 mm, Vishay MCB DCRF series devices are designed to save space and increase reliability over standard wirewound resistors.
The resistors handle ten times the power of natural cooled devices in the same size, and two times the power of indirect water cooled devices. By replacing multiple components with one resistor, the DCRF series allows designers to lower costs, simplify layouts, and reduce the size of their end products. The devices’ modular structure enables a multi-resistive element option.
Optimized as load, filter, snubber, and discharge resistors in large drives, HVDC, and battery management systems for industrial applications, the resistive elements of DCRF series devices are in direct contact with water and insulated by ceramic tubes, eliminating the need for a heatsink.
