LONDON Westcode Semiconductors Ltd. (Chippenham, England) has introduced a water-cooled heatsink for its power semiconductors. The nickel-plated copper heatsink has a 127-mm diameter contact plate, making it suitable for press-pack devices with electrode contacts up to 125-mm diameter.
Westcode, a subsidiary of Ixys Corp. (Santa Clara, Calif.), is a manufacturer of thyristors, silicon-controlled rectifiers (SCRs) and rectifiers ranging up to 6500 volts and 15,000 amps capabilities. Westcode suppliers semiconductor devices for use in welding, as and dc motor drives, rectifier supplies, uninterruptible power supplies, motor soft starts, transportation, induction heating, power conditioning, high-energy physics and other industrial uses.
The latest heatsinks incorporate geometric water channels designed to ensure low values of thermal resistance, even at moderate coolant flows, while retaining a robust structure compatible with the high clamping force required by large area power semiconductors. The geometric design used for the water channels also ensures a highly uniform cooling over the entire surface area.
Typical heatsink to input water thermal resistance, for flow rate of 10 L/min, is 4.3 K/kW (two coolers plus one semiconductor) and 5.6 K/kW (three coolers plus two semiconductors).
"Typical applications for the coolers would be in megawatt power level drives and high power rectifiers, such as in heavy industrial applications, or for electric trains' trackside substations, as well as all applications in the electricity generation and distribution. The high efficiency cooling provided with these coolers, enables the customers to achieve high power density in their systems with much reduced footprint," said Frank Wakeman, marketing and technical support manager for Westcode, in a statement.
The cooler is available in two versions: XW180GC34A without integral connecting bus bar and XW180GC34B with integral connecting bus bar.
Infineon offers power modules
RF FET promises improvements for L-band users