PCB-mounted heatsink is designed for power resistors

Designed to optimise the thermal performance of TT Electronics’ WMHP series power resistors, the WMHP-HS heatsink has been released.

According to the company, it provides a combination of high surface area, superior cooling performance, compact dimensions and light weight. The PCB mounting heatsink is intended for use in power supplies, power amplifiers, motor drives and inrush current control applications requiring resistors operating in the 20 to 100W range.

The WMHP-HS heatsink is aimed at designers using TO220 or TO247 power resistors in compact power electronic assemblies in the industrial and medical markets. Factors driving the demand for this type of product are the growth in distributed power management and motion control in industrial and automated systems, and the pressure to reduce size and weight whilst increasing cooling effectiveness and product reliability.

Extruded from 6063-T5 aluminium, the WMHP-HS heatsink’s compact footprint of 42 x 25mm minimises demand for PCB real estate. Its low thermal resistance keeps assemblies cool and improves reliability, adds TT Electronics. Reducing overall product weight and assembly time, the heatsink uses two solderable tinned brass pins instead of fixings to secure it. It has a black anodised finish, and features an optimised profile with ridged fins for high surface area and low mass.

A TO-220 package resistor may be fitted to either side of the heatsink as the thermal performance is the same for both mounting surfaces. Furthermore, two packages may be fitted, one each side, provided the total power dissipated does not exceed the rating of either. A TO-247 package can be fitted to the wider of the two mounting surfaces.

TT Electronics claims that the WMHP-HS heatsink is the lightest, most effective PCB mounted heatsink specifically designed for power resistors.

TT Electronics provides engineered electronics for performance critical applications. It works with customers in the transportation, industrial, medical, and aerospace and defence sectors.

It has headquarters in Woking, UK, and employs approximately 4100 staff, operating  from 22 locations around the world. It has three divisions: Global Manufacturing Solutions, Power Electronics and Sensors and Specialist Components.



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