Isabellenhuette unveils improved resistors

Other improvements include larger soldering and contact pads, which increase the mechanical stability of the solder joints during temperature and power-cycling and guarantee a better heat-flow into the PC board.

A new mechanical construction significantly increases the mechanical stability and internal heat resistance (Rthi as low as 15K/W), meaning that heat produced within the components is conducted efficiently to the terminations and out of the resistors.

VLx resistors are very small in size but have a high power rating in comparison to similar components.

Their operation temperature range is between -65C and +170C.

These properties guarantee successful application under full power, even at high temperature (size 1020: 2W permanent power at 140C, maximum current 45A, for example).

Some possible applications for VLx resistors are control systems for the automotive industry, power modules, frequency inverters, switch-mode power supplies and current sensors for semiconductor power hybrids.

Sample quantities are available from February 2011 with resistance values of 1, 3, 10 and 50mohm with tolerances of one and five per cent.

Serial production of the resistors is likely to start by mid-2011.