Gold-plated bondable resistors adhere to AEC-Q200

12th May 2014

Nat Bowers

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Well suited to applications in the automotive sector in which there are high requirements in terms of temperature and load, Isabellenhütte has introduced the PMH-D and PLU precision performance foil resistors. They can also be used in industrial applications such as frequency converters and power modules with DCB ceramic substrates.

The PMH-D and PLU precision performance foil resistors are produced using the Isa-Plan process. In this process, three layers of manganin foil, copper substrate and an adhesive with good thermal conductivity (ceramic filled) are pressure bonded. This highly temperature-resistant bonded combination of substrate and resistant foil ensures optimal dissipation of heat. A small increase in the temperature of the component has a positive effect on stability and long-term drift.

The PMH-D (6.7x3.4x0.7mm) and the PLU (10.4x6.4x0.6mm) are designed for hybrid mounting with bonding technology. The bonding pads and the back side of the component are plated with a 0.1μm layer of gold. That makes soldering and mounting with conductive adhesive possible. The result is a suitable thermal coupling that makes best use of the available component surface.

Meeting the international AEC-Q200 specifications, the resistors are designed to handle a constant load of up to 5W at 150°C and a constant current of up to 50A (PMH-D / size 2512) and 70A (PLU / size 3924). The PMH-D is currently available as a 2mΩ resistor and the PLU as a 1mΩ resistor. Both are designed as four-wire measurement resistors (Kelvin connection) and fulfil the requirements of RoHS guideline RoHS 2011/65/EU.