Gold-plated bondable resistors adhere to AEC-Q200

12th May 2014
Nat Bowers

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.

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