PCIM 2014: Foil resistors can be mounted with conductive adhesive
Isabellenhute's latest precision performance foil resistors, launched at the PCIM exhibition in Nuremberg, use the company's Isa-Plan process whereby three layers of manganin foil, copper substrate and an adhesive with good thermal conductivity (ceramic filled) are pressure bonded. This temperature resistant bonded combination of substrate and resistance foil ensures optimal dissipation of heat.
A small increase in the temperatue of the component has a pistive efect on long-term stability and long-term drift. Thuis means both resistors are well suited to applications in the automotive sector where there are high requirements in terms of temperature and load.
The resistors meet the international AEC-Q200 specifications. They can also be used in industrial applications such as frequency converters and power modules with DCB ceramic substrates.
The PMH-D and the PLU are designed for hybrid mounting with bonding technology. The bonding pads and the back side of the components are plated with a 1um layer of gold. This makes soldering and mounting with conductive adhesive possible.
This results in an ideal coupling that makes best use of the component surface. The resistors are designed to handle a constant load of up to 5W at 150 degrees C and a constant current of up to 50A (the PMH-D) and 70A (the PLU).The PMH-D is available as a 2Ohm resistor and the PLU as a 1Ohm resistor. Both resistors are designed as four-wire measurement resistors (Kelvin conversion) and meet RoHS guidelines.
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