Welwyn's latest thick-film chip resistor operates to 250°C

Four termination options provide support for the wide range of assembly methods used in high-temperature designs, including wire bonding, adhesive and soldering processes.

Planar gold G-type and PtAg P-types are produced by printing electrodes, resistor and over-glaze onto an alumina substrate, then laser trimming the resistance elements to the required value. These devices are suitable for attachment with conductive adhesives; G-type resistors with gold terminations are additionally suited to wire bonding.

The EW versions feature thick-film PtAg electrodes printed onto alumina
along with the resistor material and over-glaze. They are also ideal for
adhesive assembly, having terminations coated with a polymer silver
wrap-around. F-types are made in the same way as EW, and then prepared for
solder assembly by plating with a nickel barrier and 100% tin.

As well as high-temperature performance, the HTCR series includes
non-magnetic resistors, providing solution for applications like medical MRI
scanning equipment. Furthermore, the series' absence of organic materials
makes HTCR resistors the perfect choice for high vacuum space and scientific
designs.

The new high-temperature resistors series are RoHS compliant, available now,
and supplied on tape-and-reel for automated assembly.