TT Electronics Welwyn Components has added to its range of high voltage chips to make them suitable for applications which require higher voltage ratings than those achievable by a conventional chip resistor.

The thick-film LHVC series is available in 0805, 1206 and 2010 sizes with continuous ratings of 300V, 400V and 800V respectively. The parts will withstand short term overloads up to 3kV. For applications requiring higher voltage ratings than this, the HVC Series should be used.

Resistance values range from 50kohms to 10Mohms.

To construct the new chip Pd/Ag terminations are applied to the top and bottom of an alumina substrate. A resistive element is printed between the top face conductors, which is then adjusted to value and protected. A wraparound conductor is applied to join the top and bottom sides. The terminations are electroplated with an Ni barrier layer prior to plating with an Sn finish.