Construction of the resistors ensures RoHS compliance as well as high accuracy. Termination conductors and ruthenium oxide resistive material are printed in a non-inductive pattern on a 96% alumina substrate, and the resistors also feature screen printed protection with tin-coated copper termination wires.
Availability in a choice of axial or radial configuration provides wide applicability including precision power supplies for electron microscopes, X-ray equipment, geophysical probes, semiconductor processing and particle accelerators. The PHVP family is also ideally suited to high-voltage industrial power supplies, for example in electrostatic spraying, powder coating, e-beam welding and insulation test equipment.
Where applications are not covered by the standard range, a custom design service is available. Further options include surface mount variants and gold-bondable pads.
The new precision resistors are available immediately and Welwyn can also advise on competitor equivalent parts for which the PHVP series offers direct drop-in replacement alternatives.