CONOX® Metal Oxide Varistors

General Product Information

  • 100% Active Material
  • Wide Operating Voltage Range
  • Wide Range of Geometries
  • Mainly Available from Stock
  • Cross Reference Service
  • Custom Solutions Available
  • Flexibility

HVR offers a wide range of voltage dependent metal oxide resistors (Varistors). The CONOX range of HVR are metal-oxide varistors (MOV) manufactured with 90% of ZnO as the base ceramic element and 10% additional elements.

The standard range includes radial lead construction in 5 mm, 7 mm, 10 mm, 14 mm and 20 mm, as well as block varistors in different shapes and single discs up to 53 mm in diameter.

A selection of square discs are also available.

The CONOX range are suitable for use in a wide variety of electro-technical and electronic applications. Our components are continuously being developed and improved in accordance with customer requirements. These activities are based on intensive development and field testing combined with expert advice and service from our customers.

Technical Specifications are included in this section for our standard Metal Oxide range (CONOX 5 - 20 mm radial lead).

For further information on the block and disc varistors, please contact us.

Application and Production

CONOX Varistors represent an economic solution for protecting either single elements or equipment from the effects of overvoltage.

Correct selection of the varistor will ensure that it has no effect on the circuit to be protected in its standby condition.

If you require assistance in selecting the correct varistor type, please contact us. We can also offer a cross reference service.

 

Figure 1.

Figure 2.

U / I Characteristic

CONOX Varistors are voltage dependent resistors with a symmetric U / I - curve characteristic whose resistance value decreases with increasing voltage as illustrated in Figure 1.

CONOX Varistors are therefore suitable for both DC and AC applications.

This voltage dependancy is described by the non-linearity exponent n.

Composition

CONOX Varistors are metal oxide varistors manufactured with 90% Zinc Oxide as the base ceramic element and 10% additional elements. The general composition of this product series is illustrated in Figure 2.