Precious Metal Spring Contacts

Electrical Relay and Connection Technology

Precious Metal Spring Contacts

Our precious metal spring contacts are available in fine patterns, which contributes to product miniaturization.

Multi-wire brush contacts have a multi-point contact structure which consists of fine wires in parallel bunches and provides high contact reliability. Multi-wire brush contacts can reliably read electrical signals from fine patterned circuits, thereby miniaturizing the product size. Scratch brush contacts, in combination with clad materials (see Precious Metal Clad Materials), use high-performance precious metal contact materials only in limited areas. There are various contact materials available with a high cost performance to suit various applications. Various types of brush contacts are available in multiple contact shapes, from cost-effective standard products to advanced customized products.

Multi-wire Brush Contact


  • Sliding system with high contact reliability
  • Spring materials for low torque operation
  • Use of spring materials gives stable contact force
  • Can be made smaller than other contact systems
Diameter of wire (mm) φ0.05~φ0.30
Number of wires 3 to 28
Multi-wire Brush Contac 1
Multi-wire Brush Contac 2

Scratch Brush Contact


  • Prolongs service life, and reduces size and weight
  • Excellent cost performance
  • Available as not only spring contacts but also other various types of contacts
  • The contact area can be rounded to suit the product application.
Plate thickness (mm) 0.05~0.20
Brush width (mm) 0.2~0.4
Number of contact points 2~4

Various end shapes are available to fit the shape of the printed wiring board. Please contact us for further details.

Scratch Brush Contact 1
Scratch Brush Contact 2


Potentiometers, trimmers, encoders, sensors for automotive use (throttle sensors, pedal sensors, vehicle height sensors, and sensors for exhaust gas recirculation (EGR) systems), etc.

Precious Metals for Brushes and their Properties
Composition (wt%) Density
Melting point
Tensile Strength
Pt Au Ag Pd Others
SP-1 10 10 30 35 Cu,Zn 11.9 1,098 25.5 112 ~340 1,250
SP-2 5 70 10 Cu,Ni 15.5 955 13.3 106 ~340 1,210
SP-3 0.5 40 43 Cu 10.8 1,077 28.3 119 ~320 1,010
Ag-Pd-Cu 40 40 Cu 10.7 1,040 12.5 109 ~420 1,480
TK-1 29.5 40 Cu, etc. 10.5 1,050 10.5 110 ~495 1,740

For other materials, please contact us for further details.

※The property values are provided for reference purposes only and the adjustable range may vary depending on the shape. Therefore, please confirm

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