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Composition of a spring-loaded probe

December 6, 2018

Gold-plated canted coil spring contact rings arranged on a dark background
Gold-Plated Canted Coil Spring Contact Rings

A spring-loaded probe consists of three parts: a copper tube (barrel), a spring and a pin shaft. The pin shaft can be supplied with a variety of tip styles and different spring pressures to suit the application.

Diagram of a spring-loaded probe exploded view with barrel, spring and pin shaft
Spring-loaded probe exploded view

Tip and spring pressure selection

Choosing the right tip style and spring pressure ensures optimal contact with the test surface. Different tip profiles suit different test surfaces, while the spring pressure sets the contact force applied during testing.

Mounting and serviceability

The probe can be mounted in a socket connected to the circuit. This allows the test probe to be removed easily for repair or replacement and lets it be used for contact in a variety of applications.

Illustration of spring-loaded probes mounted in a test socket assembly
Probes mounted in a test socket

About SISE

Dongguan Spring-in-Spring Electronics Co., Ltd. (SISE), established in October 2011 and relocated to Chang'an Town, Dongguan in May 2018, designs, tests and manufactures elastic conductive electronic components. Its product line includes bidirectional coil spring contact fingers (SiS), single-turn spring fingers, cylindrical quick-swap self-locking connectors, male and female connectors with equal load rating, electric vehicle chargers and high-voltage power battery pack series connectors. The products carry multiple national patents and have passed international standard testing.

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