The spring finger contacts can be delivered without surface treatment on the outside (Au/Gold plating). We strongly suggest to use standard as much as possible About Optional Surface Treatment
O Good weldability o Poor resistance to oxidation, especially in high humidity environment Other electroplating possible on demand O Higher resistivity to bad exterior environment (humidity, temperature) o Higher conductivity (gold is a highly conductive material) Sn (Tin) O Protect the inner core (CuBe) from oxidation o Ensure a high adhesion force between the electroplating layers (with the optional gold electroplating for example) o Withstand high friction level o Good weldability on PCB Outside Electroplating (Optional): Au (Gold) Inner Electroplating (mandatory/standard): Ni (Nickel) However, not using standard material might lead to higher costs and worst characteristics (as electrical than mechanical characteristics).That is why we recommended to use as much as possible Copper and Beryllium (CuBe) as core material for your spring finger contacts (for standard contacts as well as for your custom parts). O Lower mechanical characteristics than Beryllium Copper (CuBe) o Lower electric conductivity O Excellent mechanical characteristics (>300k cycles) o Good thermal conductivity o Good electric conductivity (electrical resistance is few milliohms) o Easy forming Stainless Steel, less common
What is the composition of a Spring Finger Contact? Core material: Beryllium Copper (CuBe), standard and most common. In this blog post, we will explain the what,why and how of spring finger contacts for PCB grounding and connection. Spring finger contacts come in a variety of different shapes and sizes. Spring fingers can be used both for grounding and connection purposes. These spring parts are designed to make reliable contact between two PCB or from a PCB to the frame, in harsh conditions (vibration and humidity). PCB spring finger contacts provide an easy, low-cost way to ground circuit board and to prevent EMI noise and static electricity on an electronic assembly. Especially for automotive projects (dashboard, headlight) but also on electrical bikes projects (batteries connection), medical applications (sensors) and military project (weapons or vehicles).Spring finger contacts are a type of connector used to make electrical contact with a printed circuit board (PCB). Spring finger contacts are widely used on on-board electronic projects. These contacts are made to support harsh environment (humidity, temperature, and vibrations). Catalogue of Standard Spring Finger Contacts What is a Spring Finger Contact?Ī spring finger contact is a small mechanical part used to make connection or grounding on electronic projects.
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