SPRING-LOADED CONTACT TECHNOLOGY WWW.PRECIDIP.COM TEL +41 32 421 04 00 [email protected] DESCRIPTION AND TECHNICAL SPECIFICATIONS • patented coaxial or in-line designs with integrated multifinger sliding contact (clip) establishing electrical continuity between body and piston. Functional principle PRECI-DIP spring-loaded contacts are made of a contact body or barrel, a piston and an helical compression spring. The electrical contact is established by the pressure against a fixed, flat area called the pad connector. An evolving line Based on this initial model, we have developed additional designs featuring particular advantages: The electrical multipoint connection between the mobile piston and the clip guarantees low, stable electrical resistance values without micro-discontinuities, even when the piston is moving or in case of vibrations, thus assuring maximum reliability. • contacts with a slant or polygonal piston. These designs lead to a radial force on the piston, resulting in a lower ohmic resistance. We produce since 1995 a wide range of dimensions with varying technical specifications (see table). CHARACTERISTICS STANDARD CONTACTS HOLLOW PISTON DESIGN IMPROVED-DESIGN CONTACTS SL ANT PISTON DESIGN POLYGONAL PISTON DESIGN «HIGH RELIABILITY» CONTACTS CLIP COA XIAL DESIGN CLIP IN-LINE DESIGN ENVIRONMENTAL Operating temp. range - 55°C to + 85°C (music wire) / + 125°C (stainless steel) MATERIALS (RoHS-compliant) Piston Barrel Spring Clip – Gold plated machined brass Gold plated machined brass Gold plated music wire / Stainless steel – Gold plated BeCu C17200 MECHANICAL Min. diameter Min. initial height Travel / height ratio Max. travel (stroke) Min. initial spring force Mechanical life* 1.5 mm 3 mm Max. 0.3 2 mm 0.2 N 100'000 cycles 1.5 mm 6 mm Max. 0.2 2 mm 0.2 N 50'000 cycles Max. 15 m Ω 1 A cont. / 2 A peak Max. 10 m Ω 3.5 A cont. / 7 A peak 1.8 mm 5 mm Max. 0.2 1.0 mm 10 mm Max. 0.15 1.5 mm 0.2 N 40'000 cycles ELECTRICAL Contact resistance** Max. operating current*** Max. 20 m Ω 2 A cont. / 4 A peak * Tested at nominal stroke with perpendicular pad connector area ** Static measurement in halfway position of piston travel *** Above max. current values are for single contacts in free air and for 10°C temperature rise. Values are indicative and may be affected by contact force, static or dynamic applications, shocks or vibrations