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CHARACTERISTICS STANDARD CONTACTS IMPROVED-DESIGN CONTACTS «HIGH RELIABILITY» CONTACTS
HOLLOW PISTON SLANT PISTON POLYGONAL PISTON CLIP COAXIAL CLIP IN-LINE
DESIGN DESIGN DESIGN DESIGN DESIGN
ENVIRONMENTAL
Operating temp. range - 55°C to + 85°C (music wire) / + 125°C (stainless steel)
MATERIALS (RoHS-compliant)
Piston Gold plated machined brass
Barrel Gold plated machined brass
Spring Gold plated music wire / Stainless steel
Clip – – Gold plated BeCu C17200
MECHANICAL
Min. diameter 1.1 mm 1.5 mm 1.8 mm 0.8 mm
Min. initial height 2.5 mm 5 mm 4.5 mm 9 mm
Travel / height ratio Max. 0.3 Max. 0.2 Max. 0.2 Max. 0.15
Max. travel (stroke) 2 mm 2 mm 1.5 mm
Min. initial spring force 0.2 N 0.2 N 0.2 N
Mechanical life* 100'000 cycles 50'000 cycles 40'000 cycles
ELECTRICAL
Contact resistance** Max. 15 m Max. 10 m Max. 20 m
Max. operating current*** 1 A cont. / 2 A peak 3.5 A cont. / 7 A peak 2 A cont. / 4 A peak
180
*** 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
CONTACT TECHNOLOGY
SPRING-LOADED CONTACTS
SPRING-LOADED CONTACTS
Spring-loaded contacts were initially designed since 1995 for
mobile phones. The application requires miniature, reliable,
contacts with very high mating cycles count at low cost.
The basic design of spring-loaded contact with hollow piston
consists of a contact body or barrel, a contact member or
piston and an helical compression spring. The piston is retained
in the barrel by a crimp.
The electrical contact is established by pressure between the piston
and a fixed, flat, conducting area of the opposite part.
Based on this initial model, new contacts with improved
characteristics were designed:
• Low resistance spring-loaded contacts with shaped piston
• High-reliable contacts with clip. This contact design is protected by
international patents
Main advantages
• Very long life time
• Many types of terminations available (see page Introduction)
• Small dimensions for use in applications with limited space (min.
contact height 3 mm, min. contact diameter 1 mm)
• Very good resistance to shocks and vibrations
• Best adapted where conventional connection solutions cannot
satisfy the application requirements:
In case of important positioning tolerances of the connectors
parts
For compensation of errors of parallelism and flatness
To make connection with pivoting, rotating or non parallel
mating movement
For connections with sliding mating action (push and lock)