THE SPRING- LOADED CONTACT - PRECI-DIP SA

WWW.PRECIDIP.COMPRECI-DIP DURTAL SA · 2800 DELEMONT · SWITZERLANDTHE SPRING-LOADED CONTACTA modern alternative to conventional connection solutionsSuperior technical characteristicsWell proven reliability in serviceEasy, cost-effective integration

SPECIFIC ADVANTAGESA WELL PROVENTYPE OF CONTACTThe first applicationsIn 1995, we designed our first springloadedcontacts for mobile telephony.At this period of time, the marketfor mobile phones was expandingat a very fast rate. The requests ofthe customers concentrated on threebasic requirements: miniaturisation,reliability, low cost. The new springloadedcontact with its helical compressionspring, presented by PRECI-DIP, was the perfect answer.Research and designIn order to respond to the requirementsof this application, we developeda variety of innovative solutions,requiring a considerable investment.We also acquired a specificknow-how, which we now makeavailable to you.Admits important positioning tolerances of the connectors.Compensates errors of parallelism and flatness.A developing marketThanks to its numerous advantages,the spring-loaded contacts quicklyfound uses in a variety of otherapplications.The ease of integration and the inherentsimplification of the mechanicaldesign and assembly of electronicequipment brought our connectorsinto an omnipresent position on theconnectors market. Presently, we canaffirm that PRECI-DIP is one of theworld leaders in the production ofspring-loaded contacts.Connects surfaces non-perpendicular to the contactaxis.Connects pivoting or rotating elements.General characteristics- Very long lifetime: up to 100,000cycles;- Excellent electrical characteristics;- Very good resistance to shocks andvibration;- Small dimensions for use in applicationswith limited space;- SMD, through hole, press-fit orwire soldering terminations;- Very good design flexibility: floatingcontact, double action contact;- Many product versions, from 3 mmcontact length upward;- Tape & Reel or carrier packagingfor automatic assembly equipment.Connects with sliding mating action (push & lock)e.g. audio connectors, camera lenses, etc.Suitable for blind matings: connection solution forconfined assemblies.The connectors can be supplied on tape & reel for processing on automatic pick and place assembly lines.

TECHNOLOGY OF SPRING-LOADED CONTACTDESCRIPTION ANDTECHNICAL SPECIFICATIONSFunctional principlePRECI-DIP spring-loaded contactsare composed of a contact body orbarrel, a piston and a helical compressionspring. The electrical contactis established by the pressureexerted by the spring of the pistonagainst a fixed, flat area of theopposite part. This is currently calledthe «dead connector».Characteristics Standard contacts «High Reliability» contactsPiston Slant piston Clip Clip+ barrel type + barrel coaxial design in-line designAn evolving lineBased on this initial model, we havedeveloped additional designs featuringparticular advantages:- contacts with a slant spring bearingsurface of the piston. Thisdesign exerts a lateral force on thepiston, resulting in a lower ohmicresistance.- patented contact design with integratedmultifinger sliding contactestablishing electrical continuitybetween the contact body and thepiston. This solution, protected byinternational patents, comes in twoversions: «coaxial» type and «inline»type.The electrical multipoint connectionbetween the mobile pistonand the clip guarantees low, stableelectrical resistance values withoutmicro-discontinuities, evenwhen the piston is moving or incase of vibrations, thus assuringmaximum reliability.We can produce a wide range ofdimensions with varying technicalspecifications (see table).Contact us!We will be happy to help you withadditional information on existingproducts and their technical data orfor a study of a customised product.Please visit us at www.precidip.comor mail us at: sales@precidip.comEnvironmentalOperating temp. range - 55 to + 125 °CMaterialsPistonBarrelGold plated machined brassGold plated machined brassSpringStainless steel / gold plated music wireClip – – Gold plated Gold platedBeCu C17200 BeCu C17200MechanicalMin. diameter 1.8 mm 1.5 mm 1.8 mm 1.0 mmMin. initial height 3 mm 6 mm 5 mm 10 mmTravel / height ratio Max. 0.3 Max. 0.2 Max. 0.2 Max. 0.15Max travel (stroke) 2 mm 2 mm 1.5 mm 1.5 mmMin. initial spring force 0.2 N 0.2 N 0.2 N 0.2 NMechanical life Min.100'000 cycles Min. 50'000 cycles Min. 40'000 cycles Min. 40'000 cyclesElectricalContact resistance Max. 15 mΩ* Max. 10 mΩ* Max. 20 mΩ Max. 20 mΩMax operating current 3.5 A cont.** / 7 A peak 2 A cont.** / 4 A peak* 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.

EXAMPLES OF APPLICATIONSMOBILECOMMUNICATIONTERMINALS11. Connector with integrated guiding system fordocking station for professional mobile radio.2. Connector with holding bracket for remotemicrophone and control unit for mobile radio.3. SIM card connector in mobile phones and professionalmobile radios4. Connector for sealed assembly for mobile phonebattery.5. SMD spring-loaded board-to-board connectorfor blind assembly on professional mobile radio.6. Double action connector, cover position detectoron mobile phone.7. SMD connector for automatic assembly formobile phone loudspeaker.324567PORTABLE DATA PROCESSINGAND ACQUISITION UNITS1. Battery connector on portable data processingunit.2. Connector for security control loop on automaticcash dispenser, banking and vendingmachines.3. SMD connector for docking station for tablett-PC, PDA and bar code readers.231VEHICLE EQUIPMENT1. SMD spring-loaded and dead connector fordash board add-on for telecommunicationequipment.2. Connector for press-fit assembly and connectionto removable operation panel for car radio.3. SMD connector for internal dash board connection.231AIRCRAFT, AEROSPACEAND MILITARY EQUIPMENT1. Board-to-board connection in tactical manpackradio.2. High-stiffness 2 mm-pitch connector foravionics equipment.3. Sealed connector with very high contact pressurefor avionics equipment, electronic defencesystems.123

AUTOMATION ANDINDUSTRIAL EQUIPMENT1. Internal board-to-board connector for electropneumaticactuator.2. SMD connector for industrial sensor.3. Spring-loaded and dead connector for gatecontrol on automatic conveyor system.213TESTING ANDMEASURING EQUIPMENT1. Connector for calibration and testingequipment for field-installed sensors andtransducers.2. Spring-loaded connector with recessedpistons for functional test systems for diskdrives.3. Connector with mixed SMD and throughholeterminations for bare-board test systems.123MEDICAL EQUIPMENT11. Floating-pin spring-loaded connector withintegrated snap-in bracket for motherboardto mezzanine board connection.2. Overmoulded miniature connectors with highdegree of protection IP 67 for patient monitoringsystems.2PROFESSIONALAND CONSUMERELECTRONIC GOODS11. Clamp-on connector to load data from wristwatchtype diving computer into PC.2. Cable-to-cable connector for audio professionalheadset.3. Board-to-board connection for model train.4. Connection in bayonet mating for camerawith interchangeable lenses.5. Double-action connector for modular systemof professional camera.3245