PRECI-DIP SA - Technical Assistance > Contact Technology

GENERAL TECHNICAL SPECIFICATIONS

The contacts are manufactured by high speed turning process with, if necessary, additional secondary machining operation for example for flats, slots or solder cups. The preferred diameter range lies between 1 and 6 mm and contact length up to 40 mm are standard.

MATERIAL

CONTACT BODIES

Brass CuZn36Pb3, C36000
Brass CuZn35Pb2, C34500 for contacts with crimp terminations
Bronze CuSn4Pb4Zn4, C54400 for contacts with compliant press-fit terminations

CLIPS

Beryllium copper alloy C17200

SPRINGS

Stainless steel X12CrNi177 mat. Nr 1.4310, DIN 17224
Music wire mat. Nr 1.1211, DIN 17223

HOODS

Stainless steel AISI 305

All these materials are compliant with RoHS requirements. Lead content of copper alloys is less than 4% in accordance with Exception 6 of the RoHS directive 2002/95/CE.

PLATING

Contact plating is made up of basis underplating acting as diffusion barrier and of finishing layer.

UNDERPLATING

Nickel (Ni) electro-deposited, acc. to SAE-AMS-QQ-N-290
Electroless nickel phosphorus alloy for max. corrosion and wear resistance and for lowest magnetic permeability (plating suffix N)

FINISH

Gold (Au) acc. to ASTM B488, type II C, plating codes 1 (0.25 µm), 3 (0.75 µm), 4 (1.27 µm) and 7 (gold flash)
Tin (pure tin Sn), plating code 8, standard tin plating with excellent solderability, RoHS-compliant
Tin-Lead (SnPb90/10) acc. to ASTM B545, plating code 9. This plating is not RoHS-compliant
Silver (Ag) acc. to ASTM B700, plating code 6

ELECTRICAL AND MECHANICAL CHARACTERISTICS

See individual data pages.

ENVIRONMENTAL CHARACTERISTICS

The contacts withstands following environmental tests without mechanical and electrical defects:

Dry heat steady state IEC 60512-11-9.11i / 60068-2-2.Bb: 125 °C, 16 h
Damp heat cyclic IEC 60512-11-12.11m / 60068-2-30.Db: 25/55 °C, 90 – 100 %rH, 1 cycle of 24 h
Cold steady state IEC 60512-11-10.11j / 60068-2-1.A: -55 °C, 2 h
Thermal shock IEC 60512-11-4.11d / 60068-2-14.Na: -55/125 °C, 5 cycles 30 min
Sinusoidal vibrations IEC 60512-6-4.6d / 60068-2-6.Fc: 10 to 500 Hz, 10 g, 1 octave/min, 10 cycles for each axis
Shock IEC 60512-6-3.6c / 60068-2-27.Ea: 50 g, 11 ms, 3 shocks in three axis

During the above two tests no contact interruption >50 ns does appear.

Solderability J-STD-002A, Test A, 245 °C, 5 s, solder alloy SnAg3.8Cu0.7
Resistance to soldering heat J-STD-020C, 260 °C, 20 s
Resistance to corrosion:

Salt spray test IEC 60068-2-11.Ka: 48 h
Sulfur dioxide (SO2) test IEC 60068-2-42.Kc: 96 h at 25 ppm SO2, 25 °C, 75 %rH
Hydrogen sulfide (H2S) test IEC 60068-2-43.Kd: 96 h at 12 ppm H2S, 25 °C, 75 %rH

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