Preci-Dip Durtal SA - PRECI-DIP SA

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PRECI-DIP DURTAL SA · 2800 DELEMONT · SWITZERLAND
PRESS- FIT TECHNOLOGY
A cost effective alternative to soldering connectors to a board

COMPLIANT PRESS-FIT TECHNOLOGY
BASIC TECHNOLOGY
Press-fit technology, which has been
around for some 20 years now, is a
solderless connection method. It consists
of force fitting an oversized contact
pin into the plated through hole
of a printed circuit board (PCB). The
high radial pressure produces a deformation,
resulting in a gas-tight electrical
connection of high quality.
This difference in pin cross section
and hole diameter results in a deformation
of either the PCB hole or the
cross section of the pin during the
insertion process of pin into PCB
hole. There are two major types of
press-fit sections:
COMPLIANT PRESS-FIT TECHNOLOGY BY PRECI-DIP
We have been producing contacts, sockets and connectors with press-fit terminations for
over ten years.
The specific design of our compliant pin is based on a «modified eye of a needle» principle
with particular attention paid to geometry, elasticity characteristics, and surface finish. Its
main features are:
- Elastic deformation over the total range of the hole tolerance;
- High retention force, in spite of the low insertion force (much below generally admitted
maximum values);
- Gas-tight contact zone without any damage (chipping) to hole metallisation;
- Low, constant electrical contact resistance;
- Complies with IEC60352-5 standard.
They are available for plated hole diameters of 0.6, 0.7, 0.9 and 1.0 mm, according to IEC
standards. They are compatible with PCB finishes in tin, copper, or gold on nickel.
A solid pin which does not deform
in the insertion process (Fig.A):
- With square or hexagonal cross
section and point-to-point dimension
of the polygon greater than
PCB finished hole diameter;
- The deformation takes place on
the PCB side.
A compliant pin which compresses
as a result of insertion into the PCB
through hole (Fig.B):
- With radial elasticity in the contact
zone;
- The deformation takes place on
the contact side.
Preci-Dip compliant press-fit pin based on
a «modified eye of a needle» principle.
Micrograph cross section of inserted compliant
pin.
COMPLIANT PRESS-FIT TECHNOLOGY WITH CONNECTING PIN
For applications requiring connections on both sides of the PCB, the press-fit termination
is extended in the form of an additional contact pin which mates with the female contact
of another PCB. This type of contact also has the modified eye of a needle to give superior
quality of the press-fit connection.
It is presently only available for 1 mm diameter PCB holes.
Fig.A: Cross-section
solid pin
Fig.B: Cross-section
compliant pin
Over the years, the compliant pin
technology for press-fit insertion
gained general recognition over the
solid pin.
Solid press-fit pin
Compliant press-fit with connecting pin

TECHNICAL SPECIFICATIONS
ADVANTAGES OF PRESS-FIT
OVER SOLDER-BASED TECHNOLOGY
The basic advantages of press-fit
technology are obvious, in particular
when it comes to adding contacts
or connectors to a soldered SMD
board:
- Efficient, reliable and quick assembly
of connectors, without any
mounting accessories (screws,
brackets, etc.);
- No soldering problems (such as
thermal load on PCB and components,
degassing, hole filling on
multilayer, bridging, cold soldering
joints...);
- No residues on PCB and connector
contact area, affecting reliability;
- Complete reparability. Connectors
can be easily exchanged.
Press-fit connections are easily added
to an SMD board after reflow soldering
of the components, as the
hole metallisation is not affected by
this process.
Technical specification
Operating temperature range: -55 to +125 °C
Pin material:
Bronze CuSn4Pb4Zn4 (C54400)
Pin plating:
Tin over Nickel
Press-fit characteristic measured acc. to IEC 60352-5 (single pin):
Press-in force : 90 N max. (at min. hole diameter) / 65 N typ
Push-out force : 30 N min. (at max. hole diameter) / 50 N typ.
Push-out 3rd cycle : 20 N min. (at max. hole diameter)
PCB hole specifications: Dimensions
Nominal hole diameter Diameter finished hole Diameter drilled hole
0.6 mm 0.6 +/- 0.05 mm 0.7 +/- 0.02 mm
0.7 mm 0.7 +0.07 / -0.05 mm 0.8 +0.03 /- 0.02 mm
0.9 mm 0.9 +0.07 / -0.05 mm 1.0 +/- 0.02 mm
1.0 mm 1.0 +0.09 / -0.06 mm 1.15 +/- 0.025 mm
PCB hole specifications: Plating
PCB surface finish Tin Copper Gold over nickel
Thickness - copper min. 25 µm min. 25 µm min. 25 µm
Thickness - tin 5 - 15 µm – -
Thickness - nickel – – 2.5 - 5 µm
Thickness - gold – – 0.05 - 0.2 µm
… FROM OUR CATALOGUE
Socket and pin contacts with compliant press-fit terminations are currently available in our
catalogue as single contacts and for a multitude of sockets and connectors, in standard or
customised versions, such as:
ASSEMBLY WITH
THE PRINTED CIRCUIT BOARD
Assembly of press-fit connectors and
sockets with the PCB requires only
simple tooling which can be installed
on a small press: a base plate with
holes corresponding to the hole pattern
of the PCB and an upper tool
(flat rock or with slots to allow for
the contact pins in the case of male
contacts).
DIL sockets : Pitch 2.54 mm (Series 146)
PGA sockets : Interstitial or 2.54 mm grid (Series 546)
PCB connectors :
- Sockets : Pitch 2 mm , standard or with polarization (Series 831-833)
Pitch 2.54 mm with mating pin ø 0.47 mm (Series 346/356 and 801/803)
Pitch 2.54 mm with mating pin ø 0.76 mm (Series 801/803)
- Pins : Pitch 2.54 mm, connecting pin ø 0.47 mm (Series 356/456 )
Pitch 2.54, connecting pin ø 0.76 mm, standard or shrouded version
(Series 800/802/804)
You will find all the complementary technical specifications related to the above products in
our catalog.
More sophisticated equipment (semiautomatic
or automatic for volume
production) is also available on the
market.
Press-fit termination are available for a multitude of sockets and connectors.

SWISS QUALITY IS NOT A LEGEND
Let us prove it !
A MANUFACTURER
CAPABLE OF RESPONDING
TO SPECIFIC REQUESTS
Many years of experience
PRECI-DIP DURTAL SA, established
1976 in Delémont, capital of the
Swiss Jura, has long experience in
manufacturing screw-machined high
precision contacts.
Today we are one of the world leaders
in manufacturing contacts and
connectors. We offer a broad line of
reliable, high quality interconnect
components, or customised contacts
available in loose conditions or assembled
with insulator bodies.
Take advantage of our experience in
studying and quoting solutions
according to your specific requirements.
You will be pleasantly surprised
by the rapidity of our response.
Customer safety
We fully guarantee the reliability and
the irreproachable performance of our
products. To this end, we have chosen
a challenging, but efficient way:
under the surveillance of a vigilant
quality assurance department (ISO
9001: 2000 and ISO 14001), we handle
in our own manufacturing plant:
Delémont
(Switzerland)
Layout: Publicité Rutz | www.pub-rutz.ch
- The screw-machining of all parts
including possible secondary operations;
- The stamping and forming of the
clips;
- All the electroplating processes and
surface treatments;
- The production of our range of MIL
contacts, including colour code marking,
in our own production unit,
also certified to MIL-STD 790;
- The production of the miniature
helical springs with precisely defined
characteristics used on our spring
loaded contacts;
- The injection of the insulator bodies
in materials adapted to their
application;
- All the assembling operations, executed
on automatic equipment of
our own design.
In our Delémont manufacturing unit with a surface of
193.500 sq.ft. (certified ISO 9001:2000; MIL-STD-790 and
ISO 14001) we produce all the components required for
making highly reliable contacts and connectors.
Once screw-machined, the press-fit details are then produced
on the home designed multi-station rotary type
machines.
Our high speed screw machines produce up to 130 million
precision parts per week. With this volume, PRECI-DIP
is one of the world leaders in high precision machined contacts.
After machining and plating, the contacts are either shipped
in bulk or assembled into sockets and connectors.
Fully integrated production...
Flexibility, rapidity, know-how
Mastering the entire product by an
integrated production tool is one of
the best trump cards one can have.
Most of our special machinery is designed
by our own engineering department.
We are therefore totally independent
from any sub-contractors.
Consequently, we will be able to
respond to all your enquiries with
economically priced solutions, equally
for small or high volume batches.
info and products online : www.precidip.com
CONNECT US !
PRECI-DIP Durtal SA
Rue Saint-Maurice 34, P.O.Box 341
CH-2800 Delémont / Switzerland
Phone: +41 (0)32 421 04 00
Fax: +41 (0)32 421 04 01
E-mail: sales@precidip.com
Your PRECI-DIP dealer: