This slide show will help you to understand Wire Wrap Sockets

2. • Solderless wire-wrap terminals are firmly fitted in the insulator body
to withstand torque of wrapping tool.
• A wire-wrap connection is a gas-tight electrical connection
consisting of a helix of continuous, solid, uninsulated wire tightly
wrapped around a pin having sharp edges.
• Extended leads allow for multiple wire wrap connections for
prototyping.
• Sockets are assembled with precision-machined receptacles with
multi-finger contact clip and packaged in high temperature
thermoplastic insulators.

3. • Shell or sleeve is made of brass alloy 360 ½ hard for
strength, conductive, and thermal properties.
• Press-fit assembled inside each shell is a highly reliable,
four-finger beryllium copper contact clip, which scores
the mating device lead, forming a gas-tight electrical
and mechanical connection.
• Multi-finger contact clips are superior to stamped pin
wiping connector blades because they provide multiple
points of contact to the mating pin, resulting in
providing better power and force distribution.
• Two-piece receptacle construction (shell and contact
clip) allows for cost-efficient plating combinations.
• Receptacle shells can be plated with tin for solderability.
• Contact clips can be gold-plated for optimum
conductivity.
CLIP
SHELL OR SLEEVE

4. Plating
Sleeve
Tin Plated
Clip
Normal
Environment
Tin Plated Flash Gold
Harsh
Environment
Gold Plated
0.25 micron
gold thickness
0.75 micron
gold thickness
Note : Both sleeves and clips normally have nickel undercoat to prevent zinc
from migrating to top which can create intermetallic compounds making
sockets difficult to solder.

5. • It is easy to make point to point connections and to repair them.
• Connection are less prone to fail due to vibration and physical
stresses on base board.
• Can make the complex circuit compact.
• Inexpensive because of solderless.
• It is reliable.
• Protects IC’s and other PCB component from damage.

6. • In medical equipment’s
• For aerospace applications
• In consumer electronics
• In automotive industries
• For military applications

7. • Standard DIP Sockets are normally available in following sizes :
Centre Dist. No. of Pins
5.08mm (0.200") 10
7.62mm (0.300") 04 06 08 10 12 14 16 18 20 22 24 28 32
10.16mm (0.400") 08 20 22 24 28 32
15.24mm (0.600") 10 18 24 28 32 36 40 42 48 50 52 64
22.86mm (0.900") 50 52 64

8. • Author Nalin P. Sheth, MBA Harvard, is Managing Director of
Champion Electronics Pvt. Ltd., Pune,411026, India.
• Champion Electronics is serving electronics industry all over the
world from 1975.
• Contact Details :
• Email : sales@champelec.com
• Ph: +91-8928502180.
• Website : www.champelec.com