Datasheet

57www.lemo.com
®
®
2.5
A
2.5
A
ø 0.7
ø 0.6
ø 0.6
Crimp Contacts
The square form crimp method is used (MIL-C-22520F,
type 2) (photo 1).
The crimp method requires a controlled compression to
obtain a symmetrical deformation of the conductor
strand and of the contact material. The radial hole in the
side of the contact enables correct positioning of the
conductor within the contact to be verified. A good
crimping is characterized by a small conductor section
reduction and by the quite closed free spaces.
The LEMO crimp contacts are factory annealed to relieve
internal stresses, and reduce the risk of the material
work hardening during the crimping process.
During this process, an induction heating machine
designed by LEMO’s Research and Development
Department is used (photo 2).
Features of the LEMO crimp contacts:
– Quick and simple assembly
– Insulator is not heated during contact
to conductor assembly
– High temperature applications possible
– Increased conductor retention force
Print contacts
Print contacts are available in certain connectors versions,
mostly for the straight or elbow sockets models. Connec-
tion is made on flexible or rigid printed circuits by sol-
dering
Solder Contacts
The conductor bucket of these contacts is machined at
an angle to form a cup into which the solder can flow.
Design is compatible with the use of lead-free solder.
ø 0.7
ø 0.7 ø 0.7
Type
Male solder
Male crimp
Male print
Surface treatment (µm)
Material (Standard)
Cu Ni Au
1)
Brass (UNS C 38500)
Brass (UNS C 34500) 0.5 3 1.0
Brass (UNS C 38500)
Female solder
Female crimp
Female print
Bronze
(UNS C 54400)
0.5 3 1.5
Materials and Treatments
Au
Ni
Cu
Bronze
Notes: the standard surface treatments are as follows:
– Nickel SAE AMS QQ N 290 or MIL DTL 32119
– Gold ISO 27874
Contact Resistance in Relation to Numbers of Mating
Cycles (mesured according to IEC 605/2-2 test 2a)
1)
minimum value
5.6 5.7 6.1
Contact resistance (mΩ)
1000 3000 5000
cycles cycles cycles
ø 0.7
12
Gold thickness
female
outside inside
(µm) (%)
1.0 1.5 70
A = inspection point
Thickness comparison between the outside
and the inside of female contacts
male
(µm)
Maximum values mesured after the
mating cycles and the salt spray
test according to IEC 60512-6 test
11f.