Datasheet

176 www.lemo.com
®
®
Bronze (UNS C 54400)
0.5 3 1.5
Cu-Be (FS QQ-C-530)
Cu-Be (FS QQ-C-530)
–––
Stainless steel
Electrical contact
Technical description
The secure reliable electromechanical connection achieved
with LEMO female cylindrical contacts is mainly due to
two important design features :
1. Prod proof entry on the mating side which ensures per-
fect concentric mating even with carelessly handled con-
nectors.
2. The pressure spring, with good elasticity, maintains a
constant even force on the male contact when mated. The
leading edge of the pressure spring preserves the sur-
face treatment (gold-plated) and prevents undue wear.
Contact material and treatment
Type
Male crimp
Male print
Surf. treatment (µm)
Material (standard)
Cu Ni Au
1)
Brass (UNS C 34500)
Brass (UNS C 38500) 0.5 3 1.0
Brass (UNS C 38500)
Female crimp
Female print
Clips
Brass –3
3)
–
Connection wire
2)
Au
Ni
Cu
Bronze
or brass
Notes: the standard surface treatment are as follows:
– nickel: FS QQ-N-290A or MIL DTL 32119
– gold: ISO 27874.
1)
minimum value
2)
for elbow print contacts
3)
treatment completed by 6 µm Sn (lead free) tin-plating
Gold thickness
female
outside inside
(µm) (%)
1.0 1.5 65
1.0 1.5 70
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
1.0 1.5 75
–––
Note: P = inspection point
male
(µm)
2.5
2.5
P
P
Contact
ø A
(mm)
0.5
0.7
0.9
1.3
1.6
2.0
3.0
4.0
5.0
6.0
8.0
12.0
1)
Notes:
1)
contacts are silver plated
LEMO female contacts are made of bronze beryllium (QQ-
C-530) or bronze (UNS C 54400). These materials are cho-
sen because of their high modulus of elasticity, their excel-
lent electrical conductivity and a high mechanical strength.
LEMO male solder and print contacts are made of brass (UNS
C 38500). Male crimp contacts are made of brass (UNS
C 34500) or annealed brass (UNS C 38500) with optimum
hardness (HV) for crimping onto the wire.
Thickness comparison between the outside
and the inside of female contacts