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3040 Clayton Street
Phone: 702.851.7600
Email: salesinfo@spacecraft.com
North Las Vegas, NV 89032
Fax: 702.851.7620
Web: www.spacecraft.com
FUNCTIONAL PRINCIPLE
PRECI-DIP spring-loaded con-
tacts consist of a contact body
or barrel, a piston and an heli-
cal compression spring. Electri-
cal contact is established by
the pressure against a fixed, flat
area called the pad connector.
AN EVOLVING LINE
The electrical multipoint con-
nection between the mobile
piston and the cl ip guaran-
tees low, stable electr ical
res i s tance values wi thout
micro-di scont inui t ies, even
when the piston is moving or
in case of vibrations, thus as-
sur ing maximum rel iabi l i ty.
DESCRIPTION AND TECHNICAL SPECIFICATIONS
CHARACTERISTICS
Standard Contacts
Improved-Design Contacts
High Reliabitilty Contacts
Hollow Piston
Design
Slant Piston
Design
Polygonal Piston
Design
Clip Coaxial
Design
Clip In-Line
Design
Environmental
Operating temp, range
- 55°C to + 85°C (music wire) /+ 125°C (stainless steel)
Materials (RoHS-Compliant)
Piston
Gold plated machined brass
Barrel
Gold plated machined brass
Spring
Gold plated music wire / Stainless steel
Clip
Gold plated BeCu C17200
Mechanical
Min. diameter
1.1 mm
1.5 mm
1.8 mm
0.8 mm
Min. initial height
2.5 mm
5 mm
4.5 mm
9 mm
Travel / height ratio
Max. 0.3
Max. 0.2
Max. 0.2
Max. 0.15
Max. travel (stroke)
2 mm
2 mm
1.5 mm
Min. initial spring force
0.2 N
0.2 N
0.2 N
Mechanical life*
100,000 cycles
50,000 cycles
40,000 cycles
Electrical
Contact resistance**
Max. 15 mΩ
Max. 10 mΩ
Max. 20 mΩ
Max. operating current*** 1A cont. / 2A peak
3.5A cont. / 7A peak
2A cont. / 4A peak
*
Tested at nominal stroke with perpendicular pad connector area
**
Static measurement in halfway position of piston travel
***
Above max. current values are for single contacts in free air and for 10°C temperature rise.
Values are indicative and may be affected by contact force, static or dynamic applications, shocks or vibrations
SPRING-LOADED CONTACT TECHNOLOGY
M39029 CONTACTS IN INVENTORY
Part
Number
Desc.
Size Wire
Range
Connector
Specifications
M39029/4-110 Pin
20 20-24
MIL-DTL-26482 Series 2,
AS 81703 Series 3
MIL-DTL-83723 Series III,
MIL-DTL-83733
M39029/4-111 Pin
16 16-20
M39029/4-113 Pin
12 12-14
M39029/5-115 Socket 20 20-24
M39029/5-116 Socket 16 16-20
M39029/5-118 Socket 12 12-14
M39029/31-229 Pin
16 16-20 MIL-DTL-26482 Series 1,
MIL-DTL-26500
M39029/31-240 Pin
20 20-24 MIL-DTL-26482 Series 1
M39029/32-248 Socket 16 16-20 MIL-DTL-26482 Series 1,
MIL-DTL-26500
M39029/32-259 Socket 20 20-24 MIL-DTL-26482 Series 1,
MIL-DTL-26500
Part
Number
Desc.
Size Wire
Range
Connector
Specifications
M39029/56-348 Socket 22D 22-28
MIL-DTL-24308,
MIL-DTL-38999 Series I, III & IV
M39029/56-351 Socket 20 20-24
M39029/56-352 Socket 16 16-20
M39029/56-353 Socket 12 12-14
M39029/57-354 Socket 22D 22-28
MIL-DTL-24308,
MIL-DTL-38999 Series II,
MIL-DTL-55302/71/72/75,
MIL-DTL-83733
M39029/58-360 Pin
22D 22-28 MIL-DTL-24308,
MIL-DTL-38999 Series I, II, III, IV,
MIL-DTL-55302/69,
MIL-DTL-83733
M39029/58-363 Pin
20 20-24
M39029/58-364 Pin
16 16-20
M39029/58-365 Pin
12 12-14
CUSTOM DESIGN CONTACTS
Developing custom solutions from customer
concept to actual product is our specialty!
Our group of engineers are experts in
providing solutions from a cost-effectiveness
and efficiency standpoint. Experienced with
countless standard products and more than
20,000 references underlie the incessant de-
velopment of exceptional quality products.
Contact Spacecraft
to manage your
custom designs!