C&K Connector Specification CS FR022, amendment to the ESCC Generic Specification n° 3401, for low cost products manufactured :
- in the same ESA qualified site
- through the same manufacturing and control processes
- with the same piece parts
- with lighter controls, documentation and traceability
Applications : Engineering models, ground equipments, testing, some flight equipments (no need for high requirements).
The connectors and accessories, supplied according to these 2 quality levels, are totally compatible, interchangeable, and intermateable, as they are
manufactured with the same piece parts (except the cables), in the same ESA qualified site.
Connector Styles
Description of the 3 Connector Styles proposed for the Space applications (Combinations of Configurations and Quality Levels).
Connector Style
Space ESA
Space FR022
Standard FR022
Configuration
ESA
ESA
Standard
Quality Level
ESA
FR022
FR022
Configuration characteristics.
Accessories
Cavity filled with epoxy
Guide Posts
Polarization key
Latching (even number of cavities)
Latching (odd number of cavities)
Configuration ESA
1 & N (mandatory)
2 & N-1 (mandatory)
3 to N-2 (option)
N/2 (option)
N/2 – 1 (option)
Configuration Standard
N.A.
1 & N (option)
1 to N (option)
N/2 (option)
N/2 – 1 (option)
Dimensions are shown in mm (inch)
Dimensions subject to change
137
Microminiature Connectors Type MTB1 Space
Performance Specifications
Operating Temperature range
Storage Temperature range
Working Voltage
(between contacts and contact and shell)
Rated Current
Insulation Resistance (500 V DC)
Voltage Proof
Contact Retention in insert
Engagement / Separation Forces
(Male Contacts)
-55°C / +125°C (-67°F / +257°F)
-55°C / +125°C (-67°F / +257°F)
Sea level
150 Vrms
33000 m (108240 feet) altitude
100 Vrms
AWG 26 Wire
2,5 A max.
AWG 28 Wire
1,5 A max.
Solid uninsulated Wire
2,5 A max.
5000 M
min.
600 Vrms / 2.0 mA max. leakage current
22,25 N max. / No contact axial displacement allowed
Gauge Fixture
Max.
Min.
Separation Force (N min.)
Inner diameter
min. / max.
0,559 (.0220) / 0,564 (.0222)
0,582 (.0229) / 0,587 (.0231)
0,137
Engagement Force (N max.)
1,667
Mating / Unmating Forces (per contact)
Mechanical Endurance
Contact Resistance
Mating : 2.2 N max.
Unmating : 0.14 N min. / 2.2 N max.
500 cycles mating/unmating
Low level current (10 mA / 20 mV DC) : 6.0 m
Rated current : 5.0 m max.
Nb of Contacts per Connector
2 to 4
5 to 14
15 and over
max.
AWG 26 Wire
2,0 A max.
1,8 A max.
1,4 A max.
AWG 28 Wire
1,4 A max.
1,2 A max.
0,9 A max.
Maximum Rated Current
Solid uninsulated Wire
2,0 A max.
1,8 A max.
1,4 A max.
Maximum Weight
Male Contact
Female contact
Plug Insulator
Receptacle Insulator
Guide Posts (pair)
Latching Plug part
Latching Receptacle part
Solid Uninsulated Wire
Insulated Cable AWG26 (ESCC 390101302B)
Insulated Cable AWG28 (ESCC 390101301B)
20000 Gamma max. (NM)
0.020 g
0.020 g
0.021 g / cavity
0.006 g / cavity
0.035 g
0.030 g
0.040 g
1.60 g / m
2.30 g / m
1.80 g / m
Residual Magnetism Level
Dimensions are shown in mm (inch)
Dimensions subject to change
138
Microminiature Connectors Type MTB1 Space
Contact Design
Welded tip
Sleeve
Wire
Crimp area
Wire crimp
The high-performance and reliable contact characteristics are obtained by the Micropin
TM
contact system.
The flexible "twist-pin" spring contact consists of 7 strands of 0,127 (.005) diameter beryllium copper wire helically wound around a core of 3 strands
0,09 (.0035) diameter soft copper wire.
This wire bundle is crimped into a sleeve at one end. The other end is terminated with a hemispherically shaped weld.
The wire bundle is compressed to create a bulge with a diameter slightly larger than the socket inside diameter.
The pin elongates and twists when it enters the socket. Electrical contact is maintained along 7 spiral lines.
The socket is a precision-made tube with a chamfered lead-in.
Normal mating conditions
Severe misalignment
Twist-pin contacts will mate even under severe misalignment.
The flexible twist-pin is recessed into the insulator and the rigid socket is exposed, reversing the traditional positions of pin and socket.
During mating, the socket is guided into the pin insulator by the lead-in chamfer.
The pin is kept from flexing beyond the socket capture radius by the walls of the cavity.
The hemispherical weld of controlled radius at the tip of the pin combines with the lead-in chamfers of the socket contact and the pin insulator to
cam the pin into alignment.
By controlling the welding process and the dimensions of the socket contact and the insulators, it is impossible for the recessed pin to escape the
socket capture radius.
Dimensions are shown in mm (inch)
Dimensions subject to change
139
Microminiature Connectors Type MTB1 Space
Terminations
Harness type insulated cables : AWG 26 to AWG 28, 7 strand, single-core cables.
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