IDC
RA
CONNECTOR IDC
• Twin U-slot ID section
The twin U-slot is the most
important IDC element in
JST’s RA connectors. As
shown in the figure, wire
conductors are connected
between the slots of U-shaped
parallel beams, and the
distance between each adjacent
pair of beams is designed to be
one third of the pitch of wire
strands.
2.54mm
pitch
Disconnectable Insulation displacement connectors for 1.27mm pitch ribbon cables
Features ––––––––––––––––––––––––
Beam B
Slot
Beam A
Beam
supporter
Conductor
Double-leaf contact
• Two-die processing and selective gold plating
Two precision dies are used to blank and form the contacts.
After the first die blanks the contacts, they are gold plated at
crucial points. Then, the contacts are formed by the second
To keep pace with the rapid developments in
electronics, internal and external connection
systems are naturally increasing in density. At the
same time, labor requirements and overall costs
must be minimized. RA connectors meet all of
these requirements, while providing increased
reliability. These connectors, whose materials,
shapes, dimensions, and surface treatments have
been carefully selected, are based on the latest
technological information that has been
accumulated and improved over years of
experience in crimping connection technology.
die. This eliminates unnecessary gold-plating and overall
costs are minimized. This innovation is another example of
our industry-leading technology.
• Selective gold-plated posts
Header posts are also selectively gold-plated. While square wire
material is used for production of conventional posts in loose
pieces, continuous flat strip is used for production of our post in
chain form. This allows selective gold-plating and provides cost
reduction.
• Cost-efficient
JST’s unique technology allows it to produce connectors that
are extremely reliable and cost-efficient.
• Interchangeable cables and connectors
RA connectors fit commercially available 1.27mm pitch flat
ribbon cables. A variety of ribbon cables are offered according to
Short locking lever
the purpose. Moreover, the RA series receptacles and header
are interchangeable with the similar type of connectors
commercially available. Contact JST before procuring cables
and other manufacturer’s mating connectors.
Long locking lever
* Compliant with RoHS.
* Refer to "General Instruction and Notice when using
Terminals and Connectors" at the end of this catalog.
* Contact JST for details.
Standards ––––––––––––––––––––––
0
1
1
Recognized E60389
Certified LR20812
RA
CONNECTOR
Receptacle –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Specifications
Characteristics
Current rating
Voltage rating
Temperature range
1.0A AC, DC
300V AC, DC
(including temperature rise in applying electrical current)
-55˚C to +125˚C(gold-plated)
-55˚C to +105˚C(tin-plated)
Initial value/10mΩ max. (gold-plated)
40mΩ max. (tin-plated)
After environmental testing/
15mΩ max. (gold-plated)
50mΩ max. (tin-plated)
5,000MΩ min.
500V AC/5 seconds
AWG #28, 1.27mm pitch ribbon cable
Materials
Contact
Receptacle housing
Cover housing
Strain relief
Phosphor bronze
• Nickel-undercoated, selective gold-plated
• Copper-undercoated, tin-plated (reflow treatment)
Glass-filled PBT, UL94V-0, black
Glass-filled PBT, UL94V-0, black
Glass-filled PBT, UL94V-0, black
Contact resistance
Insulation resistance
Withstanding voltage
Applicable wire
*Contact JST for details.
Applicable cables –––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Ribbon cables conforming to the following specifications can be
used with RA connector receptacles. Contact JST for details.
No.of
conductors (n)
10 to 14
16 to 26
34 to 60
Dimensional tolerance (mm)
P
±0.18
±0.28
±0.38
W
±0.3
±0.3
±0.3
1.27x(N-1)= P
1.27±0.05(pitch)
Insulator
AWG #28 stranded wire
Construction: 7/0.127mm dia.
Material: Tin-plated annealed copper wire
AWG #28 solid wire
Construction: 0.32mm dia.
Material: Tin-plated annealed copper wire
Conductor
1.27xN= W
0.9
Conductor
Insulator
Soft vinyl chloride
Note: N --- Number of circuits
2
RA
CONNECTOR
Model number identification ––––––––––––––––––––––––––––––––––––––––––––––––
• Series name
• Product name: Receptacle
• Number of circuits: 10, 14, 16, 20, 26, 34, 40, 50, 60
• Number of guide ribs:
10 to 40 circuits ... 1
50 circuits ... 0, 1, 2
60 circuits ... 1, 2
• Connection method:
T ... Through type
S ... Short lock through type
• With or without strain relief
0 ... Without
1 ... With
• Contact material:
2 ... Phosphor bronze for spring
• Surface finish
00... Gold-plated (flash)
03... 0.4micron gold-plated
90... Tin-plated (reflow treatment)
02... 0.2micron gold-plated
04... 0.76micron gold-plated
RA
—
S 50 1 T
—
1 2 00
Note:
The standard gold-plated type is identified by the suffix number [-1200], but this
suffix number is usually omitted. The gold-plated type identified by [-0200]
is indicated by [-0] for short. Other types must be identified by the full code
number. Special types do not conform to the above coding system.
Receptacle for long locking lever header
C
Receptacle for short locking lever header
3.4 3.7
7.0
16.0 <Note 2>
10.4 <Note 1>
Polarizing
identification
Polarizing
identification
A
B
Guide rib
Strain relief
Cover housing
Receptacle
housing
2.54
2.54
A
B
Guide rib
4.0
4.0
1.0
6.1
6.1
1.0
<Note 1>: Height without strain relief
<Note 2>: Height with strain relief
Model No.
Dimensions (mm)
Tin-plated
receptacles
(With strain relief)
RA-S101T-1290
RA-S141T-1290
RA-S161T-1290
RA-S201T-1290
RA-S261T-1290
–
RA-S341T-1290
RA-S401T-1290
–
RA-S500T-1290
RA-S501T-1290
RA-S502T-1290
–
RA-S601T-1290
RA-S602T-1290
A
10.16
15.24
17.78
22.86
30.48
40.64
48.26
Cir-
cuits
10
14
16
20
26
34
40
Type of cover
housing
No.of
guide
ribs
1
1
Gold-plated receptacles
With strain relief
RA-S101T
RA-S141T
RA-S161T
RA-S201T
RA-S261T
–
RA-S341T
RA-S401T
–
RA-S500T
RA-S501T
RA-S502T
–
RA-S601T
RA-S602T
Without strain
relief
RA-S101T-0
RA-S141T-0
RA-S161T-0
RA-S201T-0
RA-S261T-0
RA-S341S-0
RA-S341T-0
RA-S401T-0
RA-S502S-0
RA-S500T-0
RA-S501T-0
RA-S502T-0
RA-S602S-0
RA-S601T-0
RA-S602T-0
7.0
3.4
10.4
B
17.30
22.38
24.92
30.00
37.62
47.78
55.40
C
13.00
18.08
20.62
25.70
33.32
Q'ty /
box
300
200
200
150
150
100
100
75
75
Long type
1
1
1
Short type
Long type
Long type
Short type
–
43.48
51.10
1
1
1
0
1
2
–
60.96
68.10
63.80
50
Long type
Short type
–
73.66
80.80
76.50
75
60
1
2
Long type
RoHS compliance
Tin-plated products display (LF)(SN) on a label.
3
RA
Indicate the Model No. shown below when ordering strain relief
and cover separately.
CONNECTOR
Strain relief and cover housing ––––––––––––––––––––––––––––––––––––––––––––––
Strain relief
A
6.1
3.4
Model No.
Cir-
cuits
10
14
Dimensions (mm)
Short type
–
–
–
–
–
RA-CH34S
–
RA-CH50S
RA-CH60S
A
17.30
22.38
24.92
30.00
37.62
47.78
55.40
68.10
80.80
Strain relief
RA-SR10T-1
RA-SR14T-1
RA-SR16T-1
RA-SR20T-3
RA-SR26T-3
RA-SR34T-3
RA-SR40T-3
RA-SR50T-3
RA-SR60T-1
Cover housing
Long type
RA-CH10T
RA-CH14T
RA-CH16T
RA-CH20T
RA-CH26T
RA-CH34T
RA-CH40T
RA-CH50T
RA-CH60T
4.4
JST
16
20
26
34
40
50
60
Cover housing
For long locking lever header
A
6.1
RoHS compliance
Note: 1. Color: Black
Note:
2. When ordering Strain relief or Cover housing only, refer to the above
Note: 2.
Model Nos.
Cover housing
For short locking lever header
A
6.1
7.0
3.4
7.0
3.4
4
RA
CONNECTOR
Shrouded header –––––––––––––––––––––––––––––––––––––––––––––––––––––––––
With long locking lever
With short locking lever
Top entry type
Side entry type
Specifications
Characteristics
Current rating
Voltage rating
Temperature range
Insulation resistance
Withstanding voltage
Applicable PC board
thickness
1.0A AC, DC
300V AC, DC
(including temperature rise in applying electrical current)
-55˚C to+125˚C(gold-plated)
-55˚C to+105˚C(tin-plated)
5,000M
Ω
min.
500V AC/5 seconds
1.6mm
Materials and Finish
Brass
• Nickel-undercoated
Mating part; gold-plated
Solder tail; tin-plated (reflow treatment)
• Copper-undercoated, tin-plated (reflow treatment)
Glass-filled PBT, UL94V-0, black
Post
Housing
Note: Contact JST for details.
5
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