IDC
RA
CONNECTOR IDC
• Twin U-slot
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
(.100") pitch
Disconnectable Insulation displacement connectors for 1.27mm (.050") 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
Short locking lever
RA connectors fit commercially available 1.27mm (.050") pitch
flat ribbon cables. A variety of ribbon cables are offered
according to 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
Standards –––––––––––––––––––––
342
0
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)
5,000M min.
500V AC/5 seconds
AWG #28, 1.27mm(.050") pitch ribbon cable
Materials
Contact
Receptacle housing
Cover housing
Strain relief
Phosphor bronze
• Nickel-undercoated, gold-plated
• Copper-undercoated, tin/lead-plated
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 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(in.)
P
±
0.18(
±
.007)
±
0.28(
±
.011)
±
0.38(
±
.015)
W
±
0.3(
±
.012)
±
0.3(
±
.012)
±
0.3(
±
.012)
1.27
±
0.05 pitch
(.050
±
.002)
1.27(.050)X(n-1)= P
Insulator
Conductor
0.9(.035)
Conductor
1.27(.050) X n= W
AWG #28 stranded wire
Construction: 7/0.127mm (.005")dia
Material: Tin-plated annealed copper wire
AWG #28 solid wire
Construction:0.32mm (.013")dia.
Material: Tin-plated annealed copper wire
Insulator
Soft vinyl chloride
343
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)
02... 0.2micron(8micro-inch) gold-plated
03... 0.4micron(16micro-inch) gold-plated 04... 0.76micron(30micro-inch) gold-plated
90... Tin/lead-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(.276) (.134) (.146)
16.0(.630) Note 2
Note 1 10.4(.409)
Polarizing
identification
Polarizing
identification
A
B
Guide rib
Strain relief
Cover housing
2.54(.100)
4.0(.157)
A
B
Guide rib
4.0(.157)
Receptacle
housing
2.54(.100)
1.0(.039)
6.1(.240)
1.0(.039)
6.1(.240)
Note 1: Height without strain relief
Note 2: Height with strain relief
Model No.
Dimensions mm(in.)
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
73.66(2.900)
80.80(3.181)
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
3.4
7.0(.276) (.133)
10.4(.409)
A
10.16( .400)
15.24( .600)
17.78( .700)
22.86( .900)
30.48(1.200)
40.64(1.600)
48.26(1.900)
B
17.30( .681)
22.38( .881)
24.92( .981)
30.00(1.181)
37.62(1.481)
47.78(1.881)
C
13.00( .512)
18.08( .712)
20.62( .812)
25.70(1.012)
33.32(1.312)
Q'ty /
box
300
200
200
150
150
100
Long type
1
1
1
Short type
Long type
Long type
Short type
–
43.48(1.712)
55.40(2.181)
51.10(2.012)
100
75
1
1
1
0
–
60.96(2.400)
68.10(2.681)
63.80(2.512)
50
Long type
1
2
75
Short type
60
Long type
2
1
–
76.50(3.012)
75
344
RA
Strain relief and cover housing
Indicate the Model No. shown below when ordering strain relief
and cover separately.
CONNECTOR
Strain relief
A
4.4(.173)
Model No.
6.1(.240)
3.4(.134)
Dimensions mm(in.)
Short type
–
–
–
–
–
RA-CH34S
–
RA-CH50S
RA-CH60S
A
17.30( .681)
22.38( .881)
24.92( .981)
30.00(1.181)
37.62(1.481)
47.78(1.881)
55.40(2.181)
68.10(2.681)
80.80(3.181)
Cir-
cuits
10
14
16
20
26
34
40
50
60
Strain relief
RA-SR10T-1
RA-SR14T-3
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
JST
Cover housing
For long locking lever header
A
3.4(.134)
6.1(.240)
Cover housing
For short locking lever header
A
3.4(.134)
6.1(.240)
7.0(.276)
7.0(.276)
345
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(.063")
Materials and Finish
Brass
• Nickel-undercoated
Mating section: Gold-plated
Solder tail: Tin/lead-plated
• Copper-undercoated, tin/lead-plated
Glass-filled PBT, UL94V-0, black
Post
Housing
Note: Contact JST for details.
346
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