Data sheet
Connectors
The Interface Partner
SL-SMT 3.5
… reduces costs in the production process
SL-SMT 3.5 is the high temperature resistant
pin header for the 3.5 mm pitch range specially
developed to be compatible with Reflow
production processes. Existing pcb connector
headers cannot withstand the high
temperatures experienced in Reflow soldering -
up to 260 °C. The SL-SMT has been designed
using LCP (Liquid Crystal Polymer) which is
stable at these high temperatures.
In addition, convential assembly of pcb
modules requires both Wave soldering for
standard THT (Through-Hole-Technology)
components like pcb connector headers;
and then Reflow soldering for the SMT
(Surface-Mount-Technology) components.
With the SL-SMT, which uses THR technology,
the Wave solder operation is not needed.
The shorter THR solder pins offer the flexibility
of SMT components but achieve a mechanical
strength of 10x that of “Gull Wing” SMT
components. This additional strength is of great
importance for pcb connectors where
connection operations put strain onto standard
SMT solder joints.
The SL-SMT is not only suitable for the latest
soldering techniques, it has also been designed
to be compatible with standard automatic
“Pick-and-Place” machines. “Tape-on-Reel”
and “Tray” packaging enable fully automatic
component placement of the 90° (horizontal)
and 180° (vertical) pin headers. These products
are available in the standard open-ended,
closed-ended and flanged versions, and mate
with any of the female socket connectors in
our BL 3.5 range.
Advantages:
up to 30% reduction in the number of
production steps required
stable at 260 °C - compatible for
Convection and Vapour-phase Reflow
soldering
compatible for automatic “Pick-and-Place”
THR gives 10x greater strength than
“Gull Wing” SMT
placement on both sides of pcb possible
USA
Weidmüller Inc.
821 Southlake Boulevard
Richmond, VA. 23236
Tel. (804) 794-2877 Fax (804) 794-0252
Great Britain
Weidmüller Ltd.
1 Abbey Wood Road, Kingshill, West Malling
Kent ME 19 4YT
Tel. (17 95) 58 09 99 Fax (17 32) 87 42 96
Other countries
Weidmüller Interface GmbH & Co.
Postfach 30 30
D-32720 Detmold
Tel. (0 52 31) 14-0 Fax (05 23 1) 14-20 83
SL-SMT 3.5 pin headers
At the pcb level, the SL-SMT 3.5 pin header ensures a cost saving in the production
process and, for field wiring, offers a free choice of connection technology thanks to an
extensive range in 3.5 mm pitch.
Packaging types of the SL SMT 3.5
The packaging of the SL SMT 3.5 was conceived for the typical component placement
process used for SMT components:
Automatic component placement:
Tape-on-Reel (ToR)
Tray
Manual component placement:
Standard box (Std)
The high temperature resistant SL SMT 3.5 pin header can also be used in the wave
soldering process, the advantage being that the plastic is resistant to high temperatures.
For this application however, standard pin lengths are needed. These are available on
request.
Technical data
Materials
Insulation material
Colour
Fusion temperature
Flammability class.
Basis contact material
Contact plating
1)
Characteristic system values
Pitch
Connection method
Processing method
Soldering pin length
2)
PCB hole diameter
3)
Insulation resistance
Through resistance
Operating temperature range with BL 3.5
VDE 0110 4.97 rated data
Rated current
4)
Overvoltage category/Pollution severity
Rated voltage
Impulse voltage
UL rated data
Rated voltage, industrial
Rated current
CSA rated data
Rated voltage, industrial
Rated current
LCP, halogen-free
black
335
V0
CuSn
tin-plated
Derating curves
°C
UL 94
mm
mm
ømm
MΩ
mΩ
°C
3.50
Through-Hole-Reflow
convection and vapour phase soldering
1.5
1.4
+0.1
≥
10
6
≤
4.2
-20…+100
BL 3.5/SL-SMT 3.5/90°, 2 and 24 poles
Conductor H05V-K0.5mm
2
A
V
kV
13
III/3
125
2.5
III/2
125
2.5
II/2
250
2.5
V~
A
300
10
V~
A
300
10
Application notes
BL 3.5/SL-SMT 3.5/90°, 2 and 24 poles
Conductor H07V-K1.5mm
2
1)
2)
3)
4)
gold-plated contacts available on request
additional soldering pin lengths on request
pls. see chapter “design recommendation”
referred to 20 °C ambient temperature, rated cross-section
and max. poles in connection with BL 3.5
For the mounting of PCBs it should be noted, that the rated
data given in the data sheet relate only to the connection
elements. The necessary creepage and clearance paths must
be observed in connection with the respective applicant in
accordance to VDE 0110. The current-carrying capacity is to be
determined according to DIN IEC 326 part 3.
Weidmüller connectors are tested according to the DIN 0627
standard, and are valid for its field of applications. Provided that
the connectors are used for the intended purpose, all
requirements with respect to the occuring of electrical,
mechanical, thermic and corrosive stress will be satisfied.
BL 3.5/SL-SMT 3.5, 24 poles
(conductor bridges over the reflow soldering point)
Conductor H07V-K1.5mm
2
2
Machine oriented packaging
“Tape-on-Reel”
Reel dimensions and position of pin headers
Feed direction
even pole numbers
uneven pole numbers
pin header is reversed
The pin headers for the 90° and 180°
versions of the SL-SMT 3.5 are available
in “Tape-on-Reel” for automatic
component replacement.
The reels are anti-static, have a diameter
of 330 mm, and are designed for all
commercially available feeders.
The tapes used conform to the standard
IEC 60286-3 and are made of anti-static,
black polystyrene. The tape is covered
with a transparent plastic film.
A high temperature resistant pick-and-
place pad is located in the middle of the
pin header for automatic gripping of the
straight pin header SL-SMT 3.5/180°.
This pick-and-place pad is included in the
“Tape-on-Reel” packaging.
The angled SL-SMT 3.5/90° pin header is
positioned so that no pick-and-place pad
is needed for automatic gripping.
Feed direction
even pole numbers
uneven pole numbers
pin header is reversed
Unit packaging “Tape-on-Reel”
Quantity of SL-SMT 3.5 on the reel
open and closed versions
Tape width 56 mm
Reel diameter 330 mm
Poles
2…11
SL-SMT 3.5/90
250 pcs.
SL-SMT 3.5/180
200 pcs.
Unit packaging “Tape-on-Reel”
Quantity of SL-SMT 3.5 on the reel
flanged version
Tape width 56 mm
Reel diameter 330 mm
Poles
2…9
SL-SMT 3.5/90
250 pcs.
SL-SMT 3.5/180
200 pcs.
In tape, the open and closed versions of the SL-SMT 3.5 are
currently only available up to 11 poles. Additional tape widths
on request.
In tape, the flanged version of the SL-SMT 3.5 is currently only
available up to 9 poles. Additional tape widths on request.
3
Machine oriented packaging
“Tray”
Tray dimensions and position of SL-SMT 3.5 pin headers
The optimum positioning points for the vacuum pipette depend on the length of the
connectors (open, closed or flange). In the tray drawing, we have marked these points
with Start X and Step X for the X axis with reference to the example of an
SL-SMT 3.5/24/90 without a flange. The following table indicates the dimensions for the
X and Y axes for the different pole numbers and versions.
To facilitate adjustment on the machine, the label shows the necessary dimension in
short form.
Example of Label
Cat. No.
176179 3001
28.35 / 17.50 / 15.0 -19.25 / 20.0 / 5
Number Step Y
Step Y in mm
Start Y in mm
Number Step X
Step X in mm
Start X in mm
The trays are adapted to the SL-SMT 3.5
pin headers and are based on the
standard EN 60286-5. The tray material
consists of black anti-static polystyrene.
For transport, the trays are covered with
a transparent cover.
A high temperature resistant pick-and-
place pad is placed in the middle of the pin
header for automatic gripping of the
straight pin header SL-SMT 3.5/180° using
a vacuum pipette.
This pad in included in the tray packaging.
The angled pin header SL-SMT 3.5/90°
was conceived to ensure that no pick-
and-place pad is needed for automatic
gripping.
Tray dimensions SL-SMT 3.5/90° and 180°
open and closed versions
X-values 90°/180°
No. Poles
-
-
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Y-values 90°
Start Y (mm)
19.25
Step Y (mm)
20.00
Number Step Y
5
Start X (mm)
-
-
28.35
30.10
31.85
33.60
35.35
37.10
38.85
40.60
42,35
44.10
45.85
47.60
49.35
51.10
52.85
54.60
56.35
58.10
59.85
61.60
63.35
Step X (mm)
-
-
17.50
21.00
24.50
28.00
31.50
35.00
38.50
42.00
45.50
49.00
52.50
56.00
59.50
63.00
66.50
70.00
73.50
77.00
80.50
84.00
87.50
Number Step X
-
-
15
13
11
9
8
7
6
6
5
5
4
4
3
3
3
3
3
2
2
2
2
Tray dimensions SL-SMT 3.5/90° and 180°
flange versions
X-values 90°/180°
No. Poles
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Start X (mm)
28.35
30.10
31.85
33.60
35.35
37.10
38.85
40.60
42.35
44.10
45.85
47.60
49.35
51.10
52.85
54.60
56.35
58.10
59.85
61.60
63.35
65.10
66.85
Step X (mm)
17.50
21.00
24.50
28.00
31.50
35.00
38.50
42.00
45.50
49.00
52.50
56.00
59.50
63.00
66.50
70.00
73.50
77.00
80.50
84.00
87.50
91.00
94.50
Number Step X
15
13
11
9
8
7
6
6
5
5
4
4
3
3
3
3
3
2
2
2
2
2
2
Y-values 180°
Start Y (mm)
17.95
Step Y(mm)
20.00
Number Step Y
5
Unit packaging “Tray”
SL-SMT 3.5/90° and 180°
open and closed versions
No. Poles
2…3
4
5
6
7
8
9
10…11
12…13
14…15
16…20
21…24
on request
96 pcs.
84 pcs.
72 pcs.
60 pcs.
54 pcs.
48 pcs.
42 pcs.
36 pcs.
30 pcs.
24 pcs.
18 pcs.
Tray content
Unit packaging “Tray”
SL-SMT 3.5/90° and 180°
flange version
No. Poles
2
3
4
5
6
7
8…9
10…11
12…13
14…18
19…24
96 pcs.
84 pcs.
72 pcs.
60 pcs.
54 pcs.
48 pcs.
42 pcs.
36 pcs.
30 pcs.
24 pcs.
18 pcs.
Tray content
4
Machine oriented packaging
“Tray”
Tray dimensions and position of pin headers SL-SMT 3.5/90°
even pole numbers
uneven pole numbers
even pole numbers
uneven pole numbers
User preparation of the SL-SMT 3.5 in the “Tray”
For user preparation of the SL-SMT 3.5 in the “Tray”, we also offer all components separately.
Tray empty
Type
Tray SL-SMT 3.5/90
Tray SL-SMT 3.5/180
Tray-Deckel SL-SMT 3.5
PPP-SL-SMT 3.5/180
Description
for SL-SMT 3.5/4…24/90, SL-SMT 3.5/4…24/90G and SL-SMT 3.5/2…24/90F
for SL-SMT 3.5/4…24/180 , SL-SMT 3.5/4…24/180G and SL-SMT 3.5/2…24/180F
for Trays SL-SMT 3.5/…/90 and SL-SMT 3.5/…/180 (open, closed, flange) - for covering and stacking the trays
pick-and-place-pad for SL-SMT 3.5/2…24/180 (open, closed, flange)
Cat. No.
177210 0000
177215 0000
177216 0000
176224 0000
Qty.
1
1
1
500
SL-SMT 3.5 pin headers
Poles
2…4
5…16
17…24
Type
SL-SMT 3.5/90 (open, closed, flange) and SL-SMT 3.5/180 (open, closed, flange)
SL-SMT 3.5/90 (open, closed, flange) and SL-SMT 3.5/180 (open, closed, flange)
SL-SMT 3.5/90 (open, closed, flange) and SL-SMT 3.5/180 (open, closed, flange)
Order-No.
see page 6+7
see page 6+7
see page 6+7
Qty.
100
50
20
5
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