SMCD Series
Pushwheel Switches, Mini, Front Mount
SMCD Series have large visible readout characters despite it's small
size. This popular family is used in measurement and test
instrumentation for range setting, data programming and count
controlling; and in communications equipment for digital tuning. The
simple, reliable bi-direction pushbutton mechanism permits rapid
changes to either higher or lower numerical settings. Instrument-grade
performance and long service life are enhanced by the heavy gold
wiping contacts. Large readout characters are protected by dust-sealed
windows. Snap-together grouping and snap-in panel mounting
minimize installation time and cost. SMCD models have snap detent
with slight audible click.
SMCD bi-directional code switches may be easily assembled into
groups of any number. The tabs or pins of one decade section press fit
into the holes in the adjacent section. Spacers and end mounting plates
may be included in the same manner as desired.
Groups of SMCD switches with end plates snap into panel holes of the
recommended size and are retained by plastic clips. Again, tools and
additional hardware items are not required.
Model
SMCPK
SMCL
SMCA
SMCADP
B9L
B9LS
B9LS5PIN
B11LS
SP1.2
Description
End mounting plates (pair)
300" spacer section
.100" spacer (with mounting clips)
.100" spacer, decimal point (with mounting clips)
Connector, 9 contacts, solder lug terminals
Connector, 9 contacts, PC pins
Connector, 5 contacts, PC pins
Connectors, 11 contacts, PC pins (for 111)
Limit stop pin for SMD 10 position only
MATERIAL SPECIFICATIONS:
PC Board............................................Glass epoxy type, FR4
PC Terminals ....................................Gold over Ni on Cu
Character Height/Color......................White on black background
SMC .197/.134; SMCD .193/.134
Except 301 & SG558: .140 and
SG557 .120
Molded parts ......................................Noryl-SE1, Black matte finish
Housing ..............................................Black matte finish
TYPICAL PERFORMANCE CHARACTERISTICS:
Contact Rating ......................................0.4 VA @ 20 VDC or Peak AC
Contact Circuit Resistance ....................0.12 Ohm max. (Total internal ckt. res.)
Mechanical Life ....................................More than 106 operations
Operational Force ..................................Approx. 14 oz.
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature......................(-20°C to +80°C)
SMCD - 131 - AK
Codes
111 = Decimal
131 = BCD
137 = BCD Complement
141 = BCD + Complement
301 = Hexadecimal
Connections
AK = pcb short
AL = pcb long
LS = solder pin
ALU = pcb long downward
LS
AK
AL
ALU
.236+.004
(6.0+1.0)
.022
(0.56)
See Code Tables on Page J3
1.89
(48.0)
0.20
(5.08)
HIGH
NUMBERS
.300
(7.62)
.280
(7.11)
8
SMCD .193/.139
EXCEPT 301: .140
1
.945
(24.0)
.866
(22.0)
J
SMCD Series
TOP VIEW
0.30
(7.60) TYP.
0.04
(1.00)
TYP.
0.30 x n + 0.13
(7.6 x n + 3.30)
.232
(5.89)
1.02
(26.0)
1.26
(32.0)
AK TYPES
BOARD TRACE DETAIL
AK TYPES
.098
(2.49)
.039
(.991)
DIA. .059
TYP. (1.50)
.295
(7.49)
.060
(1.52)
1.66
(42.1)
AL & AL/D TYPES
AL TYPES
.098
(2.49)
ALD TYPES
.295
(7.49)
.098
(2.49)
0.06
(1.50)
.039
(0.99)
.059
DIA. TYP. (1.50)
.060
(1.52)
.039 .059
(.0.99) (1.50)
DIA. TYP.
.060
(1.52)
0.04 TO 0.13
(1.00 TO 3.30)
PANEL THICKNESS
RANGE
RECOMMENDED
PANEL HOLE
.886
(22.5)
WHERE n IS THE NUMBER OF SWITCHES
N X .300
+.138
SIDE VIEW
SWITCH SHOWN WITH END MOUNTING PLATE
P/N SMCPK (PAIR)
0.3 x n + 0.24
(7.6 x n + 6.10)
J9
Catalog 1308390
Issued 9-04
www.tycoelectronics.com
Dimensions are in inches
and millimeters unless otherwise
specified. Values in parentheses
or brackets are metric equivalents.
Dimensions are shown for
reference purposes only.
Specifications subject
to change.
USA: 1-800-522-6752
Canada: 1-905-470-4425
Mexico: 01-800-733-8926
C. America: 52-55-5-729-0425
South America: 55-11-3611-1514
Hong Kong: 852-2735-1628
Japan: 81-44-844-8013
UK: 44-141-810-8967
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