SMCD Series
J9
Catalog 1308390 Dimensions are in inches Dimensions are shown for USA: 1-800-522-6752 South America: 55-11-3611-1514
Issued 9-04 and millimeters unless otherwise reference purposes only. Canada: 1-905-470-4425 Hong Kong: 852-2735-1628
specified. Values in parentheses
Specifications subject
Mexico: 01-800-733-8926 Japan: 81-44-844-8013
www.tycoelectronics.com or brackets are metric equivalents. to change. C. America: 52-55-5-729-0425 UK: 44-141-810-8967
J
SMCD Series
Pushwheel Switches, Mini, Front Mount
TYPICAL PERFORMANCE CHARACTERISTICS:
Con
tact Rating
......................................0.4 VA @ 20 VDC or Peak AC
Contact Circuit Resistance ....................0.12 Ohm max. (Total internal ckt. res.)
Mechanical Life ....................................More than 10
6
operations
Operational Force..................................Approx. 14 oz.
ENVIRONMENT
AL SPECIFICATIONS
Operating Temperature......................(-20°C to +80°C)
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
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.
1
SMCD .193/.139
EXCEPT 301: .140
0.20
(5.08)
HIGH
NUMBERS
.300
(7.62)
.280
(7.11)
.945
(24.0)
.232
(5.89)
1.89
(48.0)
.866
(22.0)
8
1.02
(26.0)
1.26
(32.0)
AK TYPES
1.66
(42.1)
AL & AL/D TYPES
BOARD TRACE DETAIL
AK TYPES
.098
(2.49)
.039
(.991)
DIA.
TYP.
.059
(1.50)
.060
(1.52)
AL TYPES
.295
(7.49)
.295
(7.49)
.098
(2.49)
.039
(0.99)
DIA. TYP.
.059
(1.50) .060
(1.52)
ALD TYPES
.098
(2.49)
.039
(.0.99)
DIA. TYP.
.059
(1.50)
.060
(1.52)
.886
(22.5)
N X .300
+.138
WHERE n IS THE NUMBER OF SWITCHES
SIDE VIEW
SWITCH SHOWN WITH END MOUNTING PLATE
P/N SMCPK (PAIR)
TOP VIEW
0.30 x n + 0.13
(7.6 x n + 3.30)
0.30
(7.60) TYP.
0.04
(1.00)
TYP.
0.06
(1.50)
0.04 TO 0.13
(1.00 TO 3.30)
PANEL THICKNESS
RANGE
0.3 x n + 0.24
(7.6 x n + 6.10)
RECOMMENDED
PANEL HOLE
Model Description
SMCPK
End mounting plates (pair)
SMCL 300" spacer section
SMCA .100" spacer (with mounting clips)
SMCADP .100" spacer, decimal point (with mounting clips)
B9L Connector, 9 contacts, solder lug terminals
B9LS Connector, 9 contacts, PC pins
B9LS5PIN Connector, 5 contacts, PC pins
B11LS Connectors, 11 contacts, PC pins (for 111)
SP1.2 Limit stop pin for SMD 10 position only
See Code Tables on Page J3
SMCD - 131 - AK
Codes Connections
111 = Decimal AK = pcb short
131 = BCD AL = pcb long
137 = BCD Complement LS = solder pin
141 = BCD + Complement ALU = pcb long downward
301 = Hexadecimal
.236+.004
(6.0+1.0)
.022
(0.56)
AK AL ALU
LS
