SMCD Series Pushwheel Switches, Mini, Front Mount SMCD Series have large visible readout characters despite it's small MATERIAL SPECIFICATIONS: size. This popular family is used in measurement and test PC Board............................................Glass epoxy type, FR4 instrumentation for range setting, data programming and count PC Terminals ....................................Gold over Ni on Cu controlling; and in communications equipment for digital tuning. The Character Height/Color......................White on black background simple, reliable bi-direction pushbutton mechanism permits rapid SMC .197/.134; SMCD .193/.134 changes to either higher or lower numerical settings. Instrument-grade Except 301 & SG558: .140 and performance and long service life are enhanced by the heavy gold SG557 .120 Molded parts......................................Noryl-SE1, Black matte finish wiping contacts. Large readout characters are protected by dust-sealed Housing..............................................Black matte finish windows. Snap-together grouping and snap-in panel mounting minimize installation time and cost. SMCD models have snap detent TYPICAL PERFORMANCE CHARACTERISTICS: with slight audible click. Contact Rating......................................0.4 VA @ 20 VDC or Peak AC SMCD bi-directional code switches may be easily assembled into Contact Circuit Resistance....................0.12 Ohm max. (Total internal ckt. res.) groups of any number. The tabs or pins of one decade section press fit Mechanical Life....................................More than 106 operations into the holes in the adjacent section. Spacers and end mounting plates Operational Force..................................Approx. 14 oz. may be included in the same manner as desired. ENVIRONMENTAL SPECIFICATIONS Groups of SMCD switches with end plates snap into panel holes of the recommended size and are retained by plastic clips. Again, tools and Operating Temperature......................(-20°C to +80°C) additional hardware items are not required. Model Description SMCD - 131 - AK SMCPK End mounting plates (pair) SMCL 300" spacer section SMCA .100" spacer (with mounting clips) Codes Connections SMCADP .100" spacer, decimal point (with mounting clips) 111 = Decimal AK = pcb short B9L Connector, 9 contacts, solder lug terminals 131 = BCD AL = pcb long B9LS Connector, 9 contacts, PC pins 137 = BCD Complement LS = solder pin B9LS5PIN Connector, 5 contacts, PC pins B11LS Connectors, 11 contacts, PC pins (for 111) 141 = BCD + Complement ALU = pcb long downward SP1.2 Limit stop pin for SMD 10 position only 301 = Hexadecimal LS See Code Tables on Page J3 AK AL ALU .236+.004 (6.0+1.0) .022 (0.56) 1.89 8 (48.0) .280 (7.11) 0.20 EXSCMECPDT .310913:/ ..113490 (H5I.G08H) 1 (.2944.50) (.2826.60) J NUMBERS .300 .232 1.02 (7.62) (5.89) (26.0) 1.26 (32.0) S AK TYPES 1.66 M (42.1) TOP VIEW C BOARD TRACE DETAIL AL & AL/D TYPES 0.30 x n + 0.13 D (.20.9489A)K TYPES (.72.9459) AL TYP(E.20S.9489) (.72.9459) ALD TYPES (.20.9489) (01..0560) 0(7.3.600) TY(PT01.Y..00P40.) (7.6 x n + 3.30) Series .039 .060 .039 (T.D9YI9AP1..)(.10.5590) (1.52) DI(A0.. 9T9Y)P. (.10.5590) (1.0.5620) D(IA..00.. 39T99Y)P(..10.5590) (.10.6502) 0.04 TO 0.13 (1.00 TO 3.30) RECOMMENDED PANEL THICKNESS PANEL HOLE RANGE .886 (22.5) 0.3 x n + 0.24 SIDE VIEW (7.6 x n + 6.10) NX.300 SWITCH SHOWN WITH END MOUNTING PLATE WHERE n IS THE NUMBER OF SWITCHES +.138 P/N SMCPK (PAIR) 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