STK BU

DIGITAST Microminiature SPDT, Key Switches Features/Benefits • High reliability/long life •  Designed for low level Typical Applications • Medical • Instrumentation • Industrial electronics switching • • • • Ready to implement on PCB • Audio electronics Latching function available Several button options RoHS compliant and compatible Construction Electrical FUNCTION: momentary or push-push CONTACT ARRANGEMENT: 1 change over contact SPDT, NO MODE OF SWITCHING: Non-shorting DISTANCE BETWEEN BUTTON CENTERS: HORIZONTAL MINIMUM: 12,7 (0.500) or 17,78 (0.700) VERTICAL MINIMUM: 17,78 (0.700) TERMINALS: PC pins MOUNTING: Soldering, centering pins SWITCHING POWER MAX.: 240 mW DC SWITCHING VOLTAGE MAX.: 24 V DC SWITCHING CURRENT MAX.: 10 mA DC CARRYING CURRENT AT 20˚C (push-push version): 100 mA DIELECTRIC STRENGTH (50 Hz, 1 min): 500 V OPERATING LIFE with or without max. switching power Momentary: ≥ 5 x 106 operations Push-push: ≥ 5 x 105 operations CONTACT RESISTANCE: Initial ≤ 50 mΩ After 5 x 106 operations: ≤ 100 mΩ INSULATION RESISTANCE: ≥ 1010 Ω CAPACITANCE at f= 10 kHz: ≤ 0.8pF BOUNCE TIME:  ≤ 2.5 ms Operating speed 400 mm/s (15.75/s) Mechanical TOTAL TRAVEL: ≤ 3 (.0018) SWITCHING TRAVEL: 1,5 (0.0591) LATCHING TRAVEL: 1,8 (0.0709) OPERATING FORCE:  1.5 +/- 0.5 N (150 +/- 50 grams) Process Environmental SOLDERABILITY: Wave soldering, compatible with lead free soldering profile Hand soldering, 350˚C for 3 seconds OPERATING TEMPERATURE: -25˚C to 85˚C. How To Order Our easy build-a-switch concept allows you to mix and match options to create the switch you need. To order, select desired option from each category and place it in the appropriate box. Some of the configurations may not be available or could require some development. Switch A Reference SER BK AU OA 1st LED Color*** NONE No LED RD Red YE Yellow GN Green LED NONE No LED L 1 LED 2L 2 LED’s Button Color** None (SERU) BK Black GY Gray WH White RD Red BU Blue LED Spacing* NONE Narrow LED Spacing (TYP Europe) 7.62 Wide LED Spacing (TYP No. America) Button Reference SRK BK D Function EE Latching OA Non-latching Contact Material AU Gold 2nd LED Color*** NONE No LED RD Red YE Yellow GN Green Body Color NONE White (STD) BRN Brown K Button Style SR Narrow ST Wide LED Holes NONE No LED holes L 1 LED hole 2L 2 LED holes * LED spacing only applies when 1 LED requested ** Additional button colors available by request *** Additional LED colors available by request including Bi color configurations Button Color** BK Black GY Gray Latching WH White None For use with momentary switch RD Red EE With “EE” staple for latching BU Blue Dimensions are shown: mm Specifications and dimensions subject to change D–25 www.ckswitches.com Key Switches Series SER Narrow button SET Wide button SERU Switch body only (no button) U DIGITAST Microminiature SPDT, Key Switches DESIGNATION NARROW BUTTON (0.0394) 4,5 8 10,16 (0.4) 14,74 (0.6) ø1 (0.0394) SER SERL (0.177) 14,3 (0.2) 1 (0.315) 5,08 5,08 (0.563) 12,3 (0.484) 0 0 (0.2) 221 (0.3) 7,62 (0.1) 17,5 (0.680) 2,54 SER Total travel 3 (0.118) Switching travel 1.5 (0.0591) 0,4 [0.0157] 0,7 (0.0276) SER2L 12,3 (0.484) 1st LED 2nd LED 17,1 (0.673) 14,3 (0.563) 0 0 WIDE BUTTON 221 SET SET SETL Total travel 3 (0.118) Switching travel 1.5 (0.0591) SET2L 17,3 (0.681) 1st LED 2nd LED 17,1 (0.673) SERU 17.3 NO BUTTON [0.681] 15.24 D 12.3 [0.484] 1 2 0 2 [0.3] 7.62 0 Key Switches [0.6] 5.08 [0.0197] 4.5 [0.787] ø1 [0.0394] [0.177] [0.311] 2 7.9 0.5 [0.2] 0.4 [0.015] 0.7 [0.0276] Dimensions are shown: mm Specifications and dimensions subject to change D–26 www.ckswitches.com DIGITAST Microminiature SPDT, Key Switches LED 7,62 [0.3] - [0.3] 7,62 0 5,08 2,54 [0.2] [0.1] + 5,08 15,24 [0.6] 5,08 2,54 [0.2] [0.2] 10,16 [0.1] 2,54 0 [0.1] 2 1 2,54 0 0 + - 1 0 7,62 [0.3] 2 0 7.62 mm Spacing (TYP No. America) 2 LEDs [0.1] 2L 1 LEDs 2 L NO LED 1 NONE + 5,08 5,08 2,54 [0.2] [0.2] [0.1] 10,16 [0.4] [0.4] 15,24 15,24 [0.6] [0.6] NARROW SPACING (TYP EUROPE) 2,54 ø 1.0±0.1 (0.0394±0.00349) ø 1.1±0.05 (0.0433±0.00197) 1 0 - 7,62 [0.3] [0.1] 2 0 + + 5,08 5,08 [0.2] [0.2] 2,54 [0.1] 10,16 [0.4] 15,24 [0.6] TOP VIEW OF PCB BUTTON COLOR BK BLACK GY GRAY Other button colors available by request [red (RD), green (GN), white (WH), yellow (YE) , blue (BU) , orange (OG)]. LED COLOR OPTION CODE COLOR NONE Models without LED RD Red GN Green YE Yellow Key Switches D CONTACT MATERIAL OPTION CODE MATERIAL AU Gold FUNCTION OPTION CODE COLOR SCHEMATIC OA Momentary 0 2 0 1 0 2 0 1 EE Push-Push Dimensions are shown: mm Specifications and dimensions subject to change D–27 www.ckswitches.com