Tactile Switches KMR 4 Series Microminiature SMT Top Actuated Features/Benefits Typical Applications Automotive Small footprint Industrial electronics 4 actuation forces Excellent tactile feel Medical equipment Ultra low current capabilities IP40 B Specification Electrical Silver Gold FUNCTION: momentary action MAXIMUM POWER: 1 VA 0.2 VA CONTACT ARRANGEMENT: 1 make contact = SPST, N.O. MAXIMUM VOLTAGE: 32 VDC 32 VDC MINIMUM VOLTAGE: 20 mVDC 20 mVDC TERMINALS: Gullwing type for SMT MAXIMUM CURRENT: 50 mA 10 mA MINIMUM CURRENT: 1 mA* 1 mA* Mechanical DIELECTRIC STRENGTH: 250 Vrms CONTACT RESISTANCE: 100 m Type G and NG Operating Operating INSULATION RESISTANCE: 1G force life See description Travel (mm) BOUNCE TIME: 3 ms N (grs) (cycles) below *For ULC version minimum current is 1A at 1.8 VDC KMR411 LFS 1.2 (120) 0.30 100,000 0.20 mm 0.1 KMR411 ULC LFS 1.2 (120) 0.30 100,000 0.20 mm 0.1 KMR413 LFG 1.2 (120) 0.30 100,000 0.20 mm 0.1 Environmental Silver Gold KMR413 ULC LFG 1.2 (120) 0.30 100,000 0.20 mm 0.1 OPERATING TEMPERATURE: -40C to 85C -40C to 125C KMR421 LFS 2.0 (200) 0.50 100,000 0.25 mm 0.1 STORAGE TEMPERATURE: -55C to 85C -55C to 125C KMR421 ULC LFS 2.0 (200) 0.50 100,000 0.25 mm 0.1 KMR423 LFG 2.0 (200) 0.50 100,000 0.25 mm 0.1 KMR423 ULC LFG 2.0 (200) 0.50 100,000 0.25 mm 0.1 Process KMR431 LFS 3.0 (300) 0.75 100,000 0.25 mm 0.1 KMR431 ULC LFS 3.0 (300) 0.75 100,000 0.25 mm 0.1 Soldering: Lead free reflow soldering process in accordance with KMR432 LFS 3.0 (300) 0.75 300,000 0.25 mm 0.1 IEC 61760-1. KMR432ULC LFS 3.0 (300) 0.75 300,000 0.25 mm 0.1 KMR433 LFG 3.0 (300) 0.75 100,000 0.25 mm 0.1 Packaging KMR433ULC LFG 3.0 (300) 0.75 100,000 0.25 mm 0.1 KMR441 LFS 4.0 (400) 1.00 100,000 0.30 mm 0.1 In reels of 6,000 pieces KMR441 ULC LFS 4.0 (400) 1.00 100,000 0.30 mm 0.1 External diameter 330 mm 2 mm KMR442 LFS 4.0 (400) 1.00 200,000 0.30 mm 0.1 KMR442 ULC LFS 4.0 (400) 1.00 200,000 0.30 mm 0.1 NOTE: Specifications listed above are for switches with standard options. KMR443 LFG 4.0 (400) 1.00 100,000 0.30 mm 0.1 For information on specific and custom switches, consult Customer Service Center. KMR443 ULC LFG 4.0 (400) 1.00 100,000 0.30 mm 0.1 TACTILE FEELING: KMR 4 series with actuation force in 2N - 3N - 4N: 25% KMR 4 series with actuation force in 1.2N: 20% Part Number Description For any part number different from those listed above, please consult your local representative. K M R 4 Total height 4 2,5 mm LFS Lead free compatible, silver plated LFG Lead free compatible, gold plated Actuation Force 1 1.2 N (120 grams) 2 2 N (200 grams) 3 3 N (300 grams) 4 4 N (400 grams) Low Current capability Void Under standard specification Contact Material ULC Low current 1 Silver 2 Silver long life* Grounding option * Silver long life is available in 3N and 4N actuation force. For other versions, 3 Gold G Ground pin please contact Customer Service. NG No Ground pin Dimensions are shown:Dimensions are shown: mmmm Specifications and dimensions subject to changeSpecifications and dimensions subject to change 24 Aug 21 www.ckswitches.comwww.ckswitches.com B19B19KMR 4 Series Microminiature Tact Switch for SMT ELECTRICAL DIAGRAM G - Ground Pin 4 1 3 2 0,2 0,1 0,1 5 4,6 3,2 4,2 0,2 1,7 B 5 4 1 2 3 RECOMMENDED LAYOUT 2,11 NG - No Ground Pin ELECTRICAL DIAGRAM 4 1 0,1 3 2 4,6 5 4,2 0,2 3,2 RECOMMENDED LAYOUT 4 1 2 3 2,11 TAPE & REEL DE-REELING DIRECTION SECTION A-A OUT OF THE TAPE 0 6 max 2,75 0,1 4 0,1 2 0,05 1,5 0,1 B A A 0 6 max B 0,292 0,02 GROUND TERMINAL 3,03 0,1 Dimensions are shown: mm Specifications and dimensions subject to change 24 Aug 21 www.ckswitches.com B20 Tactile Switches 2,8 0,2 2,8 0,2 0,6 0,6 0,6 0,6 +0,3 12 -0,1 5,5 0,05 1,75 1,61 1,4 0,15 1,61 1,4 0,15 2,2 2,5 0,2 2,2 2,5 0,2 0,04 0,03 2,6 2,45 0,55 2,6 1 0,6 1 0,6 4,95 0,1