KMR 2 Series Microminiature SMT Top Actuated Features/Benefits Typical Applications • Small footprint • Automotive • 4 actuation forces • Industrial electronics • Excellent tactile feel • Medical equipment • Ultra low current capabilities • IP40 Specification Electrical Silver Gold T a FUNCTION: momentary action MAXIMUM POWER: 1 VA 0.2 VA c CONTACT ARRANGEMENT: 1 make contact = SPST, N.O. MAXIMUM VOLTAGE: 32 VDC 32 VDC t i TERMINALS: Gullwing type for SMT MINIMUM VOLTAGE: 20 mVDC 20 mVDC l e MAXIMUM CURRENT: 50 mA 10 mA S Mechanical MINIMUM CURRENT: 1 mA* 1 mA* w DIELECTRIC STRENGTH: ≥ 250 Vrms Type G and NG Operating Operating CONTACT RESISTANCE: ≤ 100 mΩ it See description force life c below N (grs) (cycles) Travel (mm) INSULATION RESISTANCE: ≥ 1GΩ h BOUNCE TIME: ≤ 3 ms e s KMR211 LFS 1.2 (120) ± 0.30 200,000 0.20 mm ± 0.1 *For ULC version minimum current is 1µA at 1.8 VDC KMR211 ULC LFS 1.2 (120) ± 0.30 200,000 0.20 mm ± 0.1 KMR213 LFG 1.2 (120) ± 0.30 200,000 0.20 mm ± 0.1 KMR213 ULC LFG 1.2 (120) ± 0.30 200,000 0.20 mm ± 0.1 Environmental Silver Gold KMR221 LFS 2.0 (200) ± 0.50 200,000 0.25 mm ± 0.1 OPERATING TEMPERATURE: -40˚C to 85˚C -40˚C to 125˚C KMR221 ULC LFS 2.0 (200) ± 0.50 200,000 0.25 mm ± 0.1 KMR223 LFG 2.0 (200) ± 0.50 200,000 0.25 mm ± 0.1 STORAGE TEMPERATURE: -55˚C to 85˚C -55˚C to 125˚C KMR223 ULC LFG 2.0 (200) ± 0.50 200,000 0.25 mm ± 0.1 KMR231 LFS 3.0 (300) ± 0.75 150,000 0.25 mm ± 0.1 Process KMR231 ULC LFS 3.0 (300) ± 0.75 150,000 0.25 mm ± 0.1 KMR232 LFS 3.0 (300) ± 0.75 300,000 0.25 mm ± 0.1 Soldering: Lead free reflow soldering process in accordance with KMR232 ULC LFS 3.0 (300) ± 0.75 300,000 0.25 mm ± 0.1 IEC 61760-1. KMR233 LFG 3.0 (300) ± 0.75 150,000 0.25 mm ± 0.1 KMR233 ULC LFG 3.0 (300) ± 0.75 150,000 0.25 mm ± 0.1 Packaging KMR241 LFS 4.0 (400) ± 1.00 100,000 0.30 mm ± 0.1 KMR241 ULC LFS 4.0 (400) ± 1.00 100,000 0.30 mm ± 0.1 In reels of 7,000 pieces KMR242 LFS 4.0 (400) ± 1.00 200,000 0.30 mm ± 0.1 External diameter 330 mm ± 2 mm KMR242 ULC LFS 4.0 (400) ± 1.00 200,000 0.30 mm ± 0.1 KMR243 LFG 4.0 (400) ± 1.00 100,000 0.30 mm ± 0.1 NOTE: Specifications listed above are for switches with standard options. KMR243 ULC LFG 4.0 (400) ± 1.00 100,000 0.30 mm ± 0.1 For information on specific and custom switches, consult Customer Service Center. TACTILE FEELING: KMR 2 series with actuation force in 2N - 3N - 4N: ≥ 30% KMR 2 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 2 Total height 2 1,9 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 Contact Material Void Under standard specification 1 Silver ULC Low current 2 Silver long life* Grounding option 3 Gold G Ground pin NG No Ground pin * Silver long life is available in 3N and 4N actuation force. For other versions, please contact Customer Service. Dimensions are shown: mm Specifications and dimensions subject to change 8 jun 16 www.ckswitches.com B–11

KMR 2 Series Microminiature Tact Switch for SMT KMR 2 Series - 1.9 mm height PCB layout shown with ground pin option 1,41,9 B 4,6 4,2 s e h 0,6 c t 2,8 1,612,2 i w 0,6 S e 2,11 il 3,2 ct 1,7 a T 0,55 2,45 0,62,6 1 5 TAPE & REEL DE-REELING DIRECTION SECTION A-A OUT OF THE TAPE 70 max 2,13 ± 0,1 4 ± 0,1 2 ± 0,05 ø1,5 ± 0,1 75 B 1, 5 0 0, ± +0,3-0,1 5,5 0,1 12 5 ± 9 4, A A 60 max +0,25 0,292 ± 0,02 GROUND TERMINAL B ø1,5 0 3,03 ± 0,1 DIRECTION OF FEED Dimensions are shown: mm Specifications and dimensions subject to change 8 jun 16 www.ckswitches.com B–12

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: C &K Switches: KMR211G LFS KMR221G LFS KMR223GLFG KMR231GLFS KMR233GLFG KMR241GLFS KMR243GLFG KMR213G LFG KMR242NG LFS KMR241G ULC LFS KMR242NG ULC LFS KMR232G LFS KMR231NG ULC LFS KMR242G LFS KMR231G ULC LFS KMR211NG LFS KMR241NG ULC LFS KMR242G ULC LFS KMR232G ULC LFS KMR232NG ULC LFS KMR231NG LFS KMR221NG LFS KMR232NG LFS KMR241NG LFS KMR223NGULCLFG KMR221GULCLFS KMR231NGLFS KMR211GLFS KMR221NGLFS KMR231GULCLFS KMR231NGULCLFS KMR232GLFS KMR232GULCLFS KMR242GULCLFS KMR242NGLFS KMR242NGULCLFS KMR211NGLFS KMR213GLFG KMR221GLFS KMR232NGLFS KMR232NGULCLFS KMR241GULCLFS KMR241NGLFS KMR241NGULCLFS KMR242GLFS