MX Series Keyswitch MX Desktop Profile Dimensions: Inches (mm) 0.61 (15.6) 0.14 (3.6) 0.46 0.61 (11.6) (15.6) 0.20 (5.0) 0.13 (3.30) Specifications Mechanical Motion Voltage 12 VAC/DC max. 2 VDC min. Linear Feel Soft Tactile Feel Current 10mA AC/DC max. 10µA DC min. Operating Force 2.1 oz ±0.7 oz 2.0 oz ±0.7 oz Insulation Resistance 100 M Ω at 100 VDC Pretravel 0.08" ±0.24" 0.08" ±0.24" Capacitance <2pF (at 1kHz) Total Travel 0.16" -0.015" 0.16" -0.2" Bounce Time ≤5 msec Tactile Force N/A 2.3 oz ±0.7 oz (at 16 in/sec actuation speed) Life (at 5 V, 1mA, no load) Click Tactile Feel Alternate Action MX Linear 50 x 106 cycles Operating Force 1.8 oz ±0.5 oz 2.1 oz ±0.7 oz MX Soft Tactile 20 x 106 cycles Pretravel 0.09" ±0.24" 0.05" ±0.015" MX Click Tactile 20 x 106 cycles MX Alternate Action 50 x 105 cycles Total Travel 0.16" -0.02" 0.16" ±0.01" Initial Contact Resist. 200 m Ω (25 m Ω typical) Tactile Force 2.1 oz ±0.5 oz N/A Materials Plastics Thermoplastic, UL-rated Contacts AuAg 10 Spring Stainless steel Flammability Rating UL94HB Solderability Wave solder 5 seconds at 500°F Environmental Operating Temp. Range -10° to +70°C Storage Temp. Range -40° to +70°C Relative Humidity 5% to 95%, non-condensing 10-2

MX Series Keyswitch Mounting Options 0.197 +0.012 0.06+-0.006 PCB (with pins) Metal Frame (without pins) Circuit Board Layouts Grid line spacing = 0.05 inch Keyswitch without fixation pins 1-Pole 1-Pole w/LED 1-Pole w/Diode Ø0.157+-0.004 Ø0.059+-0.002 Ø0.039+-0.004 Keyswitch with fixation pins 1-Pole 1-Pole w/LED 1-Pole w/Diode Ø0.157+-0.004 Ø0.067+-0.002 Ø0.059+-0.002 Ø0.039+-0.004 Spacebar without frame 0.275+-0.004 Ø0.12+-0.004 10 0.60+-0.004 Ø0.157+-0.002 A+-0.004 10-3

MX Series Keyswitch Keycap Dimensions Metal Frame Cutout Dimensions Cylindrical Type (8 mm) Keyswitch 0.551+-0.002 0.82 Row E 0.74 Row B D2 DIN6784 0.736 Row D 0.704 Row C 0.551+-0.002 0.06+-0.004 C3 DIN6784 R 0.012 Max. 0.43 A B C D E F Spacebar (Keycap sizes 1 x 2, 1 x 2.25, 1 x 2.75) 0.166+-0.004 A+-0.004 0.262+-0.004 0.704 0.13 0.032+-0.004 R 0.012 max 0.53+-0.006 Standard Type (8 mm) 0.69 0.11+-0.008 R 0.012 max 0.02 0.26+-0.004 0.55+-0.002 0.031+-0.004 0.38 0.12+-0.004 0.484+-0.004 Spacebar (Keycap sizes 1 x 3, 1 x 7, 1 x 8, 1 x 9, 1 x 10) 0.69 0.13 0.55+-0.002 0.11+-0.008 0.484+-0.004 0.262+-0.004 R 0.012 max Spacebar Mounting Options 0.12+-0.004 R 0.m01a2x 0.26+-0.004 A+-0.004 Keycap (8mm) 0.165+-0.004 0.53+-0.006 Support Housing Leveling Mechanism Kits Wire PCB (with pins) 1 x 2 1 x 8 Keycap Size 1 x 2, 2.5 1 x 3 1 x 8 1 x 9 1 x 7 1 x 2, 2.75 1 x 10 Keycap Type Std & Cylin Std & Cylin Std Cylin Cylin A (inches) 0.94 1.5 5.25 5.25 4.5 Metal Frame P/N w/frame G99-0224 G99-0225 G99-0226 G99-0226 G99-0379 P/N w/o frame G99-0742 G99-0743 G99-0744 G99-0744 G99-0745 Metal Frame (without pins) 10-4

MX Series Keyswitch Soldering Parameters Ordering Information 1. Flux Station Part Number Description A. Flux – Fry type GR8 MX1A-11DN Standard force, momentary face plate B. Applied by foaming mount with diode C. Specific gravity – 0.820 g/cm3 MX1A-11NN Standard force, linear, face plate mount 2. Conveyor Speed MX1A-11NW Standard force, linear, PCB mount A. 2.3 meters/min. MX1A-21NW Higher force, linear, PCB mount 3. Pre-heat Temperature MX1A-31NN Alternate action, face plate mount A. +88°C measured on top surface of PCB MX1A-31NW Alternate action, PCB mount 4. Solder MX1A-C1NN Standard force, soft tactile, face plate mount A. 63/37 alloy B. Dry wave – no oil MX1A-C1NW Standard force, soft tactile, PCB mount C. Approximate contact with wave – 2 seconds MX1A-E1NN Standard force, click tactile, face plate mount 5. Cleaning MX1A-E1NW Standard force, click tactile, PCB mount A. Fry GR8 is non-hygroscopic flux and does not require cleaning B. If cleaning is required on isolated areas such as finger connector, cold cleaning by hand with Alpha 564 is recommended. Care must be taken to avoid solvent entering the keymodule. Ordering Information MX 1 A 1 1 N N Keyswitch/Type C C C PCB OD Operating Characteristics, OD Keystem OD Mounting E Actuating Force and Key Style E Configuration E Pins Contact Code Material 0 Special 1 Std straight N (metaNl ofr apminse req) for cylin & std 1 AuAg10 Contact 1 Momentary, single pole, 2.1 oz, standard keycaps W With pins 10mA/12V Code Config. keyswitch, black keystem max 2 Momentary, single pole, 2.8 oz, spacebar, A SPSTNO grey 37 keystem 2 — B — 3 Alternate action, single pole, 2.1 oz 3 — C Momentary, single pole, tactile feel, 2.3 oz, LED C Special 4 — clear keystem Code Diode 5 Special D — D Momentary, single pole, tactile feel, 2.8 oz, N No LED spacebar, grey 39 keystem No diode E Momentary single pole, tactile feel 2.1 oz, R Red LED “click” differential movement, blue keystem no diode F Momentary, single pole, tactiel feel, 2.8 oz, 10 “click” differential movement, space bar, G Green LED green keystem no diode Y Yellow LED w/diode D No LED w/diode J w/jumper wire no LED no diode 10-5