Product Test Methods

All Xymox switches are put through rigorous testing to ensure trouble free components

  PropertyTest MethodPerformance Standard Comments
1. Contact Resistance MIL-STD-202F, Method 307 Less than 100 Ohms Measured from termination area on tail, switch closed
2. Insulation Resistance MIL-STD-202F, Method 302 Test Condition B (500 Volts) Greater than 106 Ohms for 60 seconds All switches in parallel
3. Dielectric Withstanding Voltage MIL-STD-202F, Method 301 500 VAC, 60 Seconds. No Breakdown All switches in parallel
4. Capacitance MIL-STD-202F, Method 305 (1KHz) Less than 20 pfd Measured between adjacent tracks
5. Intermediate Current Switching MIL-STD-202F, Method 312 25°C only Contact bounce less than 10 milliseconds after 5x106 cycles 4-8 oz. actuation force, 3Hz, 50% duty cycle
6. Conductive Material Adhesion ASTM D3359-78, Method B (adhesive tape pull test) Classifications 5 Run on 1" wide test sample
7. Flexibility ASTM D2861-78, Sections 20-24 (inside an outside bends over 0.25" diameter for 2" length, 16 tracks tested at once) 500 cycles with less than 10x increase in resistance (2x typical) 10 cpm, performance calculated back to less than 10x change per switch circuit over 0.125" radius bend
8. Humidity (Steady State) MIL-STD-202F, Method 103B, Test Condition C (504 hrs. at 40°C, 95% RH) Insulation resistance greater than 106 Ohms after 24 hours at ambient 15 VDC applied to all switches in parallel during test
9. Moisture Resistance MIL-STD-202F, Method 106E except Step 7B (10 cycles lasting 24 hrs. per cycle of 65°C, 25°C, -10°C at 95% RH, -10°C only 5 cycles with no RH control) Insulation resistance greater than 106 Ohms after 24 hours at ambient 15 VDC applied to all switches in parallel during steps specified
10. Thermal Shock MIL-STD-202F, Method 107D, Test Condition A-3 (100 cycles of -40°C to 85°C) See Note 1 0.5 hr. per exposure -40°C instead of -55°C, 85°C instead 65°C
11. Life (at elevated temperature) MIL-STD-202F, Method 108A, Test Condition C, 70°C (500 hrs. at 70°C no RH control) See Note 1 15 VDC applied to all switches in parallel during test
12. Vibration MIL-STD-202F, Method 204D, Test Condition C (55 to 2000 Hz 10g peak) No closures during test or visual effect 15 VDC applied to all switches in parallel during test
13. Shock (Specified Pulse) MIL-STD-202F, Method 213B, Test Condition C (half-sine wave, 6ms duration, 100g maximum.) No closures during test or visual effect 15 VDC applied to all switches in parallel during test
Note 1 - Initial and Final Test shall include:
A. Insulation Resistance - Initial greater than 109 Ohms. Final minimum of 109 Ohms.
B. Contact Resistance - Initial and Final 100 Ohms or less.
C. Actuation Force - Initial and Final 4-8 oz.
 

Selected Stock Switches

3/4 inch Keyboards

3/4 inch center to center tactile feedback keyboards are ideally suited for use where larger matrices and more switches are needed and user feedback is essential. They offer the user good spacing for finger placement on the key areas as well as offering the designer good flexibility in faceplate design.

Learn More about 3/4 inch Keyboards...