Product Specifications for SKRPACE010

General Information

• Document Number: KRP-702
• Product Number: SKRPACE010
• Date: July 2017
• Manufacturer: ALPS ELECTRIC CO., LTD.

1. General

• Application: Single key switches without key tops (TACT SWITCHES: MECHANICAL CONTACT).
• Operating Temperature Range: -40°C to 90°C (normal humidity, normal air pressure).
• Storage Temperature Range: -40°C to 90°C (normal humidity, normal air pressure).
• Test Conditions:Normal temperature: 5°C to 35°CNormal humidity: 25% to 85% relative humidityNormal air pressure: 86 to 106 kPa (860 to 1060 mbar)

2. Appearance, Style, and Dimensions

• Appearance: No defects that affect the serviceability of the product.
• Style and Dimensions: Refer to the assembly drawings.

3. Type of Actuating

• Tactile Feedback: Tactile feedback.

4. Contact Arrangement

• Circuit Form: 1 pole 1 throw (1 circuit 1 contact).
• Details: Refer to the assembly drawings.

5. Ratings

• Maximum Ratings: 16 V DC, 50 mA.
• Minimum Ratings: 1 V DC, 10 μA.

6. Electrical Specifications

• Contact Resistance:Measurement: Apply a static load to the center of the stem.Conditions: 5.1 N depression, 1 kHz small-current contact resistance meter or voltage drop method at 5VDC 10mA.Criteria: 500 mΩ Max.
• Insulation Resistance:Measurement: Apply 100 V DC for 1 minute between all terminals and ground (frame).Criteria: 100 MΩ Min.
• Voltage Proof:Test voltage: 250 V AC (50-60 Hz) for 1 minute.Applied position: Between all terminals and ground (frame).Criteria: No breakdown.
• Bounce:Measurement: Test at "ON" and "OFF" by lightly striking the center of the stem at a rate of 3 to 4 operations per second.Criteria: ON bounce: 10 ms Max., OFF bounce: 10 ms Max.

7. Mechanical Specifications

• Operating Force:Measurement: Measure the maximum load required for the switch to come to a stop.Criteria: 2.55 N ± 0.69 N.
• Travel:Measurement: Measure the travel distance for the switch to come to a stop.Criteria: 0.2 +0.2/-0.1 mm.
• Return Force:Measurement: Measure the force of the stem to return to its free position.Criteria: 0.49 N Min.
• Stop Strength:Measurement: Apply a static load in the direction of stem operation.Criteria: No mechanical or electrical damage.
• Stem Strength:Measurement: Measure the maximum force to withstand a pull applied opposite to the direction of stem operation.Criteria: 4.9 N.

8. Environmental Specifications

• Resistance to Low Temperatures:Conditions: -40°C ± 2°C for 1000 hours.Criteria: Refer to items 6, 7.1, and 7.2.
• Heat Resistance:Conditions: 90°C ± 2°C for 1000 hours.Criteria: Refer to items 6, 7.1, and 7.2.
• Moisture Resistance:Conditions: 60°C ± 2°C, 90-95% relative humidity for 1000 hours.Criteria: Contact resistance: 500 mΩ Max., Insulation resistance: 10 MΩ Min., Refer to items 6.3, 6.4, 7.1, and 7.2.
• Temperature Cycling:Conditions: 166 cycles of +90°C for 2 hours and -40°C for 1 hour.Criteria: Refer to items 6, 7.1, and 7.2.
• Resistance to Hydrogen Sulfide Gas (H₂S):Conditions: 1 ppm H₂S gas, 40°C ± 2°C, 75% ± 5% relative humidity for 240 hours.Criteria: Contact resistance: 1 Ω Max.
• Resistance to Sulfur Dioxide (SO₂):Conditions: 10 ppm SO₂ gas, 40°C ± 2°C, 75% ± 5% relative humidity for 240 hours.Criteria: Contact resistance: 1 Ω Max.

9. Endurance Specifications

• Operating Life:Conditions: 16 VDC, 50 mA resistive load, 2 to 3 operations per second, 3.23 N depression, 50,000 cycles.Criteria: Contact resistance: 1000 mΩ Max., Insulation resistance: 10 MΩ Min., Bounce: ON bounce 20 ms Max., OFF bounce 20 ms Max., Operating force: ±30% of initial force.
• Vibration Resistance:Conditions: 10 to 55 Hz, 1.5 mm total amplitude, logarithmic or uniform sweep, 2 hours each in three perpendicular directions.Criteria: Refer to items 6.1, 7.1, and 7.2.
• Shock Resistance:Conditions: 980 m/s² (100 G), 6 msec acting time, 6 directions, 3 times per direction.Criteria: Refer to items 6.1, 7.1, and 7.2.

10. Soldering Conditions

• Hand Soldering:Conditions: Maximum soldering temperature: 350°C, Maximum continuous soldering time: 3 seconds, Maximum soldering iron capacity: 60 W.
• Reflow Soldering:Conditions: Temperature profile, Maximum soldering time: 2 times, Maximum peak temperature: 260°C.
• Other Precautions:Ensure no flux on the switch terminals and PCB before soldering.Do not clean the switch with solvents after soldering.Recommended cream solder: M705-GRN360-K2 (SENJU METAL INDUSTRY CO., LTD) or equivalent.Avoid locating through holes adjacent to the switch mounted area.Ensure the right reflow soldering conditions before use.Perform reflow soldering within the recommended conditions to avoid deteriorating the click rate.Protect the switch assembly against flux penetration from its top side.Cream solder thickness: 0.15 mm.

Precautions in Use

• General:Designed for general electronic devices. For more sophisticated equipment, verify suitability or consult with the manufacturer.Designed for use with direct current resistance. Consult for other types of resistance (inductive or capacitive).
• Soldering and Assembly:Avoid applying load to terminals during soldering to prevent deformation and electrical defects.Confirm soldering conditions under actual production conditions.Handle with care to avoid stress on the stem.Avoid placing the switch at the edge of the PCB to prevent flux penetration.Perform reflow soldering within recommended conditions to avoid deteriorating the click rate.
• Washing Process:Do not clean the switch with solvents after soldering.
• Mechanism Design:Refer to the recommended dimensions in the engineering drawings for mounting holes and patterns.Avoid dip-soldering chip components on the backside of the PCB after reflow soldering.Avoid applying stress to the stem from the side.Press the center of the stem to ensure consistent click feel.Avoid using the switch for mechanical detection functions.Do not apply stress beyond the specified limits.Consult with the manufacturer if changing the switch's usage method.
• Using Environment:The switch is not sealed and may fail due to dust ingress. Take precautions against dust.Avoid using in environments with sulfide gas or exhaust fumes.Avoid using rubber materials, adhesives, or lubricants that generate sulfurization or oxidation gases.Avoid using in high humidity or dewing environments.
• Storage Method:Store in a cool, dry place away from direct sunlight and corrosive gases.Use within six months of delivery.Store remaining switches in a plastic bag after breaking the seal