High Sensitivity Compact Tactile Switch for Wireless Devices

A low‑profile, high‑sensitivity SMD tactile switch engineered for modern wireless products where light actuation, crisp feedback, and ultra‑compact footprints are essential. Optimized for thin covers and small actuator pads, it delivers reliable clicks with minimal travel and low bounce for precise firmware detection across Bluetooth, Wi‑Fi, Zigbee, and proprietary RF devices.

Key features

• High sensitivity: light actuation forces starting at 120 gf for effortless, consistent triggering
• Compact footprint: ~3.5 × 2.6 mm class with low height options for ultra‑slim housings
• Clean, crisp tactile feel with short travel (approx. 0.2–0.35 mm)
• Robust materials: LCP housing, stainless‑steel dome, Ag/Au contacts
• Long life: up to 1,000,000 mechanical cycles (force dependent)
• Low electrical bounce (≤5 ms typical) for reliable edge detection
• Top or side actuation variants to suit space‑constrained layouts
• Optional splash‑resistant sealing for portable use cases
• Tape‑and‑reel packaging for automated SMT assembly

Typical specifications

• Type: SMD tactile switch (top‑actuated or side‑actuated)
• Footprint: approx. 3.5 × 2.6 mm (family variants available)
• Height: 1.4–2.0 mm options
• Operating force options: 120 gf (high sensitivity), 160 gf, 240 gf
• Travel: 0.2–0.35 mm
• Electrical rating: 12 VDC max, 50 mA max
• Contact resistance: ≤100 mΩ initial (typ.), maintained low over life
• Insulation resistance: ≥100 MΩ at 100 VDC
• Dielectric withstand: 250 VAC for 1 minute (no breakdown)
• Bounce time: ≤5 ms typical
• Mechanical life: up to 1,000,000 cycles (application dependent)
• Operating temperature: −40 to +85 °C (extended variants available)
• ESD robustness: up to ±8 kV air, ±4 kV contact (system dependent)
• Materials: LCP housing (UL94 V‑0), stainless‑steel dome, copper‑alloy terminals with Ni barrier and matte Sn, Ag or Au contact options
• Compliance: RoHS and REACH compliant; halogen‑free options
• Packaging: tape‑and‑reel, 8 mm carrier; MSL 1

Target applications

• Bluetooth earbuds and TWS charging cases (pair/reset, function keys)
• Bluetooth speakers, soundbars, smart remotes, trackers
• Wireless headsets, game controllers, handheld instruments
• Wearables and health devices needing light, precise actuation
• RF modules, routers, IoT nodes and smart home endpoints

Dimensions and soldering

• Recommended land pattern: balanced gull‑wing pads with solder mask defined; follow datasheet pad lengths and clearances to prevent solder wicking under the dome
• Keep‑out: maintain a mechanical keep‑out zone around the actuator to avoid cap interference and side loading
• Reflow profile (lead‑free): preheat 150–180 °C for 60–120 s; peak 240–250 °C ≤30 s; ramp up 2–3 °C/s; cool ≤4 °C/s; limit to 2 reflow cycles
• Flux/cleaning: use no‑clean flux; avoid aqueous or ultrasonic cleaning to protect the dome and contacts
• Pick‑and‑place: vacuum pick on reinforced top area; avoid pressing the actuator during placement
• Hand soldering (repair): keep tip ≤350 °C, contact time ≤3 s per terminal

Design guidelines

• Actuator interface: use a flat, centered pad or elastomer nub; target 0.1–0.2 mm preload and 0.2–0.35 mm travel
• Cover thickness: thin plastic covers (0.3–0.6 mm) work well; add local support ribs to minimize flex
• Debounce: implement 5–10 ms firmware debounce; a Schmitt‑trigger input further improves reliability
• Side‑load control: guide features or bosses to prevent shear forces on the dome
• EMI/ESD: place ground shields nearby; ensure enclosure paths for ESD to ground
• Environmental sealing: select sealed variant for splash‑prone or dusty environments
• Reliability: verify force/height stack‑up across tolerance and temperature

Quality and compliance

• Manufactured under ISO 9001/14001 quality systems
• RoHS and REACH compliant; halogen‑free materials available
• Reliability tested for mechanical life, bounce, temperature cycling, vibration, and ESD per internal standards
• Material declaration, CoC, and IMDS data available on request

Ordering options

• Actuation type: top‑actuated or side‑actuated
• Height: 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm nominal
• Operating force: 120 gf (high sensitivity), 160 gf, 240 gf
• Contact finish: silver or gold
• Sealing: standard or splash‑resistant
• Packaging: tape‑and‑reel (reel size and quantity options)
  Example ordering code format: HSC‑TS36‑T‑1.6H‑120GF‑Au‑STD

Documentation and support

• Datasheet with land pattern and reflow profile
• 2D drawings and 3D CAD (STEP/IGES)
• Reliability and life test reports
• Application notes for actuator pad design and debounce
• Material and compliance declarations
• Samples and evaluation kits available