High-End Tact Switch 3x7 For LED Lighting Controllers

Premium 3.0 x 7.0 mm tactile switch engineered for LED lighting controllers, smart dimmers, scene keypads, and building automation panels. Delivers crisp, refined feedback, long service life, low contact bounce, and high thermal robustness—ideal for low-current signal inputs in lighting control electronics.

Key features:

• 3.0 x 7.0 mm compact footprint with elongated body for narrow keycaps
• Height options: 2.1 mm, 3.1 mm, 4.3 mm, 5.0 mm (profile choices for slim panels)
• Actuation forces: 120 gf, 180 gf, 250 gf (balanced to prevent accidental presses)
• Short, precise travel: 0.25 ± 0.05 mm with tactile “snap”
• Long life: up to 1,000,000 cycles (force- and height-dependent)
• Low bounce: typically <5 ms, stable for fast MCU scanning
• Operating temperature: −40 to +105°C for lighting enclosures
• Gold-plated contacts for reliable low-current switching (signal level)
• Lateral stability to minimize cap wobble; consistent center actuation
• SMD gull-wing terminals; Pb-free reflow compatible
• Optional splash-resistant top film for dusty or humid environments
• ESD robustness: up to 8 kV air, 4 kV contact (system-level dependent)
• Halogen-free; RoHS and REACH compliant

Specifications (typical):

• Electrical rating: 1–50 mA at 5–12 V DC (signal only; not for mains)
• Contact resistance: ≤100 mΩ initial; ≤200 mΩ over life
• Insulation resistance: ≥100 MΩ at 100 V DC
• Dielectric withstand: 250 V AC for 1 minute
• Travel: 0.25 mm; over-travel protection built-in
• Actuation force options: 120/180/250 gf ±20%
• Mechanical life: up to 1,000,000 cycles (120–180 gf variants); 500,000 cycles (250 gf)
• Operating temperature: −40 to +105°C; storage −40 to +125°C
• Bounce time: typically <5 ms
• Materials: stainless steel dome; Au over Ni contacts; high-temperature thermoplastic housing

Applications:

• LED lighting wall controllers and smart dimmer keypads
• Scene control panels (hospitality, retail, residential)
• Zigbee/BLE/Thread lighting remotes
• DMX/RDM control surfaces and console key modules
• Building automation HMIs and HVAC/lighting combined panels

Dimensions and soldering:

• Body: 3.0 x 7.0 mm; actuator centered
• Recommended PCB land pattern: two end pads with solder mask-defined edges; central keep-out under actuator
• Package: tape-and-reel, 12 mm tape; 4,000 pcs/reel (typical)
• Reflow profile (Pb-free): peak 245–250°C; 60–90 s above 217°C; max two reflow cycles
• Hand soldering: ≤350°C, ≤3 s per terminal; avoid force on actuator during soldering
• Cleaning: do not use ultrasonic cleaning unless sealed version specified

Design guidelines:

• Choose 120–180 gf for handheld remotes and soft-touch wall pads; 250 gf for panels with thick overlays or to prevent accidental activation
• Match switch height to overlay thickness to avoid pre-load; target 0.1–0.2 mm free gap above actuator
• Implement firmware debounce of 5–10 ms; optional press-and-hold threshold 300–500 ms
• For backlit keycaps, use light pipes positioned to avoid direct pressure on actuator
• Provide mechanical support under PCB near the switch to maintain feel consistency
• Place ground guard around signal traces if used near LED driver power stages
• Avoid solvent ingress; specify splash-resistant variant for humid/dusty sites

Compliance and reliability:

• RoHS, REACH, halogen-free
• Lifecycle and high-temperature reliability tested to industry standards
• MSL Level 1 (floor-life unlimited under standard conditions)

Ordering information:

• Series: TSW-37 (3 x 7 mm)
• Options:
  • Height: H21/H31/H43/H50
  • Force: F12/F18/F25
  • Plating: Au (gold)
  • Seal: S (splash-resistant) or N (standard)
• Example part numbers:
  • TSW-37-H31-F18-Au-N (3.1 mm, 180 gf, standard)
  • TSW-37-H21-F12-Au-S (2.1 mm, 120 gf, splash-resistant)
  • TSW-37-H43-F25-Au-N (4.3 mm, 250 gf, standard)

Resources:

• Datasheet and recommended land pattern
• 3D STEP model and 2D drawing
• Reliability and reflow profile report
• Tape-and-reel packaging spec