Switch For PCB

Compact, low-profile push button switch designed for direct PCB mounting. Offers crisp tactile feedback, reliable lifecycle, and options for surface-mount (SMD) or through-hole (THT). Ideal for user input, reset/boot, calibration, and mode selection in space-constrained electronics.

Key Features

• Function: SPST-NO, momentary (push-to-make)
• Mounting: SMD gull-wing or THT 4-pin
• Rating: 50–100 mA at up to 12 VDC (resistive); logic-level compatible
• Tactile feel: defined click; multiple operating force options
• Travel: short stroke for fast actuation (0.25–0.5 mm)
• Lifecycle: up to 1,000,000 actuations, depending on force/model
• Sealing: top-sealed washable variants; optional IP67 sealed versions
• High-temperature housing for SMT reflow; UL94 V-0 plastics
• Footprints: 4.5×4.5 mm, 6×6 mm, 7×7 mm bodies; heights 1.5–7.0 mm
• Packaging: tape & reel for SMD; bulk/ammo for THT
• Compliance: RoHS, REACH, halogen-free

Typical Applications

• Consumer electronics and IoT nodes
• Industrial control and HMI boards
• Telecom modules and network devices
• Automotive electronics (non-safety, interior modules)
• Wearables and medical instrumentation (non-life critical)
• Development boards: reset, boot, user buttons

Electrical Specifications

• Contact arrangement: SPST-NO, single pole
• Electrical rating: 50 mA @ 12 VDC standard; 1–100 mA @ 3.3/5 V logic
• Contact resistance: ≤100 mΩ initial, ≤200 mΩ over life
• Insulation resistance: ≥100 MΩ @ 100 VDC
• Dielectric strength: 250 VAC for 1 minute
• Contact bounce: ≤5 ms typical
• ESD withstand (sealed models): ±8 kV air, ±4 kV contact

Mechanical Specifications

• Actuation travel: 0.25–0.5 mm
• Operating force options: 130 gf, 160 gf, 260 gf, 320 gf
• Release force: ≥30 gf
• Actuator styles: round or square; optional colored caps
• Lifecycle: 100,000 to 1,000,000 cycles (model dependent)
• Terminals: copper alloy, Sn or SnAgCu finish

Environmental Ratings

• Operating temperature: -40 to +85°C (up to +105°C optional)
• Storage temperature: -55 to +125°C
• Humidity: 0–95% RH, non-condensing
• IP rating: top-sealed washable; IP67 optional on sealed variants
• Vibration: 10–55 Hz, 1.5 mm p-p
• Mechanical shock: 100 g, 6 ms

Materials and Compliance

• Contacts: silver alloy or gold-plated dome (low-level signal options)
• Housing: high-temperature thermoplastic, UL94 V-0
• Actuator/cap: POM or PC
• Terminals: copper alloy, tin-plated
• Compliance: RoHS, REACH, halogen-free
• Lead-free solder compatibility: yes

Dimensions and PCB Footprints

• Common body sizes: 4.5×4.5 mm, 6×6 mm, 7×7 mm
• Heights: 1.5–7.0 mm options (low-profile to tall)
• Pin pitch: 3.5–5.0 mm
• SMD recommended pads (typical 6×6 body): 1.2×1.4 mm pads, 3.5 mm spacing; keepout around actuator ≥3.0 mm diameter
• THT hole size: 1.0 mm plated-through holes for 6×6 grid; hole-to-hole spacing per body size
• Clearance: ensure 7–10 mm vertical clearance if using caps or tall actuators

Mounting and Assembly

• SMT reflow profile: preheat 150–180°C for 60–120 s; peak 240–250°C ≤10 s; up to 3 reflow cycles
• Hand soldering: 350°C tip, ≤3 s per pin; avoid prolonged heat on actuator
• Wave soldering: suitable for THT versions; SMD not recommended
• Cleaning: use only on top-sealed/washable models; avoid solvent ingress; ultrasonic cleaning not recommended for unsealed
• Placement: pick-and-place with vacuum cap or pick-up tape; verify actuator free movement post-reflow

Electrical Integration

• Pin usage: two diagonally opposite pins are the switching contacts; remaining pins provide mechanical stability or redundant connection
• Debounce: implement RC or firmware debounce (5–20 ms typical)
• ESD protection: place TVS near MCU or route to chassis/ground; follow good grounding practices
• EMC: keep high-speed traces away from switch; provide ground pour under body where feasible

Options and Variants

• Mounting: SMD or THT
• Body sizes/heights: multiple footprints and profiles
• Operating force: 130/160/260/320 gf
• Contact plating: silver standard; gold for low-level signals
• Sealing: standard, top-sealed washable, IP67 sealed
• Actuator/caps: assorted colors, low/high profile, long-stem for panel-through PCB
• Metal frame or shielded versions for enhanced tactile feel

Quality and Testing

• Solderability per J-STD-002
• Moisture sensitivity level: MSL 1–3 (model dependent)
• Lifecycle tested to stated cycles
• Sampling tactile feel verification
• Packaging per EIA-481 (tape & reel)

Packaging

• SMD: tape & reel (7" or 13" reels; typical 2,000–4,000 pcs/reel)
• THT: bulk, ammo pack, or tray
• Marking: lot/date code for traceability

Ordering Information

• Series: PCB Tact Switch
• Mounting: SMD or THT
• Body size: 4.5 / 6.0 / 7.0 mm
• Height: specify 1.5–7.0 mm
• Operating force: 130 / 160 / 260 / 320 gf
• Contact finish: Ag or Au
• Sealing: standard / top-sealed / IP67
• Example part code: TSW-6x6-SMD-3.5H-260gf-TS-Au
• MOQ: SMD typically 3,000 pcs; THT typically 500 pcs (may vary by variant)

Lead Time and Warranty

• Lead time: 2–4 weeks standard; expedited options available
• Warranty: 12 months against manufacturing defects

Installation Notes and Best Practices

• Press actuator perpendicular; avoid side-loading to prevent premature wear
• Do not exceed electrical ratings; for higher currents use panel-grade pushbuttons
• Use caps to improve ergonomics and visibility
• Maintain adequate creepage/clearance to nearby high-voltage nets
• Observe ESD handling rules; store sealed models in dry-pack if specified
• Validate tactile feel and reflow profile on your actual PCB before mass production