SMT Tact Switch 12x12 For Industrial Control

A robust, 12 × 12 mm surface‑mount tactile switch engineered for human–machine interfaces in industrial control systems. This SPST‑NO, momentary tact switch delivers a crisp, audible click with high operating force options to resist vibration‑induced actuation. Available in multiple heights and actuator styles, with sealed, washable variants for post‑reflow cleaning, it is suited to PLC panels, drives, instruments, and rugged operator consoles.

Key Features

• 12 × 12 mm low‑profile SMD package with optional locating posts for stable pick‑and‑place
• SPST‑NO, momentary action with sharp tactile feedback and low contact bounce
• Operating force options: 160 gf, 260 gf, 320 gf (±30 gf), supporting glove operation and anti‑false‑trigger
• Travel: 0.3 mm typical for precise, repeatable actuation
• Heights and actuators: flat top or extended stem; 4.3 / 5.0 / 7.3 / 9.5 mm body height options
• Long life: up to 500k cycles (force‑dependent)
• Electrical rating: 50 mA @ 12 VDC (signal level), low bounce and stable contact resistance
• Sealed/washable versions available for post‑reflow cleaning (non‑sealed models should not be washed)
• Operating temperature: −40 to +85°C (up to +105°C on request)
• Materials rated to UL 94V‑0; RoHS and REACH compliant; halogen‑free option

Typical Electrical Specifications

• Contact arrangement: SPST‑NO, momentary
• Rated load: 50 mA @ 12 VDC; also suitable for low‑level switching (e.g., 1 mA @ 5 VDC)
• Contact resistance: ≤100 mΩ (initial)
• Insulation resistance: ≥100 MΩ @ 100 VDC
• Dielectric strength: 250 VAC, 1 min
• Contact bounce: ≤5 ms (typical)

Typical Mechanical Specifications

• Operating force: 160 / 260 / 320 gf (±30 gf)
• Total travel: 0.25–0.5 mm (0.3 mm typical)
• Operating life: up to 500,000 cycles (lower forces achieve longer life; high forces up to ~200,000 cycles)
• Actuator options: flat, raised, or extended stem; compatible with snap‑on keycaps and light‑pipe solutions
• Mounting: surface‑mount gullwing terminals; optional PCB locating posts

Materials and Finish

• Housing/base: LCP or high‑temperature PA, UL 94V‑0
• Dome: stainless steel for crisp tactile response
• Plunger: PA66 or POM, wear‑resistant
• Terminals: copper alloy with nickel underplate and tin finish; optional gold‑over‑nickel contact plating
• Seal (sealed versions): silicone or elastomer

Environmental and Reliability

• Operating temperature: −40 to +85°C (extended to +105°C optional)
• Storage temperature: −40 to +85°C
• Humidity resistance: 96 h @ 40°C, 90–95% RH (no condensation), no functional damage
• Vibration (endurance): 10–55 Hz, 1.5 mm double amplitude, no contact failure
• Mechanical shock: 100 g, 6 ms, no contact failure
• Salt spray: 48 h, no critical corrosion affecting function (terminals may discolor)
• Cleaning: sealed models support standard aqueous cleaning; non‑sealed models must not be washed

Dimensions and Mounting (12 × 12 mm Series)

• Body footprint: 12 × 12 mm nominal
• Height options: 4.3 / 5.0 / 7.3 / 9.5 mm to suit panel stack‑up
• Recommended PCB land pattern: sized for gullwing terminations with solder‑mask‑defined pads; follow product drawing
• Keep‑out: maintain clearance around actuator to prevent cap or enclosure interference
• Reflow soldering: lead‑free per JEDEC J‑STD‑020; peak ≤260°C, ≤10 s above 255°C, preheat 150–200°C for 60–120 s; up to 2 reflow cycles
• Hand soldering: not recommended for SMD; if unavoidable, limit tip ≤350°C, <3 s contact, avoid force on actuator
• Post‑reflow: allow to cool to ambient before mechanical actuation

Quality and Compliance

• RoHS and REACH compliant; halogen‑free options available
• Flammability: plastic materials UL 94V‑0
• Manufacturing: ISO 9001 quality system; outgoing quality per ISO 2859‑1 (AQL sampling)

Packaging

• Tape & reel per EIA‑481 for automated placement
• Carrier tape width: 24 mm typical
• Reel diameter: 330 mm (13″)
• Quantity: ~400 pcs/reel typical (varies with height/actuator)

Applications

• PLC and HMI operator panels, VFDs, motor drives
• Industrial instruments and data acquisition
• Test and measurement equipment
• Building automation and security panels
• Rugged handhelds, service tools, and control keypads

Ordering Information

• Base series: SMT Tact Switch 12×12
• Force codes: 16 = 160 gf, 26 = 260 gf, 32 = 320 gf
• Height codes: 43 = 4.3 mm, 50 = 5.0 mm, 73 = 7.3 mm, 95 = 9.5 mm
• Actuator: F = flat, E = extended
• Seal: S = sealed/washable, N = non‑sealed
• Contact plating: T = tin standard, G = gold contact
• Example: 12×12‑SMT‑26‑73‑S‑F‑T → 260 gf, 7.3 mm, sealed, flat actuator, tin terminations

Design Notes

• Debounce in firmware for 5–10 ms to account for mechanical bounce and EMI
• Choose higher operating force for high‑vibration environments or glove use
• Use caps with appropriate travel allowance; avoid side loads on the actuator
• For illuminated panels, pair with light pipes or backlighting adjacent to the switch (no internal LED)
• Do not wash non‑sealed models; for sealed models, verify cleaning chemistry compatibility
• Avoid continuous static loads on the actuator; switch is intended for momentary operation only

Note: Specifications are typical and may vary by exact part number and options. Request the detailed product drawing and test report for your selected configuration before design freeze.