SMT Button For DIY Electronics

A compact, low-profile surface-mount tactile push button designed for maker projects, prototyping, and small-scale production. This momentary SMD switch delivers crisp tactile feedback, reliable contacts, and easy integration with microcontrollers and development boards. Ideal for Arduino, Raspberry Pi, wearables, robotics, and IoT builds.

Key Features

• Momentary action with clear tactile “click”
• Surface-mount design for automated assembly (reflow compatible)
• Multiple operating force options for different feel preferences
• Low-profile heights suitable for slim enclosures
• Long mechanical life and stable contact performance
• RoHS compliant and lead-free
• Available caps in assorted colors for user interface differentiation
• Supplied in tape-and-reel for pick-and-place

Typical Specifications

• Type: SMD tactile push button (momentary, normally open)
• Rated voltage/current: 12 VDC, 50–100 mA (typical)
• Contact resistance: ≤100 mΩ (initial)
• Insulation resistance: ≥100 MΩ at 100 VDC
• Dielectric strength: 250 VAC for 1 minute
• Travel: 0.2–0.25 mm (typical)
• Operating force options: 160 gf, 260 gf, 320 gf (±20%)
• Bounce time: ≤10 ms
• Mechanical life: up to 1,000,000 actuations (force-dependent)
• Operating temperature: −20°C to +70°C (extended variants to −40°C to +85°C)
• Storage temperature: −40°C to +85°C
• Materials: copper alloy terminals with Ag/Sn plating; POM actuator; stainless steel dome
• Moisture sensitivity: MSL 1 (not moisture sensitive)
• Soldering: reflow peak 245–255°C (≤10 s at peak), hand solder 350°C for ≤3 s

Size Variants

• Square: 4.5 × 4.5 mm footprint, heights from 1.5 to 7.0 mm
• Rectangular: 3.0 × 6.0 mm footprint, low-profile options
• Other footprints available on request (check exact part number)

Recommended PCB Land Pattern

• Maintain solder pad clearances to prevent solder bridging
• Allow keep-out around actuator to avoid interference with enclosures
• Follow manufacturer reflow profile; avoid excessive thermal shock

Applications

• DIY electronics and maker projects
• User interface buttons on embedded devices
• Wearables and portable gadgets
• Robotics controllers and testers
• IoT nodes and smart home modules
• Consumer prototypes and small-batch production

How to Use

• Connect one terminal to ground and the other to a GPIO with an internal or external pull-up resistor
• Debounce in firmware (simple delay or state machine; 5–20 ms typical)
• Avoid side loading the actuator; press vertically for best life
• Do not flood-clean with solvents; use controlled cleaning processes

Quality and Compliance

• RoHS compliant, halogen-free
• REACH SVHC-free (based on supplier declaration)
• 100% visual inspection; electrical spot checks per batch

Packaging and MOQ

• Tape-and-reel: 8 mm tape, 4,000 pcs per reel (typical)
• Sample packs available for prototyping
• Minimum order quantity varies by variant; contact for details

Ordering Options

• Footprint: 4.5×4.5 mm or 3×6 mm
• Actuator height: 1.5 / 2.0 / 2.5 / 3.0 / 4.3 / 7.0 mm
• Operating force: 160 / 260 / 320 gf
• Plating: silver standard; gold plating on request for low-level signals
• Cap color: black, white, red, blue, yellow (optional snap-on caps)
• Packaging: tape-and-reel or cut tape

Notes and Best Practices

• Use proper reflow profile; pre-bake not required for MSL 1
• Keep flux away from the actuator to prevent sticky feel
• If mounting under a panel, ensure clearance so the cap or actuator can move freely
• For outdoor or high-humidity use, consider sealed switches instead

Simple Wiring Example

• Button terminal A to GND
• Button terminal B to microcontroller input with internal pull-up enabled
• In code, detect LOW when pressed; implement 10–20 ms debounce

FAQ

• Is it latching? No, it is momentary (press to connect).
• Can I hand-solder it? Yes, with care; avoid overheating and apply minimal lateral force.
• Is it waterproof? No; use sealed IP-rated switches for harsh environments.
• Does it work with 3.3 V logic? Yes; the button is passive and works with any logic level.

Included in the Box

• SMT tactile switch(es) as per selected variant
• Optional snap-on caps if ordered