Surface Mount Tact Switch 3×4×2.5mm — TS-1185T4 SMD 2-Pin Mini Tactile Push Button for Consumer Electronics, IoT & Wearables
The TS-1185T4 is a surface mount tact switch 3×4×2.5mm — a compact SMD 2-pin mini tactile push button with ultra-low profile design. Rated 50mA 12V DC, 160gf/260gf operating force, 100,000 mechanical cycles. Perfect for space-constrained PCB layouts in consumer electronics, IoT devices, and wearables. RoHS 3 & REACH compliant. Tape & reel packaging. MOQ 1,000 pcs. Free sample available.
Surface Mount Tact Switch 3×4×2.5mm — Product Overview
The TS-1185T4 is a surface mount tact switch 3×4×2.5mm — an ultra-compact SMD 2-pin mini tactile push button engineered for high-density PCB applications where space is at a premium. Manufactured by Vistar Electronics, this is the ideal SMD tactile switch solution for modern consumer electronics, IoT devices, wearables, remote controls, and portable gadgets requiring reliable momentary contact switching in a miniature form factor.
With dimensions of just 3mm × 4mm × 2.5mm height, this 3x4mm tact switch 2 pin surface mount occupies minimal PCB real estate while delivering consistent tactile feedback and long operational life. The gull-wing SMT termination enables automated pick-and-place assembly, making it perfect for high-volume production environments. The 2.5mm actuator height strikes an optimal balance between low-profile design and comfortable actuation, ensuring reliable user interaction in slim device enclosures.
The mini tactile push button switch SMT features a momentary SPST (Single Pole Single Throw) normally-open contact configuration. When pressed, the conductive dome collapses to complete the circuit; upon release, the dome springs back to its original position, breaking the connection. This simple yet reliable mechanism has made tact switches the dominant human-machine interface component across the electronics industry.
Available in two standard operating force options — 160gf (light touch) and 260gf (standard touch) — this tact switch accommodates different user experience requirements. The lighter 160gf variant is ideal for frequent-use applications where finger fatigue is a concern, while the 260gf option provides more definitive tactile confirmation for industrial and automotive applications.
All connectors are manufactured in Vistar Electronics’ ISO 9001:2015 certified facility in Pingshan District, Shenzhen, China, and comply with RoHS 3 (EU Directive 2015/863) and REACH SVHC regulations.
SMD Tactile Switch — Full Technical Specifications
| Parameter | Value | Notes |
|---|---|---|
| Part Number | TS-1185T4 | Standard catalog item |
| Product Type | Mini Tactile Push Button Switch | Momentary action, SPST-NO |
| Mounting Type | Surface Mount Device (SMD) | Gull-wing termination |
| Dimensions (L×W×H) | 3.0mm × 4.0mm × 2.5mm | Ultra-compact footprint |
| Pin Count | 2 Pins | SPST normally open |
| Rated Voltage | 12V DC | Maximum operating voltage |
| Rated Current | 50mA | Maximum switching current |
| Operating Force | 160gf / 260gf | Optional, ±30gf tolerance |
| Actuator Travel | 0.20 – 0.30mm | Tactile feedback range |
| Contact Resistance | ≤ 100mΩ (Initial) | Low resistance connection |
| Insulation Resistance | ≥ 100MΩ at 100V DC | Excellent isolation | Dielectric Strength | 250V AC for 1 minute | High voltage withstand |
| Mechanical Life | 100,000 cycles | Standard durability rating |
| Electrical Life | 50,000 cycles | Under rated load |
| Contact Material | Phosphor Bronze, Silver Plated | Low, stable contact resistance |
| Actuator Material | High-Temperature Nylon | Heat resistant, durable |
| Base Material | High-Temperature LCP | Reflow soldering compatible |
| Operating Temperature | −25°C to +70°C | Commercial grade |
| Storage Temperature | −30°C to +85°C | Extended storage range |
| Reflow Soldering | Compatible | 260°C max for 10 seconds |
| Packaging | Tape & Reel | 4,000 pcs per reel |
| Application | Consumer / IoT / Wearables / Remote Controls | Space-constrained designs |
| Compliance | RoHS 3, REACH SVHC | EU & global export ready |
| Certification | ISO 9001:2015 | Factory quality management |
Why Engineers Choose the 3x4mm Tact Switch 2 Pin Surface Mount for Compact Designs
Ultra-Compact 3×4×2.5mm Footprint — Maximum PCB Space Savings
The compact SMD tact switch 160gf 260gf measures just 3mm × 4mm × 2.5mm, making it one of the smallest standard tactile switches available. This ultra-miniature footprint enables designers to create thinner, lighter products without sacrificing user interface functionality. Ideal for smartphones, smartwatches, fitness trackers, TWS earbuds charging cases, and other portable devices where every millimeter counts.
SMT Gull-Wing Termination — Automated Assembly Ready
The gull-wing surface mount termination is fully compatible with standard SMT reflow soldering processes and automated pick-and-place equipment. Tape-and-reel packaging (4,000 pieces per reel) supports high-speed production lines, reducing assembly costs and improving manufacturing consistency. The 2-pin configuration simplifies PCB routing and reduces solder joint complexity compared to 4-pin alternatives.
Dual Operating Force Options — Customizable User Experience
Choose between 160gf (light touch) for applications requiring frequent actuation with minimal finger fatigue, or 260gf (standard touch) for applications demanding more definitive tactile confirmation. Both variants deliver crisp, consistent tactile feedback with 0.20–0.30mm actuator travel, ensuring reliable operation across the product lifecycle.
RoHS 3 & REACH Compliant — Globally Export Ready
Fully compliant with RoHS 3 (EU Directive 2015/863) and REACH SVHC substance regulations. RoHS declarations of conformity and REACH SVHC substance statements available on request for EU CE marking, supply chain qualification audits, and customer documentation programs — ready for all major regulated global export markets.
Where to Use the Mini Tactile Push Button Switch SMT — Applications for Consumer Electronics, IoT & Wearables
Surface Mount Tact Switch 3×4×2.5mm — Frequently Asked Questions
What is the difference between 160gf and 260gf operating force options?
The 160gf (gram-force) variant requires a lighter touch to actuate, making it ideal for applications where users will press the button frequently or where a softer touch is preferred — such as consumer electronics, wearables, and medical devices. The 260gf variant requires a firmer press, providing more definitive tactile feedback and reducing accidental actuation — preferred for industrial controls, automotive applications, and outdoor equipment. Both options maintain the same 0.20–0.30mm travel distance and 100,000-cycle mechanical life rating.
Can the tact switch be used with lead-free reflow soldering processes?
Yes, this tact switch is fully compatible with standard lead-free (Pb-free) reflow soldering profiles. The high-temperature LCP (Liquid Crystal Polymer) base material and heat-resistant nylon actuator can withstand peak reflow temperatures up to 260°C for 10 seconds, meeting IPC/JEDEC J-STD-020 requirements. Recommended reflow profile: preheat 150–180°C for 60–120 seconds, peak 245–260°C, cooling rate 2–4°C/second. Hand soldering is also possible with a 350°C iron tip for no more than 3 seconds per terminal.
How does this tact switch compare to other Vistar tactile switches?
Vistar offers a comprehensive range of tactile switches to suit different application requirements:
- (this product): 3×4×2.5mm, 2-pin SMD, ultra-compact — ideal for wearables and space-constrained designs
- TC-3602: 3×6×2.5mm, 2-pin SMD — slightly longer body for improved stability, same height profile
- TC-4402: 4×4×1.5mm, 4-pin SMD — lower profile option with additional mounting stability from 4 pins
- TC-6608: 6×6×4.3mm, 2-pin DIP — through-hole option for applications requiring maximum mechanical strength
- TC-6610: 6×6×5.0mm, 4-pin DIP — standard through-hole tact switch for industrial applications
Choose this tact switch when the smallest possible SMD footprint is the primary design requirement.
What is the MOQ and can I get a free sample?
Standard MOQ is 1,000 pieces with a 2–4 week production lead time. Free samples are available for qualified engineering and product development projects. Contact sales@vistarelectronics.com with your company details, project application, and part number, or click the “Get a Quote” button at the top of this page. Sample kits including both 160gf and 260gf variants are available for evaluation.
Is the tact switch suitable for outdoor or harsh environment applications?
The standard tact switch is designed for indoor consumer electronics applications with an operating temperature range of -25°C to +70°C. While it offers reliable performance in typical consumer environments, it does not carry an IP rating for dust or water resistance. For outdoor, industrial, or harsh environment applications requiring ingress protection, Vistar offers the -W waterproof variant with IP67 rating, or the TC-4402-WS sealed series. Contact our sales team to discuss your specific environmental requirements.
Related Products & Resources
- Vistar Full Tactile Switch Product Line — Browse all SMD and DIP tact switch options
- 4×4mm SMD Tact Switch TC-4402 — Lower profile 1.5mm height option with 4-pin stability
- TE Connectivity Tactile Switches Technical Guide — Industry-standard tactile switch application notes (external)
- E-Switch Tactile Switch Selection Guide — Comprehensive tact switch technical resources (external)
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