In the realm of electronics where precision and reliability are paramount, every micro-component’s performance is critical. Shenzhen Kinghelm Electronics Co., Ltd. leverages its extensive expertise in electronic component R&D and manufacturing to present the KH-12X12X4.5H-SMT-D Tactile Switch. Engineered for modern electronic devices, this surface-mount technology (SMT) switch delivers exceptional performance, compact design, and outstanding durability, making it the preferred choice for engineers and designers across diverse industries. 

Kinghelm KH-12X12X4.5H-SMT-D Product Image

Core Design Philosophy

The Kinghelm KH-12X12X4.5H-SMT-D embodies a dual focus on high reliability and spatial efficiency. Its nomenclature reflects key physical attributes: a 12×12mm base and a 4.5mm ultra-low profile, enabling seamless integration into high-density PCB layouts—ideal for space-constrained electronics. Designed for SMT processes, it ensures effortless compatibility with automated assembly lines, enhancing production efficiency and consistency for large-scale manufacturing.

Premium Materials & Construction

Oxidation-Resistant Cover: Precision copper-tin plating

Actuator: Robust black PPA (Polyphthalamide)

Contact Mechanism: Cleaned silver-plated stainless steel spring
       Each material undergoes rigorous selection to guarantee long-term stability and performance. Optimized                     actuation force delivers tactile feedback with moderate pressure, ensuring reliable user interaction.

Electrical Performance

Contact Resistance: ≤100mΩ (tested at 1kHz, 50mA, 20mV)

Insulation Resistance: ≥100MΩ (DC 250V)

Withstand Voltage: AC 250V (50/60Hz, 1mA leakage current, 1 minute)
           These parameters ensure signal integrity and circuit safety under demanding conditions.

Mechanical Robustness

Actuation Force: 160±30gf / 260±50gf

Travel Distance: 0.40±0.1mm

Structural Integrity:

Terminals withstand 300gf lateral static load (1 minute)

Actuator tolerates 3kg vertical pull force

Validated for stability in high-vibration environments.

Endurance & Environmental Reliability
     Mechanical Life: 100,000 cycles (no load, 100–120
           cycles/minute)

Post-test contact resistance: ≤200mΩ

Actuation force drift: ≤±30%

Environmental Validation:

Salt spray: 5±1% NaCl, 35±2°C, 4 hours

Temperature/Humidity:

High temp: 80±2°C, 96hr

Damp heat: 60±2°C/90–95% RH, 96hr

Low temp: -40±2°C, 96hr

Thermal cycling: -40°C ↔ 85°C
No performance degradation observed post-testing.

Kinghelm KH-12X12X4.5H-SMT-D Specification

Solderability & Assembly

Solder Coverage: ≥95% (dipped at 260±5°C, 0.5mm depth, 3s)

Reflow Compatibility: 260±5°C, 3±0.5s (simulated 1.6mm PCB)

Hand Soldering: 350±5°C, ≤3s (avoid mechanical stress)
Maintains structural integrity and electrical stability post-soldering.

Applications

Widely deployed in:

Automotive: In-car audio controls, A/C panels, lighting switches

Industrial: PLC interfaces, instrumentation panels

Consumer Electronics: Smart home remotes, security devices,            

compact appliances

Critical Usage Guidelines

Soldering:

Reflow: ≤260±5°C, ≤3s

Hand soldering: ≤350±5°C, ≤3s
Avoid thermal stress to prevent deformation.

Operational Limits:

Maximum load: DC 12V/50mA

Avoid lateral forces >1.5N

Hostile Environments:

Implement protective measures if exposed to corrosive gases.

Quality Assurance

100% AOI (Automated Optical Inspection)

Contact resistance/insulation resistance batch testing

500VAC dielectric strength validation

Conclusion

The Kinghelm KH-12X12X4.5H-SMT-D Tactile Switch merges miniaturization with industrial-grade resilience. Its SMT design streamlines production, while validated electrical, mechanical, and environmental performance ensures dependable operation in critical applications. Choosing Kinghelm embodies a commitment to quality—delivering reliability at your fingertips.

About Kinghelm

Shenzhen Kinghelm Electronics Co., Ltd.（www.kinghelm.net）has technical backbones from Tsinghua University and UESTC, and has introduced overseas returnee professionals. Kinghelm is able to develop highly reliable and high-performance antenna and connector products.KH series products of "Kinghelm" brand include Beidou/GPS antennas, RF adapter connectors, plug connector, electrical data connectors, terminals, and customized vehicle harnesses, industrial / medical connectors, and special antenna connectors."Kinghelm connects world", Kinghelm has grown with the development of China's Beidou industry. Starting from supplying Beidou/GPS dual mode antennas, IPEX terminals, and RF adapter cables for automotive manufacturers, Kinghelm has continuously developed products. Currently, it has a series of WiFi, Bluetooth, NB-loT, LoRa, Zigbee, UWB, and GSM antennas, RFID tags, RF adapter cables, standard microwave antennas, vehicle grade SMA, SMB, FAKRA holders, coaxial cables, and can customize non-standard antenna connectors based on customer drawings or samples.