In an era where electronic devices are accelerating towards miniaturization and integration, every millimeter of space optimization signifies a leap in product competitiveness. The Kinghelm KH-12X12X7H-SMT tactile switch launched by Kinghelm® redefines the space efficiency of surface-mount switches with its industry-leading height of only 7mm and ultra-lightweight design of 1.355 grams. This 12×12mm micro switch, optimized for SMT processes, seamlessly adapts to high-speed placement production lines through tape packaging, providing high-density touch solutions for consumer electronics, smart wearables, and portable medical devices.

Kinghelm KH-12X12X7H-SMT Product Image

Precise control of electrical performance is the core gene of the Kinghelm KH-12X12X7H-SMT. The switch adopts a single-pole single-throw (SPST) contact structure, with the contact resistance strictly controlled at ≤100mΩ (test conditions: 1kHz/50mA/20mV), significantly reducing signal transmission loss. Its insulation barrier is equally excellent, with an insulation resistance of ≥100MΩ at DC250V and resistance to AC250V (50/60Hz) for one minute without breakdown, providing reliable protection for high-sensitivity circuits. This combination of milliohm-level contact stability and megaohm-level insulation strength ensures the long-term and reliable operation of precision equipment from smart watches to micro drones.

The scientific adjustment of the mechanical structure endows the product with a differentiated experience. The switch offers dual specifications of operating force options: 160±30gf and 260±50gf, combined with a precise stroke of 0.40±0.1mm and 30-70% optimized tactile value, achieving clear and definite tactile feedback. The stainless steel silver-plated reed undergoes nano-level surface treatment, successfully passing the 300g terminal deflection test and 3kg handle tension verification, providing structural guarantee for millions of pressing scenarios. After 100,000 times of no-load life testing (100-120 times/minute), the contact resistance remains stable at ≤200mΩ, and the operating force deviation is ≤30% of the initial value, confirming its ultra-long service cycle.

Extreme environmental adaptability is verified through industry-level rigorous tests. The switch shows no performance attenuation within the storage temperature range of -40℃ to 85℃ and the operating temperature range of -20℃ to 70℃, and has passed a full set of reliability tests such as salt spray corrosion (5% concentration/4 hours), 80℃ high-temperature aging, 60℃/95%RH high humidity, -40℃ deep cold, and temperature cycle (5 cycles). After 96 hours of continuous environmental stress, the structural integrity retention rate of contact resistance ≤200mΩ and insulation resistance ≥100MΩ exceeds 99%, meeting the extreme requirements of outdoor equipment and industrial control scenarios.

Intelligent manufacturing compatibility is reflected in process details. The terminals have a tin coverage rate of >95% after being immersed in a 260±5℃ tin furnace (0.5mm deep/3s), compatible with reflow soldering (260±5℃/3s) and manual soldering (350±5℃/3s) processes. The anti-deformation design of the body eliminates production-end failures. Its 12×12×7mm ultra-thin package reduces the height by 12.5% compared with the previous generation product, releasing layout freedom for space-sensitive applications such as TWS earphone charging case buttons and ultra-thin remote control panels, while reducing the overall structure thickness of the machine.

To ensure optimal performance, three key guidelines must be followed: strictly control the temperature and time window during welding (SMT recommends 260±5℃/3s, manual welding 350±5℃/3s) to avoid reed deformation caused by thermal stress; strictly prohibit exceeding the rated mechanical load during operation; in corrosive gas environments such as hydrogen sulfide, it is recommended to adopt a sealed protection design. These measures will maximize the service life of the switch.

Kinghelm KH-12X12X7H-SMT Specification

The Kinghelm KH-12X12X7H-SMT tactile switch sets a new benchmark for ultra-thin SMT switches with material engineering innovation and space efficiency breakthroughs. It is not only an executive unit for current on-off, but also a key driver for the miniaturization of wearable devices and the precision of medical equipment, continuously providing a trustworthy touch cornerstone for high-density electronic design.

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.