In the era where electronic devices pursue slim profiles and intelligence, the reliability of human-machine interaction often hinges on minute components. The KH-12X12X8H-SMT tactile switch from Shenzhen Kinghelm Electronics Co., Ltd. exemplifies a micro control core engineered to redefine precision. This surface-mount technology (SMT) switch, with its compact 12×12×8mm dimensions and ultralight 1.3898g design, seamlessly integrates into high-speed automated production lines, delivering efficient and stable touch solutions for consumer electronics, home appliances, and industrial equipment.

Kinghelm KH-12X12X8H-SMT  Product Image

Electrical excellence originates from its rigorous contact design. The switch adopts a single-pole, single-throw (SPST) structure, with contact resistance strictly controlled below 100mΩ when tested at 1kHz/50mA/20mV, minimizing signal transmission loss. Its insulation performance is equally exceptional, exceeding 100MΩ under DC250V and withstanding AC250V at 50/60Hz for one minute without breakdown, establishing a robust safety barrier for device circuits. This electrical stability ensures long-term reliability across applications from household appliances to precision instruments.

Mechanical mastery delivers an unparalleled user experience. Featuring dual operating force specifications of 160±30gf or 260±50gf, combined with a precise 0.40±0.1mm travel distance and optimized tactility ratio of 30-70%, each press provides crisp, definitive haptic feedback. The silver-plated stainless steel spring undergoes specialized reinforcement, successfully passing 300g terminal deflection and 3kg knob tensile tests to ensure durability in high-frequency scenarios. During 100,000-cycle unloaded lifespan testing, contact resistance remains stable below 200mΩ while operating force variation stays within 30% of initial values, validating its extended service life.

Environmental resilience underscores industrial-grade quality. The switch maintains stable performance across storage temperatures ranging from -40℃ to 85℃ and operating temperatures spanning -20℃ to 70℃. It has rigorously passed extreme tests including salt spray corrosion testing at 5% concentration for 4-hour exposures, 80℃ thermal aging, 60℃/95% RH humidity exposure, -40℃ deep-freeze cycles, and temperature cycling. Post-testing, contact resistance remains ≤200mΩ, insulation resistance ≥100MΩ, and mechanical integrity stays uncompromised, proving reliability in harsh environments.

Manufacturing compatibility stands as a core advantage. Switch terminals achieve over 95% tin coverage after 260±5℃ solder bath immersion at 0.5mm depth for 3 seconds, and withstand both reflow soldering at 260±5℃ for 3 seconds and hand soldering at 350±5℃ for 3 seconds without deformation or electrical degradation. This seamless SMT integration enhances production efficiency while reducing costs. Its standardized 12×12mm footprint is widely adopted in space-constrained applications like TV control panels, microwave function keys, and rice cooker program switches, making it ideal for high-density PCB layouts.

To ensure optimal performance, adherence to three critical principles is essential: strictly control soldering parameters by following recommended SMT (260±5℃ for 3 seconds) or hand soldering (350±5℃ for 3 seconds) specifications to prevent thermal stress damage; avoid overloading during operation; and implement protective measures when deploying in corrosive gas environments.

Kinghelm KH-12X12X8H-SMT Specification

The Kinghelm KH-12X12X8H-SMT tactile switch redefines micro-switch standards through material innovation and full-spectrum reliability validation. Beyond executing circuit switching functions, it safeguards smart-device interaction experiences, delivering trusted tactile solutions that support evolving consumer electronics and Industry 4.0 transformation initiatives.

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.