In today’s era of highly integrated electronic devices, every millimeter of space is precious, and every touch impacts user experience. Shenzhen Kinghelm Electronics Co., Ltd. understands this profoundly. The KH-12X12X4.5H-SMT Tactile Switch, with its ultra-compact 12mm × 12mm × 4.5mm footprint, combines precision engineering and reliable performance to become the core touch-control solution for consumer electronics, smart appliances, and industrial control systems. Optimized for Surface Mount Technology (SMT), this switch not only streamlines automated production but also redefines touch reliability through rigorous industrial standards.

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

Precision Engineering, Unshakable Foundation

The KH-12X12X4.5H-SMT adopts a four-pin SMD structure, featuring robust solder pads that ensure precise alignment on high-speed SMT lines while resisting PCB thermal stress. Its core components include a button and base molded from high-quality PPA engineering plastic, paired with a silver-plated stainless steel contact spring for millions of stable activations. The top copper-tin-plated iron cover provides rugged protection. The entire structure withstands harsh reflow soldering at 260±5°C for 3 seconds without deformation or performance degradation, ensuring mass-production consistency.

Superior Performance, Precise Response

Electrical performance defines the switch’s soul. Under 1kHz/20mV test conditions, contact resistance remains ≤100mΩ, ensuring efficient signal transmission with minimal loss. Insulation resistance ≥100MΩ (tested at DC 250V) builds a safety barrier, while withstand voltage up to AC 250V for 1 minute without breakdown meets stringent safety regulations. Its standard operating rating of DC 12V/50mA precisely adapts to low-voltage control circuits.

Tactile experience is equally refined. Operating force offers two options (160±30gf or 260±50gf), paired with a precise 0.40±0.1mm travel, delivering crisp haptic feedback. Rapid rebound and tactility strictly controlled within the 30%-70% optimal range ensure comfortable and reliable actuation. Mechanical endurance excels—surviving 100,000 presses at 100-120 cycles/minute (no load), with end-of-life contact resistance ≤200mΩ and actuation force variation <30%, far exceeding industry standards.

Fearless Challenge, All-Round Adaptability

True reliability withstands extreme environments. The KH-12X12X4.5H-SMT maintains electrical integrity after 4 hours in 5% salt spray; endures 96-hour storage from -40°C deep freeze to 80°C heat without performance drift; and passes 5 temperature cycles (-40°C ↔ 85°C) and 60°C/95% RH humidity tests, proving all-weather capability. Its broad -20°C to 70°C operating range effortlessly handles applications from household appliances to outdoor equipment.

Efficient Integration, Versatile Empowerment

As a natural partner for SMT processes, its tape-and-reel packaging seamlessly integrates with high-speed pick-and-place machines, boosting production efficiency. Excellent solderability (≥95% coverage after 3s at 260±5°C) ensures mass-production yield. From TV remote controls and microwave mode switches to rice cooker timers and industrial panel operations, the KH-12X12X4.5H-SMT is deeply embedded in modern electronics—serving as the silent backbone for power switching, mode selection, and parameter adjustment.

Kinghelm KH-12X12X4.5H-SMT Specification

Conclusion
The Kinghelm KH-12X12X4.5H-SMT Tactile Switch crystallizes miniaturized design and industrial-grade reliability. With milliohm-level contact resistance, 100,000-cycle lifespan, cross-climate adaptability, and SMT-line efficiency, it infuses smart devices with trustworthy touch control. Choosing Kinghelm® isn’t just selecting a switch—it’s embracing an endless pursuit of quality, where every fingertip touch becomes a perfect fusion of technology and humanity.

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.