Within the slim profiles of wearable devices and on the compact circuit boards of medical electronics, every millimeter carries the weight of innovation. Shenzhen Kinghelm Electronics Co., Ltd. introduces the revolutionary KH-4.5X4.5X5H-STM tactile switch, a 4.5×4.5×5mm micro-component featuring gull-wing leads and surface-mount design that redefines interaction boundaries in space-constrained electronics.

Kinghelm KH-4.5X4.5X5H-STM Product Image

Engineering Excellence at Micro Scale
Where conventional switches prove bulky, the KH-4.5X4.5X5H-STM delivers breakthrough compactness. Its 4.5mm² footprint reduces PCB occupation by 43% versus standard 6mm switches, freeing vital space for batteries or sensors in smartwatches and medical devices. The precisely engineered 5mm height ensures 0.25mm operational travel while maintaining compatibility with ultra-thin form factors. The matte-finished black circular button resists fingerprints and complements modern aesthetics. Crucially, its gull-wing leads achieve ≤0.1mm coplanarity (per JESD22-B108), enabling 99.8% automated placement yield.

Reliability Engineered into Miniature Form
Miniaturization never compromises performance in Kinghelm's design. The single-pole-single-throw (SPST) structure guarantees interference-free signal transmission. Hardened gold-plated copper alloy contacts maintain stable resistance below 100mΩ at 50mA loads. The UL94 V-0 rated PC housing ensures consistent electrical performance across -25°C to 70°C environments. Validation testing confirms less than 10% contact resistance variance after 50,000 actuations at 120 presses/minute.

The Science of Tactile Perfection
Balancing actuation force and feedback is an art. Through 2,000 pressure-curve analyses, Kinghelm calibrated the optimal 280±30gf actuation force - ergonomically proven to reduce operator fatigue by 15% versus market alternatives. The 3mm diameter button delivers definitive two-stage tactile feedback through its precise 0.25mm travel, enabling reliable blind operation in medical emergencies. Robust 8kV ESD protection (IEC 61000-4-2 compliant) safeguards sensitive circuits.

Transforming Compact Applications
Real-world implementations demonstrate exceptional versatility: Smart ring manufacturers gain 22% battery capacity; EU-certified insulin pumps pass YY 9706.102 EMC tests; industrial sensors achieve 100% cold-start success at -40°C. These cases confirm superior performance in wearables, medical devices, and IoT modules. When subjected to 48-hour salt spray testing, TWS earphone case switches emerge corrosion-free.

Kinghelm KH-4.5X4.5X5H-STM Specification

Quality as Foundation
Kinghelm implements full lifecycle quality control: XRF spectrometry verifies ≥1.5μm gold plating (IPC-4552B); pre-SMT 3D SPI inspection; 100% insulation resistance testing (>100MΩ at 500VDC); and periodic 85°C/85%RH damp-heat aging. Engineers should note: Lead-free reflow soldering at ≤260°C peak temperature for <8 seconds is recommended, with ketone solvents avoided to preserve material integrity.

Certified to IATF16949 automotive standards, Kinghelm's KH-4.5X4.5X5H-STM has become the core interface component in compact electronics. Deployed in medical monitoring equipment across 17 countries with over 30 million units delivered, it maintains a field failure rate below 50 PPM. We continue pioneering miniaturization and waterproofing technologies, empowering global innovation within millimeter-scale constraints.

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.