With the rapid advancement of intelligent connected technologies, automotive smart key systems have become a standard feature in modern vehicles, greatly enhancing user convenience and vehicle security. Compared to traditional mechanical keys, smart keys enable keyless entry, push-button start, and seamless information exchange with the vehicle—automatically unlocking, starting the engine, or remotely activating the air conditioning as the owner approaches. The stable and reliable RF signal transmission system behind these functions depends critically on key signal interface components such as the FAKRA RF connector.

Kinghelm KH-FK1-B-RM-208 Product Image

In this application, Kinghelm’s KH-FK1-B-RM-208 white 90° right-angle male FAKRA PCB connector provides robust support for signal transmission and reception in vehicle smart key systems. Featuring a PCB solder mount design, it offers flexible installation options suited for space-constrained PCB layouts. The connector conforms to FAKRA standards with a precise interface definition and a sturdy mechanical locking structure that effectively prevents contact failure and vibration loosening, ensuring long-term stable connections even in the harsh operating environments of vehicles. The white housing coding designates it as a dedicated interface type for smart key systems, guaranteeing accurate mating during assembly and improving overall vehicle electronic system reliability and assembly efficiency.

Performance-wise, the KH-FK1-B-RM-208 FAKRA RF connector supports a frequency range of 0 to 4 GHz with a nominal impedance of 50Ω. It delivers a maximum Voltage Standing Wave Ratio (VSWR) of 1.3 and insertion loss no greater than -0.3 dB, fully meeting the short-range RF communication requirements of smart key systems. The insulator is made of high-performance LCP engineering plastic, which is heat-resistant, flame-retardant, and anti-aging, allowing operation across a wide temperature range from -40°C to +105°C. The product has passed a 1000 VDC high-voltage test, demonstrating excellent electrical safety, and offers a mating durability of over 25 cycles, suitable for the entire vehicle lifecycle.

As a leading domestic provider of RF and connectivity solutions, Kinghelm has deep expertise in automotive-grade connectors. Its FAKRA series is widely applied in vehicle audio-video systems, navigation, T-BOX, rearview cameras, ETC, smart keys, tire pressure monitoring, and more. Through continuous improvements in materials, structure, and manufacturing processes, Kinghelm not only meets customer demands for high-frequency, high-reliability connections but also supports the automotive electronic architecture’s trend towards centralization and intelligence.

Kinghelm KH-FK1-B-RM-208 Specification

The KH-FK1-B-RM-208 is a key model in Kinghelm’s FAKRA lineup, with stable mass production and deployment in multiple smart key modules. It is recognized by many Tier 1 automotive manufacturers for its high consistency, low loss, and strong reliability. The connector is suitable not only for traditional internal combustion engine vehicles’ smart key systems but also meets the stringent wireless connection reliability and interference requirements of new energy vehicles. Looking ahead, as vehicles evolve toward greater intelligence, Kinghelm will continue innovating by launching smaller, higher-frequency, and more durable FAKRA connectors, empowering the upgrade of China’s automotive electronics industry.

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.

KH-FK1-B-RM-208To Product Page