In today’s rapidly advancing communication technology era, RF connectors are indispensable fundamental components in electronic devices and are becoming key factors in enhancing system performance and stability. The SMA (SubMiniature version A) cable end connector is a type of compact RF coaxial connector widely used in high-frequency signal transmission. Valued for its compact structure and reliable interface, it is favored across many industries. The KH-SMAJ-L SMA male pin cable end connector from Kinghelm combines excellent electrical performance with mechanical stability, making it ideal for applications demanding stringent RF transmission quality.

Kinghelm KH-SMAJ-L Product Image

As a flagship product in Kinghelm’s high-frequency connector series, the KH-SMAJ-L is designed for high-performance communication systems. The core function of an SMA cable end is to transmit RF signals steadily and with low loss between modules or devices. Its applications are extensive, covering wireless communications, navigation systems, radar systems, RF test instruments, data link modules, and antenna interfaces. For modern communication systems that require high signal integrity and low reflection loss, selecting a high-performance SMA cable end is crucial.

The KH-SMAJ-L SMA male cable-end connector features a standard 50±2 ohm characteristic impedance, enabling excellent impedance matching during connection. This minimizes signal reflection, power loss, and potential electromagnetic interference, decisively improving signal transmission stability and reliability in RF systems. Moreover, its frequency support range of 0–6 GHz fully meets the bandwidth requirements of current mainstream RF communication systems. Whether in traditional 2.4 GHz Wi-Fi, Bluetooth communication systems, or cutting-edge applications such as 5G, IoT, and high-speed data acquisition, KH-SMAJ-L delivers precise signal transmission support with ease.

Beyond electrical performance, the KH-SMAJ-L SMA male cable-end connector maintains a Voltage Standing Wave Ratio (VSWR) below 1.5, indicating low reflection coefficient and high transmission efficiency—especially suitable for systems sensitive to echo loss. Its voltage withstand capability of 500 V rms ensures safe operation under various working voltages, preventing damage or communication interruptions caused by voltage fluctuations. Additionally, with an operating temperature range from -45℃ to +80℃, it performs reliably in extreme cold or high-temperature environments, making it ideal for outdoor communication equipment, vehicle systems, and industrial automation control in demanding conditions.

Mechanically, the KH-SMAJ-L adopts the SMA standard male pin design, offering excellent mating durability and contact stability. Its tight and vibration-resistant structure ensures the connector remains secure and maintains performance even under long-term use or in vibrating environments. The housing is made of high-strength metal, providing outstanding interference resistance and oxidation protection, thereby ensuring stable signal shielding. Precision manufacturing not only enhances overall mechanical strength but also guarantees consistent product quality and longevity.

From a user experience perspective, the KH-SMAJ-L is packaged in bags, facilitating small-batch procurement and rapid integration in engineering projects. This packaging format is particularly convenient for pilot production, sample testing, or prototype design, allowing flexible on-site use and management. Weighing only 2.689 grams, its lightweight design makes it well-suited for portable terminals, miniaturized modules, and embedded systems, especially in space-constrained designs.

Kinghelm KH-SMAJ-L Specification

Overall, Kinghelm KH-SMAJ-L is a high-performance SMA cable end connector crafted for high-frequency signal applications. Combining excellent electrical performance, mechanical reliability, and environmental adaptability, its broad frequency range, precise impedance control, low VSWR, and robust voltage and temperature tolerance enable it to play a vital role in modern communication systems, smart devices, BeiDou navigation, RF testing, industrial automation, and many other fields. As a company focused on RF connection technology, Kinghelm demonstrates its manufacturing expertise and technical strength in high-frequency connectors through the KH-SMAJ-L, providing customers with stable and reliable RF connectivity solutions.

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-SMAJ-LTo Product Page