Release date：2025-07-05Author source：KinghelmViews：4
In the rapidly evolving fields of wireless communications and the Internet of Things (IoT), stable transmission of RF signals is crucial. As the key bridge in signal channels, the quality of RF connectors directly impacts overall device performance. The KH-SMA-K513-20G from Kinghelm is a high-performance board-mount SMA female connector specially designed for high-frequency equipment and high-reliability systems, combining stability, ease of use, and robust mechanical strength.
Kinghelm KH-SMA-K513-20G Product Image
This connector features a standard 20-thread SMA threaded structure, ensuring standardized dimensions, firm connections, excellent vibration resistance, and frequency consistency. The board-end adopts a straight-leg through-hole design for quick soldering and easy installation, compatible with various PCB layouts, making it highly friendly for R&D and production. Compared to common bent-leg or non-standard pins, the KH-SMA-K513-20G effectively reduces installation errors and improves assembly efficiency.
Regarding materials, it uses a premium brass body with gold plating on the surface, greatly enhancing conductivity and corrosion resistance for long-term stable operation. The gold-plated contact surfaces reduce contact resistance and effectively prevent oxidation, making it more suitable for frequent mating cycles or use in high humidity and high-temperature environments compared to connectors plated with nickel or inferior alloys.
The insulation material inside the Kinghelm KH-SMA-K513-20G SMA female connector is PTFE, a high-frequency dielectric medium that exhibits low dielectric constant and low loss characteristics during high-frequency transmission, effectively suppressing signal interference and ensuring high-fidelity signal transmission. This meticulous design detail results in superior performance in high-frequency RF applications, significantly differentiating it from low-end SMA female connectors using ordinary plastic insulators.
The product weighs only 3.118 grams, lightweight and exquisite, with a compact yet sturdy overall structure. It is packaged as plug-in + bagged, facilitating small-batch sample testing and bulk material management. It is widely applicable to communication module manufacturers, security equipment producers, and automation control system integrators.
From an application perspective, the KH-SMA-K513-20G can be flexibly paired with various SMA male connectors for connecting Wi-Fi, Bluetooth antennas, GNSS Beidou positioning modules, 5G/4G LTE data terminals, as well as vehicle OBD interfaces, intelligent traffic terminals, and industrial sensors. In scenarios demanding high signal quality and reliability, this product provides a stable and reliable connection solution.
Among similar products, low-end SMA female connectors often suffer from coarse structures, large dimensional deviations, and poor contacts, causing loosening and serious signal attenuation. The KH-SMA-K513-20G comprehensively optimizes structural precision, soldering convenience, and signal consistency, achieving a good balance between cost control and performance — ideal for engineering projects seeking a win-win solution in quality and cost.
Kinghelm KH-SMA-K513-20G Specification
As a well-established brand in the RF connector field, Kinghelm has been deeply engaged in antennas, connectors, and signal transmission for years. With stable manufacturing capabilities and strict quality control, Kinghelm provides industrial-grade customers with numerous reliable products. The Kinghelm KH-SMA-K513-20G stands as a representative of its high-standard, highly compatible product lineup.
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.
