In RF and video signal transmission systems, connectors often go unnoticed but play a critical role in maintaining reliable signal flow. Whether the signal enters a device from the outside or is transmitted from internal circuits, the connector ensures stable electrical continuity. Board-end BNC coaxial connectors, such as Kinghelm KH-BNC75-3511, are commonly used to bridge external coaxial signals with internal circuit boards, providing a stable interface within a compact design.

Kinghelm KH-BNC75-3511 is a board-mounted BNC coaxial connector with a 75Ω impedance, suitable for applications requiring consistent signal matching. Its through-panel design allows external coaxial cables to connect directly to internal circuits, creating a clear and reliable signal path. This type of connector is commonly found in instrumentation, video equipment, and signal interface modules.

Kinghelm KH-BNC75-3511 Product Image

Material and Structural Considerations
The connector body is made of zinc alloy, a material widely used in RF connectors for its balance of mechanical strength and ease of manufacturing. This ensures stable performance even under frequent insertion or mounting stress. The white insulating plastic housing provides electrical isolation while maintaining structural support, making it easier to organize and identify interfaces within the device.

Interface Specifications and Compatibility
KH-BNC75-3511 features a female interface with an approximate 9.5mm diameter, compatible with standard BNC plugs. The single-port design makes it suitable for independent signal channels and helps reduce interface confusion in multi-channel systems. Its right-angle design offers layout flexibility, minimizing cable bending stress and allowing more efficient use of space on compact boards.

Electrical Performance and Frequency Range
With a 75Ω impedance rating, the connector supports applications where impedance matching is important, helping to reduce signal reflection and maintain transmission stability. Its operating frequency extends up to 3GHz, accommodating a wide range of RF and video signal applications and offering flexibility in system design.

Environmental Adaptability
The working temperature range of -55°C to +155°C enables stable performance across diverse environmental conditions. This adaptability ensures the connector can maintain structural and electrical integrity in varying operational environments, including industrial equipment and testing systems.

Installation and Packaging
KH-BNC75-3511 is designed for board-mounted soldering and through-panel connection, providing clear separation between internal circuitry and external signal interfaces. The connector comes in tray packaging, suitable for batch storage and organized assembly.

Kinghelm KH-BNC75-3511 Specification

Overall, KH-BNC75-3511 focuses on practical performance rather than complex or niche applications. As part of the Kinghelm RF connector series, it emphasizes stability, compatibility, and reliable long-term use in board-end BNC applications. When installed properly, it integrates naturally into RF and video signal transmission systems, reflecting Kinghelm’s commitment to practical design and attention to detail in RF connectivity.

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.