Belling Lee Limited, founded in 1926, is a prestigious British manufacturer of electronic connectors and components, headquartered in Enfield, United Kingdom. The company gained early recognition for pioneering high-quality RF and coaxial connectors used in television and radio systems. Its core business today encompasses a broad portfolio of interconnection products, including RF connectors, circular connectors, EMI/RFI filters, and surge protection devices. Key product families include the L-Series circular connectors, widely adopted BNC and TNC coaxial connectors, and an extensive line of filtered connectors for electromagnetic interference suppression. The company also offers specialized items such as high-voltage connectors, test accessories, and custom-engineered solutions for demanding environments. Belling Lee serves diverse markets like broadcast, telecommunications, aerospace, defense, medical electronics, and industrial automation. Its products are known for robust design, precision engineering, and compliance with international standards such as MIL-SPEC and IEC. With a rich history of innovation, the firm holds numerous patents in connector technology and continues to develop advanced locking mechanisms and high-frequency solutions. In 2000, Belling Lee became part of the LEMO Group, a Swiss leader in high-performance connectors, bolstering its global presence while maintaining the Belling Lee brand identity. Although niche, Belling Lee remains a respected name in RF and connector markets, renowned for over 90 years of reliability and technical expertise.