Hong Kong - Media OutReach Newswire - March 5, 2026 - Southco has introduced a new heavy-duty rotary latch, the R4-50, featuring a dual-trigger design aimed at enhancing the reliability and robustness of heavy equipment in harsh environments.

The R4-50 Heavy-Duty Rotary Latch delivers heavy-duty performance for modern machinery, effectively addressing challenges such as vibration, accidental release risks, and entry/exit delays. It is particularly suitable for applications like construction and agricultural vehicles.

Designed for demanding conditions, this latch offers several key features: independent interior and exterior drives simplify cab entry and exit; a pre-loaded internal manual lever reduces noise and vibration, ensuring smooth operation; an accidental drive prevention mechanism minimizes unintended movement, protecting both operator and equipment safety; flexible release options, such as remote actuator connection or direct push, adapt to diverse cab designs.

Southco's R4 Rotary Latch series is renowned for its durability. As an upgraded version, the R4-50 Heavy-Duty Rotary Latch complies with the FMVSS 206 impact standard, IP65 dust and water resistance standard, EN 45545-3 fire safety standard, and vibration standards. This heavy-duty rotary latch integrates operator safety, rugged durability, and simplified access into a cost-effective system. It is compatible with Southco AC actuators, providing OEMs with a low-cost upgrade option.

Cynthia Bart, Global Product Manager, stated: "The new R4-50 Heavy-Duty Rotary Latch offers a complete, universal cab door entry/exit system suitable for heavy-duty vehicles. Its compatibility with Southco AC actuators allows designers to quickly and economically improve existing designs."