The R4-50 Heavy-Duty Electronic Rotary Latch and Sensor from Southco is ideal for last-mile delivery vehicles, providing strength, reliability, and a strong cycle life. The latch offers FMVSS 206 capability for entry door applications, and features a cycle life five times longer than other electronic rotary latches, the company stated. Able to actuate in under a second, the R4-50 releases quickly and can be actuated remotely. It also offers an integrated microswitch that notifies users if the latch striker is in place or not, and the electronic system is sealed to protect against the environment.