The Schmersal TFA-020 with Centering Device; AZ 16; AZ 16-STS30,AZM 161-STS30 is a three-way, non-handed actuator made of die-cast aluminum. It provides easy and comfortable operation and is suitable for all three-way switching functions. It features a compact, ergonomic design, which allows it to blend in with nearly any environment. The rotary switch has a snap-action momentary switch, which provides a tactile response when used.The bottom of the actuator has an integrated centering device. This device ensures that the actuator always returns to the same position, which is typically the center position of the rotary switch. This allows for consistency when changing multiple positions.The AZ 16-STS30 and AZM161-STS30 are two types of safety switches that feature two relevant operating elements. Each has a normally closed version that is released when the actuator is in the active position. The normally open version is released when the actuator is raised.The TFA-020 with the two types of safety switches can be used for a variety of applications including emergency stops, position holding, and proximities. The actuator is rated for IP65 and is certified to UL 508A standards. It comes with a two-year warranty.