The AYD3BN-R is a replacement button component for ø40mm push-pull stop switches in IDEC's TWTD series of heavy-duty industrial pushbutton switches. This button is designed for use with push-pull operator mechanisms and is available in multiple color options (black, green, red, blue, yellow) to support various signaling and control applications. The button integrates with the modular TWTD construction system, which features chrome-plated zinc locking rings, die-cast zinc mounting threads, and self-cleaning slow-make/double-break contacts for reliable operation in harsh industrial environments. It is rated for Type 4X and IP65 watertight/oiltight panel protection, making it suitable for demanding applications requiring durability and environmental resistance. The button supports both momentary and maintained contact configurations and can be paired with LED or incandescent illumination options through compatible lens and lamp assemblies.