The Schneider Electric ZB4BS844 is a red 40 mm emergency stop push-button head from the Harmony XB4 range, designed for 22 mm panel mounting with a latching, twist-to-release mechanism for use in machine safety and control applications.

• Reference: ZB4BS844
• Range: Harmony XB4
• Product type: Push-button head for emergency stop
• Colour: Red
• Head diameter: 40 mm
• Mounting diameter: 22 mm (panel cutout: 22.5 mm)
• Body material: Chromed metal
• Operation: Latching, release by rotation (twist-to-release)
• Head shape: Round
• Sold as: Individual unit