Schneider Electric Emergency Stop Push Button ZB4BS844 40 mm Red Mushroom Head

The Schneider Electric ZB4BS844 is a high-quality emergency stop push button from the Harmony XB4 series, designed to provide reliable safety shutdown in industrial environments. With a 40 mm red mushroom head actuator and turn-to-release mechanism, this robust switch ensures quick and intuitive operation in critical situations. Its chromium-plated metal bezel and IP66/IP67/IP69/IP69K protection ratings make it suitable for harsh conditions, including high-pressure washdowns. The normally closed (NC) contact configuration ensures fail-safe operation, and the screw clamp terminals facilitate easy wiring. Compliant with EN/IEC 60947-5-1 and EN/ISO 13850, this emergency stop button is certified to UL, CSA, CCC, and EAC standards, guaranteeing global acceptance.

Advantages

This emergency stop push button offers exceptional durability with mechanical durability of 300,000 cycles and electrical durability of 1,000,000 cycles. Its wide operating temperature range from -40 to 70 °C ensures reliable performance in extreme environments. The high ingress protection ratings (IP66, IP67, IP69, IP69K) and NEMA 13/4X ratings provide resistance to dust, water, and corrosion, making it ideal for food processing, automotive, and heavy machinery applications.

Suitable for

• Industrial machinery safety circuits
• Conveyor systems
• Packaging equipment
• Automated production lines
• Food and beverage processing plants
• Heavy equipment and vehicle controls

Key specifications

• Product Series: Harmony XB4
• Product Type: Emergency Stop Push Button
• Actuator Type: Mushroom Head, Turn to Release
• Actuator Diameter: 40 mm
• Actuator Color: Red
• Contact Configuration: 1 Normally Closed (NC)
• Mounting Diameter: 22 mm
• Bezel Material: Chromium Plated Metal
• IP Protection Rating: IP66, IP67, IP69, IP69K
• NEMA Protection Rating: NEMA 13, NEMA 4X
• Operating Temperature: -40 to 70 °C
• Mechanical Durability: 300,000 cycles
• Electrical Durability: 1,000,000 cycles (AC-15, DC-13)
• Rated Insulation Voltage (Ui): 600 V (IEC 60947-1)
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Connection Type: Screw Clamp Terminals
• Standards Compliance: EN/IEC 60947-5-1, EN/ISO 13850
• Certifications: UL, CSA, CCC, EAC

Recommendations

For optimal safety, always install emergency stop buttons in easily accessible locations and ensure they are wired according to local regulations. The ZB4BS844 is designed for use in safety circuits and should be integrated with appropriate safety relays or controllers. Regular testing is recommended to maintain reliability.