EMERGENCY PUSH BUTTON WITH NC | XB4BS8444 (SCHNEIDER)

Emergency Push Button with NC | XB4BS8444 (Schneider)

Emergency Push Button with NC | XB4BS8444 (Schneider)

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Schneider XB4BS8444 Emergency Push Button (NC) – Technical Overview


The Schneider XB4BS8444 is a high-quality emergency stop (E-stop) button with a Normally Closed (NC) contact, designed for industrial safety applications. It features a mushroom head for quick activation and complies with international safety standards.






???? Key Specifications


✅ Type: Emergency Stop (E-Stop) Push Button
✅ Contact Configuration: 1NC (Normally Closed) – Ensures fail-safe operation.
✅ Actuation: Mushroom head (40mm diameter) – Easy to press in emergencies.
✅ Electrical Rating:





  • 10A @ 600V AC (resistive load)




  • 6A @ 600V AC (inductive load)




  • 5A @ 250V DC
    ✅ Mechanical Life: 1,000,000+ operations
    ✅ Enclosure Material: Thermoplastic (UL94 V-0 flame-resistant)
    ✅ Protection Rating: IP67 (dustproof & waterproof)
    ✅ Mounting: 22mm panel cutout
    ✅ Safety Standards:




  • IEC/EN 60947-5-5 (emergency stop devices)




  • CE, UL, TÜV certified







???? Features & Benefits


✔ High Visibility – Red mushroom head with yellow background ring (ISO-compliant).
✔ Latching Mechanism – Requires manual twist-to-reset after activation.
✔ Durable Construction – Resists oil, chemicals, and UV exposure.
✔ Screw Terminal Connection – Secure wiring.






???? Wiring & Installation


Connection Diagram (NC Contact)




  • Terminals:





    • A1/A2 – NC contact (breaks circuit when pressed).






  • Wiring:





    • Connect A1/A2 in series with the machine’s power control circuit.






  • Reset Method:





    • Twist the mushroom head clockwise to reset.






⚠ Safety Note:





  • Always test the E-stop function before machine operation.




  • Use only in NC mode for safety compliance.







???? Applications


✔ Industrial Machinery (CNC, presses, conveyors).
✔ Robotics & Automation Systems.
✔ Packaging & Material Handling Equipment.
✔ Power Distribution Panels.






???? Where to Buy?




  • Authorized Schneider Distributors (e.g., SE.com, RS Components, AutomationDirect).




  • Amazon (Search "Schneider XB4BS8444").




  • Industrial Electrical Suppliers.







???? Alternatives (If Unavailable)




  • Siemens 3SU1400-1AA20-1CA0 (Similar 22mm E-stop).




  • Omron A22E-M-11 (IP66, 10A/250V AC).




  • ABB 1SFA899105R1000 (Metal enclosure).







???? FAQ


❓ Can this button be used in 24V DC systems?
→ Yes, but check DC current rating (typically lower than AC).


❓ Is the button lockable in the pressed position?
→ No, it must be manually reset by twisting.


❓ Does it come with a mounting nut?
→ Yes, Schneider XB4 buttons include a fixing nut.





Need help with installation or wiring? Ask about:



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