ON – OFF RED EMERGENCY STOP BUTTON

on – off red emergency stop button

on – off red emergency stop button

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Red Emergency Stop Button (ON-OFF Latching) – Complete Guide


A red emergency stop (E-stop) button with ON-OFF latching is a critical safety device used to immediately cut power to machinery in emergencies. Unlike momentary E-stops, this type stays in the OFF position until manually reset, ensuring machines remain halted until intentionally restarted.






???? Key Features


✅ Color & Design:





  • Bright red mushroom head (ISO 13850 compliant for emergency stops).




  • Yellow or black base ring for high visibility.
    ✅ Contact Type:




  • Normally Closed (NC) – Breaks circuit when pressed (failsafe).




  • Optional: NC + NO (for signaling or PLC control).
    ✅ Operation:




  • Latching mechanism – Stays pressed until twisted/pulled to reset.




  • Twist-to-release or key reset (varies by model).
    ✅ Electrical Ratings:




  • 10A @ 600V AC (typical industrial rating).




  • 5A @ 250V DC (check model specs).
    ✅ Mounting:




  • 22mm or 30mm panel cutout (standard sizes).




  • Metal or plastic housing (IP65/IP67 for dust/water resistance).
    ✅ Safety Certifications:




  • IEC 60947-5-5, UL, CE, TÜV.







???? How It Works




  1. Press the mushroom head → Circuit opens (machine stops).




  2. Twist or pull to reset → Circuit re-engages (machine can restart).




  3. Wiring:





    • NC terminals wired in series with the power circuit.




    • NO terminals (if present) for alarm signaling.









???? Applications


✔ Industrial Machinery (CNC, presses, conveyors).
✔ Robotics & Automation (safety shutdown).
✔ Medical/Lab Equipment (emergency cutoff).
✔ Power Distribution Panels.






???? Popular Models
































Model Brand Rating Reset Type
Schneider XB4BS8444 Schneider 10A/600V AC Twist-to-reset
Siemens 3SU1400-1AA20 Siemens 10A/690V AC Twist-to-reset
Omron A22E-M-11 Omron 10A/250V AC Key reset





???? Buying Tips




  1. Verify voltage/current ratings for your application.




  2. Choose reset type (twist, key, or pull).




  3. Check IP rating if used outdoors/wet environments.







???? FAQ


❓ Can I use this for 24V DC systems?
→ Yes, but check DC current rating (often lower than AC).


❓ How do I test an E-stop button?
→ Press it and verify the machine loses power and requires reset.


❓ Metal vs. plastic housing?
→ Metal for harsh environments, plastic for cost savings.





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