ProMax 22MM Emergency Stop Switch Mushroom Head Waterproof Metal 2 pole

Specifications:

• Model: ProMax 22MM Emergency Stop Switch
• Switch Thread Size:22mm
• Mounting Style: Panel Mount
• No of Poles:2 Poles, Each pole has C, NO, and NC Terminals
• Pin Termination: Crimp Style
• Head Shape: Mushroom
• Protection Level: IP65
• Rated Voltage:36V（DC）250V(AC)
• Rated Current:1A（DC）5A(AC)
• Rated Power:180W（DC）1250W(AC)
• Operating Temperature:-25℃~+85℃
• Actuator:304 Stainless steel
• Housing Sleeve:H59 nickel plated brass/304Stainless steel
• Button Pin: H62 copper alloy
• Rubber Ring: SIL silica gel
• Housing Material: Metal body with high-visibility polymer head

Minimum hardware to get started:

• 16AWG (or thicker) insulated multistrand wire : to safely handle industrial loads or mains voltage without overheating or melting under sustained current.
• Fork or ring crimp connectors : to securely attach your wires to the switch's screw terminals; bare stranded wire can fray and cause dangerous short circuits.
• Mounting panel or enclosure (with 22mm cutout) : the switch must be rigidly mounted to allow you to strike it forcefully during an emergency without the assembly moving.

Safety Warnings:

• High Voltage Danger: If switching AC mains power (110V/220V), ensure all power is completely disconnected at the breaker before wiring.
• Current Limits: Do not exceed the rated 10A limit. If your machine draws more than 10A, you MUST use this switch to control the coil of an AC Power Contactor or heavy-duty relay, rather than switching the main load directly.

Accessories
Included in the Box:

• 1× ProMax 22mm Metal Emergency Stop Switch
• 1× Metal Mounting Nut
• 1× Waterproof Rubber Sealing Gasket

Frequently Asked Questions

• Is this emergency stop switch compatible with standard 22mm panel cutouts?
  Yes, it fits perfectly into any standard 22mm industrial control panel hole.
• Can I use this switch with a low-voltage 24V DC CNC controller?
  Absolutely, it works flawlessly with low-voltage DC signals up to its rated maximums.
• Does this switch work with standard AC power contactors?
  Yes, it is ideal for breaking the control coil circuit of heavy-duty AC contactors.
• Can I use this as a standard on/off switch for my project?
  It is not recommended for standard operations as the latching mushroom head is designed specifically for emergency cutoff scenarios.
• What is the maximum voltage this switch can handle?
  It can safely handle up to 400V AC in industrial environments.
• How much current can pass through the switch terminals?
  The heavy-duty contacts are rated for a maximum of 10A.
• Can I switch a high-power 20A motor directly with this button?
  No, for loads exceeding 10A, you must use this switch to trigger a contactor or relay instead of switching the main load directly.
• How do I know which terminals to use for an emergency cutoff?
  You should wire your safety circuit through the Normally Closed (NC) terminals so the circuit breaks when the button is pressed.
• Do I need to solder wires to this switch?
  No, the switch features secure screw terminals for easy and reliable wire connections using crimped forks or bare wire.
• Can I connect an indicator light to this switch?
  Yes, you can use the Normally Open (NO) block to close a circuit and trigger a warning light or siren when the button is struck.
• Do I need a software library to read this switch on an Arduino?
  No library is needed; you can read the state using a standard digitalRead() function with the internal pull-up resistor enabled.
• Is there example code for triggering an interrupt with this switch?
  You can use standard Arduino interrupt tutorials by attaching the switch to an interrupt-capable digital pin to immediately halt code execution.
• How do I debounce this mechanical switch in software?
  A simple 50ms software delay or a standard debounce library will effectively filter out any mechanical contact bounce when reading it via a microcontroller.
• Why does my machine not power back on after I press the stop button?
  Ensure you have physically twisted the mushroom head clockwise to unlatch and reset the switch.