This Product Selection Guide contains information to help select products in the Emergency Stop (E-Stop) Switches category on DigiKey.com
Emergency stop switches (also referred to as E-stop, kill switch, emergency off, and emergency power off) are used in applications where there is a need to shut down equipment or machinery quickly. These are often used in factories where machinery can cause damage to itself, things around it, or any human nearby if it starts to act in an undesired manner or protocols aren’t followed.
SelectionCharacteristics
Mounting Type : Indicates how the device is attached.
Reset Operation: Refers to the specific method or action required to reset the switch after it has been actuated or triggered in an emergency situation.
Circuit: Describes device function in terms of a number of poles and throws, as is typical for mechanical switches. For more information please see: Switch Basics, Examples of Pole and Throw
Switch Function: Refers to the specific operation or behavior of a switch, indicating the primary purpose or mode of operation. For more information please see: Switch Basics, Examples of Pole and Throw
Features: These are different capabilities or properties of the device such as illuminated or status indicator.
Current Rating (Amps): Typically this represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.
Voltage Rating - AC: Typically this represents the maximum AC voltage rating to which a device will meet its given specifications. Exceeding this voltage rating may damage the device and other system components.
Voltage Rating - DC: Typically this represents the maximum DC voltage rating to which a device will meet its given specifications. Exceeding this voltage rating may damage the device and other system components.
Panel Cutout Dimensions: Refers to the measurements or dimensions of the opening or cutout in the panel.
Termination Style: Selection of termination style used to connect the device to a system, such as PC pins, quick connects, or wire leads.
Ingress Protection : IP (Ingress Protection) Ratings (IP20, IP65, IP67 etc.) - Define how likely it is that water and dirt will get into the system. The first number is for dirt and solid contaminants and the second number is for water.
IP Ratings
| Protection Level | Solids | Liquids |
|---|---|---|
| 1 | Protected against solids larger than 50mm. | Protected against vertically falling drops of water. Limited Ingress permitted. |
| 2 | Protected against solids larger than 12.5mm. | Protected against vertically falling drops of water with the enclosure tilted up to 15 degrees from vertical. Limited ingress permitted. |
| 3 | Protected against solids larger than 2.5mm. | Protected against spraying water up to 60 degrees from vertical. Limited ingress permitted for 3 minutes. |
| 4 | Protected against solids larger than 1mm. | Protected against water splashed from any direction. Limited ingress permitted. |
| 5 | Protected against dust. Limited ingress of dust permitted. | Will not affect operation of equipment 2-8 hours. Protected against jets of water. Limited ingress permitted. |
| 6 | Dust tight. No ingress of dust 2-8 hours. | Protected against powerful jets of water. Limited ingress permitted. |
| 7 | ______________________ | Protected against the effects of immersion in 15cm-1m for 30 minutes. |
| 8 | ______________________ | Continuous immersion in water up to 3m for long periods of time. |
| 9 | ______________________ | Protected against high pressure jets of hot water. (30 seconds) |
| 9K | ______________________ | Protected against high pressure jets of hot water. (2 minutes) |
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Illumination Voltage (Nominal): Indicates the nominal operating voltage of a product’s illumination or backlighting feature, for products equipped therewith.
ProductExamples
| MFR PART # | SSA-EB1P-02ED1Q4 |
|---|---|
| DIGIKEY PART # | 2170-SSA-EB1P-02ED1Q4-ND |
| MANUFACTURER | Banner Engineering Corporation |
| DESCRIPTION | SSA-EB1 ESTOP 2NC |
| DATASHEET | Click Here |
| MFR PART # | XB5AS9445 |
|---|---|
| DIGIKEY PART # | 4008-XB5AS9445-ND |
| MANUFACTURER | Schneider Electric |
| DESCRIPTION | HARMONY XB5, EMERGENCY STOP SWIT |
| DATASHEET | Click Here |
| MFR PART # | FF0126BACAEA01 |
|---|---|
| DIGIKEY PART # | 360-FF0126BACAEA01-ND |
| MANUFACTURER | NKK Switches |
| DESCRIPTION | EMERGENCY STOP SWITCH |
| DATASHEET | Click Here |
SchematicSymbol
Schematic symbol courtesy of Scheme-it. Please see their website for more information and symbols.
MediaLinks
Videos
Videos on Emergency Switches
Articles
Mechanical Switches Meet Many Application Criteria
Satisfying Functional Safety Standards
Safety-Circuit Basics for Design Engineers
Product Training Modules
FF01 Series E-Stop Switch - NKK Switches
Blogs
EAO’s Digital 3D Configuration Tool
TechForum
What are the attributes of an emergency stop pushbutton?
Kill Switch