Emergency Stop Switches

Emergency stop switches are the operator-accessible mushroom-head pushbuttons that initiate the safety stop circuit of machinery. Enicstra stocks E-stops from Allen-Bradley, Schneider Electric, Pilz, Eaton, Siemens, IDEC, Banner, and other manufacturers — current production along with legacy part numbers used in installed control panels.

Inventory covers 22 mm and 30 mm mounting standards, twist-to-release and key-release versions, illuminated and non-illuminated heads, and contact blocks in NO/NC configurations to suit your existing safety relay or controller. Pre-assembled enclosure-mounted E-stop stations, pendant stations, and base-mounted units are also stocked. Every switch is bench-tested for contact integrity before shipment and backed by our 12-month functional warranty.

Emergency stop switches are part of a machine's safety system — final integration, risk assessment, and validation against ISO 13850 and IEC 60947-5-5 are the responsibility of the end-user and safety integrator. If a specific E-stop catalog number isn't listed, send the OEM part code and we'll quote — most replies within 1–2 business days.

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Emergency Stop Switches

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Buying guide

Choosing Emergency Stop Switches components

An emergency stop switch is more than a red pushbutton. Modern E-stops are safety-rated devices with specific mounting standards, contact configurations, and release mechanisms that must match the safety circuit they connect to. Replacing a switch without matching the contact block, voltage, or release type can compromise the safety function.

Specifications to confirm before ordering:

Mounting standard — 22 mm (compact) or 30 mm (heavy duty)
Release method — twist-to-release, key-release, or pull-to-release
Contact block configuration — number of NC safety contacts and NO auxiliary contacts
Illumination — yes/no, voltage (12 V, 24 V, 110 V, 230 V), and LED color
Head color and marking — typically red mushroom on yellow background per ISO 13850
Enclosure type — panel-mount, pendant, base-mount, or industrial cable station
IP rating for the operating environment
Compliance markings — UL, CSA, CE, ISO 13850 reference

Application guidance:

Control panel face-plates: 22 mm panel-mount with twist-release
High-risk machinery requiring authorization: 30 mm key-release variants
Low-light or operator-confirmation needed: illuminated heads with status LED
Robot teach pendants and portable controls: palm-actuated E-stops on pendant stations
Outdoor or washdown: sealed enclosure stations with IP67/IP69K rating

Cross-brand replacement (Allen-Bradley to Schneider, for example) is often functionally possible but requires matching the contact block count and configuration. Send the original part number and we'll confirm compatibility.

Related categories Frequently asked questions

Can you supply discontinued E-stop part numbers?

Yes. Legacy 22 mm and 30 mm E-stops from Allen-Bradley, Schneider (Telemecanique), Pilz, IDEC, and others are commonly sourced. This includes older contact blocks, discontinued illuminated variants, and full assemblies for legacy control panels. Submit the part number to check availability.

What's the difference between 22 mm and 30 mm mounting?

The 22 mm standard is the modern compact format used in most new control panels — IEC-derived and common across European and Asian manufacturers. The 30 mm standard is heavier-duty, common in North American panels and older Allen-Bradley installations. They're not interchangeable; the panel cutout is different.

Twist-release, key-release, or pull-release — which do I need?

Twist-release is the default for general machinery — operators rotate the mushroom head to reset. Key-release is for situations requiring supervisor authorization before restart (often required by risk assessment for high-energy machinery). Pull-release is older and less common in current designs.

Can I substitute an E-stop from one brand for another?

Often, yes — if the mounting standard, contact configuration, and release type match. Allen-Bradley 800FP series and Schneider XALK series are functionally similar, for instance. Send the original part number and we'll confirm compatibility with your safety relay before quoting.

Who's responsible for safety validation?

The end-user and safety integrator. We supply the device as-marked with the original manufacturer compliance documentation when available. Final risk assessment, circuit integration, and periodic validation against ISO 13850 and your local regulatory requirements remain your responsibility.