Stop Switch features back panel depth of just 18.8 mm.

Press Release Summary:

Suited for non-hazardous, heavy-use applications, Series 51 features single-piece, monoblock construction with snap-action switch element technology. Switches are sealed to IP65 standards from front panel and utilize industry standard 16 mm mounting hole. Available with 2.0 mm plug-in, solder, or PCB mount connection, Series 51 provides single-break momentary contact switch system with 2 contacts per switching element, and combination of NC or NO contacts.

Original Press Release:

EAO Series 51 Delivers Space-Saving Design for Compact Stop Switch

Milford, CT - EAO Corporation of Milford, CT USA, a premier global supplier of Human Machine Interface (HMI) Systems and Components, announces the launch of the Series 51 Stop Switch, with an industry leading space-saving design and back panel depth of 18.8 mm - less than the width of a penny.

The Series 51 is an attractive stop switch for non-hazardous, heavy-use applications, having achieved testing beyond 100,000 actuations. The Series 51 is especially well-suited for interfaces that require a visible actuation status, including:
  • Medical diagnostic equipment
  • Handheld pendants and devices
  • Machine and process control
  • Instrumentation
  • Disabled lifts

    Using a monoblock design, the Series 51 Stop Switch minimizes back panel depth to set a new space-saving standard unmatched by competitors' switches. Its design makes it ideal for applications that require exacting ergonomics combined with superior reliability and durability. It is sealed to IP65 standards from the front of the panel, utilizes an industry standard 16 mm mounting hole, and meets many international standards, including CE, EN 61058-1, and RoHS environmental requirements.

    The Series 51 Stop Switch uses EAO's time-proven, low-level and snap-action switch element technology, making it suitable for applications across a wide variety of current and voltage ranges. Solder, quick connect, and PCB terminals, along with a variation of N.O. and N.C. contact configurations, add to its versatility. Initially available in a low signal level switching element with 2.0 mm plug-in, solder, or PCB mount connection, the Series 51 provides a single-break momentary contact switch system with two contacts per switching element, and a combination of N.C and N.O. contacts.

    Another benefit of its single-piece, monoblock construction is the ability to specify a complete unit within one part number. This increases both design and purchasing efficiencies by only requiring the itemization of a single part number within a bill-of-materials or purchase order.

    Many of the world's leading manufacturers work with EAO as their partner for the integration of HMI Systems and Components with their mission-critical applications. Visit for more information on the Series 51 Stop Switch. For information on EAO's HMI Systems expertise, visit

    About EAO

    EAO Corporation is a technology leader in Human Machine Interface (HMI) Systems and Components. Founded more than 60 years ago in Olten, Switzerland, EAO is a global manufacturer of a full line of HMI Components, including switches and keypads, as well as complete HMI Systems. For more information, visit our web site at or contact EAO at 98 Washington Street, Milford, CT 06460; Telephone: 203-877-4577; Fax: 203-877-3694. Send E-mail inquiries to

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