STI (SS2222EM-EN) Key-to-Reset Illuminated ; Momentary Ill

The STI SS2222EM-EN is a yellow, indoor-only, flush-or-surface Stopper Station with key-to-reset illumination and an “EMERGENCY” label in English. First, an occupant lifts the protective cover. Then they press the illuminated button to engage the contact. As a result, the connected emergency-stop or process-control circuit responds, and an operator with the reset key restores standby.

What the STI SS2222EM-EN is built for

Generic emergency-stop and process-control applications need a clearly visible, supervised activation point. However, casual pushbutton switches are too easy to bump or vandalize. Therefore, the SS2222EM-EN combines the curved polycarbonate cover with key-to-reset behavior so only authorized personnel can clear the latched state.

Verified STI SS2222EM-EN specifications

• Series: STI Stopper Station SS2000 family — SS2222 base = yellow, indoor only, flush or surface, key-to-reset, illuminated
• Color: Bright yellow housing with “EMERGENCY” label in white
• Activation: Push button with integrated LED illumination
• Reset: Key-to-reset (latches on activation; requires reset key to clear)
• Mounting: Flush or surface; indoor only
• Label: “EMERGENCY” in English
• Cover: Clear polycarbonate protective cover with curved design to prevent accidental activation
• Contacts: Interchangeable N.O. or N.C. SPST gold-plated contact blocks
• Contact rating: 6 A @ 600 VAC; 1 A @ 250 VDC
• Listing: UL Listed to U.S. and Canadian safety standards; complies with UL 2017
• Material: Polycarbonate with stainless steel backplate; 5VA flammability rating; polycarbonate FDA-compliant for food contact
• Operating range: Polycarbonate working properties -40° to 250°F (-40° to 121°C)
• Compliance: ADA Compliant push button (excludes “3” key switch button variant)
• Warranty: Three-year guarantee against polycarbonate breakage in normal use; one year on electro-mechanical and electronic components

Where SS2222EM-EN fits in the SS2222 family

The SS2222 base is the indoor-only, flush-or-surface, illuminated platform. Specifically, the EM suffix means EMERGENCY label; ES is EMERGENCY STOP; EX is EMERGENCY EXIT. Furthermore, the SS2025EM-EN sibling adds a momentary reset (vs. key-to-reset) for applications where the contact need not latch. As a result, ordering the wrong suffix yields the wrong legend or the wrong reset behavior.

Application context

Process equipment e-stops, lab emergency controls, and kitchen alarm panels are typical installations. In addition, the FDA-compliant polycarbonate makes the SS2222EM-EN suitable for food-handling areas where the cover may be cleaned often. However, this station is indoor only and is not a fire alarm initiating device.

Need help selecting the right part or verifying compatibility? Our team supports thousands of commercial fire alarm installations every year. Call us at 1-888-557-0558 or email sales@lifesafetycom.com for application guidance, lead-time updates, or volume pricing.