Overview
The Dayton 30G251 emergency stop pushbutton delivers reliable fail-safe control for industrial machinery and electrical equipment. This 22mm form-factor unit features a red 40mm mushroom head operator, maintained contact action (push/pull trigger release), and is built for demanding NEMA-rated environments. Whether upgrading legacy panels or stocking spare components, the 30G251 meets CE, CSA, IEC, and UL standards for both safety-critical and general control applications.
Key Features
- Red 40mm mushroom head operator with nitrile rubber construction for durability and ergonomic grip
- Maintained contact action with push/pull trigger release for positive confirmation and safe re-engagement
- 1NO/1NC dual contact form enables both open and closed circuit control from a single button
- Chrome die-cast aluminum bezel resists corrosion in harsh manufacturing and washdown environments
- NEMA 1, 2, 3, 4, 4X, 12, and 13 rated for indoor, outdoor, washdown, and corrosive atmosphere applications
- Pressure plate terminal connection for secure, reliable wiring without special adapters
Technical Specifications
- Contact Rating: 10A @ 600V AC (A600/Q600 NEMA designation)
- Contact Form: 1NO/1NC (one normally open, one normally closed)
- Operator Type: 40mm mushroom head, maintained action
- Size: 22mm mounting diameter
- Head Material: Nitrile rubber
- Bezel Material: Chrome die-cast aluminum
- Color: Red
- Terminal Connection: Pressure plate
- Legend: No legend (blank head)
- Standards: UL, CSA, CE, IEC
- NEMA Ratings: 1, 2, 3, 4, 4X, 12, 13
- Shipping Weight: 0.3 lbs
Typical Applications
- Emergency shutdown circuits on large machinery, presses, and conveyors
- Washdown and wet-environment control panels in food, beverage, and chemical processing
- Outdoor HVAC and utilities equipment requiring corrosion resistance (NEMA 4X)
- General industrial control consoles in manufacturing, automotive, and aggregate operations
- Safety interlocks and fault-response automation systems
Compatibility & Replacements
Compatible With
- 22mm standard pushbutton panel cutout (ISO/IEC 61076-2-109 compliant mounting)
- Industrial PLC and relay logic control systems
- Hardwired control panels, NEMA-rated enclosures, and DIN rail assemblies
- Standard 600V AC industrial electrical systems
Replaces / Drop-In Replacement For
- Earlier Dayton 30G251 units (same part number across manufacturing runs)
- Generic 22mm red mushroom emergency stop heads with 1NO/1NC contact form
- Note: Always verify contact form (1NO/1NC vs. 1NC-only) and terminal type before ordering as a direct replacement for non-Dayton units
Works With
- Standard 22mm control panel cutouts and mounting fixtures
- Pressure plate terminal blocks and standard AWG 12-14 wiring
- NEMA-rated enclosures, industrial control relays, and contactor circuits
- No special software or firmware integration required—simple hardwired safety control
