Emergency Stop Switches / E-Stop Switches

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Series 51 E-Stops & Stop Switches

EAO Series 51 Emergency Stop Switches (E-Stops) and Stop Switches provide reliable snap-action switching, serving as on-off buttons in industrial automation, mobile control units, and mechanical engineering. EAO Series 51 E-Stops and Stop Switches feature an extremely low back panel depth (18.8mm) and are resistant to impact, shock, and vibration. The series provides a long service life and is usable down to -40°C.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Type	Illuminated	Contact Form	Switch Function	Current Rating	Voltage Rating AC	Voltage Rating DC	Mounting Style	Termination Style	Button Size	Panel Cutout	Panel Thickness	IP Rating
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Black, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock 51-256.0250 EAO 1: ¥5,376.7 65In Stock New Product	Mfr. Part # 51-256.0250 Mouser Part # 123-51-256.0250 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Black, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	65In Stock	¥5,376.7 ¥5,245.4 ¥5,127.5 ¥5,024.5 Quote Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Yellow, Plastic, opaque, Round, 2 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-252.0264 EAO 1: ¥6,647.3 1In Stock 5Expected 10/14/2026 New Product	Mfr. Part # 51-252.0264 Mouser Part # 123-51-252.0264 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Yellow, Plastic, opaque, Round, 2 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	1In Stock 5Expected 10/14/2026	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	2 NC	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 2 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-252.0265 EAO 1: ¥6,647.3 4In Stock New Product	Mfr. Part # 51-252.0265 Mouser Part # 123-51-252.0265 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 2 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	2 NC	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Plug-interminal, 2.8 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-253.0225 EAO 1: ¥6,647.3 4In Stock New Product	Mfr. Part # 51-253.0225 Mouser Part # 123-51-253.0225 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Plug-interminal, 2.8 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Plug-interminal, 2.8 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-253.0228 EAO 1: ¥6,647.3 4In Stock New Product	Mfr. Part # 51-253.0228 Mouser Part # 123-51-253.0228 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Plug-interminal, 2.8 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Yellow, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-253.0264 EAO 1: ¥6,647.3 4In Stock New Product	Mfr. Part # 51-253.0264 Mouser Part # 123-51-253.0264 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Yellow, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-253.0265 EAO 1: ¥6,647.3 4In Stock New Product	Mfr. Part # 51-253.0265 Mouser Part # 123-51-253.0265 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-253.0268 EAO 1: ¥6,647.3 4In Stock New Product	Mfr. Part # 51-253.0268 Mouser Part # 123-51-253.0268 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Yellow, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock 51-256.0254 EAO 1: ¥5,376.7 4In Stock New Product	Mfr. Part # 51-256.0254 Mouser Part # 123-51-256.0254 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Yellow, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥5,376.7 ¥5,245.4 ¥5,127.5 ¥5,024.5 Quote Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock 51-256.0255 EAO 1: ¥5,376.7 4In Stock New Product	Mfr. Part # 51-256.0255 Mouser Part # 123-51-256.0255 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Green, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥5,376.7 ¥5,245.4 ¥5,127.5 ¥5,024.5 Quote Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Blue, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock 51-256.0256 EAO 1: ¥5,376.7 2In Stock 10On Order New Product	Mfr. Part # 51-256.0256 Mouser Part # 123-51-256.0256 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Blue, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	2In Stock 10On Order On Order Ship Dates Mfr. #: 51-256.0256 Stock: 2 Can Ship Immediately On Order: 5 Expected 10/14/2026 5 Expected 10/27/2026 Factory Lead-Time: 6 Weeks	¥5,376.7 ¥5,245.4 ¥5,127.5 ¥5,024.5 Quote Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock 51-256.0258 EAO 1: ¥5,376.7 4In Stock New Product	Mfr. Part # 51-256.0258 Mouser Part # 123-51-256.0258 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC / 1 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	4In Stock	¥5,376.7 ¥5,245.4 ¥5,127.5 ¥5,024.5 Quote Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC + 1 NO	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-256.0268 EAO 1: ¥5,376.7 5In Stock New Product	Mfr. Part # 51-256.0268 Mouser Part # 123-51-256.0268 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Grey, Plastic, opaque, Round, 1 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	5In Stock	¥5,376.7 ¥5,245.4 ¥5,127.5 ¥5,024.5 Quote Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	1 NC	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Black, Plastic, opaque, Round, 2 NC / 2 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock 51-259.0250 EAO 1: ¥6,132.4 1In Stock 5Expected 10/14/2026 New Product	Mfr. Part # 51-259.0250 Mouser Part # 123-51-259.0250 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Black, Plastic, opaque, Round, 2 NC / 2 NO, Maintained, Solderingterminal, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	1In Stock 5Expected 10/14/2026	¥6,132.4 ¥5,974.6 ¥5,846.7 ¥5,732.1 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	2 NO + 2 NC	ON - OFF	5 A	250 VAC	24 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65
Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Blue, Plastic, opaque, Round, 2 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock 51-252.0266 EAO 1: ¥6,647.3 5Expected 10/13/2026 New Product	Mfr. Part # 51-252.0266 Mouser Part # 123-51-252.0266 New Product	EAO	Emergency Stop Switches / E-Stop Switches Actuator, 24,5 mm, Mushroom-head, Non illuminated, Blue, Plastic, opaque, Round, 2 NC, Maintained, Universal terminal, 2 x 0.5 mm, IP65, according to DIN EN 60529, Twist to unlock Learn More about EAO series 51 e stops	Datasheet	5Expected 10/13/2026	¥6,647.3 ¥6,476.2 ¥6,338.4 ¥6,213.8 View Quote	Min.: 1 Mult.: 1	Twist-to-Release	Non-Illuminated	2 NC	ON - OFF	100 mA	42 VAC	42 VDC	Panel Mount	Solder Terminal	24 mm	16.2 mm	1 mm to 3mm	IP65

Series 51 E-Stops & Stop Switches

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