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Series 51 Switch Range

EAO Series 51 Switch Range is an oil and watertight, high-quality switch range that includes pushbuttons, indicators, illuminated selector switches, key locks, and "mono-block" stop switches. It is possible to choose up to 4NO/4NC snap-action switching elements per switch and low-level switching elements are also available. Both standard panel-mount (16mm cut-out) and flush-mount (22.5mm cut-out) styles are available from EAO.

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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.
Keylock Switches KYLK RND MOM 3POS 51-378.AD EAO 1: ¥19,131.4 8In Stock	Mfr. Part # 51-378.AD Mouser Part # 123-51-378.AD	EAO	Keylock Switches KYLK RND MOM 3POS Learn More about EAO series 51 switches	Datasheet	8In Stock	¥19,131.4 ¥16,497.1 ¥15,709.7 ¥14,866 View ¥14,216.5 Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MOM SLGP QC 51-151.022 EAO 1: ¥6,451.3 74In Stock 1Expected 10/28/2026	Mfr. Part # 51-151.022 Mouser Part # 123-51-151.022	EAO	Switch Actuators LPB SQ MOM SLGP QC Learn More about EAO series 51 switches	Datasheet	74In Stock 1Expected 10/28/2026	¥6,451.3 Quote Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-235.022D EAO 1: ¥12,558.8 61In Stock	Mfr. Part # 51-235.022D Mouser Part # 123-51-235.022D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	61In Stock	¥12,558.8 ¥11,982.5 ¥11,632 Quote Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-236.025D EAO 1: ¥14,201.6 29In Stock	Mfr. Part # 51-236.025D Mouser Part # 123-51-236.025D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	29In Stock	¥14,201.6 ¥13,876 ¥13,610.2 ¥13,170.1 View Quote	Min.: 1 Mult.: 1
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 2N.C 51-252.026 EAO 1: ¥6,647.3 75In Stock	Mfr. Part # 51-252.026 Mouser Part # 123-51-252.026	EAO	Switch Actuators STP SWTC W-ANTI TWIST RELEASE 2N.C Learn More about EAO series 51 switches	Datasheet	75In Stock	¥6,647.3 ¥6,630.7 ¥6,433.1 ¥6,373.3 ¥6,371.6	Min.: 1 Mult.: 1
Keylock Switches KYLK SQ MNT 2POS 51-255.022D EAO 1: ¥12,558.8 34In Stock	Mfr. Part # 51-255.022D Mouser Part # 123-51-255.022D	EAO	Keylock Switches KYLK SQ MNT 2POS Learn More about EAO series 51 switches	Datasheet	34In Stock	¥12,558.8 ¥12,138.6 ¥12,055.5 ¥11,739.9 View Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-235.025D EAO 1: ¥11,510.7 67In Stock 32Expected 11/17/2026	Mfr. Part # 51-235.025D Mouser Part # 123-51-235.025D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	67In Stock 32Expected 11/17/2026	¥11,510.7 ¥11,482.5 ¥11,133.7 ¥10,980.9 View ¥10,681.9 Quote	Min.: 1 Mult.: 1
Switch Cases / Switch Covers protect COVER-REC 51-925 EAO 1: ¥1,463.3 365In Stock 529On Order	Mfr. Part # 51-925 Mouser Part # 123-51-925	EAO	Switch Cases / Switch Covers protect COVER-REC Learn More about EAO series 51 switches	Datasheet	365In Stock 529On Order On Order Ship Dates Mfr. #: 51-925 Stock: 365 Can Ship Immediately On Order: 511 Pending 18 Expected 10/12/2026 Factory Lead-Time: 15 Weeks	¥1,463.3 ¥1,342.1 ¥1,235.8 ¥1,195.9 View ¥1,139.4 ¥1,069.7 ¥1,046.4 ¥1,034.8 Quote	Min.: 1 Mult.: 1
Panel Mount Indicator Housings & Hardware IND REC BLK QC 51-040.002 EAO 1: ¥1,950 45In Stock	Mfr. Part # 51-040.002 Mouser Part # 123-51-040.002	EAO	Panel Mount Indicator Housings & Hardware IND REC BLK QC Learn More about EAO series 51 switches	Datasheet	45In Stock	¥1,950 ¥1,946.7 ¥1,827.1 ¥1,773.9 Quote Quote	Min.: 1 Mult.: 1
Panel Mount Indicator Housings & Hardware IND REC BLK SLDR 51-040.005 EAO 1: ¥1,950 41In Stock	Mfr. Part # 51-040.005 Mouser Part # 123-51-040.005	EAO	Panel Mount Indicator Housings & Hardware IND REC BLK SLDR Learn More about EAO series 51 switches	Datasheet	41In Stock	¥1,950 ¥1,946.7 ¥1,852 ¥1,820.5 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM SLGP QC 51-121.022 EAO 1: ¥6,451.3 21In Stock 16Expected 10/19/2026	Mfr. Part # 51-121.022 Mouser Part # 123-51-121.022	EAO	Switch Actuators LPB REC MOM SLGP QC Learn More about EAO series 51 switches	Datasheet	21In Stock 16Expected 10/19/2026	¥6,451.3 ¥6,369.9 ¥6,280.2 ¥6,173.9 View Quote	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-121.025 EAO 1: ¥5,788.6 17In Stock	Mfr. Part # 51-121.025 Mouser Part # 123-51-121.025	EAO	Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR Learn More about EAO series 51 switches	Datasheet	17In Stock	¥5,788.6 ¥5,725.5 ¥5,562.7 ¥5,197.3 ¥5,107.6	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-122.025 EAO 1: ¥8,338.2 2In Stock	Mfr. Part # 51-122.025 Mouser Part # 123-51-122.025	EAO	Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR Learn More about EAO series 51 switches	Datasheet	2In Stock	¥8,338.2 ¥8,125.6 ¥7,951.2 ¥7,662.2 Quote Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MOM SLGP SLDR 51-151.025 EAO 1: ¥5,981.3 11In Stock	Mfr. Part # 51-151.025 Mouser Part # 123-51-151.025	EAO	Switch Actuators LPB SQ MOM SLGP SLDR Learn More about EAO series 51 switches	Datasheet	11In Stock	¥5,981.3 ¥5,833.4 View Quote	Min.: 1 Mult.: 1
Switch Hardware LPB ACTUATOR REC 51-165.0 EAO 1: ¥3,273.8 51In Stock	Mfr. Part # 51-165.0 Mouser Part # 123-51-165.0	EAO	Switch Hardware LPB ACTUATOR REC Learn More about EAO series 51 switches	Datasheet	51In Stock	¥3,273.8 ¥3,272.2 ¥3,212.4 ¥3,099.4 View ¥3,059.6 Quote	Min.: 1 Mult.: 1
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 1N.C 51-256.026 EAO 1: ¥5,605.9 14In Stock	Mfr. Part # 51-256.026 Mouser Part # 123-51-256.026	EAO	Switch Actuators STP SWTC W-ANTI TWIST RELEASE 1N.C Learn More about EAO series 51 switches	Datasheet	14In Stock	¥5,605.9 ¥5,537.8 ¥5,476.3 ¥5,041.1 ¥4,946.5	Min.: 1 Mult.: 1
Switch Actuators LPB REC MNT SLGP QC 51-261.022 EAO 1: ¥7,411.4 4In Stock	Mfr. Part # 51-261.022 Mouser Part # 123-51-261.022	EAO	Switch Actuators LPB REC MNT SLGP QC Learn More about EAO series 51 switches	Datasheet	4In Stock	¥7,411.4 ¥7,409.7 ¥7,228.7 View Quote	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MNT SLGP SLDR 51-261.025 EAO 1: ¥6,363.3 4In Stock	Mfr. Part # 51-261.025 Mouser Part # 123-51-261.025	EAO	Pushbutton Switches - Industrial LPB REC MNT SLGP SLDR Learn More about EAO series 51 switches	Datasheet	4In Stock	¥6,363.3 ¥6,361.6 ¥6,198.9 ¥6,067.6 View ¥5,846.7 Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MNT SLGP SLDR 51-262.025 EAO 1: ¥8,886.4 4In Stock	Mfr. Part # 51-262.025 Mouser Part # 123-51-262.025	EAO	Switch Actuators LPB REC MNT SLGP SLDR Learn More about EAO series 51 switches	Datasheet	4In Stock	¥8,886.4 ¥8,700.3 ¥8,515.9 ¥8,336.6 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MNT SLGP SLDR 51-281.025 EAO 1: ¥7,635.6 3In Stock	Mfr. Part # 51-281.025 Mouser Part # 123-51-281.025	EAO	Switch Actuators LPB SQ MNT SLGP SLDR Learn More about EAO series 51 switches	Datasheet	3In Stock	¥7,635.6 ¥6,363.3 ¥6,198.9 ¥6,066 View ¥5,946.4 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-135.025D EAO 1: ¥13,168.4 2In Stock	Mfr. Part # 51-135.025D Mouser Part # 123-51-135.025D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	2In Stock	¥13,168.4 ¥13,166.7 ¥12,866.1 ¥12,620.3 View ¥12,213.3 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK REC MNT 2POS 51-195.022D EAO 1: ¥12,558.8 10In Stock	Mfr. Part # 51-195.022D Mouser Part # 123-51-195.022D	EAO	Keylock Switches KYLK REC MNT 2POS Learn More about EAO series 51 switches	Datasheet	10In Stock	¥12,558.8 ¥12,334.6 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-421.036 EAO 1: ¥6,356.6 34In Stock	Mfr. Part # 51-421.036 Mouser Part # 123-51-421.036	EAO	Switch Actuators LPB REC MOM GD UNV LL Learn More about EAO series 51 switches	Datasheet	34In Stock	¥6,356.6 ¥6,355	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-423.036 EAO 1: ¥6,356.6 1In Stock	Mfr. Part # 51-423.036 Mouser Part # 123-51-423.036	EAO	Switch Actuators LPB REC MOM GD UNV LL Learn More about EAO series 51 switches	Datasheet	1In Stock	¥6,356.6 ¥6,193.9 ¥6,016.1 ¥5,894.9 Quote Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-425.036 EAO 1: ¥4,079.4 17In Stock	Mfr. Part # 51-425.036 Mouser Part # 123-51-425.036	EAO	Switch Actuators LPB REC MOM GD UNV LL Learn More about EAO series 51 switches	Datasheet	17In Stock	¥4,079.4 ¥4,006.3 ¥3,920 ¥3,813.7 Quote Quote	Min.: 1 Mult.: 1

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Series 51 Switch Range

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