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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 (HKD) 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: HK$946.78 8In Stock	Mfr. Part No. 51-378.AD Mouser Part No 123-51-378.AD	EAO	Keylock Switches KYLK RND MOM 3POS Learn More about EAO series 51 switches	Datasheet	8In Stock	HK$946.78 HK$816.41 HK$777.45 HK$735.69 View HK$703.55 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-235.022D EAO 1: HK$621.51 61In Stock	Mfr. Part No. 51-235.022D Mouser Part No 123-51-235.022D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	61In Stock	HK$621.51 HK$592.99 HK$575.65 Quote Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-236.025D EAO 1: HK$702.81 29In Stock	Mfr. Part No. 51-236.025D Mouser Part No 123-51-236.025D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	29In Stock	HK$702.81 HK$686.70 HK$673.55 HK$651.76 View Quote	Min.: 1 Mult.: 1
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 2N.C 51-252.026 EAO 1: HK$328.96 75In Stock	Mfr. Part No. 51-252.026 Mouser Part No 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	HK$328.96 HK$328.14 HK$318.36 HK$315.40 HK$315.32	Min.: 1 Mult.: 1
Keylock Switches KYLK SQ MNT 2POS 51-255.022D EAO 1: HK$621.51 34In Stock	Mfr. Part No. 51-255.022D Mouser Part No 123-51-255.022D	EAO	Keylock Switches KYLK SQ MNT 2POS Learn More about EAO series 51 switches	Datasheet	34In Stock	HK$621.51 HK$600.72 HK$596.61 HK$580.99 View Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-235.025D EAO 1: HK$569.65 67In Stock 32Expected 17/11/2026	Mfr. Part No. 51-235.025D Mouser Part No 123-51-235.025D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	67In Stock 32Expected 17/11/2026	HK$569.65 HK$568.25 HK$550.99 HK$543.42 View HK$528.63 Quote	Min.: 1 Mult.: 1
Switch Cases / Switch Covers protect COVER-REC 51-925 EAO 1: HK$72.42 365In Stock 529On Order	Mfr. Part No. 51-925 Mouser Part No 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. No: 51-925 Stock: 365 Can Dispatch Immediately On Order: 511 Pending 18 Expected 12/10/2026 Factory Lead Time: 15 Weeks	HK$72.42 HK$66.42 HK$61.16 HK$59.18 View HK$56.39 HK$52.94 HK$51.79 HK$51.21 Quote	Min.: 1 Mult.: 1
Panel Mount Indicator Housings & Hardware IND REC BLK QC 51-040.002 EAO 1: HK$96.50 45In Stock	Mfr. Part No. 51-040.002 Mouser Part No 123-51-040.002	EAO	Panel Mount Indicator Housings & Hardware IND REC BLK QC Learn More about EAO series 51 switches	Datasheet	45In Stock	HK$96.50 HK$96.34 HK$90.42 HK$87.79 Quote Quote	Min.: 1 Mult.: 1
Panel Mount Indicator Housings & Hardware IND REC BLK SLDR 51-040.005 EAO 1: HK$96.50 41In Stock	Mfr. Part No. 51-040.005 Mouser Part No 123-51-040.005	EAO	Panel Mount Indicator Housings & Hardware IND REC BLK SLDR Learn More about EAO series 51 switches	Datasheet	41In Stock	HK$96.50 HK$96.34 HK$91.65 HK$90.09 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM SLGP QC 51-121.022 EAO 1: HK$319.26 16In Stock 21On Order	Mfr. Part No. 51-121.022 Mouser Part No 123-51-121.022	EAO	Switch Actuators LPB REC MOM SLGP QC Learn More about EAO series 51 switches	Datasheet	16In Stock 21On Order On Order Ship Dates Mfr. No: 51-121.022 Stock: 16 Can Dispatch Immediately On Order: 16 Expected 19/10/2026 5 Expected 23/10/2026 Factory Lead Time: 7 Weeks	HK$319.26 HK$315.24 HK$310.80 HK$305.54 View Quote	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-121.025 EAO 1: HK$286.47 17In Stock	Mfr. Part No. 51-121.025 Mouser Part No 123-51-121.025	EAO	Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR Learn More about EAO series 51 switches	Datasheet	17In Stock	HK$286.47 HK$283.34 HK$275.29 HK$257.20 HK$252.77	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-122.025 EAO 1: HK$412.64 2In Stock	Mfr. Part No. 51-122.025 Mouser Part No 123-51-122.025	EAO	Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR Learn More about EAO series 51 switches	Datasheet	2In Stock	HK$412.64 HK$402.12 HK$393.49 HK$379.19 Quote Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MOM SLGP SLDR 51-151.025 EAO 1: HK$296.00 11In Stock	Mfr. Part No. 51-151.025 Mouser Part No 123-51-151.025	EAO	Switch Actuators LPB SQ MOM SLGP SLDR Learn More about EAO series 51 switches	Datasheet	11In Stock	HK$296.00 HK$288.69 View Quote	Min.: 1 Mult.: 1
Switch Fixings LPB ACTUATOR REC 51-165.0 EAO 1: HK$162.02 51In Stock	Mfr. Part No. 51-165.0 Mouser Part No 123-51-165.0	EAO	Switch Fixings LPB ACTUATOR REC Learn More about EAO series 51 switches	Datasheet	51In Stock	HK$162.02 HK$161.93 HK$158.97 HK$153.39 View HK$151.41 Quote	Min.: 1 Mult.: 1
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 1N.C 51-256.026 EAO 1: HK$277.43 14In Stock	Mfr. Part No. 51-256.026 Mouser Part No 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	HK$277.43 HK$274.05 HK$271.01 HK$249.48 HK$244.79	Min.: 1 Mult.: 1
Switch Actuators LPB REC MNT SLGP QC 51-261.022 EAO 1: HK$366.78 4In Stock	Mfr. Part No. 51-261.022 Mouser Part No 123-51-261.022	EAO	Switch Actuators LPB REC MNT SLGP QC Learn More about EAO series 51 switches	Datasheet	4In Stock	HK$366.78 HK$366.69 HK$357.73 View Quote	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MNT SLGP SLDR 51-261.025 EAO 1: HK$314.91 4In Stock	Mfr. Part No. 51-261.025 Mouser Part No 123-51-261.025	EAO	Pushbutton Switches - Industrial LPB REC MNT SLGP SLDR Learn More about EAO series 51 switches	Datasheet	4In Stock	HK$314.91 HK$314.83 HK$306.77 HK$300.28 View HK$289.34 Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MNT SLGP SLDR 51-262.025 EAO 1: HK$439.77 4In Stock	Mfr. Part No. 51-262.025 Mouser Part No 123-51-262.025	EAO	Switch Actuators LPB REC MNT SLGP SLDR Learn More about EAO series 51 switches	Datasheet	4In Stock	HK$439.77 HK$430.56 HK$421.44 HK$412.56 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MNT SLGP SLDR 51-281.025 EAO 1: HK$377.87 3In Stock	Mfr. Part No. 51-281.025 Mouser Part No 123-51-281.025	EAO	Switch Actuators LPB SQ MNT SLGP SLDR Learn More about EAO series 51 switches	Datasheet	3In Stock	HK$377.87 HK$314.91 HK$306.77 HK$300.19 View HK$294.28 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-135.025D EAO 1: HK$651.68 2In Stock	Mfr. Part No. 51-135.025D Mouser Part No 123-51-135.025D	EAO	Keylock Switches KYLK RND MNT 2POS Learn More about EAO series 51 switches	Datasheet	2In Stock	HK$651.68 HK$651.60 HK$636.72 HK$624.56 View HK$604.42 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK REC MNT 2POS 51-195.022D EAO 1: HK$621.51 10In Stock	Mfr. Part No. 51-195.022D Mouser Part No 123-51-195.022D	EAO	Keylock Switches KYLK REC MNT 2POS Learn More about EAO series 51 switches	Datasheet	10In Stock	HK$621.51 HK$610.42 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-421.036 EAO 1: HK$314.58 34In Stock	Mfr. Part No. 51-421.036 Mouser Part No 123-51-421.036	EAO	Switch Actuators LPB REC MOM GD UNV LL Learn More about EAO series 51 switches	Datasheet	34In Stock	HK$314.58 HK$314.50	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-423.036 EAO 1: HK$314.58 1In Stock	Mfr. Part No. 51-423.036 Mouser Part No 123-51-423.036	EAO	Switch Actuators LPB REC MOM GD UNV LL Learn More about EAO series 51 switches	Datasheet	1In Stock	HK$314.58 HK$306.52 HK$297.73 HK$291.73 Quote Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-425.036 EAO 1: HK$201.88 17In Stock	Mfr. Part No. 51-425.036 Mouser Part No 123-51-425.036	EAO	Switch Actuators LPB REC MOM GD UNV LL Learn More about EAO series 51 switches	Datasheet	17In Stock	HK$201.88 HK$198.27 HK$193.99 HK$188.73 Quote Quote	Min.: 1 Mult.: 1
Switch Bezels / Switch Caps LENS REC FLT TLT WHT 51-901.9 EAO 1: HK$27.54 143In Stock 141On Order	Mfr. Part No. 51-901.9 Mouser Part No 123-51-901.9	EAO	Switch Bezels / Switch Caps LENS REC FLT TLT WHT Learn More about EAO series 51 switches	Datasheet	143In Stock 141On Order On Order Ship Dates Mfr. No: 51-901.9 Stock: 143 Can Dispatch Immediately On Order: 110 Expected 16/10/2026 31 Expected 19/10/2026 Factory Lead Time: 15 Weeks	HK$27.54 HK$27.45	Min.: 1 Mult.: 1

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Series 51 Switch Range

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Series 51 Switch Range

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