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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 (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
Switch Fixings LPB ACTUATOR REC 51-165.0 EAO 1: £18.59 51In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	51In Stock	£18.59 £18.58 £18.39 £18.03 View £17.91 Quote	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK RND MOM 3POS 51-378.AD EAO 1: £108.59 7In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	7In Stock	£108.59 £93.65 £89.18 £85.82	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB SQ MOM SLGP QC 51-151.022 EAO 1: £36.62 80In Stock Restricted Availability	Mfr. Part No. 51-151.022 Mouser Part No 123-51-151.022	EAO	Switch Actuators LPB SQ MOM SLGP QC Learn More about EAO series 51 switches Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	80In Stock	£36.62	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK RND MNT 2POS 51-235.022D EAO 1: £71.29 61In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	61In Stock	£71.29 £68.02 £66.02	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK RND MNT 2POS 51-236.025D EAO 1: £80.61 29In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	29In Stock	£80.61 £78.76 £77.26 £74.75 Quote Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 2N.C 51-252.026 EAO 1: £37.73 75In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	75In Stock	£37.73 £37.64 £36.52 £36.22	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK SQ MNT 2POS 51-255.022D EAO 1: £71.29 34In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	34In Stock	£71.29 £68.91 £68.56 £66.80 View Quote	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK RND MNT 2POS 51-235.025D EAO 1: £65.34 37In Stock Restricted Availability 32Expected 18/12/2026	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	37In Stock 32Expected 18/12/2026	£65.34 £65.18 £63.20 £62.33 View £60.63 Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Cases / Switch Covers protect COVER-REC 51-925 EAO 1: £5.95 604In Stock	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	604In Stock	£5.95	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM SLGP QC 51-121.022 EAO 1: £36.62 37In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	37In Stock	£36.62 £35.78 £35.76 £35.05 View Quote	Min.: 1 Mult.: 1 Restricted Availability
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-121.025 EAO 1: £32.86 16In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	16In Stock	£32.86 £32.50 £31.58 £29.50 £28.99	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB SQ MOM SLGP SLDR 51-151.025 EAO 1: £33.95 11In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	11In Stock	£33.95 £33.22 View Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 1N.C 51-256.026 EAO 1: £31.82 14In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	14In Stock	£31.82 £31.44 £31.09 £28.08	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB REC MNT SLGP QC 51-261.022 EAO 1: £42.07 4In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	4In Stock	£42.07 £42.06 £41.15 View Quote	Min.: 1 Mult.: 1 Restricted Availability
Pushbutton Switches - Industrial LPB REC MNT SLGP SLDR 51-261.025 EAO 1: £36.12 4In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	4In Stock	£36.12 £36.11 £35.19 £34.44 View £33.19 Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB SQ MNT SLGP SLDR 51-281.025 EAO 1: £43.34 3In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	3In Stock	£43.34 £36.12 £35.19 £34.43 View £33.75 Quote	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK RND MNT 2POS 51-135.025D EAO 1: £74.75 2In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	2In Stock	£74.75 £74.74 £73.04 £71.64 View £69.32 Quote	Min.: 1 Mult.: 1 Restricted Availability
Keylock Switches KYLK REC MNT 2POS 51-195.022D EAO 1: £71.29 10In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	10In Stock	£71.29 £71.28 View Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB REC MOM GD UNV LL 51-421.036 EAO 1: £36.08 34In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	34In Stock	£36.08 £35.66 Quote Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB REC MOM GD UNV LL 51-423.036 EAO 1: £36.08 1In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	1In Stock	£36.08 £35.16 £34.15 £33.46 Quote Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Actuators LPB REC MOM GD UNV LL 51-425.036 EAO 1: £23.15 12In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	12In Stock	£23.15 £22.74 £22.25 £21.65 Quote Quote	Min.: 1 Mult.: 1 Restricted Availability
Switch Bezels / Switch Caps LENS REC FLT TLT WHT 51-901.9 EAO 1: £3.16 184In Stock Restricted Availability	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 Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	184In Stock	£3.16 £3.09 £2.95	Min.: 1 Mult.: 1 Restricted Availability
Switch Bezels / Switch Caps LENS REC FLT TPT RED 51-903.2 EAO 1: £3.16 107In Stock Restricted Availability	Mfr. Part No. 51-903.2 Mouser Part No 123-51-903.2	EAO	Switch Bezels / Switch Caps LENS REC FLT TPT RED Learn More about EAO series 51 switches Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	107In Stock	£3.16 £3.14	Min.: 1 Mult.: 1 Restricted Availability
Switch Bezels / Switch Caps LENS RECT ORANGE TPT ORNG 51-903.3 EAO 1: £3.16 15In Stock Restricted Availability	Mfr. Part No. 51-903.3 Mouser Part No 123-51-903.3	EAO	Switch Bezels / Switch Caps LENS RECT ORANGE TPT ORNG Learn More about EAO series 51 switches Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	15In Stock	£3.16 £3.09 £2.95	Min.: 1 Mult.: 1 Restricted Availability
Switch Bezels / Switch Caps LENS REC FLT TPT YLW 51-903.4 EAO 1: £3.16 14In Stock Restricted Availability 85On Order	Mfr. Part No. 51-903.4 Mouser Part No 123-51-903.4	EAO	Switch Bezels / Switch Caps LENS REC FLT TPT YLW Learn More about EAO series 51 switches Product available only to OEM/EMS and design business customers. Product is not shipped to consumers in the EU or the UK	Datasheet	14In Stock 85On Order On Order Ship Dates Mfr. No: 51-903.4 Stock: 14 Can Dispatch Immediately On Order: 40 Expected 09/11/2026 45 Expected 11/11/2026 Factory Lead Time: 15 Weeks	£3.16 £3.15 £3.04 £2.92 View £2.85 £2.84	Min.: 1 Mult.: 1 Restricted Availability

Series 51 Switch Range

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Series 51 Switch Range

Types of Electromechanical