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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 (USD) 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: $115.18 7In 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	7In Stock	$115.18 $99.32 $94.58 $89.50 View $85.59 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-235.022D EAO 1: $86.44 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	$86.44 $77.32 $73.87 $72.46 View $70.11 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-236.025D EAO 1: $85.50 28In 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	28In Stock	$85.50 $83.54 $81.94 $79.29 View Quote	Min.: 1 Mult.: 1
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 2N.C 51-252.026 EAO 1: $40.02 76In 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	76In Stock	$40.02 $39.09 $38.82	Min.: 1 Mult.: 1
Keylock Switches KYLK SQ MNT 2POS 51-255.022D EAO 1: $75.61 36In 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	36In Stock	$75.61 $73.08 $72.58 $70.68 View Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-235.025D EAO 1: $69.30 45In Stock 54On Order	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	45In Stock 54On Order On Order Ship Dates Mfr. #: 51-235.025D Stock: 45 Can Ship Immediately On Order: 22 Pending 32 Expected 11/17/2026 Factory Lead-Time: 16 Weeks	$69.30 $67.70 $66.41 $64.34 View Quote	Min.: 1 Mult.: 1
Switch Cases / Switch Covers protect COVER-REC 51-925 EAO 1: $6.31 348In Stock 549On 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	348In Stock 549On Order On Order Ship Dates Mfr. #: 51-925 Stock: 348 Can Ship Immediately On Order: 18 Expected 9/22/2026 511 Expected 9/28/2026 20 Expected 10/22/2026 Factory Lead-Time: 15 Weeks	$6.31 $6.30 $6.27 $6.19	Min.: 1 Mult.: 1
Panel Mount Indicator Housings & Hardware IND REC BLK QC 51-040.002 EAO 1: $11.74 48In 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	48In Stock	$11.74 $11.72 $11.15 $10.96 View Quote	Min.: 1 Mult.: 1
Panel Mount Indicator Housings & Hardware IND REC BLK SLDR 51-040.005 EAO 1: $11.74 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	$11.74 $11.72 $11.15 $10.96 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM SLGP QC 51-121.022 EAO 1: $38.84 16In Stock 21Expected 10/27/2026	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	16In Stock 21Expected 10/27/2026	$38.84 $37.85 $37.33 $36.69 View Quote	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-121.025 EAO 1: $34.85 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	$34.85 $34.84 $34.05 $30.91 $30.75	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MOM SLGP SLDR 51-122.025 EAO 1: $50.20 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	$50.20 $48.92 $47.87 $46.13 Quote Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MOM SLGP SLDR 51-151.025 EAO 1: $36.01 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	$36.01 $35.12 View Quote	Min.: 1 Mult.: 1
Switch Hardware LPB ACTUATOR REC 51-165.0 EAO 1: $19.71 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	$19.71 $19.70 $19.34 $18.66 View $18.42 Quote	Min.: 1 Mult.: 1
Switch Actuators STP SWTC W-ANTI TWIST RELEASE 1N.C 51-256.026 EAO 1: $33.75 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	$33.75 $33.19 $33.10 $32.97 View $32.77 Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MNT SLGP QC 51-261.022 EAO 1: $44.62 5In 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	5In Stock	$44.62 $44.61 $43.52 View Quote	Min.: 1 Mult.: 1
Pushbutton Switches - Industrial LPB REC MNT SLGP SLDR 51-261.025 EAO 1: $38.31 5In 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	5In Stock	$38.31 $38.30 $37.32 $36.53 View $35.20 Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MNT SLGP SLDR 51-262.025 EAO 1: $53.50 5In 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	5In Stock	$53.50 $52.38 $51.27 $50.19 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB SQ MNT SLGP SLDR 51-281.025 EAO 1: $45.97 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	$45.97 $38.31 $37.32 $36.52 View $35.80 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK RND MNT 2POS 51-135.025D EAO 1: $79.28 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	$79.28 $79.27 $77.46 $75.98 View $73.53 Quote	Min.: 1 Mult.: 1
Keylock Switches KYLK REC MNT 2POS 51-195.022D EAO 1: $75.61 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	$75.61 $74.26 View Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-421.036 EAO 1: $38.27 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	$38.27 $38.26	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-423.036 EAO 1: $38.27 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	$38.27 $37.29 $36.22 $35.49 Quote Quote	Min.: 1 Mult.: 1
Switch Actuators LPB REC MOM GD UNV LL 51-425.036 EAO 1: $24.56 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	$24.56 $24.12 $23.60 $22.96 Quote Quote	Min.: 1 Mult.: 1
Switch Bezels / Switch Caps LENS REC FLT TLT WHT 51-901.9 EAO 1: $3.35 129In Stock 155On Order	Mfr. Part # 51-901.9 Mouser Part # 123-51-901.9	EAO	Switch Bezels / Switch Caps LENS REC FLT TLT WHT Learn More about EAO series 51 switches	Datasheet	129In Stock 155On Order On Order Ship Dates Mfr. #: 51-901.9 Stock: 129 Can Ship Immediately On Order: 14 Expected 10/12/2026 31 Expected 10/27/2026 110 Expected 12/22/2026 Factory Lead-Time: 15 Weeks	$3.35 $3.34	Min.: 1 Mult.: 1

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Series 51 Switch Range

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