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4 mm Electromechanical

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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.
Circuit Board Hardware - PCB S70 SMT Spring Contact 5mm high S7051-42R Harwin 1: £0.39 7,106In Stock 75,600On Order	Mfr. Part No. S7051-42R Mouser Part No 855-S7051-42R	Harwin	Circuit Board Hardware - PCB S70 SMT Spring Contact 5mm high Learn More about Harwin spring contacts	Datasheet	7,106In Stock 75,600On Order On Order Ship Dates Mfr. No: S7051-42R Stock: 7,106 Can Dispatch Immediately On Order: 18,200 Expected 10/11/2026 57,400 Expected 16/02/2027 Factory Lead Time: 15 Weeks	Cut Tape £0.39 £0.297 £0.246 £0.228 Reel £0.215 View £0.201 £0.19 £0.185 MouseReel Available	Min.: 1 Mult.: 1 : 1,400
Solid State Relays - SSRs Solid State Relay G3NA-210BL DC5-24 Omron Automation and Safety 1: £36.96 5In Stock	Mfr. Part No. G3NA-210BL DC5-24 Mouser Part No 653-G3NA-210BLDC5-24	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	5In Stock	£36.96 £31.50 £30.97 £30.43 View £29.90 £29.27 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay G3NA-205B-UTU AC100-240 Omron Automation and Safety 1: £43.68 4In Stock	Mfr. Part No. G3NA-205B-UTU AC100-240 Mouser Part No 653-G3NA205BUTAC1240	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	4In Stock	£43.68 £42.18 £41.51 £40.80 View £40.19 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay G3NA-210B-UTU AC100-240 Omron Automation and Safety 1: £49.97 1In Stock 11Expected 03/11/2026	Mfr. Part No. G3NA-210B-UTU AC100-240 Mouser Part No 653-G3NA210BUTAC1240	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	1In Stock 11Expected 03/11/2026	£49.97 £47.22 £45.43 £43.86 View £42.35 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay G3NA-220B-UTU AC100-240 Omron Automation and Safety 1: £49.97 14In Stock	Mfr. Part No. G3NA-220B-UTU AC100-240 Mouser Part No 653-G3NA220BUTAC1240	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	14In Stock	£49.97 £48.53 £44.39 £43.17 View £42.08 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay G3NA-225B-UTU AC100-240 Omron Automation and Safety 1: £49.97 21In Stock	Mfr. Part No. G3NA-225B-UTU AC100-240 Mouser Part No 653-G3NA225BUTAC1240	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	21In Stock	£49.97 £47.22 £45.43 £43.86 View £42.35 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs SOLID STATE RELAY TUV Markings G3NA-240B-UTU DC5-24 Omron Automation and Safety 1: £78.07 10In Stock	Mfr. Part No. G3NA-240B-UTU DC5-24 Mouser Part No 653-G3NA240BUTUDC524	Omron Automation and Safety	Solid State Relays - SSRs SOLID STATE RELAY TUV Markings	Datasheet	10In Stock	£78.07 £75.95 £72.87 £70.36 View £69.60 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay G3NA-420B-UTU DC5-24 Omron Automation and Safety 1: £79.71 5In Stock	Mfr. Part No. G3NA-420B-UTU DC5-24 Mouser Part No 653-G3NA420BUTDC524	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	5In Stock	£79.71 £74.86 £72.58 £70.78 £68.61	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay,RoHS G3NA-475B-UTU-2 DC5-24 Omron Automation and Safety 1: £121.97 2In Stock	Mfr. Part No. G3NA-475B-UTU-2 DC5-24 Mouser Part No 653-G3NA475BUTU2DC24	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay,RoHS	Datasheet	2In Stock	£121.97 £106.08 £103.39 £101.35 View £101.06 Quote	Min.: 1 Mult.: 1
Solid State Relays - SSRs Solid State Relay G3NA-D210B-UTU AC100-240 Omron Automation and Safety 1: £75.49 6In Stock	Mfr. Part No. G3NA-D210B-UTU AC100-240 Mouser Part No 653-G3NAD210BUTAC124	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay	Datasheet	6In Stock	£75.49 £71.08 £67.88 £65.32 £63.28	Min.: 1 Mult.: 1
Microphones ELECTRET CONDENSER MICROPHONE -35DB ROM-2235L-HD-R PUI Audio 1: £3.13 523In Stock	Mfr. Part No. ROM-2235L-HD-R Mouser Part No 665-ROM-2235L-HD-R	PUI Audio	Microphones ELECTRET CONDENSER MICROPHONE -35DB Learn More about PUI Audio pui hd condenser microphones	Datasheet	523In Stock	£3.13 £2.28 £2.02 £1.80 View £1.58 £1.48 £1.42	Min.: 1 Mult.: 1
Speakers & Transducers ELECTROMAGNETIC 2-4 AC VPP 70DB 4000HZ 4X4X2 AST0440MFD-03TRQ Mallory Sonalert 1: £3.55 2,907In Stock	Mfr. Part No. AST0440MFD-03TRQ Mouser Part No 539-AST0440MFD-03TRQ	Mallory Sonalert	Speakers & Transducers ELECTROMAGNETIC 2-4 AC VPP 70DB 4000HZ 4X4X2 Learn More about Mallory Sonalert transducers indicators	Datasheet	2,907In Stock	Cut Tape £3.55 £2.72 £2.45 £2.28 View Reel £1.84 £2.11 £1.96 £1.84 £1.84	Min.: 1 Mult.: 1 : 3,000
Detector Switches SPST, ON-(OFF) Detect switch, 100mA @ 12V DC Gull Wing SMD Terminals, T&R 1,000 pc packaging CL-DA-1BB4-A2T Nidec Components 1: £0.899 581In Stock	Mfr. Part No. CL-DA-1BB4-A2T Mouser Part No 229-CL-DA-1BB4-A2T	Nidec Components	Detector Switches SPST, ON-(OFF) Detect switch, 100mA @ 12V DC Gull Wing SMD Terminals, T&R 1,000 pc packaging Learn More about Nidec Components nidec cl da detect switches	Datasheet	581In Stock	Cut Tape £0.899 £0.747 £0.694 £0.656 Reel £0.512 View £0.62 £0.574 £0.543 £0.484	Min.: 1 Mult.: 1 : 1,000
Detector Switches SPST, OFF-(ON) Detect switch, 100mA @ 12V DC Gull Wing SMD Terminals, T&R 1,000 pc packaging CL-DA-1CB4-A2T Nidec Components 1: £0.943 949In Stock 1,000Expected 27/01/2027	Mfr. Part No. CL-DA-1CB4-A2T Mouser Part No 229-CL-DA-1CB4-A2T	Nidec Components	Detector Switches SPST, OFF-(ON) Detect switch, 100mA @ 12V DC Gull Wing SMD Terminals, T&R 1,000 pc packaging Learn More about Nidec Components nidec cl da detect switches	Datasheet	949In Stock 1,000Expected 27/01/2027	Cut Tape £0.943 £0.796 £0.735 £0.695 Reel £0.542 View £0.656 £0.608 £0.544 £0.512	Min.: 1 Mult.: 1 : 1,000
Switch Bezels / Switch Caps ORANG 4X4 B3F KEYCAP B32-1020 Aratas 1: £0.308 3,047In Stock	Mfr. Part No. B32-1020 Mouser Part No 653-B32-1020	Aratas	Switch Bezels / Switch Caps ORANG 4X4 B3F KEYCAP	Datasheet	3,047In Stock	£0.308 £0.276 £0.265 £0.258 View £0.251 £0.241 £0.229 £0.217 £0.211	Min.: 1 Mult.: 1
Switch Bezels / Switch Caps Green 4x4 mm Key Top B32-1050 Aratas 1: £0.308 1,872In Stock 2,000Expected 22/01/2027 New At Mouser	Mfr. Part No. B32-1050 Mouser Part No 653-B32-1050 New At Mouser	Aratas	Switch Bezels / Switch Caps Green 4x4 mm Key Top	Datasheet	1,872In Stock 2,000Expected 22/01/2027	£0.308 £0.276 £0.265 £0.258 View £0.251 £0.241 £0.231 £0.217 £0.211	Min.: 1 Mult.: 1
Switch Bezels / Switch Caps LT GRN 4mm KEY CAP B32-1070 Aratas 1: £0.308 319In Stock	Mfr. Part No. B32-1070 Mouser Part No 653-B32-1070	Aratas	Switch Bezels / Switch Caps LT GRN 4mm KEY CAP	Datasheet	319In Stock	£0.308 £0.276 £0.265 £0.258 View £0.251 £0.241 £0.229 £0.177 £0.175	Min.: 1 Mult.: 1
Microphones ELECTRET CONDENSER MICROPHONE -27DB DOM-3027L-HD-R PUI Audio 1: £2.74 140In Stock	Mfr. Part No. DOM-3027L-HD-R Mouser Part No 665-DOM-3027L-HD-R	PUI Audio	Microphones ELECTRET CONDENSER MICROPHONE -27DB Learn More about PUI Audio pui hd condenser microphones	Datasheet	140In Stock	£2.74 £2.15 £1.97 £1.87 £1.57	Min.: 1 Mult.: 1
Microphones OMNI-DIRECTIONAL MICROPHONE 4MM DIA TOM-1545L-LW100-R PUI Audio 1: £2.72 9In Stock	Mfr. Part No. TOM-1545L-LW100-R Mouser Part No 665-TOM1545LLW100R	PUI Audio	Microphones OMNI-DIRECTIONAL MICROPHONE 4MM DIA Learn More about PUI Audio microphone lead	Datasheet	9In Stock	£2.72 £2.07 £1.87 £1.72 View £1.60 £1.42 £1.35	Min.: 1 Mult.: 1
Microphones MICROPHONE -46DB 2VDC .5MA 2.2KOHM DUM-4546L-C3310-R PUI Audio 1: £2.07 98In Stock	Mfr. Part No. DUM-4546L-C3310-R Mouser Part No 665-DUM-4546L-C3310R	PUI Audio	Microphones MICROPHONE -46DB 2VDC .5MA 2.2KOHM	Datasheet	98In Stock	£2.07 £1.61 £1.45 £1.35 View £1.21 £1.11 £1.07	Min.: 1 Mult.: 1
Buzzers & Audio Indicators - Board Mount Buzzer 4mm sq 4kHz 3V SMT CMT-4023S-SMT-TR Same Sky 1: £2.93 22,000On Order	Mfr. Part No. CMT-4023S-SMT-TR Mouser Part No 490-CMT-4023S-SMT-TR	Same Sky	Buzzers & Audio Indicators - Board Mount Buzzer 4mm sq 4kHz 3V SMT Learn More about Same Sky cui magnetic piezo micro buzzers	Datasheet	22,000On Order On Order Ship Dates Mfr. No: CMT-4023S-SMT-TR Stock: 0 On Order: 1,000 Expected 30/10/2026 6,000 Expected 04/12/2026 6,000 Expected 05/02/2027 9,000 Expected 22/02/2027 Factory Lead Time: 18 Weeks	Cut Tape £2.93 £2.23 £2.00 £1.81 View Reel £1.26 £1.68 £1.55 £1.47 £1.28 £1.26 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Solid State Relays - SSRs Solid State Relay RoHS G3NA-450B-UTU-2DC5-24 Omron Automation and Safety 1: £114.62 Non-Stocked Lead-Time 3 Weeks	Mfr. Part No. G3NA-450B-UTU-2DC5-24 Mouser Part No 653-3NA450BUTU2DC524	Omron Automation and Safety	Solid State Relays - SSRs Solid State Relay RoHS	Datasheet	Non-Stocked Lead-Time 3 Weeks	£114.62 £102.08 £97.26 £94.13 View £94.10 Quote	Min.: 1 Mult.: 1
Tactile Switches SPST-NO G LEAD 300g KSC141G C&K 10,000: £0.176 Non-Stocked	Mfr. Part No. KSC141G Mouser Part No 611-KSC141G	C&K	Tactile Switches SPST-NO G LEAD 300g Learn More about C&K ck ksc tact switches	Datasheet	Non-Stocked	£0.176	Min.: 10,000 Mult.: 1
Mounting Fixings OCS PANEL 1614 PC 1562144 Phoenix Contact 1: £85.72 Non-Stocked Lead-Time 15 Weeks New Product	Mfr. Part No. 1562144 Mouser Part No 651-1562144 New Product	Phoenix Contact	Mounting Fixings OCS PANEL 1614 PC	Datasheet	Non-Stocked Lead-Time 15 Weeks	£85.72	Min.: 1 Mult.: 1
Mounting Fixings OCS PANEL 1816 PC 1562145 Phoenix Contact 1: £102.08 Non-Stocked Lead-Time 15 Weeks New Product	Mfr. Part No. 1562145 Mouser Part No 651-1562145 New Product	Phoenix Contact	Mounting Fixings OCS PANEL 1816 PC	Datasheet	Non-Stocked Lead-Time 15 Weeks	£102.08	Min.: 1 Mult.: 1