Automotive Connectors – Mouser United Kingdom

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MX123 Sealed Connectors

Molex MX123 Sealed Connection System is a fully sealed, high-performance system, designed for transportation power-train applications that require reliable connections in high-vibration under-the-hood environments. The MX123 sealed connection system from Molex meets GMW3191 specifications, ensuring this product can perform in very harsh, hot, high-vibration environments. This system utilizes matte-seal technology, creating an extremely resilient sealed connector system with a small package. Features include multiple polarization, wire-dress and PCB-tail options, and integrated TPA and CPA components, assisting in keeping the interface mated while freeing up valuable time in the assembly process.

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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.	Product	Accessory Type	Number of Positions	Pitch	Gender	Mounting Style	Termination Style	Contact Plating	Wire Gauge Min	Wire Gauge Max	Color	Series	Packaging
Automotive Connectors MX123 WIRE DRESS COVER 66/73/80 CKT 34565-0005 Molex 1: £0.503 17,026In Stock 5,274On Order New Product	Mfr. Part No. 34565-0005 Mouser Part No 538-34565-0005 New Product	Molex	Automotive Connectors MX123 WIRE DRESS COVER 66/73/80 CKT	Datasheet	17,026In Stock 5,274On Order On Order Ship Dates Mfr. No: 34565-0005 Stock: 17,026 Can Dispatch Immediately On Order: 1,200 Pending 3,800 Expected 09/11/2026 274 Expected 12/11/2026 Factory Lead Time: 11 Weeks	£0.503 £0.437 £0.40 £0.361 View £0.329 £0.272 £0.237 £0.222	Min.: 1 Mult.: 1												34565
Automotive Connectors MX123 HRN CONN ASSY 66 CKT OPT9 KEY C/66 Molex 216741-0004 216741-0004 Molex 1: £4.37 121In Stock New Product	Mfr. Part No. 216741-0004 Mouser Part No 538-216741-0004 New Product	Molex	Automotive Connectors MX123 HRN CONN ASSY 66 CKT OPT9 KEY C/66 Learn More about Molex mx123 sealed connectors	Datasheet	121In Stock	£4.37 £3.97 £3.77 £3.68 View £3.51 £3.06 £2.66 £2.59 £2.50	Min.: 1 Mult.: 1												216741
Automotive Connectors 2.54mm Pit., MX123 Header, 56 Pos. Shrouded Assy., Qty(56) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Au Mate Side Finish) 31386-2002 Molex 1: £9.53 2,724In Stock	Mfr. Part No. 31386-2002 Mouser Part No 538-31386-2002	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 56 Pos. Shrouded Assy., Qty(56) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Au Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	2,724In Stock	£9.53 £6.91 £6.74 £6.57 View £6.44 £6.12	Min.: 1 Mult.: 1	Headers		56 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Gray	31386
Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., (72) 0.64mm Square Sig Pins + (1) 2.8mm Pwr Blade, Harness Side Key Code A, Black (Au Mate Side Finish) 31387-2014 Molex 1: £16.69 1,089In Stock	Mfr. Part No. 31387-2014 Mouser Part No 538-31387-2014	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., (72) 0.64mm Square Sig Pins + (1) 2.8mm Pwr Blade, Harness Side Key Code A, Black (Au Mate Side Finish) Learn More about Molex transportation solutions	Datasheet	1,089In Stock	£16.69 £15.21 £14.98 £14.28 View £13.60 £13.02	Min.: 1 Mult.: 1	Headers		73 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Black	31387	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 80 Pos. Shrouded Assy., Qty(80) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Ag Mate Side Finish) 31387-4018 Molex 1: £5.43 968In Stock	Mfr. Part No. 31387-4018 Mouser Part No 538-31387-4018	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 80 Pos. Shrouded Assy., Qty(80) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Ag Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	968In Stock	£5.43 £4.04 £3.85 £3.78 View £3.68 £3.52 £3.47	Min.: 1 Mult.: 1	Headers		80 Position	2.54 mm (0.1 in)	Plug (Male)	SMD/SMT	Solder Pin	Silver			Gray	31387
Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code C, Blue (Ag Mate Side Finish) 31387-8006 Molex 1: £4.93 1,062In Stock	Mfr. Part No. 31387-8006 Mouser Part No 538-31387-8006	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code C, Blue (Ag Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	1,062In Stock	£4.93 £4.58 £4.33 £3.54 View £3.51 £3.49 £3.39 £3.22	Min.: 1 Mult.: 1	Headers		66 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Silver			Blue	31387
Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., (72) 0.64mm Square Sig Pins + (1) 2.8mm Pwr Blade, Harness Side Key Code B, Gray (Au Mate Side Finish) 31387-2002 Molex 1: £13.63 909In Stock	Mfr. Part No. 31387-2002 Mouser Part No 538-31387-2002	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., (72) 0.64mm Square Sig Pins + (1) 2.8mm Pwr Blade, Harness Side Key Code B, Gray (Au Mate Side Finish) Learn More about Molex transportation solutions	Datasheet	909In Stock	£13.63	Min.: 1 Mult.: 1	Headers		73 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Gray	31387	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 80 Pos. Shrouded Assy., (80) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Au Mate Side Finish) 31387-4009 Molex 1: £10.26 942In Stock	Mfr. Part No. 31387-4009 Mouser Part No 538-31387-4009	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 80 Pos. Shrouded Assy., (80) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Au Mate Side Finish) Learn More about Molex transportation solutions	Datasheet	942In Stock	£10.26 £8.66 £8.61 £8.55 View £8.46 £8.08	Min.: 1 Mult.: 1	Headers		80 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Gray	31387	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 80 Pos. Shrouded Assy., (80) 0.64mm Square Sig Pins, Harness Side Key Code G, Blue (Au Mate Side Finish) 31387-4001 Molex 1: £12.43 741In Stock	Mfr. Part No. 31387-4001 Mouser Part No 538-31387-4001	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 80 Pos. Shrouded Assy., (80) 0.64mm Square Sig Pins, Harness Side Key Code G, Blue (Au Mate Side Finish) Learn More about Molex transportation solutions	Datasheet	741In Stock	£12.43 £10.96 £10.84 £10.76 View £9.80 £8.09 £8.08	Min.: 1 Mult.: 1	Headers		80 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Blue	31387	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code A, Black (Au Mate Side Finish) 31387-8001 Molex 1: £10.91 814In Stock	Mfr. Part No. 31387-8001 Mouser Part No 538-31387-8001	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code A, Black (Au Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	814In Stock	£10.91 £10.04 £9.90 £9.76 View £9.52 £8.10 £7.19	Min.: 1 Mult.: 1	Headers		66 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Black	31387
Automotive Connectors MX64 F TERM 22 AWG B WIND REEL OF 1000 33468-0001 (Mouser Reel) Molex 1,000: £0.052 15,000In Stock	Mfr. Part No. 33468-0001 (Mouser Reel) Mouser Part No 538-33468-0001-MR	Molex	Automotive Connectors MX64 F TERM 22 AWG B WIND REEL OF 1000 Learn More about Molex mx64 sealed connectors	Datasheet	15,000In Stock	Reel £0.052 £0.051	Min.: 1,000 Mult.: 1,000 : 1,000	Terminals			2.54 mm (0.1 in)	Socket (Female)	Cable Mount / Free Hanging	Crimp	Tin		22 AWG		33468	Reel
Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., (72) 0.64mm Square Sig Pins + (1) 2.8mm Pwr Blade, Harness Side Key Code C, Blue (Au Mate Side Finish) 31387-2003 Molex 1: £12.48 80In Stock	Mfr. Part No. 31387-2003 Mouser Part No 538-31387-2003	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., (72) 0.64mm Square Sig Pins + (1) 2.8mm Pwr Blade, Harness Side Key Code C, Blue (Au Mate Side Finish) Learn More about Molex transportation solutions	Datasheet	80In Stock	£12.48 £11.73 £11.50	Min.: 1 Mult.: 1	Headers		73 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Blue	31387
Automotive Connectors MX123 0.64mm Grommet Seal Plug 34586-0001 Molex 1: £0.09 495,837In Stock	Mfr. Part No. 34586-0001 Mouser Part No 538-34586-0001	Molex	Automotive Connectors MX123 0.64mm Grommet Seal Plug Learn More about Molex mx64 sealed connectors	Datasheet	495,837In Stock	£0.09 £0.075 £0.067 £0.064 View £0.057 £0.054 £0.051	Min.: 1 Mult.: 1	Accessories	Connector Seal			Plug (Male)						Gray	34586
Automotive Connectors 2.54mm Pit., MX123 Header, 56 Pos. Shrouded Assy., (56) 0.64mm Square Sig Pins, Harness Side Key Code G, Blue (Au Mate Side Finish) 31386-2001 Molex 1: £9.75 1,873In Stock	Mfr. Part No. 31386-2001 Mouser Part No 538-31386-2001	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 56 Pos. Shrouded Assy., (56) 0.64mm Square Sig Pins, Harness Side Key Code G, Blue (Au Mate Side Finish) Learn More about Molex transportation solutions	Datasheet	1,873In Stock	£9.75 £8.70 £8.51 £8.18 View £7.88 £7.09 £7.08 £6.81 Quote	Min.: 1 Mult.: 1	Headers		56 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Blue	31386	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., Qty(72) 0.64mm Square Sig Pins + Qty(1) 2.8mm Pwr Blade, Harness Side Key Code A, Black (Ag Mate Side Finish) 31387-2034 Molex 1: £6.20 598In Stock	Mfr. Part No. 31387-2034 Mouser Part No 538-31387-2034	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., Qty(72) 0.64mm Square Sig Pins + Qty(1) 2.8mm Pwr Blade, Harness Side Key Code A, Black (Ag Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	598In Stock	£6.20 £6.16 £6.04 £4.98 View £4.71 £3.90 £3.82	Min.: 1 Mult.: 1	Headers		73 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Silver			Black	31387
Automotive Connectors 2.54mm Pit. MX64 Terminal, Gold (Au) Pltg, 22 AWG, Left Reel Payoff, Also used w/ MX123 Female Recept. Housing 33467-0004 Molex 10,000: £0.073 20,000In Stock	Mfr. Part No. 33467-0004 Mouser Part No 538-33467-0004	Molex	Automotive Connectors 2.54mm Pit. MX64 Terminal, Gold (Au) Pltg, 22 AWG, Left Reel Payoff, Also used w/ MX123 Female Recept. Housing Learn More about Molex mx64 sealed connectors	Datasheet	20,000In Stock	Reel £0.073	Min.: 10,000 Mult.: 10,000 : 10,000	Terminals				Socket (Female)	Cable Mount / Free Hanging	Crimp	Gold		22 AWG		33467	Reel
Automotive Connectors 2.54mm Pit. MX64 Terminal, Gold (Au) Pltg, 20-18 AWG, Right Reel Payoff, Also used w/ MX123 Female Recept. Housing 33467-0005 Molex 9,000: £0.071 36,000In Stock 216,000Expected 31/12/2026	Mfr. Part No. 33467-0005 Mouser Part No 538-33467-0005	Molex	Automotive Connectors 2.54mm Pit. MX64 Terminal, Gold (Au) Pltg, 20-18 AWG, Right Reel Payoff, Also used w/ MX123 Female Recept. Housing Learn More about Molex mx64 sealed connectors	Datasheet	36,000In Stock 216,000Expected 31/12/2026	Reel £0.071	Min.: 9,000 Mult.: 9,000 : 9,000	Terminals				Socket (Female)	Cable Mount / Free Hanging	Crimp	Gold	20 AWG	18 AWG		33467	Reel
Automotive Connectors MX150 Mat-Sealed Male Conn. Assy., Dual Row, 12 Pos., Keying Option C, w/out Conn. Pos. Assurance, Dark Gray 33482-6261 Molex 1: £2.65 994In Stock	Mfr. Part No. 33482-6261 Mouser Part No 538-33482-6261	Molex	Automotive Connectors MX150 Mat-Sealed Male Conn. Assy., Dual Row, 12 Pos., Keying Option C, w/out Conn. Pos. Assurance, Dark Gray Learn More about Molex _mx150	Datasheet	994In Stock	£2.65 £2.25 £2.01 £1.91 View £1.80 £1.65 £1.58 £1.46 £1.43	Min.: 1 Mult.: 1	Connectors		12 Position	3.5 mm (0.138 in)	Plug (Male)	Cable Mount / Free Hanging	Crimp				Gray	33482
Automotive Connectors MX123 73/80 Circuit Dress Cover 34565-0003 Molex 1: £1.41 4,609In Stock 5,200Expected 16/11/2026	Mfr. Part No. 34565-0003 Mouser Part No 538-34565-0003	Molex	Automotive Connectors MX123 73/80 Circuit Dress Cover Learn More about Molex transportation solutions	Datasheet	4,609In Stock 5,200Expected 16/11/2026	£1.41 £1.26 £1.16 £0.978 View £0.917 £0.882 £0.811 £0.791	Min.: 1 Mult.: 1	Accessories	Cover									Black	34565	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., Qty(72) 0.64mm Square Sig Pins + Qty(1) 2.8mm Pwr Blade, Harness Side Key Code B, Gray (Ag Mate Side Finish) 31387-2032 Molex 1: £5.27 487In Stock	Mfr. Part No. 31387-2032 Mouser Part No 538-31387-2032	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 73 Pos. Shrouded Assy., Qty(72) 0.64mm Square Sig Pins + Qty(1) 2.8mm Pwr Blade, Harness Side Key Code B, Gray (Ag Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	487In Stock	£5.27 £5.18 £5.17 £5.16 View £5.15 £4.96 £4.13 £3.25 £3.24	Min.: 1 Mult.: 1	Headers		73 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Silver			Gray	31387
Automotive Connectors MX64 F TERM 18-20AWG B WIND Loose PC 33467-0005 (Loose Piece) Molex 1: £0.188 26,748In Stock	Mfr. Part No. 33467-0005 (Loose Piece) Mouser Part No 538-33467-0005-LP	Molex	Automotive Connectors MX64 F TERM 18-20AWG B WIND Loose PC Learn More about Molex mx64 sealed connectors	Datasheet	26,748In Stock	£0.188 £0.162 £0.142 £0.134	Min.: 1 Mult.: 1	Terminals			2.54 mm (0.1 in)	Socket (Female)	Cable Mount / Free Hanging	Crimp	Gold	20 AWG	18 AWG		33467	Bulk
Automotive Connectors MX123 49/56 Circuit Dress Cover 34575-0003 Molex 1: £0.421 6,165In Stock	Mfr. Part No. 34575-0003 Mouser Part No 538-34575-0003	Molex	Automotive Connectors MX123 49/56 Circuit Dress Cover Learn More about Molex transportation solutions	Datasheet	6,165In Stock	£0.421 £0.358 £0.299 £0.282 View £0.271 £0.257 £0.227 £0.213 £0.207	Min.: 1 Mult.: 1	Accessories										Black	34575	Bulk
Automotive Connectors 2.54mm Pit., MX123 Header, 56 Pos. Shrouded Assy., Qty(56) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Ag Mate Side Finish) 31386-2021 Molex 1: £9.73 1In Stock	Mfr. Part No. 31386-2021 Mouser Part No 538-31386-2021	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 56 Pos. Shrouded Assy., Qty(56) 0.64mm Square Sig Pins, Harness Side Key Code H, Gray (Ag Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	1In Stock	£9.73 £9.43 £9.09 £8.72 View £4.36 £3.89 £3.70 £2.88 £2.85	Min.: 1 Mult.: 1	Headers		56 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Silver			Gray	31386
Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code C, Blue (Au Mate Side Finish) 31387-8003 Molex 1: £13.43 217In Stock	Mfr. Part No. 31387-8003 Mouser Part No 538-31387-8003	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code C, Blue (Au Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	217In Stock	£13.43 £13.34 £13.10 £12.88 View £12.67 £6.25 £6.01	Min.: 1 Mult.: 1	Headers		66 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Gold			Blue	31387
Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code A, Black (Ag Mate Side Finish) 31387-8004 Molex 1: £4.77 192In Stock	Mfr. Part No. 31387-8004 Mouser Part No 538-31387-8004	Molex	Automotive Connectors 2.54mm Pit., MX123 Header, 66 Pos. Shrouded Assy., Qty(64) 0.64mm Square Sig Pins + Qty(2) 2.8mm Pwr Blades, Harness Side Key Code A, Black (Ag Mate Side Finish) Learn More about Molex mx123 sealed connectors	Datasheet	192In Stock	£4.77 £4.05 £4.03 £3.20 View £3.04 £2.99	Min.: 1 Mult.: 1	Headers		66 Position	2.54 mm (0.1 in)	Pin (Male)	Through Hole	Solder Pin	Silver			Black	31387

MX123 Sealed Connectors

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MX123 Sealed Connectors

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