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.

All Results (59)

Select Image Part # Mfr. Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity. Qty. RoHS


Molex Automotive Connectors MX123 WIRE DRESS COVER 66/73/80 CKT 17,171In Stock
5,174On Order
$0.67
$0.583
$0.533
$0.481
Min.: 1
Mult.: 1
Molex 216741-0004
Molex Automotive Connectors MX123 HRN CONN ASSY 66 CKT OPT9 KEY C/66 121In Stock
$5.82
$5.29
$5.02
$4.90
Min.: 1
Mult.: 1
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) 2,724In Stock
$12.70
$9.21
$8.98
$8.75
Min.: 1
Mult.: 1
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) 1,089In Stock
$22.23
$20.25
$19.95
$19.02
Min.: 1
Mult.: 1
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) 1,062In Stock
$6.57
$6.11
$5.77
$4.71
Min.: 1
Mult.: 1


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) 968In Stock
$7.23
$5.38
$5.13
$5.04
Min.: 1
Mult.: 1
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) 814In Stock
$14.54
$13.37
$13.19
$13.00
Min.: 1
Mult.: 1
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) 909In Stock
$17.57
$16.56
$15.08
$14.62
Min.: 1
Mult.: 1
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) 942In Stock
$13.66
$11.54
$11.46
$11.38
Min.: 1
Mult.: 1
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) 741In Stock
$16.56
$14.60
$14.44
$14.33
Min.: 1
Mult.: 1
Molex Automotive Connectors MX64 F TERM 22 AWG B WIND REEL OF 1000
15,000In Stock
Reel
$0.07
$0.068
Min.: 1,000
Mult.: 1,000
: 1,000
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) 80In Stock
$16.62
$15.63
$15.16
$14.76
Min.: 1
Mult.: 1
Molex Automotive Connectors MX123 0.64mm Grommet Seal Plug 498,737In Stock
$0.12
$0.10
$0.089
$0.085
Min.: 1
Mult.: 1
Molex Crimpers / Crimping Tools PremiumGrade Hand Crimp Tool for 2.54mm MX64 Terminals, 22-18 AWG 33In Stock
$762.43
$725.55
$716.34
Min.: 1
Mult.: 1
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) 1,874In Stock
$12.99
$11.59
$11.34
$10.89
Min.: 1
Mult.: 1


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) 610In Stock
$8.25
$8.21
$8.05
$6.63
Min.: 1
Mult.: 1
Molex Automotive Connectors 2.54mm Pit. MX64 Terminal, Gold (Au) Pltg, 22 AWG, Left Reel Payoff, Also used w/ MX123 Female Recept. Housing
20,000In Stock
Reel
$0.098
Min.: 10,000
Mult.: 10,000
: 10,000
Molex Automotive Connectors 2.54mm Pit. MX64 Terminal, Gold (Au) Pltg, 20-18 AWG, Right Reel Payoff, Also used w/ MX123 Female Recept. Housing
36,000In Stock
216,000Expected 12/31/2026
Reel
$0.094
Min.: 9,000
Mult.: 9,000
: 9,000
Molex Automotive Connectors MX150 Mat-Sealed Male Conn. Assy., Dual Row, 12 Pos., Keying Option C, w/out Conn. Pos. Assurance, Dark Gray 994In Stock
$3.52
$3.00
$2.68
$2.55
Min.: 1
Mult.: 1
Molex Automotive Connectors MX123 73/80 Circuit Dress Cover 4,609In Stock
5,200Expected 11/16/2026
$1.88
$1.67
$1.55
$1.30
Min.: 1
Mult.: 1
Molex Extraction, Removal & Insertion Tools Extraction Tool for SPOX, MX64, Ditto, MX150CE, Milli-Grid Terminals 102In Stock
$86.16
$80.94
$78.34
$74.73
Min.: 1
Mult.: 1
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) 487In Stock
$7.02
$6.89
$6.88
$6.87
Min.: 1
Mult.: 1
Molex Automotive Connectors MX64 F TERM 18-20AWG B WIND Loose PC
26,748In Stock
$0.25
$0.215
$0.19
$0.178
Min.: 1
Mult.: 1
Molex Automotive Connectors MX123 49/56 Circuit Dress Cover 6,215In Stock
$0.56
$0.477
$0.399
$0.375
Min.: 1
Mult.: 1
Molex Crimpers / Crimping Tools Hand Tool for MX64 ISO Terminal 13In Stock
15Expected 12/2/2026
$594.92
$551.47
$533.77
Min.: 1
Mult.: 1