KK Connectors

Molex KK Interconnection System consists of connectors that form the building block for creating thousands of different configurations. This system offers polarization features that ensure correct mating. The system incorporates offset header entry holes that provide +180°C polarization and allows both power and signal to carry through the same housing. This connector system also enables loading with optional polarization keys and pegs that ensure the one-way mating of headers and housings. Molex KK Interconnection System comes with customizable KK headers that offer more polarization options and design configurations. These include headers with voided pins, customized pin lengths, kinked PC tails, and varying tin or gold plating options.

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Description Datasheet Availability Pricing (CAD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Product
Type
Number of Positions
Pitch
Number of Rows
Mounting Style
Termination Style
Mounting Angle
Contact Gender
Contact Plating
Mating Post Length
Termination Post Length
Series
Tradename
Application
Wire Gauge
Minimum Operating Temperature
Maximum Operating Temperature
Packaging
Molex Headers & Wire Housings REELED TERMINALS Reel of 7000
Datasheet
Product Comments
42,000In Stock
Min.: 7,000
Mult.: 7,000
: 7,000

Contacts Crimp Socket (Female) Gold 4809 KK Wire-to-Board, Signal 30 AWG Reel
Molex Headers & Wire Housings KK Hdr RA 2 Ckt 2.54mm Pitch 15um Au
Datasheet
35,928In Stock
Min.: 1
Mult.: 1

Headers Locking 2 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Right Angle Pin (Male) Gold 6.73 mm (0.265 in) 2.54 mm (0.1 in) 171857 KK Wire-to-Board - 40 C + 105 C Bulk
Molex Headers & Wire Housings PCB BOTTOM ENTRY 8P
Datasheet
13,787In Stock
Min.: 1
Mult.: 1

Headers Socket Assembly 8 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Bottom Entry Socket (Female) Gold 4455 KK Tray
Molex Headers & Wire Housings KK 100 Hdr Assy Bkwy Bkwy 06 Ckt 30 SGold
Datasheet
24,544In Stock
Min.: 1
Mult.: 1

Headers Breakaway 6 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 42375 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings RA SMT B/A HDR 4P
Datasheet
47,494In Stock
24,000Expected 2026-08-12
Min.: 1
Mult.: 1

Headers Breakaway 4 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Right Angle Pin (Male) Gold 6.2 mm (0.244 in) 3.05 mm (0.12 in) 42377 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings R/A PCB HDR 10 GOLD FRICTION LOCK
Datasheet
11,739In Stock
Min.: 1
Mult.: 1

Headers Locking 10 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Right Angle Pin (Male) Gold 6.71 mm (0.264 in) 3.58 mm (0.141 in) 7478 KK Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 4P VERT HDR 15u Au
Datasheet
47,357In Stock
Min.: 1
Mult.: 1

Headers Breakaway 4 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 3.05 mm (0.12 in) 42375 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings KK TERM 18-24G Reel of 7000
Datasheet
Product Comments
49,000In Stock
Min.: 7,000
Mult.: 7,000
: 7,000

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Gold 2478 KK Power 24 AWG to 18 AWG - 40 C + 85 C Reel
Molex Headers & Wire Housings 7 PIN HOUSING
Datasheet
25,390In Stock
Min.: 1
Mult.: 1

Wire Housings Receptacle Housing 7 Position 2.54 mm (0.1 in) 1 Row Cable Mount / Free Hanging Crimp Straight Socket (Female) 7880 KK High Pressure Bulk
Molex Headers & Wire Housings KK RPC 100 Hdr FrLk Vert02 Ckt 15Au T&R
Datasheet
2,075In Stock
Min.: 1
Mult.: 1
: 1,050

Headers Locking 2 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 7.44 mm (0.293 in) 2.34 mm (0.092 in) 171856 KK Wire-to-Board - 40 C + 105 C Reel, Cut Tape
Molex Headers & Wire Housings 2.54mm KK Hdr RA FricLK .5Au 8Ckt
Datasheet
2,491In Stock
Min.: 1
Mult.: 1

Headers Locking 8 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Right Angle Pin (Male) Gold 6.71 mm (0.264 in) 3.8 mm (0.15 in) 7395 KK Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 8P VERT HEADER Sn
Datasheet
17,963In Stock
Min.: 1
Mult.: 1

Headers Breakaway 8 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 42375 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 16P VERT HDR 15u Au
Datasheet
4,965In Stock
Min.: 1
Mult.: 1

Headers Breakaway 16 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 42375 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 2.54MM BREAKAWAY Vertical 28 CKT Gold
Datasheet
2,200In Stock
Min.: 1
Mult.: 1

Headers Breakaway 28 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 8.13 mm (0.32 in) 3.05 mm (0.12 in) 42375 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 6 POS RECEPT .156 TOP PCB TIN
Datasheet
1,768In Stock
Min.: 1
Mult.: 1

Headers Receptacle 6 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Socket (Female) Tin 41815 KK - 40 C + 105 C Tray
Molex Headers & Wire Housings KK Hdr Vrt 8 Ckt 2.54mm Pitch Sn
Datasheet
10,597In Stock
Min.: 1
Mult.: 1

Headers Locking 8 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 7.44 mm (0.293 in) 2.34 mm (0.092 in) 171856 KK Wire-to-Board - 40 C + 105 C Bulk
Molex Headers & Wire Housings 156 Bkwy 3 CKT
Datasheet
4,761In Stock
Min.: 1
Mult.: 1

Headers Breakaway 3 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 11.43 mm (0.45 in) 4.37 mm (0.172 in) 41661 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings KK 100 PCB Assy RtAn 05 Ckt Tin
Datasheet
3,304In Stock
Min.: 1
Mult.: 1

Headers Socket Assembly 5 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Right Angle Socket (Female) Tin 3.3 mm (0.13 in) 4455 KK Board-to-Board, Signal - 40 C + 105 C Tray
Molex Headers & Wire Housings KK 100 PCB Assy RtAn 12 Ckt Tin
Datasheet
1,444In Stock
Min.: 1
Mult.: 1

Headers Socket Assembly 12 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Right Angle Socket (Female) Tin 3.3 mm (0.13 in) 4455 KK Board-to-Board, Signal - 40 C + 105 C Tray
Molex Headers & Wire Housings KK 156 PCB Assy Top 10 Ckts Tin
Datasheet
1,842In Stock
Min.: 1
Mult.: 1

Headers Receptacle 10 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Socket (Female) Tin 41815 KK - 40 C + 80 C
Molex Headers & Wire Housings 10 POS RECEPT .156 TOP PCB GOLD
Datasheet
2,461In Stock
Min.: 1
Mult.: 1

Headers Socket Assembly 10 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Socket (Female) Gold 3.05 mm (0.12 in) 41815 KK Tray
Molex Headers & Wire Housings VERT B/A HDR 10P TIN FRICTION LOCK
Datasheet
1,020In Stock
Min.: 1
Mult.: 1

Headers Breakaway 10 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 41671 KK Board-to-Board, Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings 2.5 KK HSG FEMALE 2P
Datasheet
35,179In Stock
Min.: 1
Mult.: 1

Wire Housings Receptacle Housing 2 Position 2.5 mm (0.098 in) 1 Row Cable Mount / Free Hanging Crimp Socket (Female) 5051 KK Wire-to-Board, Signal - 40 C + 105 C Bulk
Molex Headers & Wire Housings 156 CRIMP 18-20
Datasheet
35,515In Stock
Min.: 1
Mult.: 1

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Tin 45570 KK Wire-to-Board, Power 20 AWG Bulk
Molex Headers & Wire Housings SOCKET 22-26AWG BULK
Datasheet
Product Comments
21,349In Stock
Min.: 1
Mult.: 1

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Gold 2578 KK 26 AWG to 22 AWG - 40 C + 85 C Bulk