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 (JPY) 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 RA PCB HDR 5P
Datasheet
4,500In 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) Gold 3.35 mm (0.132 in) 4455 KK Board-to-Board, Signal - 40 C + 80 C Tray
Molex Headers & Wire Housings VERT PCB HDR 3P TIN FRICTION LOCK
Datasheet
74,967In Stock
68,400Expected 9/11/2026
Min.: 1
Mult.: 1

Headers Locking 3 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 6373 KK Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings VERT PCB HDR 6P TIN FRICTION LOCK
Datasheet
32,852In Stock
Min.: 1
Mult.: 1

Headers Locking 6 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 6373 KK Bulk
Molex Headers & Wire Housings 16 POS STRAIT FRICT LOCK HEADER
Datasheet
1,586In Stock
Min.: 1
Mult.: 1

Headers Locking 16 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 6373 KK Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 3P VERT HEADER Sn
Datasheet
120,992In Stock
Min.: 1
Mult.: 1

Headers Breakaway 3 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 42375 KK Bulk
Molex Headers & Wire Housings 3CKT STRAIGHT HEADER
Datasheet
48,817In Stock
Min.: 1
Mult.: 1

Headers Breakaway 3 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 BREAKAWAY HDR VERT 6
Datasheet
50,025In 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 9P VERT HEADER Sn
Datasheet
14,161In Stock
Min.: 1
Mult.: 1

Headers Breakaway 9 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 6.09 mm (0.24 in) 3.18 mm (0.125 in) 42375 KK Board-to-Board, Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings 2.54MM BREAKAWAY Vertical 30 CKT Tin
Datasheet
4,982In Stock
Min.: 1
Mult.: 1

Headers Breakaway 30 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 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 36P 1 ROW VERT HDR
Datasheet
8,330In Stock
Min.: 1
Mult.: 1

Headers Breakaway 36 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 9PIN FR LOCK HEADER
Datasheet
1,732In Stock
Min.: 1
Mult.: 1

Headers Locking 9 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 7.5 mm (0.295 in) 3.56 mm (0.14 in) 6410 KK Wire-to-Board, Signal - 40 C + 80 C Bulk
Molex Headers & Wire Housings VERT B/A HDR 5P TIN FRICTION LOCK
Datasheet
5,827In Stock
Min.: 1
Mult.: 1

Headers Breakaway 5 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 41671 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings KK 156 Hdr Assy Flat Flat Bkwy 24 ckt Tin
Datasheet
1,173In Stock
Min.: 1
Mult.: 1

Headers Breakaway 24 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 14.99 mm (0.59 in) 4.37 mm (0.172 in) 41661 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings VERT PCB HDR 2P TIN FRICTION LOCK
Datasheet
31,432In Stock
32,400Expected 10/7/2026
Min.: 1
Mult.: 1

Headers Shrouded 2 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 41791 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings 15P FRIC LOCK HEADER
Datasheet
2,132In Stock
Min.: 1
Mult.: 1

Headers Shrouded 15 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 41791 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings KK 156 Hdr Assy FrLk FrLk Peg 05 Ckt Tin
Datasheet
2,468In Stock
Min.: 1
Mult.: 1

Headers Locking 5 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 11.43 mm (0.45 in) 3.56 mm (0.14 in) 42891 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings STRT SQ PIN HDR 5P CKT 2 and 4 VOIDED
Datasheet
7,127In Stock
Min.: 1
Mult.: 1

Headers Locking 5 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 11.43 mm (0.45 in) 3.56 mm (0.14 in) 41791 KK Wire-to-Board, Power - 40 C + 80 C
Molex Headers & Wire Housings HDR VERT W/PEGS 8P
Datasheet
8,572In Stock
Min.: 1
Mult.: 1

Headers Locking 8 Position 3.96 mm (0.156 in) 1 Row Press Fit Solder Pin Straight Pin (Male) Tin 42491 KK Bulk
Molex Headers & Wire Housings KK 100 PCB Assy RtAn 06 Ckt Tin
Datasheet
1,776In Stock
Min.: 1
Mult.: 1

Headers Socket Assembly 6 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 .156" KK HEADER
Datasheet
3,241In Stock
Min.: 1
Mult.: 1

Headers Locking 4 Position 3.96 mm (0.156 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Gold 11.43 mm (0.45 in) 3.56 mm (0.14 in) 41791 KK Wire-to-Board, Power - 40 C + 80 C Bulk
Molex Headers & Wire Housings 3.96 TERM 18-20AWG REEL OF 4000
Datasheet
Product Comments
48,000In Stock
Min.: 4,000
Mult.: 4,000
: 4,000

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Tin 45570 KK Wire-to-Board, Power 20 AWG Reel
Molex Headers & Wire Housings 2.54mm SRSW TH W/O C SRSW TH W/O Cap 3Ck
Datasheet
30,172In Stock
Min.: 1
Mult.: 1

Headers Breakaway 3 Position 2.54 mm (0.1 in) 1 Row Through Hole Solder Pin Straight Pin (Male) Tin 87891 KK Board-to-Board, Wire-to-Board, Signal - 55 C + 105 C Tray
Molex Headers & Wire Housings KK CE TRM 22-30G FEM Reel of 7000
Datasheet
Product Comments
63,000In Stock
280,000On Order
Min.: 7,000
Mult.: 7,000
: 7,000

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Tin 4809 KK 30 AWG to 22 AWG - 40 C + 80 C Reel

Molex Headers & Wire Housings KK TERM 18-24G Cut Strip of 100
Datasheet
Product Comments
28,200In Stock
Min.: 100
Mult.: 100

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Tin 2478 KK Wire-to-Board, Power 24 AWG to 18 AWG - 40 C + 80 C Cut Tape

Molex Headers & Wire Housings KK TERM 18-24G Reel of 1000
Datasheet
Product Comments
39,000In Stock
Min.: 1,000
Mult.: 1,000
: 1,000

Contacts Cable Mount / Free Hanging Crimp Socket (Female) Tin 2478 KK Wire-to-Board, Power 24 AWG to 18 AWG - 40 C + 80 C Reel