Headers & Wire Housings – Mouser United Kingdom

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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	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	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
Headers & Wire Housings KK 396 Wire-to-Board Header, Vert., Round Pin, w/ Polarizing Wall, 4 Pos., Tin (Sn) Pltg 26-19-2041 Molex 1: £0.601 3,707In Stock	Mfr. Part No. 26-19-2041 Mouser Part No 538-26-19-2041	Molex	Headers & Wire Housings KK 396 Wire-to-Board Header, Vert., Round Pin, w/ Polarizing Wall, 4 Pos., Tin (Sn) Pltg Learn More about Molex kk	Datasheet	3,707In Stock	£0.601 £0.509 £0.508 £0.432 View £0.368 £0.349 £0.332 £0.313 £0.304	Min.: 1 Mult.: 1	Headers	Shrouded	4 Position	3.96 mm (0.156 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin		4.45 mm (0.175 in)	3190	KK	Wire-to-Board, Power	- 40 C	+ 80 C	Bulk
Headers & Wire Housings KK 254 Crimp Housing, Friction Ramp, 3 Pos., Black 50-29-1558 Molex 1: £0.083 34,920In Stock	Mfr. Part No. 50-29-1558 Mouser Part No 538-50-29-1558	Molex	Headers & Wire Housings KK 254 Crimp Housing, Friction Ramp, 3 Pos., Black	Datasheet	34,920In Stock	£0.083 £0.074 £0.067 £0.064 View £0.059 £0.057 £0.054 £0.051 £0.049	Min.: 1 Mult.: 1	Headers		3 Position	2.54 mm (0.1 in)	1 Row				Socket (Female)				2695	KK	Wire-to-Board, Signal			Bulk
Headers & Wire Housings KK 396 Breakaway Header, Vert., 15 Pos., Matte Tin (Sn) Pltg 26-48-1151 Molex 1: £1.52 1,398In Stock	Mfr. Part No. 26-48-1151 Mouser Part No 538-26-48-1151	Molex	Headers & Wire Housings KK 396 Breakaway Header, Vert., 15 Pos., Matte Tin (Sn) Pltg Learn More about Molex kk	Datasheet	1,398In Stock	£1.52 £1.37 £0.871 £0.865	Min.: 1 Mult.: 1	Headers	Breakaway	15 Position	3.96 mm (0.156 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin			41661	KK				Bulk
Headers & Wire Housings KK 254 PC Board Conn., Bottom Entry, End-to-End Stackable, w/ Cat Ear Terminal, 2.54 m Tin (Sn) Pltg, 15 Pos. 38-00-1405 Molex 1: £3.30 1,066In Stock	Mfr. Part No. 38-00-1405 Mouser Part No 538-38-00-1405	Molex	Headers & Wire Housings KK 254 PC Board Conn., Bottom Entry, End-to-End Stackable, w/ Cat Ear Terminal, 2.54 m Tin (Sn) Pltg, 15 Pos. Learn More about Molex kk	Datasheet	1,066In Stock	£3.30 £3.26 £1.67 £1.66 £1.65	Min.: 1 Mult.: 1	Headers	Socket Assembly	15 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Bottom Entry	Socket (Female)	Tin		3.3 mm (0.13 in)	4455	KK	Board-to-Board, Signal	- 40 C	+ 105 C	Tray
Headers & Wire Housings KK 254 Breakaway Header, R/A w/ Friction Lock, 10 Pos., Tin (Sn) Pltg. w/ Kinked PC Tails 22-28-1103 Molex 1: £0.925 3,989In Stock	Mfr. Part No. 22-28-1103 Mouser Part No 538-22-28-1103	Molex	Headers & Wire Housings KK 254 Breakaway Header, R/A w/ Friction Lock, 10 Pos., Tin (Sn) Pltg. w/ Kinked PC Tails Learn More about Molex kk	Datasheet	3,989In Stock	£0.925 £0.917 £0.459	Min.: 1 Mult.: 1	Headers	Breakaway	10 Position	2.54 mm (0.1 in)	1 Row	Kinked Pin	Solder Pin	Right Angle	Pin (Male)	Tin	7.49 mm (0.295 in)	3.43 mm (0.135 in)	42228	KK				Bulk
Headers & Wire Housings KK 3.96mm Crimp Housing, Friction Ramp, 20 Pos., Natural 09-50-3201 Molex 1: £0.338 8,112In Stock	Mfr. Part No. 09-50-3201 Mouser Part No 538-09-50-3201	Molex	Headers & Wire Housings KK 3.96mm Crimp Housing, Friction Ramp, 20 Pos., Natural Learn More about Molex kk	Datasheet	8,112In Stock	£0.338 £0.331 £0.309	Min.: 1 Mult.: 1	Wire Housings	Receptacle Housing	20 Position	3.96 mm (0.156 in)	1 Row	Cable Mount / Free Hanging	Crimp		Socket (Female)				2139	KK				Bulk
Headers & Wire Housings 18P CRIMP RAMP HSNG 10-11-2183 Molex 1: £0.398 6,671In Stock	Mfr. Part No. 10-11-2183 Mouser Part No 538-10-11-2183	Molex	Headers & Wire Housings 18P CRIMP RAMP HSNG Learn More about Molex kk	Datasheet	6,671In Stock	£0.398 £0.352	Min.: 1 Mult.: 1	Wire Housings	Receptacle Housing	18 Position	2.54 mm (0.1 in)	1 Row	Cable Mount / Free Hanging	Crimp	Straight	Socket (Female)				7880	KK High Pressure				Bulk
Headers & Wire Housings KK 396 RPC Vert. Header, 3.96mm Pit., Friction Lock, Reflowed Matte Tin (Sn) Pltg, 17.02mm Mating Pin Lg., 2.37mm Tail Lg., Bag, 6 Pos. 171813-0006 Molex 1: £0.511 5,771In Stock	Mfr. Part No. 171813-0006 Mouser Part No 538-171813-0006	Molex	Headers & Wire Housings KK 396 RPC Vert. Header, 3.96mm Pit., Friction Lock, Reflowed Matte Tin (Sn) Pltg, 17.02mm Mating Pin Lg., 2.37mm Tail Lg., Bag, 6 Pos. Learn More about Molex kk 396 rpc headers	Datasheet	5,771In Stock	£0.511 £0.455 £0.448 £0.41 £0.369	Min.: 1 Mult.: 1	Headers	Locking	6 Position	3.96 mm (0.156 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	11.38 mm (0.448 in)	2.37 mm (0.093 in)	171813	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK 254 RPC Vert. Header, 2.54mm Pit., Friction Lock, Reflowed Matte Tin (Sn) Pltg, 7.44mm Mating Pin Lg., 2.34mm Tail Lg., Bag, 8 Pos. 171856-0008 Molex 1: £0.496 8,842In Stock	Mfr. Part No. 171856-0008 Mouser Part No 538-171856-0008	Molex	Headers & Wire Housings KK 254 RPC Vert. Header, 2.54mm Pit., Friction Lock, Reflowed Matte Tin (Sn) Pltg, 7.44mm Mating Pin Lg., 2.34mm Tail Lg., Bag, 8 Pos. Learn More about Molex kk 254 rpc headers	Datasheet	8,842In Stock	£0.496 £0.423 £0.336	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
Headers & Wire Housings KK 254 RPC Vert. Header, 2.54mm Pit., Friction Lock, 0.38 m Gold (Au) Pltg, 7.44mm Mating Pin Lg., 2.34mm Tail Lg., Bag, 5 Pos. 171856-1005 Molex 1: £0.882 2,502In Stock	Mfr. Part No. 171856-1005 Mouser Part No 538-171856-1005	Molex	Headers & Wire Housings KK 254 RPC Vert. Header, 2.54mm Pit., Friction Lock, 0.38 m Gold (Au) Pltg, 7.44mm Mating Pin Lg., 2.34mm Tail Lg., Bag, 5 Pos. Learn More about Molex kk 254 rpc headers	Datasheet	2,502In Stock	£0.882 £0.748 £0.747 £0.636 View £0.635 £0.567 £0.518 £0.49 £0.475	Min.: 1 Mult.: 1	Headers	Locking	5 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	Bulk
Headers & Wire Housings KK 254 RPC Vert. Header, 2.54mm Pit., Friction Lock, Reflowed Matte Tin (Sn) Pltg, 7.44mm Mating Pin Lg., 2.34mm Tail Lg., T/R, 4 Pos. 171856-3004 Molex 1: £1.03 4,565In Stock	Mfr. Part No. 171856-3004 Mouser Part No 538-171856-3004	Molex	Headers & Wire Housings KK 254 RPC Vert. Header, 2.54mm Pit., Friction Lock, Reflowed Matte Tin (Sn) Pltg, 7.44mm Mating Pin Lg., 2.34mm Tail Lg., T/R, 4 Pos. Learn More about Molex kk 254 rpc headers	Datasheet	4,565In Stock	Cut Tape £1.03 Reel £1.03 £1.01	Min.: 1 Mult.: 1 : 150	Headers	Locking	4 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	Reel, Cut Tape
Headers & Wire Housings KK 254 Crimp Housing, 8 Pos., Natural 22-01-2081 Molex 1: £0.196 26,262In Stock	Mfr. Part No. 22-01-2081 Mouser Part No 538-22-01-2081	Molex	Headers & Wire Housings KK 254 Crimp Housing, 8 Pos., Natural Learn More about Molex kk	Datasheet	26,262In Stock	£0.196 £0.18 £0.169 £0.165 View £0.159 £0.151 £0.148 £0.144	Min.: 1 Mult.: 1	Wire Housings	Receptacle Housing	8 Position	2.54 mm (0.1 in)	1 Row	Cable Mount / Free Hanging	Crimp		Socket (Female)				2695	KK	Wire-to-Board, Signal			Bulk
Headers & Wire Housings KK 254 Wire-to-Board Header, Single Row, Vert., 5 Pos., PA Polyamide Nylon, Gold (Au) Pltg 22-10-2051 Molex 1: £0.736 3,738In Stock	Mfr. Part No. 22-10-2051 Mouser Part No 538-22-10-2051	Molex	Headers & Wire Housings KK 254 Wire-to-Board Header, Single Row, Vert., 5 Pos., PA Polyamide Nylon, Gold (Au) Pltg Learn More about Molex kk	Datasheet	3,738In Stock	£0.736 £0.633 £0.629 £0.582 View £0.55 £0.536 £0.512	Min.: 1 Mult.: 1	Headers	Pin Strip	5 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Gold			4030	KK	Board-to-Board, Wire-to-Board, Signal	- 40 C	+ 80 C	Bulk
Headers & Wire Housings KK 254 PC Board Conn., Bottom Entry, End-to-End Stackable, 0.51 m Gold (Au) Pltg, 8 Pos. 22-17-2082 Molex 1: £3.51 1,136In Stock	Mfr. Part No. 22-17-2082 Mouser Part No 538-22-17-2082	Molex	Headers & Wire Housings KK 254 PC Board Conn., Bottom Entry, End-to-End Stackable, 0.51 m Gold (Au) Pltg, 8 Pos. Learn More about Molex kk	Datasheet	1,136In Stock	£3.51 £2.98 £2.54 £2.26 £1.96	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
Headers & Wire Housings KK 254 Breakaway Header, Vert., 12 Pos., 0.38 m Gold (Au) Pltg, Mating Pin Lg. 6.09mm, Bag 22-28-4123 Molex 1: £0.623 12,874In Stock	Mfr. Part No. 22-28-4123 Mouser Part No 538-22-28-4123	Molex	Headers & Wire Housings KK 254 Breakaway Header, Vert., 12 Pos., 0.38 m Gold (Au) Pltg, Mating Pin Lg. 6.09mm, Bag Learn More about Molex kk	Datasheet	12,874In Stock	£0.623 £0.545 £0.536 £0.497	Min.: 1 Mult.: 1	Headers	Breakaway	12 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Gold	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
Headers & Wire Housings KK 254 Breakaway Header, Vert., 20 Pos., Tin (Sn) Pltg, Mating Pin Lg. 6.09mm, Bag 22-28-4200 Molex 1: £0.863 8,977In Stock	Mfr. Part No. 22-28-4200 Mouser Part No 538-22-28-4200	Molex	Headers & Wire Housings KK 254 Breakaway Header, Vert., 20 Pos., Tin (Sn) Pltg, Mating Pin Lg. 6.09mm, Bag Learn More about Molex kk	Datasheet	8,977In Stock	£0.863 £0.733 £0.732 £0.623 View £0.622 £0.588 £0.555 £0.487	Min.: 1 Mult.: 1	Headers	Breakaway	20 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
Headers & Wire Housings KK 254 Breakaway Header, Vert., 22 Pos., Tin (Sn) Pltg, Mating Pin Lg. 6.09mm, Bag 22-28-4220 Molex 1: £0.89 2,436In Stock	Mfr. Part No. 22-28-4220 Mouser Part No 538-22-28-4220	Molex	Headers & Wire Housings KK 254 Breakaway Header, Vert., 22 Pos., Tin (Sn) Pltg, Mating Pin Lg. 6.09mm, Bag Learn More about Molex kk	Datasheet	2,436In Stock	£0.89 £0.882 £0.871 £0.811 View £0.732 £0.674 £0.604 £0.583	Min.: 1 Mult.: 1	Headers	Breakaway	22 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
Headers & Wire Housings KK 254 Breakaway Header, R/A, 6 Pos., Tin (Sn) Pltg, Mating Pin Lg. 10.29mm, w/ Kinked PC Tails, Bag 22-28-7061 Molex 1: £0.383 23,236In Stock	Mfr. Part No. 22-28-7061 Mouser Part No 538-22-28-7061	Molex	Headers & Wire Housings KK 254 Breakaway Header, R/A, 6 Pos., Tin (Sn) Pltg, Mating Pin Lg. 10.29mm, w/ Kinked PC Tails, Bag Learn More about Molex kk	Datasheet	23,236In Stock	£0.383 £0.327 £0.287 £0.254 £0.233	Min.: 1 Mult.: 1	Headers	Breakaway	6 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Tin	10.29 mm (0.405 in)	3.43 mm (0.135 in)	42376	KK	Board-to-Board, Wire-to-Board, Signal	- 40 C	+ 80 C	Bulk
Headers & Wire Housings KK 254 Breakaway Header, R/A SMT Compatible, 5 Pos., 0.38 m Gold (Au) Pltg, Mating Pin Lg. 8.23mm, Bag 22-28-8053 Molex 1: £0.511 15,105In Stock	Mfr. Part No. 22-28-8053 Mouser Part No 538-22-28-8053	Molex	Headers & Wire Housings KK 254 Breakaway Header, R/A SMT Compatible, 5 Pos., 0.38 m Gold (Au) Pltg, Mating Pin Lg. 8.23mm, Bag Learn More about Molex kk	Datasheet	15,105In Stock	£0.511 £0.443 £0.405 £0.366 View £0.333 £0.276 £0.258 £0.246 £0.236	Min.: 1 Mult.: 1	Headers	Breakaway	5 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	8.23 mm (0.324 in)	3.05 mm (0.12 in)	42377	KK	Board-to-Board, Wire-to-Board, Signal	- 40 C	+ 80 C	Bulk
Headers & Wire Housings KK 254 Breakaway Header, R/A SMT Compatible, 6 Pos., 0.38 m Gold (Au) Pltg, Mating Pin Lg. 6.2mm, Bag 22-28-8062 Molex 1: £0.676 29,519In Stock	Mfr. Part No. 22-28-8062 Mouser Part No 538-22-28-8062	Molex	Headers & Wire Housings KK 254 Breakaway Header, R/A SMT Compatible, 6 Pos., 0.38 m Gold (Au) Pltg, Mating Pin Lg. 6.2mm, Bag Learn More about Molex kk	Datasheet	29,519In Stock	£0.676 £0.571 £0.537 £0.485 View £0.432 £0.367 £0.342 £0.327 £0.292	Min.: 1 Mult.: 1	Headers	Breakaway	6 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold			42377	KK	Board-to-Board, Wire-to-Board, Signal	- 40 C	+ 80 C	Bulk
Headers & Wire Housings KK 396 Breakaway Header, Vert., 3 Pos., 0.50 m Gold (Au) Selective Pltg, Pin Lg. 19.05mm (.750") 26-48-2031 Molex 1: £0.818 4,739In Stock	Mfr. Part No. 26-48-2031 Mouser Part No 538-26-48-2031	Molex	Headers & Wire Housings KK 396 Breakaway Header, Vert., 3 Pos., 0.50 m Gold (Au) Selective Pltg, Pin Lg. 19.05mm (.750") Learn More about Molex kk	Datasheet	4,739In Stock	£0.818 £0.694 £0.665 £0.623 View £0.566 £0.51 £0.464 £0.436 £0.426	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
Headers & Wire Housings KK 396 Breakaway Header, R/A w/ Friction Lock, 3 Pos., Gold (Au) Pltg 26-48-2036 Molex 1: £1.12 2,694In Stock	Mfr. Part No. 26-48-2036 Mouser Part No 538-26-48-2036	Molex	Headers & Wire Housings KK 396 Breakaway Header, R/A w/ Friction Lock, 3 Pos., Gold (Au) Pltg Learn More about Molex kk	Datasheet	2,694In Stock	£1.12 £0.96 £0.89 £0.882 View £0.863 £0.849 £0.766 £0.755	Min.: 1 Mult.: 1	Headers	Breakaway	3 Position	3.96 mm (0.156 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	11.43 mm (0.45 in)	5.38 mm (0.212 in)	41672	KK	Wire-to-Board, Power	- 40 C	+ 80 C	Bulk
Headers & Wire Housings KK 254 PC Board Conn., R/A, End-to-End Stackable, w/ Cat Ear Terminal, 2.54 m Tin (Sn) Pltg, 4 Pos. 38-00-1334 Molex 1: £0.899 2,785In Stock	Mfr. Part No. 38-00-1334 Mouser Part No 538-38-00-1334	Molex	Headers & Wire Housings KK 254 PC Board Conn., R/A, End-to-End Stackable, w/ Cat Ear Terminal, 2.54 m Tin (Sn) Pltg, 4 Pos. Learn More about Molex kk	Datasheet	2,785In Stock	£0.899 £0.766 £0.54 £0.507 View £0.505 £0.475 £0.47 £0.468	Min.: 1 Mult.: 1	Headers	Socket Assembly	4 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Socket (Female)	Tin			4455	KK				Tray
Headers & Wire Housings KK 254 PC Board Conn., R/A, End-to-End Stackable, w/ Cat Ear Terminal, 2.54 m Tin (Sn) Pltg, 5 Pos. 38-00-1335 Molex 1: £0.899 3,284In Stock	Mfr. Part No. 38-00-1335 Mouser Part No 538-38-00-1335	Molex	Headers & Wire Housings KK 254 PC Board Conn., R/A, End-to-End Stackable, w/ Cat Ear Terminal, 2.54 m Tin (Sn) Pltg, 5 Pos. Learn More about Molex kk	Datasheet	3,284In Stock	£0.899 £0.773 £0.73 £0.593 View £0.549 £0.525 £0.481 £0.47 £0.457	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
Headers & Wire Housings KK 396 Breakaway Header, Vert., Square Pin, w/ Friction Lock, 2 Pos., 0.38 m Gold (Au) Pltg, 4.37mm Tail Lg., 11.43mm Mating Pin Lg. 41671-0001 Molex 1: £0.473 8,517In Stock	Mfr. Part No. 41671-0001 Mouser Part No 538-41671-0001	Molex	Headers & Wire Housings KK 396 Breakaway Header, Vert., Square Pin, w/ Friction Lock, 2 Pos., 0.38 m Gold (Au) Pltg, 4.37mm Tail Lg., 11.43mm Mating Pin Lg. Learn More about Molex kk	Datasheet	8,517In Stock	£0.473 £0.405 £0.398	Min.: 1 Mult.: 1	Headers	Breakaway	2 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)	41671	KK	Wire-to-Board, Power	- 40 C	+ 80 C	Bulk