Headers & Wire Housings

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KK 254 RPC Headers

Molex KK 254 Reflow Process Compatible (RPC) Connector System supports a lead-free solder process and delivers up to 5A and 250V per circuit in a 2.54mm pitch package. KK 254 headers are designed to support RoHS lead-free initiatives. Designed with a nylon housing, the wire-to-board system can withstand temperatures up to +260°C. Molex KK 254 series connectors are ideal for use in industries such as automotive, medical, and consumer.

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Part #

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert02 Ckt 15Au T&R

171856-4002
Molex
1: S/7.40
2,075In Stock

Mfr. Part #
171856-4002

Mouser Part #
538-171856-4002

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert02 Ckt 15Au T&R

Learn More

Datasheet

2,075In Stock

Cut Tape

S/7.40

S/6.46

S/6.19

S/5.76

Reel

S/4.09

View

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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK Hdr Vrt 8 Ckt 2.54mm Pitch Sn

171856-0008
Molex
1: S/2.57
9,445In Stock

Mfr. Part #
171856-0008

Mouser Part #
538-171856-0008

Molex

Headers & Wire Housings KK Hdr Vrt 8 Ckt 2.54mm Pitch Sn

Learn More

Datasheet

9,445In Stock

S/2.57

S/2.19

S/1.78

S/1.66

View

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

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 02 Ckt Tin

171856-0102
Molex
1: S/1.13
20,283In Stock

Mfr. Part #
171856-0102

Mouser Part #
538-171856-0102

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 02 Ckt Tin

Datasheet

20,283In Stock

S/1.13

S/0.942

S/0.802

S/0.716

View

Min.: 1
Mult.: 1

Headers

Locking

2 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Straight

Pin (Male)

Tin

7.49 mm (0.295 in)

3.56 mm (0.14 in)

171856

Wire-to-Board, Wire-to-Wire, Power, Signal

- 40 C

+ 105 C

Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 04 Ckt Tin T&R

171857-3004
Molex
1: S/2.41
11,552In Stock

Mfr. Part #
171857-3004

Mouser Part #
538-171857-3004

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 04 Ckt Tin T&R

Datasheet

11,552In Stock

Cut Tape

S/2.41

S/2.07

S/1.90

S/1.71

Reel

S/1.14

View

Min.: 1
Mult.: 1

: 3,300

Headers

Locking

4 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

6.73 mm (0.265 in)

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 02 Ckt Tin T&R

171857-3002
Molex
1: S/2.22
18,602In Stock

Mfr. Part #
171857-3002

Mouser Part #
538-171857-3002

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 02 Ckt Tin T&R

Learn More

Datasheet

18,602In Stock

Cut Tape

S/2.22

S/1.88

S/1.60

S/1.37

Reel

S/1.16

View

Min.: 1
Mult.: 1

: 3,300

Headers

Locking

2 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

6.73 mm (0.265 in)

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK Hdr Vrt 5 Ckt 2.54mm Pitch 15um Au

171856-1005
Molex
1: S/3.50
2,773In Stock

Mfr. Part #
171856-1005

Mouser Part #
538-171856-1005

Molex

Headers & Wire Housings KK Hdr Vrt 5 Ckt 2.54mm Pitch 15um Au

Learn More

Datasheet

2,773In Stock

S/3.50

S/3.12

S/2.82

S/2.64

View

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

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 04 Ckt Tin T&R

171856-3004
Molex
1: S/3.62
4,568In Stock

Mfr. Part #
171856-3004

Mouser Part #
538-171856-3004

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 04 Ckt Tin T&R

Learn More

Datasheet

4,568In Stock

Cut Tape

S/3.62

S/3.06

S/2.93

S/2.83

Reel

S/2.64

View

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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert03 Ckt 15Au T&R

171856-4003
Molex
1: S/4.44
2,270In Stock

Mfr. Part #
171856-4003

Mouser Part #
538-171856-4003

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert03 Ckt 15Au T&R

Learn More

Datasheet

2,270In Stock

Cut Tape

S/4.44

S/3.89

S/3.85

S/3.50

View

Reel

S/3.32

Min.: 1
Mult.: 1

: 1,050

Headers

Locking

3 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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK Hdr RA 3 Ckt 2.54mm Pitch Sn

171857-0003
Molex
1: S/1.36
76,613In Stock

Mfr. Part #
171857-0003

Mouser Part #
538-171857-0003

Molex

Headers & Wire Housings KK Hdr RA 3 Ckt 2.54mm Pitch Sn

Learn More

Datasheet

76,613In Stock

S/1.36

S/1.14

S/0.973

S/0.868

View

Min.: 1
Mult.: 1

Headers

Locking

3 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

6.73 mm (0.265 in)

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK Hdr RA 6 Ckt 2.54mm Pitch Sn

171857-0006
Molex
1: S/1.99
12,069In Stock

Mfr. Part #
171857-0006

Mouser Part #
538-171857-0006

Molex

Headers & Wire Housings KK Hdr RA 6 Ckt 2.54mm Pitch Sn

Learn More

Datasheet

12,069In Stock

S/1.99

S/1.69

S/1.44

S/1.28

View

Min.: 1
Mult.: 1

Headers

Locking

6 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

6.73 mm (0.265 in)

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK Hdr Vrt 8 Ckt 2.54mm Pitch 15um Au

171856-1008
Molex
1: S/6.85
1,919In Stock

Mfr. Part #
171856-1008

Mouser Part #
538-171856-1008

Molex

Headers & Wire Housings KK Hdr Vrt 8 Ckt 2.54mm Pitch 15um Au

Learn More

Datasheet

1,919In Stock

S/6.85

S/5.84

S/4.98

S/4.94

View

Min.: 1
Mult.: 1

Headers

Locking

8 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

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 06 Ckt 15Au T&R

171857-4006
Molex
1: S/5.06
1,840In Stock

Mfr. Part #
171857-4006

Mouser Part #
538-171857-4006

Molex

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 06 Ckt 15Au T&R

Learn More

Datasheet

1,840In Stock

Cut Tape

S/5.06

S/4.87

S/4.63

S/4.52

Reel

S/3.65

View

Min.: 1
Mult.: 1

: 2,700

Headers

Locking

6 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Gold

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert06 Ckt 15Au T&R

171856-4006
Molex
1: S/9.50
955In Stock

Mfr. Part #
171856-4006

Mouser Part #
538-171856-4006

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert06 Ckt 15Au T&R

Learn More

Datasheet

955In Stock

Cut Tape

S/9.50

S/8.29

S/7.94

S/7.43

Reel

S/5.41

View

Min.: 1
Mult.: 1

: 1,050

Headers

Locking

6 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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK Hdr RA 8 Ckt 2.54mm Pitch Sn

171857-0008
Molex
1: S/2.57
2,884In Stock

Mfr. Part #
171857-0008

Mouser Part #
538-171857-0008

Molex

Headers & Wire Housings KK Hdr RA 8 Ckt 2.54mm Pitch Sn

Learn More

Datasheet

2,884In Stock

S/2.57

S/2.35

S/2.34

S/2.18

View

Min.: 1
Mult.: 1

Headers

Locking

8 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

6.73 mm (0.265 in)

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 12 Ckt Tin T&R

171857-3012
Molex
1: S/5.45
4,200In Stock
4,200Expected 10/6/2026

Mfr. Part #
171857-3012

Mouser Part #
538-171857-3012

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 12 Ckt Tin T&R

Learn More

Datasheet

4,200In Stock

4,200Expected 10/6/2026

Cut Tape

S/5.45

S/4.63

S/4.44

S/4.16

Reel

S/2.85

View

Min.: 1
Mult.: 1

: 2,100

Headers

Locking

12 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 04 Ckt 15Au T&R

171857-4004
Molex
1: S/4.32
1,466In Stock

Mfr. Part #
171857-4004

Mouser Part #
538-171857-4004

Molex

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 04 Ckt 15Au T&R

Learn More

Datasheet

1,466In Stock

Cut Tape

S/4.32

S/4.24

S/4.20

S/4.01

View

Reel

S/2.54

Min.: 1
Mult.: 1

: 3,300

Headers

Locking

4 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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 07 Ckt 15Au T&R

171857-4007
Molex
1: S/9.30
1,843In Stock

Mfr. Part #
171857-4007

Mouser Part #
538-171857-4007

Molex

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 07 Ckt 15Au T&R

Learn More

Datasheet

1,843In Stock

Cut Tape

S/9.30

S/8.10

S/7.79

S/7.24

Reel

S/4.94

View

Min.: 1
Mult.: 1

: 2,700

Headers

Locking

7 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Gold

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK Hdr Vrt 9 Ckt 2.54mm Pitch 15um Au

171856-1009
Molex
1: S/7.32
8,460In Stock

Mfr. Part #
171856-1009

Mouser Part #
538-171856-1009

Molex

Headers & Wire Housings KK Hdr Vrt 9 Ckt 2.54mm Pitch 15um Au

Learn More

Datasheet

8,460In Stock

S/7.32

S/6.23

S/5.41

S/5.33

View

Min.: 1
Mult.: 1

Headers

Locking

9 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Straight

Pin (Male)

Gold

7.44 mm (0.293 in)

2.34 mm (0.092 in)

171856

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK Hdr Vrt 10 Ckt 2.54mm Pitch 15um Au

171856-1010
Molex
1: S/8.25
5,511In Stock

Mfr. Part #
171856-1010

Mouser Part #
538-171856-1010

Molex

Headers & Wire Housings KK Hdr Vrt 10 Ckt 2.54mm Pitch 15um Au

Learn More

Datasheet

5,511In Stock

Cut Tape

S/8.25

S/7.05

S/5.84

S/5.37

View

Reel

S/4.48

Min.: 1
Mult.: 1

: 2,850

Headers

Locking

10 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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 02 Ckt Tin T&R

171856-3002
Molex
1: S/3.50
2,437In Stock

Mfr. Part #
171856-3002

Mouser Part #
538-171856-3002

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 02 Ckt Tin T&R

Learn More

Datasheet

2,437In Stock

Cut Tape

S/3.50

S/2.97

S/2.45

S/2.27

Reel

S/2.08

View

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)

Tin

7.44 mm (0.293 in)

2.34 mm (0.092 in)

171856

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 5Ckt Tin

171856-0105
Molex
1: S/1.79
5,513In Stock

Mfr. Part #
171856-0105

Mouser Part #
538-171856-0105

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 5Ckt Tin

Datasheet

5,513In Stock

S/1.79

S/1.52

S/1.30

S/1.16

View

Min.: 1
Mult.: 1

Headers

Locking

5 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Straight

Pin (Male)

Tin

7.49 mm (0.295 in)

3.56 mm (0.14 in)

171856

Wire-to-Board, Wire-to-Wire, Power, Signal

- 40 C

+ 105 C

Headers & Wire Housings KK Hdr RA 12 Ckt 2.54mm Pitch Sn

171857-0012
Molex
1: S/3.78
1,887In Stock

Mfr. Part #
171857-0012

Mouser Part #
538-171857-0012

Molex

Headers & Wire Housings KK Hdr RA 12 Ckt 2.54mm Pitch Sn

Learn More

Datasheet

1,887In Stock

S/3.78

S/3.37

S/3.23

S/3.03

View

Min.: 1
Mult.: 1

Headers

Locking

12 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Tin

6.73 mm (0.265 in)

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Bulk

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 10 Ckt 15Au T&R

171857-4010
Molex
1: S/11.56
2,982In Stock

Mfr. Part #
171857-4010

Mouser Part #
538-171857-4010

Molex

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 10 Ckt 15Au T&R

Learn More

Datasheet

2,982In Stock

Cut Tape

S/11.56

S/10.51

S/9.96

S/9.26

Reel

S/6.46

View

Min.: 1
Mult.: 1

: 2,100

Headers

Locking

10 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Gold

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 12 Ckt 15Au T&R

171857-4012
Molex
1: S/10.55
2,019In Stock
Factory Special Order

Mfr. Part #
171857-4012

Mouser Part #
538-171857-4012

Factory Special Order

Molex

Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 12 Ckt 15Au T&R

Learn More

Datasheet

2,019In Stock

Cut Tape

S/10.55

S/9.58

S/9.07

S/8.45

Reel

View

Min.: 1
Mult.: 1

: 2,100

Headers

Locking

12 Position

2.54 mm (0.1 in)

1 Row

Through Hole

Solder Pin

Right Angle

Pin (Male)

Gold

2.54 mm (0.1 in)

171857

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 09 Ckt Tin T&R

171856-3009
Molex
1: S/5.45
1,459In Stock

Mfr. Part #
171856-3009

Mouser Part #
538-171856-3009

Molex

Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 09 Ckt Tin T&R

Learn More

Datasheet

1,459In Stock

Cut Tape

S/5.45

S/4.75

S/4.55

S/4.24

Reel

S/3.16

View

Min.: 1
Mult.: 1

: 1,050

Headers

Locking

9 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

Wire-to-Board

- 40 C

+ 105 C

Reel, Cut Tape

KK 254 RPC Headers

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