Circular Metric Connectors

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M12 B-Code Circular Metric Connectors

Amphenol LTW M12 B-Code Circular Metric Connectors offer 2 to 8 pins and feature a screw-thread mating style with complete 360° shielding. Compliant with IEC 61076-2-101, these connectors ensure industry-wide connector compatibility. Key features include a vibration-proof, corrosion-resistant design and a waterproof IP67/IP68/IP69K protection rating. Amphenol LTW M12 B-Code Circular Metric Connectors are suitable for wet and harsh environments, such as surveillance systems, mass rapid transit/railways, industrial automation, and broadband wireless access.

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Part #

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 03 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

M12B-03BFFA-SL8001
Amphenol LTW
1: $14.68
8In Stock

Mfr. Part #
M12B-03BFFA-SL8001

Mouser Part #
523-M12B03BFFASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 03 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

8In Stock

$14.68

$13.21

$12.45

$12.12

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

4 A

250 V

IP68

M12 B Code

Bulk

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 03 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

M12B-03BMMA-SL8001
Amphenol LTW
1: $13.89
4In Stock

Mfr. Part #
M12B-03BMMA-SL8001

Mouser Part #
523-M12B03BMMASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 03 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

4In Stock

$13.89

$12.49

$11.78

$11.47

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

4 A

250 V

IP68

M12 B Code

Bulk

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 04 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

M12B-04BMMA-SL8001
Amphenol LTW
1: $14.54
1In Stock

Mfr. Part #
M12B-04BMMA-SL8001

Mouser Part #
523-M12B04BMMASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 04 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

1In Stock

$14.54

$13.08

$12.32

$12.01

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

M12 B Code

Bulk

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

M12B-05BMMA-SL8001
Amphenol LTW
1: $14.82
10In Stock

Mfr. Part #
M12B-05BMMA-SL8001

Mouser Part #
523-M12B05BMMASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

10In Stock

$14.82

$13.35

$12.57

$12.25

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

M12 B Code

Bulk

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Straight, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

M12B-05BMMB-SL7001
Amphenol LTW
1: $16.29
9In Stock
20Expected 2026-04-16

Mfr. Part #
M12B-05BMMB-SL7001

Mouser Part #
523-M12B05BMMBSL7001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Straight, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

Learn More

Datasheet

9In Stock

20Expected 2026-04-16

$16.29

$14.66

$13.83

$13.47

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Hexagonal, PG9, Screw Thread, PCB 180 , Receptacle, Front Fastened, Panel Thickness 4.5, IP68 / IP69K

MSBS-05PFFP-SF8001
Amphenol LTW
1: $14.06
14In Stock

Mfr. Part #
MSBS-05PFFP-SF8001

Mouser Part #
523-MSBS05PFFPSF8001

Amphenol LTW

Learn More

Datasheet

14In Stock

$14.06

$12.66

$11.92

$11.63

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Hexagonal, M16*1.5, Screw Thread, PCB 180 , Receptacle, Front Fastened, IP68 / IP69K

MSBS-05PFFP-SF8002
Amphenol LTW
1: $14.28
9In Stock

Mfr. Part #
MSBS-05PFFP-SF8002

Mouser Part #
523-MSBS05PFFPSF8002

Amphenol LTW

Learn More

Datasheet

9In Stock

$14.28

$12.85

$12.11

$11.80

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Hexagonal, PG9, Screw Thread, PCB 180 , Receptacle, Front Fastened, Panel Thickness 4.5, IP68 / IP69K

MSBS-05PMMP-SF8001
Amphenol LTW
1: $12.57
1In Stock

Mfr. Part #
MSBS-05PMMP-SF8001

Mouser Part #
523-MSBS05PMMPSF8001

Amphenol LTW

Learn More

Datasheet

1In Stock

$12.57

$11.38

$10.74

$10.48

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Hexagonal, M16*1.5, Screw Thread, PCB 180 , Receptacle, Front Fastened, Panel Thickness 4.5, IP68 / IP69K

MSBS-05PMMP-SF8002
Amphenol LTW
1: $13.05
10In Stock

Mfr. Part #
MSBS-05PMMP-SF8002

Mouser Part #
523-MSBS05PMMPSF8002

Amphenol LTW

Learn More

Datasheet

10In Stock

$13.05

$11.81

$11.16

$10.88

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 04 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

M12B-04BFFA-SL8001
Amphenol LTW
1: $15.93
50Expected 2026-03-17

Mfr. Part #
M12B-04BFFA-SL8001

Mouser Part #
523-M12B04BFFASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 04 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

50Expected 2026-03-17

$15.93

$13.53

$13.18

$12.83

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

4 A

250 V

IP68

M12 B Code

Bulk

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Straight, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

M12B-05BFFB-SL7001
Amphenol LTW
1: $17.24
9Expected 2026-02-20

Mfr. Part #
M12B-05BFFB-SL7001

Mouser Part #
523-M12B05BFFBSL7001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Straight, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

Learn More

Datasheet

9Expected 2026-02-20

$17.24

$15.52

$14.62

$14.24

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Hexagonal, M12*1.0, Screw Thread, PCB 90 , Receptacle, Front Fastened, IP67 Mated

MSBS-05PMMR-SF7003
Amphenol LTW
1: $14.38
10Expected 2026-03-31

Mfr. Part #
MSBS-05PMMR-SF7003

Mouser Part #
523-MSBS05PMMRSF7003

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Hexagonal, M12*1.0, Screw Thread, PCB 90 , Receptacle, Front Fastened, IP67 Mated

Learn More

Datasheet

10Expected 2026-03-31

$14.38

$12.96

$12.20

$11.89

View

Min.: 1
Mult.: 1

Circular Metric Connectors

5 Contact

M12

Through Hole

B Coded

4 A

60 V

IP67

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Male Connector, Male Contact, SMT 180

MSBS-05PMMT-EE0001
Amphenol LTW
1: $9.98
10Expected 2026-03-31

Mfr. Part #
MSBS-05PMMT-EE0001

Mouser Part #
523-MSBS05PMMTEE8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Male Connector, Male Contact, SMT 180

Learn More

Datasheet

10Expected 2026-03-31

$9.98

$9.02

$8.53

$8.32

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

4 A

60 V

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

MSBP-05BFFA-SL8001
Amphenol LTW
1: $15.47
10Expected 2026-04-08

Mfr. Part #
MSBP-05BFFA-SL8001

Mouser Part #
523-SBP05BFFASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

10Expected 2026-04-08

$15.47

$13.92

$13.11

$12.79

View

Min.: 1
Mult.: 1

Circular Metric Connectors

5 Contact

M12

Solder

B Coded

4 A

60 V

IP68

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

M12B-05BFFA-SL8001
Amphenol LTW
1: $16.45
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
M12B-05BFFA-SL8001

Mouser Part #
523-M12B05BFFASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$16.45

$14.80

$13.93

$13.58

View

Min.: 1
Mult.: 1

Circular Metric Connectors

B Coded

4 A

60 V

IP68

M12 B Code

Bulk

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Right Angle, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP67 Mated

M12B-05BFFA-SR7001
Amphenol LTW
1: $15.72
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
M12B-05BFFA-SR7001

Mouser Part #
523-M12B05BFFASR7001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Right Angle, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP67 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$15.72

$14.15

$13.33

$12.99

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Female Connector, Female Contact, Right Angle, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

M12B-05BFFB-SR7001
Amphenol LTW
1: $17.41
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
M12B-05BFFB-SR7001

Mouser Part #
523-M12B05BFFBSR7001

Amphenol LTW

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$17.41

$15.67

$14.77

$14.38

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Right Angle, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP67 Mated

M12B-05BMMA-SR7001
Amphenol LTW
1: $14.93
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
M12B-05BMMA-SR7001

Mouser Part #
523-M12B05BMMASR7001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Right Angle, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP67 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$14.93

$13.44

$12.66

$12.34

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Right Angle, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

M12B-05BMMB-SR7001
Amphenol LTW
1: $16.51
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
M12B-05BMMB-SR7001

Mouser Part #
523-M12B05BMMBSR7001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Metal, 4A, 05 pins, Male Connector, Male Contact, Right Angle, Screw Thread, Screw-in, Field Installable, F4.0 - F8.0mm, IP67 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$16.51

$14.86

$14.00

$13.64

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 03 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

MSBP-03BFFA-SL8001
Amphenol LTW
1: $13.70
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
MSBP-03BFFA-SL8001

Mouser Part #
523-MSBP03BFFASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 03 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$13.70

$12.34

$11.63

$11.33

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 03 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

MSBP-03BMMA-SL8001
Amphenol LTW
1: $13.05
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
MSBP-03BMMA-SL8001

Mouser Part #
523-MSBP03BMMASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 03 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$13.05

$11.75

$11.07

$10.79

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 04 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

MSBP-04BFFA-SL8001
Amphenol LTW
1: $14.60
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
MSBP-04BFFA-SL8001

Mouser Part #
523-MSBP04BFFASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 04 pins, Female Connector, Female Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$14.60

$13.14

$12.38

$12.06

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 04 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

MSBP-04BMMA-SL8001
Amphenol LTW
1: $13.67
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
MSBP-04BMMA-SL8001

Mouser Part #
523-MSBP04BMMASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 04 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$13.67

$12.31

$11.59

$11.30

View

Min.: 1
Mult.: 1

Circular Metric Connectors

4 Contact

M12

Solder

B Coded

4 A

250 V

IP68

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Female Connector, Female Contact, Right Angle, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP67 Mated

MSBP-05BFFA-SR7001
Amphenol LTW
1: $13.27
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
MSBP-05BFFA-SR7001

Mouser Part #
523-MSBP05BFFASR7001

Amphenol LTW

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$13.27

$11.95

$11.25

$10.96

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

MSBP-05BMMA-SL8001
Amphenol LTW
1: $14.00
Non-Stocked Lead-Time 5 Weeks

Mfr. Part #
MSBP-05BMMA-SL8001

Mouser Part #
523-MSBP05BMMASL8001

Amphenol LTW

Circular Metric Connectors M12 Circular Metric Connector, B Code, Plastic, 4A, 05 pins, Male Connector, Male Contact, Straight, Screw Thread, Solder, Field Installable, F4.5 - F6.5mm, IP68 Mated

Learn More

Datasheet

Non-Stocked Lead-Time 5 Weeks

$14.00

$12.60

$11.87

$11.56

View

Min.: 1
Mult.: 1

Circular Metric Connectors

M12 B Code

M12 B-Code Circular Metric Connectors

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