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59040 Reed Sensors

Littelfuse 59040 Reed Sensors are small, cylindrical reed sensors 31.0mm (1.22") long that press into a 9.5mm (.375") diameter hole with a choice of normally open, normally closed, or change-over contacts. Littelfuse 59040 is capable of switching up to 200V_DC at 10W contact rating. An extensive range of sensitivity with a specified cable length is available. The housing color is white. It has three crush ribs along the length of the capsule that allow a firm and fixed press-fit. 59040 is well-suited for use in a wide range of industrial, appliances, or IoT proximity sensing applications. It functions best with a 57040 actuator.

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Part #

Proximity Sensors NO 12-18AT Untinned Leads

59040-1-S-02-F
Littelfuse
1: $3.37
372In Stock

Mfr. Part #
59040-1-S-02-F

Mouser Part #
934-59040-1-S-02-F

Proximity Sensors NO 12-18AT Untinned Leads

Datasheet

372In Stock

$3.37

$3.01

$2.88

$2.73

View

Min.: 1
Mult.: 1

Magnetic

25 mm

Wire

SPST-NO

Proximity Sensors NO 12-18AT Tinned Leads

59040-1-S-02-A
Littelfuse
1: $3.52
536In Stock
1,600Expected 10/1/2026

Mfr. Part #
59040-1-S-02-A

Mouser Part #
934-59040-1-S-02-A

Proximity Sensors NO 12-18AT Tinned Leads

Datasheet

536In Stock

1,600Expected 10/1/2026

$3.52

$3.16

$3.02

$2.86

View

Min.: 1
Mult.: 1

Magnetic

25 mm

Wire

SPST-NO

Proximity Sensors NO 17-23AT Untinned Leads

59040-1-T-02-F
Littelfuse
1: $3.33
15In Stock
500Expected 10/12/2026

Mfr. Part #
59040-1-T-02-F

Mouser Part #
934-59040-1-T-02-F

Proximity Sensors NO 17-23AT Untinned Leads

Datasheet

15In Stock

500Expected 10/12/2026

$3.33

$3.01

$2.86

$2.68

View

Min.: 1
Mult.: 1

Magnetic

21.2 mm

Wire

SPST-NO

Proximity Sensors NO 22-28AT Tinned Leads

59040-1-U-02-A
Littelfuse
1: $4.23
33In Stock
500Expected 10/14/2026

Mfr. Part #
59040-1-U-02-A

Mouser Part #
934-59040-1-U-02-A

Proximity Sensors NO 22-28AT Tinned Leads

Datasheet

33In Stock

500Expected 10/14/2026

$4.23

$3.79

$3.62

$3.43

View

Min.: 1
Mult.: 1

Magnetic

17.9 mm

Wire

SPST-NO

Proximity Sensors NC 15-20AT Tinned Leads

59040-4-S-02-A
Littelfuse
1: $7.37
134In Stock
1,000On Order

Mfr. Part #
59040-4-S-02-A

Mouser Part #
934-59040-4-S-02-A

Proximity Sensors NC 15-20AT Tinned Leads

Datasheet

134In Stock

1,000On Order

$7.37

$6.25

$5.60

$5.37

View

Min.: 1
Mult.: 1

Magnetic

21 mm

Wire

SPST-NC

Proximity Sensors NO 12-18AT JST typeXHP 2.5pitch

59040-1-S-02-E
Littelfuse
500: $2.70
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
59040-1-S-02-E

Mouser Part #
934-59040-1-S-02-E

Proximity Sensors NO 12-18AT JST typeXHP 2.5pitch

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.70

Min.: 500
Mult.: 100

Magnetic

25 mm

Wire

SPST-NO

Proximity Sensors NO 17-23AT Tinned Leads

59040-1-T-02-A
Littelfuse
1: $3.52
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
59040-1-T-02-A

Mouser Part #
934-59040-1-T-02-A

Proximity Sensors NO 17-23AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

$3.52

$3.16

$3.02

$2.86

View

Min.: 1
Mult.: 1

Magnetic

21.2 mm

Wire

SPST-NO

Proximity Sensors CO 15-20AT Tinned Leads

59040-3-S-02-A
Littelfuse
1: $7.11
Non-Stocked Lead-Time 27 Weeks

Mfr. Part #
59040-3-S-02-A

Mouser Part #
934-59040-3-S-02-A

Proximity Sensors CO 15-20AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 27 Weeks

$7.11

$7.08

$5.89

$5.51

View

Min.: 1
Mult.: 1

Magnetic

21 mm

Wire

SPDT-CO

Proximity Sensors CO 20-25AT Tinned Leads

59040-3-T-02-A
Littelfuse
500: $4.38
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
59040-3-T-02-A

Mouser Part #
934-59040-3-T-02-A

Proximity Sensors CO 20-25AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

$4.38

$4.25

Min.: 500
Mult.: 100

Magnetic

18.4 mm

Wire

SPDT-CO

Proximity Sensors CO 25-30AT Tinned Leads

59040-3-U-02-A
Littelfuse
500: $4.71
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
59040-3-U-02-A

Mouser Part #
934-59040-3-U-02-A

Proximity Sensors CO 25-30AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

$4.71

Min.: 500
Mult.: 100

Magnetic

17 mm

Wire

SPDT-CO

Proximity Sensors NC 20-25AT Tinned Leads

59040-4-T-02-A
Littelfuse
500: $4.40
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
59040-4-T-02-A

Mouser Part #
934-59040-4-T-02-A

Proximity Sensors NC 20-25AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

$4.40

Min.: 500
Mult.: 100

Magnetic

18.4 mm

Wire

SPST-NC

Proximity Sensors NC 25-30AT Tinned Leads

59040-4-U-02-A
Littelfuse
1: $5.82
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
59040-4-U-02-A

Mouser Part #
934-59040-4-U-02-A

Proximity Sensors NC 25-30AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

$5.82

$5.25

$5.03

$4.78

View

Min.: 1
Mult.: 1

Magnetic

17 mm

Wire

SPST-NC