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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: S/14.99
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

S/14.99

S/12.57

S/11.64

S/10.67

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: S/15.73
886In 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

886In Stock

1,600Expected 10/1/2026

S/15.73

S/13.16

S/12.18

S/9.93

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: S/19.31
500In Stock

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

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

Proximity Sensors NO 17-23AT Untinned Leads

Datasheet

500In Stock

S/19.31

S/16.27

S/15.10

S/13.70

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: S/15.73
120In Stock

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

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

Proximity Sensors NO 22-28AT Tinned Leads

Datasheet

120In Stock

S/15.73

S/13.16

S/12.18

S/11.91

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: S/33.01
146In Stock
500Expected 12/21/2026

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

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

Proximity Sensors NC 15-20AT Tinned Leads

Datasheet

146In Stock

500Expected 12/21/2026

S/33.01

S/27.83

S/25.89

S/23.47

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: S/10.32
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

S/10.32

S/9.81

S/9.26

Min.: 500
Mult.: 100

Magnetic

25 mm

Wire

SPST-NO

Proximity Sensors NO 17-23AT Tinned Leads

59040-1-T-02-A
Littelfuse
1: S/15.73
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

Lead-Time 16 Weeks

S/15.73

S/15.57

S/13.16

S/12.18

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: S/28.53
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

S/28.53

S/28.30

S/23.71

S/21.99

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: S/17.36
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

S/17.36

S/16.58

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: S/17.36
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

S/17.36

S/16.58

Min.: 500
Mult.: 100

Magnetic

17 mm

Wire

SPDT-CO

Proximity Sensors NC 20-25AT Tinned Leads

59040-4-T-02-A
Littelfuse
500: S/16.27
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

S/16.27

S/15.53

S/14.95

Min.: 500
Mult.: 100

Magnetic

18.4 mm

Wire

SPST-NC

Proximity Sensors NC 25-30AT Tinned Leads

59040-4-U-02-A
Littelfuse
500: S/16.27
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

S/16.27

S/15.53

S/14.95

Min.: 500
Mult.: 100

Magnetic

17 mm

Wire

SPST-NC