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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: 3.10 CHF
372In Stock

Mfr. Part No.
59040-1-S-02-F

Mouser Part No
934-59040-1-S-02-F

Proximity Sensors NO 12-18AT Untinned Leads

Datasheet

372In Stock

3.10 CHF

2.60 CHF

2.41 CHF

2.08 CHF

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: 2.84 CHF
636In Stock
1 600Expected 01/10/2026

Mfr. Part No.
59040-1-S-02-A

Mouser Part No
934-59040-1-S-02-A

Proximity Sensors NO 12-18AT Tinned Leads

Datasheet

636In Stock

1 600Expected 01/10/2026

2.84 CHF

2.55 CHF

2.43 CHF

2.30 CHF

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: 3.10 CHF
25In Stock
500Expected 02/12/2026

Mfr. Part No.
59040-1-T-02-F

Mouser Part No
934-59040-1-T-02-F

Proximity Sensors NO 17-23AT Untinned Leads

Datasheet

25In Stock

500Expected 02/12/2026

3.10 CHF

2.58 CHF

2.39 CHF

2.29 CHF

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: 3.25 CHF
53In Stock
500Expected 30/11/2026

Mfr. Part No.
59040-1-U-02-A

Mouser Part No
934-59040-1-U-02-A

Proximity Sensors NO 22-28AT Tinned Leads

Datasheet

53In Stock

500Expected 30/11/2026

3.25 CHF

2.72 CHF

2.52 CHF

2.46 CHF

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: 5.93 CHF
96In Stock
500Expected 21/12/2026

Mfr. Part No.
59040-4-S-02-A

Mouser Part No
934-59040-4-S-02-A

Proximity Sensors NC 15-20AT Tinned Leads

Datasheet

96In Stock

500Expected 21/12/2026

5.93 CHF

5.04 CHF

4.51 CHF

4.32 CHF

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: 2.13 CHF
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
59040-1-S-02-E

Mouser Part No
934-59040-1-S-02-E

Proximity Sensors NO 12-18AT JST typeXHP 2.5pitch

Datasheet

Non-Stocked Lead-Time 16 Weeks

2.13 CHF

2.03 CHF

1.97 CHF

Min.: 500
Mult.: 100

Magnetic

25 mm

Wire

SPST-NO

Proximity Sensors NO 17-23AT Tinned Leads

59040-1-T-02-A
Littelfuse
1: 2.84 CHF
Lead-Time 16 Weeks

Mfr. Part No.
59040-1-T-02-A

Mouser Part No
934-59040-1-T-02-A

Proximity Sensors NO 17-23AT Tinned Leads

Datasheet

Lead-Time 16 Weeks

2.84 CHF

2.55 CHF

2.43 CHF

2.30 CHF

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: 5.90 CHF
Non-Stocked Lead-Time 27 Weeks

Mfr. Part No.
59040-3-S-02-A

Mouser Part No
934-59040-3-S-02-A

Proximity Sensors CO 15-20AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 27 Weeks

5.90 CHF

5.85 CHF

4.90 CHF

4.55 CHF

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: 3.53 CHF
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
59040-3-T-02-A

Mouser Part No
934-59040-3-T-02-A

Proximity Sensors CO 20-25AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

3.53 CHF

3.44 CHF

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: 3.53 CHF
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
59040-3-U-02-A

Mouser Part No
934-59040-3-U-02-A

Proximity Sensors CO 25-30AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

3.53 CHF

3.44 CHF

Min.: 500
Mult.: 100

Magnetic

17 mm

Wire

SPDT-CO

Proximity Sensors NC 20-25AT Tinned Leads

59040-4-T-02-A
Littelfuse
500: 3.30 CHF
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
59040-4-T-02-A

Mouser Part No
934-59040-4-T-02-A

Proximity Sensors NC 20-25AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

3.30 CHF

3.21 CHF

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: 3.30 CHF
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
59040-4-U-02-A

Mouser Part No
934-59040-4-U-02-A

Proximity Sensors NC 25-30AT Tinned Leads

Datasheet

Non-Stocked Lead-Time 16 Weeks

3.30 CHF

3.21 CHF

Min.: 500
Mult.: 100

Magnetic

17 mm

Wire

SPST-NC