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Sensors Portfolio

Littelfuse is a global leader in magnetic sensing solutions with a portfolio covering reed switches, reed sensors, hall effect sensors, reed relays, and magnetic actuators. Littelfuse also offers a broad range of thermistors, resistance temperature detectors (RTDs), digital temperature indicators, and probes and assemblies for temperature sensing applications.

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Part #

Magnetic / Reed Switches MLRR-4 27-33

MLRR-4-27-33
Littelfuse
1: $2.15
701In Stock

Mfr. Part #
MLRR-4-27-33

Mouser Part #
934-MLRR-427-33

Littelfuse

Magnetic / Reed Switches MLRR-4 27-33

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Datasheet

701In Stock

$2.15

$1.83

$1.71

$1.51

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Min.: 1
Mult.: 1

Reed Relays HE3321A1200 REED RELAY

HE3321A1200
Littelfuse
1: $4.36
209In Stock
Factory Special Order

Mfr. Part #
HE3321A1200

Mouser Part #
934-HE3321A1200

Factory Special Order

Littelfuse

Reed Relays HE3321A1200 REED RELAY

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Datasheet

209In Stock

$4.36

$3.89

$3.70

$3.58

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Min.: 1
Mult.: 1

Reed Relays HE3321A2400 REED RELAY

HE3321A2400
Littelfuse
1: $3.91
551In Stock
Factory Special Order

Mfr. Part #
HE3321A2400

Mouser Part #
934-HE3321A2400

Factory Special Order

Littelfuse

Reed Relays HE3321A2400 REED RELAY

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Datasheet

551In Stock

$3.91

$3.49

$3.33

$3.07

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Min.: 1
Mult.: 1

Reed Relays HE3351A2400

HE3351A2400
Littelfuse
1: $5.63
549In Stock
Factory Special Order

Mfr. Part #
HE3351A2400

Mouser Part #
934-HE3351A2400

Factory Special Order

Littelfuse

Reed Relays HE3351A2400

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Datasheet

549In Stock

$5.63

$5.02

$4.79

$4.62

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Min.: 1
Mult.: 1

Reed Relays HE3621A0540

HE3621A0540
Littelfuse
1: $4.14
20In Stock
Factory Special Order

Mfr. Part #
HE3621A0540

Mouser Part #
934-HE3621A0540

Factory Special Order

Littelfuse

Reed Relays HE3621A0540

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Datasheet

20In Stock

$4.14

$3.69

$3.52

$3.41

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Min.: 1
Mult.: 1

Reed Relays REED RELAY

HE3621A1250
Littelfuse
1: $4.90
132In Stock
Factory Special Order

Mfr. Part #
HE3621A1250

Mouser Part #
934-HE3621A1250

Factory Special Order

Littelfuse

Reed Relays REED RELAY

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Datasheet

132In Stock

$4.90

$4.34

$4.19

$4.11

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Min.: 1
Mult.: 1

Reed Relays REED RELAY

HE721A1210
Littelfuse
1: $3.84
1,047In Stock
Factory Special Order

Mfr. Part #
HE721A1210

Mouser Part #
934-HE721A1210

Factory Special Order

Littelfuse

Reed Relays REED RELAY

Datasheet

1,047In Stock

$3.84

$3.43

$3.27

$3.16

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Min.: 1
Mult.: 1

Reed Relays HE721C0530 REED RELAY

HE721C0530
Littelfuse
1: $11.84
12In Stock
Factory Special Order

Mfr. Part #
HE721C0530

Mouser Part #
934-HE721C0530

Factory Special Order

Littelfuse

Reed Relays HE721C0530 REED RELAY

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Datasheet

12In Stock

$11.84

$10.56

$10.08

$9.73

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Min.: 1
Mult.: 1

Reed Relays HE722A2400 REED RELAY

HE722A2400
Littelfuse
1: $5.61
307In Stock
Factory Special Order

Mfr. Part #
HE722A2400

Mouser Part #
934-HE722A2400

Factory Special Order

Littelfuse

Reed Relays HE722A2400 REED RELAY

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Datasheet

307In Stock

$5.61

$5.01

$4.79

$4.63

View

Min.: 1
Mult.: 1

Hall Effect / Magnetic Sensors - Industrial 55140 AP02A HALL SENSOR

55140-AP-02-A
Littelfuse
1: $15.62
16In Stock

Mfr. Part #
55140-AP-02-A

Mouser Part #
934-55140AP02A

Littelfuse

Hall Effect / Magnetic Sensors - Industrial 55140 AP02A HALL SENSOR

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Datasheet

16In Stock

$15.62

$14.32

$13.84

$13.38

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Min.: 1
Mult.: 1

Proximity Sensors NO 17-23AT 300mm TIN

59022-1-T-02-A
Littelfuse
1: $5.86
39In Stock

Mfr. Part #
59022-1-T-02-A

Mouser Part #
934-59022-1-T-02-A

Littelfuse

Proximity Sensors NO 17-23AT 300mm TIN

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Datasheet

39In Stock

$5.86

$5.13

$4.45

$3.95

View

Min.: 1
Mult.: 1

Proximity Sensors CO 20-25AT 300mm TIN

59022-3-T-02-A
Littelfuse
1: $8.49
152In Stock

Mfr. Part #
59022-3-T-02-A

Mouser Part #
934-59022-3-T-02-A

Littelfuse

Proximity Sensors CO 20-25AT 300mm TIN

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Datasheet

152In Stock

$8.49

$7.08

$6.90

$6.28

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Min.: 1
Mult.: 1

Proximity Sensors 59150 020 PROX SENSOR

59150-020
Littelfuse
1: $6.05
14In Stock

Mfr. Part #
59150-020

Mouser Part #
934-59150-020

Littelfuse

Proximity Sensors 59150 020 PROX SENSOR

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Datasheet

14In Stock

$6.05

$4.70

$4.17

$3.83

View

Min.: 1
Mult.: 1

Magnetic / Reed Switches MDSM-4B 5276 12-18

MDSM-4B-12-18
Littelfuse
1: $2.29
25In Stock

Mfr. Part #
MDSM-4B-12-18

Mouser Part #
934-MDSM-4B12-18

Littelfuse

Magnetic / Reed Switches MDSM-4B 5276 12-18

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Datasheet

25In Stock

$2.29

$1.92

$1.84

$1.66

View

Min.: 1
Mult.: 1

Magnetic / Reed Switches NO 25-30AT

MDSR-10-25-30
Littelfuse
1: $2.02
985In Stock

Mfr. Part #
MDSR-10-25-30

Mouser Part #
934-MDSR-10-25-30

Littelfuse

Magnetic / Reed Switches NO 25-30AT

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Datasheet

985In Stock

$2.02

$1.72

$1.60

$1.41

View

Min.: 1
Mult.: 1

Hall Effect / Magnetic Sensors - Industrial 3 Wire SW 500mm TIN

55100-3H-04-A
Littelfuse
1: $10.49
5,492On Order

Mfr. Part #
55100-3H-04-A

Mouser Part #
934-55100-3H-04-A

Littelfuse

Hall Effect / Magnetic Sensors - Industrial 3 Wire SW 500mm TIN

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Datasheet

5,492On Order

$10.49

$10.08

$9.24

$8.93

View

Min.: 1
Mult.: 1

Hall Effect / Magnetic Sensors - Industrial MINI FLANGE MT PROX SEN ANALOG

55100-AP-02-A
Littelfuse
1: $25.65
300Expected 2026-02-25

Mfr. Part #
55100-AP-02-A

Mouser Part #
934-55100AP02A

Littelfuse

Hall Effect / Magnetic Sensors - Industrial MINI FLANGE MT PROX SEN ANALOG

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Datasheet

300Expected 2026-02-25

$25.65

$22.32

$21.10

$19.34

Min.: 1
Mult.: 1

Proximity Sensors PROX SENS CHANGE OVER UNTINNED

59025-3-T-02-F
Littelfuse
1: $9.10
500Expected 2026-04-13

Mfr. Part #
59025-3-T-02-F

Mouser Part #
934-59025-3-T-02-F

Littelfuse

Proximity Sensors PROX SENS CHANGE OVER UNTINNED

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Datasheet

500Expected 2026-04-13

$9.10

$7.02

$6.25

$5.75

Min.: 1
Mult.: 1

Proximity Sensors NC 15-20AT 1m TIN 59025 Firecracker

59025-4-S-05-A
Littelfuse
1: $12.20
307Expected 2026-05-28

Mfr. Part #
59025-4-S-05-A

Mouser Part #
934-59025-4-S-05-A

Littelfuse

Proximity Sensors NC 15-20AT 1m TIN 59025 Firecracker

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Datasheet

307Expected 2026-05-28

$12.20

$9.39

$8.37

$7.87

Min.: 1
Mult.: 1

Proximity Sensors NO 12-18AT Tinned Leads

59040-1-S-02-A
Littelfuse
1: $5.74
1,272On Order

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

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

Littelfuse

Proximity Sensors NO 12-18AT Tinned Leads

Learn More

Datasheet

1,272On Order

$5.74

$4.45

$3.95

$3.63

View

Min.: 1
Mult.: 1

Proximity Sensors CO 15-20AT Tinned Leads

59040-3-S-02-A
Littelfuse
1: $10.40
395Expected 2026-03-10

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

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

Littelfuse

Proximity Sensors CO 15-20AT Tinned Leads

Learn More

Datasheet

395Expected 2026-03-10

$10.40

$8.01

$7.15

$6.56

View

Min.: 1
Mult.: 1

Magnetic / Reed Switches 59050 020 SENSOR

59050-020
Littelfuse
1: $5.56
998Expected 2026-06-04

Mfr. Part #
59050-020

Mouser Part #
934-59050-020

Littelfuse

Magnetic / Reed Switches 59050 020 SENSOR

Learn More

Datasheet

998Expected 2026-06-04

$5.56

$4.85

$4.59

$4.20

View

Min.: 1
Mult.: 1

Proximity Sensors 59060-3-S-05-A SENS

59060-3-S-05-A
Littelfuse
1: $24.06
600Expected 2026-07-10

Mfr. Part #
59060-3-S-05-A

Mouser Part #
934-59060-3-S-05-A

Littelfuse

Proximity Sensors 59060-3-S-05-A SENS

Learn More

Datasheet

600Expected 2026-07-10

$24.06

$18.45

$16.52

$15.28

View

Min.: 1
Mult.: 1

Proximity Sensors 59070-1-T-02-A SENS

59070-1-T-02-A
Littelfuse
1: $7.08
591Expected 2026-05-19

Mfr. Part #
59070-1-T-02-A

Mouser Part #
934-59070-1-T-02-A

Littelfuse

Proximity Sensors 59070-1-T-02-A SENS

Learn More

Datasheet

591Expected 2026-05-19

$7.08

$5.47

$4.87

$4.45

View

Min.: 1
Mult.: 1

Proximity Sensors PROX SENSOR MINI FLANGE MOUNT

59140-020
Littelfuse
1: $6.14
1,000On Order

Mfr. Part #
59140-020

Mouser Part #
934-59140-020

Littelfuse

Proximity Sensors PROX SENSOR MINI FLANGE MOUNT

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Datasheet

1,000On Order

$6.14

$4.76

$4.23

$3.88

View

Min.: 1
Mult.: 1

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