Reed Sensor Datasheet
59021
Aluminium Cylindrical Reed Sensor + 57020 Actuator
Description
The 59021 Reed Sensor is a miniature cylindrical reed sensor with a robust
aluminium body 15.24mm x 5.10mm (0.600” x 0.201”) with a normally open
contact. It is capable of switching up to 120 Vac/170 Vdc at 10 VA. The 59021
Reed Sensor is available with a range of sensitivity and cable length options. It
is well suited for use in a wide range of industrial, appliances, or IoT proximity
sensing applications. It functions best with the 57020-000 actuator.
Note: The 57020 Actuator is sold separately.
Features & Benefits
■ Non-contact switching
solution for wet &
■ Hermetically sealed, IP67
rated; REACH compliant
harsh environments
■ Can operate through
non-ferrous materials (for
example, wood, plastic,
or aluminum)
■ No leakage current in ‘open’
state−ideal for battery-
powered IoT applications
■ Helps implement efficient
proximity/access and energy
management systems
■ Available in select sensitivities
(operating distances)
Additional Information
■ Standard cable
■ Compact size and easy
installation and effective
concealment in
configurations; customization
options available
many applications
Resources
Accessories
Samples
Applications
■ Security and access control
■ Major appliances
■ Factory automation
■ Small appliances
■ Process equipment
■ Proximity and limit sensing
Dimensions
Dimensions in mm[in]
Package Dimensions
Dimensions in mm[in]
Product
A Nom. Mm[in]
B Nom. Mm[in]
5.10 +/- 0.25
15.24 +/- 0.25
57020 Actuator
59021 Sensor
[0.201 +/- 0.010]
[0.600 +/- 0.010]
5.10 +/- 0.25
[0.201 +/- 0.010]
15.24 +/- 0.25
[0.600 +/- 0.010]
Material Specifications
Housing
Color
Sealing
Component
Product
Material
57020 Actuator 15% GF PBT
59021 Sensor Aluminum
Black
Black
Epoxy
Epoxy
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 11/12/21
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