Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

HW-5052 Reed Switch for High Wattages

  • Drawing of HW-5052 Reed Switch
  • Drawing of HW-5052 Reed Switch for Soldering


Contact Rating Configurable. Ruthenium contact. 50.0 mm Glass length. Normally Open. Inert gas filled. Cropped Version available.


Omni-polar. Does not require power for operation. Sputtered Contact. RoHS Compliant. Not ESD Sensitive.


This reed switch is physically robust and can switch up to 120W. The two types of contact ratings available cover a wide range of high wattage applications. When supplied in a release AT group and used Normally Closed with a biased magnet, it is especially useful in elevator and hoist applications. Close differential characteristics can also be built into this reed switch. In addition to the standard Normally Open configuration, we can also supply this reed switch in a normally-closed or a latching form. This reed switch is completely Lead-free and conforms to the RoHS directive. The cropped version is suitable for smaller plastic housings and can be soldered to cables.

Standard Magnets

Standard magnets-RRE We offer a range of magnets for customers using our products, in different sizes...Continue reading ->

Activation Distances for HW-5052-L Reed Switch

HW-5052 reed switch actuation distances For easy selection of AT band and Magnet for an application, we offer Actuation...Continue reading ->


Contact Rating Code   L H
Operate Range AT 40 – 120 75 – 120
Release Range AT 15 – 40 22 – 55
Contact Rating (max) W/VA 80.0 120.0
Switching Current (max) A 2.0 3.0
Carry Current (max) A 3.0 5.0
DC Switching Voltage (max) VDC 300 300
AC Switching Voltage (max) VAC 240 240
Breakdown Voltage (min) VDC 500 800
Contact Resistance (max) 100 100
Insulation Resistance (min) Ω 1010 1010
Capacitance (min) pF 0.4 0.4


Operate Time (max) ms 4.0
Bounce Time (max) ms 1.0
Release Time (max) ms 0.4
Resonance Frequency Hz >900
Operating Frequency Hz 185
Operating Temperature °C -40 to +200
Shock Resistance (½Sin wave for 11ms) G 50
Vibration Resistance (10-2000Hz) G 20
Test Coil Code   717 102 001

Ordering Code

Contact Rating Code L H
  80W 120W
Formation Code C

HW-5052-(Contact Rating Code)-(Operate AT Band)-(Formation Code)

Ordering Code Examples

HW-5052-L-20-50 denotes 80W contact rating in 40-50 Operate AT band with unmodified leads
HW-5052-H-95-100-C denotes 120W contact rating in 95-100 Operate AT band with cropped leads

Product Handling

Dropping Reed switch Reed Switch Handling Reed Switches are sensitive devices that easily develop micro cracks in...Continue reading ->

Soldering Guide

Soldered Reed switch Soldering of Reed Switches and Reed Sensors requires some care to ensure that these...Continue reading ->

Ferro-magnetic parts

Ferromagnetic parts Reed Switches use an alloy of Nickel and Iron with a few other elements...Continue reading ->

Potting and Encapsulation

Dispensing unit Epoxy dispensing Nozzle When potting or encapsulating reed switch assemblies in custom housings, selection...Continue reading ->

Reed Contact Protection Circuits

Inductive Load Protection Circuit It is assumed that the ideal reed switch load is a Resistive Load, but...Continue reading ->

Magnet Information

Magnet Information In general, there are four families of magnets available commercially. Factors such as operating...Continue reading ->

Other Special Configurations Available

Lower Static Contact Resistance
Dynamic Contact Resistance Limit
Higher Insulation Resistance
Special Release Limits
Gold plated leads


Although we can never restrict the use of a reed switch to a particular field, the following is a list of some of the applications that the HW-5052 reed switch is known to perform well.

High Voltage Relays

High voltage relays Reed Relay The power industry uses many types of high voltage relays for signal...Continue reading ->

Reed switches in Transformer tap changers

Reed switches in transformer tap changer Transformer A transformer tap changer is an in-built mechanism which allows for variable turn...Continue reading ->

Magnet sensors for Bridge control in Airports

Reed switches in airport bridge control Airplane Bridge The bridge control operator needs to steer the bridge towards the airplane...Continue reading ->

Reed switches in Magnet Extensometers

Reed switches in magnet extensometer Extensometer Whenever there is a deep excavation that is done prior to construction, the...Continue reading ->

Magnet sensors in End position sensing in hoists and fork lifts

Reed switches in end position sensing in fork lifts Fork Lift Hoists and Fork Lifts are used to transport materials over short distances,...Continue reading ->

Reed switches in Floor detection in Elevators and Lifts

Reed switches in floor detection in lifts Elevator Most people are aware of Elevators, or lifts, as they are called in...Continue reading ->
HW-5052 120W Reed Switch for High Wattages
50.0mm x ø5.2mm, complete data sheet and technical specifications. This Reed Switch supersedes DRA 2021, DRA 2032, DRA 200, DRA 202 and DRA 282 and can be considered a direct equivalent. Customers can safely use HW-5052 in place of DRR 129, GC-1525, GC-1523, HSR190R, KAM-1 or MKA-50202.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: HW-5052
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