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

This HW-5052 High Wattage 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 high wattage 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.

  • 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.

Cylindrical and Rectangular Magnets

Standard magnets-RRE Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading ->

Nov 18, 2020

Actuation 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 distances for the HW-5052-L Reed Switch in full length and Continue reading ->

Dec 3, 2020


Contact FormA
Contact Rating (max)W/VA120
Switching Current (max)A3.0
Carry Current (max)A5.0
DC Switching Voltage (max)VDC300
AC Switching Voltage (max)VAC240
Breakdown Voltage (min)VDC700
Contact Resistance (max)100
Insulation Resistance (min)Ω1010
Capacitance (typ)pF0.2


Operate Time (max)ms4.0
Bounce Time (max)ms1.0
Release Time (max)ms0.4
Resonance Frequency (typ)Hz>900
Operating Frequency (max)Hz185
Operating Temperature°C-40 to +200
Shock Resistance (½Sin wave for 11ms)G50
Vibration Resistance (10-2000Hz)G20
Test Coil Number717 102 001

Ordering Code

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

Contact Rating CodeLH
Corresponding Contact Rating (max)VA/W80120
Corresponding Switching Current (max)A2.03.0
Operate BandAT70-12070-120
Corresponding Release BandAT16-4020-55
Formation CodeLead Type
Full Length Leads

Examples: HW-5052-L-70-78 denotes 80W contact rating in 70-78 Operate Band (AT) band with Full Length leads. HW-5052-H-95-100-C denotes 120W Contact rating in 95-100 Operate Band (AT) with cropped leads.

Other Special Configurations: Lower Static Contact Resistance, Dynamic Contact Resistance Limit, Higher Insulation Resistance, Special Release Limits, Gold plated leads.

Usage Notes

Here are some of the recommended usage notes to ensure maximum durability of this high wattage Reed Switch. The complete usage notes are available here.

Ampere Turn Selection

Reed Sensor Manufacturer Cross Reference For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or Continue reading ->

Aug 27, 2020

Product Handling

Dropping Reed switch Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass Continue reading ->

Aug 31, 2020

Manual Soldering

Soldered Reed switch Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage Continue reading ->

Nov 10, 2020

Ferro-magnetic parts

Ferromagnetic parts Reed Switches use an alloy of Nickel and Iron with a few other elements that make the alloy Ferro-magnetic and having a low Remanence. Continue reading ->

Sep 4, 2019

Potting and Encapsulation

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

Sep 4, 2019

Reed Contact Protection Circuits

Inductive Load Protection Circuit It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive. Continue reading ->

Aug 31, 2020


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 High Wattage 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 switching as well as high current switching, in Continue reading ->

Nov 7, 2020

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 ratios to be selected that changes the Continue reading ->

Nov 7, 2020

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 door for docking. The bridge controller is Continue reading ->

Nov 7, 2020

Reed switches in Magnet Extensometers

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

Nov 7, 2020

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, mostly for loading and unloading in to container Continue reading ->

Nov 7, 2020

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 certain areas of the world. The electrical motors in Continue reading ->

Nov 7, 2020

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
4.7 based on 11 reviews