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

SM-1322 Sub Miniature Reed Switch

This Form A type SM-1322 Sub Miniature Reed Switch is built with a 2.25 mm diameter glass with a higher wall thickness for better glass to metal seals, and is a good solution for general purpose, high volume applications with a little shock and vibration, such as toys. The center contact also makes it suitable for coil applications. The three Release AT ranges available cover a wide range of Release AT specific applications. A specially Sputtered contact for 230 VAC line voltage switching is also available. The cropped version of the SM-1322 Sub Miniature Reed Switch is suitable for smaller plastic housings and can be soldered to cables, the SMD version is suitable for re-flow on PCB, and the vertical and horizontal mount versions are suitable for mounting on through hole PCB.

  • Drawing of SM-1322 Sub Miniature Reed Switch
  • Drawing of SM-1322 Reed Switch for Soldering
  • Drawing of SM-1322 with SMD Formed Leads
  • Drawing of SM-1322 with Leads Formed for Horizontal mounting
  • Drawing of SM-1322 Reed Switch for Vertical mounting


Release AT Configurable. Ruthenium contact. 14.0 mm Glass length. Normally Open. Inert gas filled. 4 types of Lead Formations.



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 SM-1322 Reed Switches

SM-1322 reed switch actuation distances For easy selection of AT band and Magnet for an application, we offer Actuation distances for the SM-1322 Sub Miniature Reed Switch in Continue reading ->

Nov 25, 2020


Contact FormA
Contact Rating (max)W/VA10.0
Switching Current (max)A0.5
Carry Current (max)A1.50
DC Switching Voltage (max)VDC180
AC Switching Voltage (max)VAC130
Breakdown Voltage (min)VDC200
Contact Resistance (max)150
Insulation Resistance (min)Ω1011
Capacitance (typ)pF0.2


Operate Time (max)ms0.50
Bounce Time (max)ms0.15
Release Time (max)ms0.15
Resonance Frequency (typ)Hz>2000
Operating Frequency (max)Hz500
Operating Temperature°C-40 to +200
Shock Resistance (½Sin wave for 11ms)G50
Vibration Resistance (10-2000Hz)G20
Test Coil Number717 102 002

Ordering Code

SM-1322-(Release AT Code)-(Operate Band)-(Formation Code)

Release AT CodeLMH
Operate BandAT10-4010-4010-40
Corresponding Release BandAT4-206-257.5-30
Formation CodeLead Type
Full Length Leads
HHorizontal Mount
VVertical Mount

Examples: SM-1322-L-15-19 denotes Low Release in 15-19 Operate Band (AT) with Full Length leads. SM-1322-H-10-15-S denotes High Release AT in 10-15 Operate band (AT) with SMD Formed 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 Sub Miniature 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

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Aug 31, 2020

Manual Soldering

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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

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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 SM-1322 Sub Miniature Reed Switch is known to perform well.

Magnet Sensors for Two Wheeler and E-Bike Side Stand Sensing

Motorcycle Sidestand Side stand Motorcycles, Scooters and other motorized E-bikes have a side stand and a main stand under the chassis. A quick and easy Continue reading ->

Feb 17, 2022

Reed switches and Reed Sensors in Barcode Scanners

Barcode Scanner Barcode scanners in supermarkets can be clicked on to a docking system that is integrated with the check-out conveyor belt. This helps Continue reading ->

Nov 6, 2020

Reed Sensors for Early Brake Sensing

Brake pedal Automobile Brake Pedal The Brake pedal of an automobile is a very important aspect of the vehicle which is used to give an indication Continue reading ->

Nov 7, 2020

Reed Sensors in Automobile Power windows

Car power window Automobile Power Window These days, most automobile windows can be raised or lowered using buttons near the seats or on the inside of Continue reading ->

Nov 7, 2020

Reed switches in Petrol and Diesel Pumps

Reed switches in petrol and disel pumps Fuel Nozzle Petrol and diesel pumping stations are explosive environments where a minor mistake could cause a great big fire. Reed Continue reading ->

Nov 7, 2020

Reed switches in Gear speed and direction sensing

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Nov 7, 2020

Reed switches in Ferrous part detection

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Nov 7, 2020

Reed switches in Electronics and Science Kits

Reed switches in science kits Science Kit Reed Switches are used in many electronics and science kits for experimenting on various circuits and scientific phenomena. Continue reading ->

Nov 7, 2020

Reed switches and Float switches in Water tank control

Reed switches in water tank control Water tank control Water is a scarcity in most of the major cities of the world, and in residences and apartments where an overhead Continue reading ->

Nov 6, 2020

Reed switches in Blowers

Reed switches in blowers Blower Blowers or centrifugal fans are used in various fields to move air or other gases from one area to another, either to vacuum or Continue reading ->

Nov 7, 2020

Reed sensors in Power switches for explosive areas

Reed switches in explosive area Explosive Areas Explosion proof enclosures come in different grades and house components like switches, plug, controls, knobs, and Continue reading ->

Nov 7, 2020

Magnet Sensors for Door and window Security

Reed switches in window security Door/Window Security Home and Workspace security is paramount and most newly constructed spaces integrate security products during Continue reading ->

Nov 6, 2020

Reed sensors in Wind Vanes

Reed switches in wind vanes Wind Vane A weather vane is an instrument used to show the direction of the wind. A regular weather vane usually consists of a pointer Continue reading ->

Nov 7, 2020

Reed switches and Reed sensors in Pressure Gauges

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Nov 7, 2020

Magnet Sensors in Anemometers

Reed switches in anemometer Anemometer An Anemometer is an instrument used to measure wind speed. Spinning cup anemometers are measure wind speeds and are part of Continue reading ->

Nov 6, 2020

Flow Meters for checking Lake currents

Reed switches in flow_meter Lake Current Meter Underwater currents in lakes and other water bodies are caused by various factors such as pressure gradients due to Continue reading ->

Nov 7, 2020

Magnet sensors in Anti-lock braking system (ABS)

Reed switches in ABS control system Anti-lock Braking Anti-lock braking system or ABS for short, is a safety system used on aircraft and on vehicles, such as cars, Continue reading ->

Nov 7, 2020

Reed switches in Coolant flow sensing

Reed switches in coolant flow sensing Radiator Coolant A coolant is a fluid, that is used to reduce or regulate the temperature of a system, like an engine through a Continue reading ->

Nov 7, 2020

Magnet sensors in Low fluid level monitoring

Reed switches in low fluid level monitoring Fluid Low Level Automobiles these days need to provide a wide range of information on the various liquid levels ranging from wind Continue reading ->

Nov 7, 2020

Magnet sensors for Dish Washer spray arm jam detection

Reed switches in dish washer spray arm jam detection Dishwasher Dish Washers are appliances used to automatically wash dishes and cutlery, by spraying high pressure hot water and Continue reading ->

Nov 6, 2020

Level Sensing in Washing Machines and Dish Washers

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Nov 6, 2020

Reed sensors in Telephone Handsets

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Nov 20, 2020

Magnet sensors for Tension Monitoring in Coil Winders

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Nov 6, 2020

Reed switches in Reed Relays for Fax Machines

Fax machine Fax Machine A Facsimile Machine or Fax Machine enables the transmission of documents over telephone lines. Although these machines Continue reading ->

Nov 6, 2020

Magnet Sensors in Fluid Metering

Water meter Fluid Meter In most large cities, utility companies or closed communities run piped Water and Liquefied Petroleum Gas, LPG, to all Continue reading ->

Nov 7, 2020

SM-1322 10W Sub Miniature Reed Switches
13.0 mm x ø2.25 mm, Flattened leads, complete data sheet and technical specifications. This Reed Switch supersedes TRA 2028 and THA 2028 and can be considered a direct equivalent. Customers can safely use SM-1322 in place of MDCG 4, ORD 228 VL, KSK-1A66, RI 23, RD-7B orMKA-14103.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: SM-1322
3.8 based on 6 reviews