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 We offer a range of magnets in different sizes and shapes, specially selected to...Continue reading ->

Actuation Distances for SM-1322 Reed Switches

SM-1322 reed switch actuation distances On/Off distances for the 13.0 mm SM-1322 reed switch having cropped, SMD, Horizontal Mount...Continue reading ->


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...Continue reading ->

Product Handling

Dropping Reed switch Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro...Continue reading ->

Manual Soldering

Soldered Reed switch Manual Soldering of reed switch leads may be required when using custom plastic housing...Continue reading ->

Ferro-magnetic parts

Ferromagnetic parts Using Ferro-magnetic mounting parts or screws within a 100 mm vicinity of a reed switch will...Continue reading ->

Potting and Encapsulation

Dispensing unit As some potting compounds cure over 24 hours, the glass seals should be protected....Continue reading ->

Reed Contact Protection Circuits

Inductive Load Protection Circuit When a reed switch is to be connected to an inductive load or a...Continue reading ->


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 Side Stand Sensing

Motorcycle Sidestand Magnet Sensors are used in two wheelers to sense whether the side stand has...Continue reading ->

Reed switches and Reed Sensors in Barcode Scanners

Barcode Scanner A reed switch and magnet combination is used in the docks and barcode scanners...Continue reading ->

Reed Sensors for Early Brake Sensing

Brake pedal When the brake pedal is pressed, the magnet is the first to move away...Continue reading ->

Reed Sensors in Automobile Power windows

Car power window The motor which drives the glass up or down has a multi-pole ring magnet...Continue reading ->

Reed switches in Petrol and Diesel Pumps

Reed switches in petrol and disel pumps Petrol and diesel pumps use reed switches to sense if the nozzle has been...Continue reading ->

Reed switches in Gear speed and direction sensing

Reed switches in gear speed and direction sensing Miniature ferrous part detection sensors can be positioned near gears to sense the speed...Continue reading ->

Reed switches in Ferrous part detection

Reed switches in pick and place unit Ferrous part detection sensors are built by positioning two weak magnets near the seals...Continue reading ->

Reed switches in Electronics and Science Kits

Reed switches in science kits Reed Switches are used in many science and electronic kits for experimenting on various...Continue reading ->

Reed switches and Float switches in Water tank control

Reed switches in water tank control Reed Switch based float switches are used to control the pump, which fills an...Continue reading ->

Reed switches in Blowers

Reed switches in blowers In blowers and vacuum ducts, a vane with a tiny light magnet is fitted...Continue reading ->

Reed sensors in Power switches for explosive areas

Reed switches in explosive area Reed Switches, being hermetically sealed and unaffected by the atmosphere and surroundings, can be...Continue reading ->

Magnet Sensors for Door and window Security

Reed switches in window security Magnets can be mounted on doors and windows, and reed sensors, on the fixed...Continue reading ->

Reed sensors in Wind Vanes

Reed switches in wind vanes Eight reed switches are mounted radially at 22.5 degree angles making compass points on...Continue reading ->

Reed switches and Reed sensors in Pressure Gauges

Reed switches in bourdon tube pressure gauge Bourdon tube pressure gauges are fitted with a magnet on the Bourdon tube itself...Continue reading ->

Magnet Sensors in Anemometers

Reed switches in anemometer Spinning cup anemometers are fitted with magnets and as the wind blows, a reed...Continue reading ->

Flow Meters for checking Lake currents

Reed switches in flow_meter Reed Switches are used in flow meters to calculate volume of liquid. Flow meters...Continue reading ->

Magnet sensors in Anti-lock braking system (ABS)

Reed switches in ABS control system In ABS control, the onboard electronics needs to apply differential hydraulic pressure to each...Continue reading ->

Magnet sensors in Low fluid level monitoring

Reed switches in low fluid level monitoring Wind screen viper fluid, brake oil, power steering oil, and radiator coolant tanks can...Continue reading ->

Reed switches in Coolant flow sensing

Reed switches in coolant flow sensing A simple, cost effective reed switch based flow sensor can be connected in the...Continue reading ->

Magnet sensors for Dish Washer spray arm jam detection

Reed switches in dish washer spray arm jam detection Reed Sensors are used in dish washers for spray arm jam detection and door...Continue reading ->

Level Sensing in Washing Machines and Dish Washers

Washing Machines Washing machines and dish washers have reservoirs to hold detergent, and fabric or water...Continue reading ->

Reed sensors in Telephone Handsets

Reed switches in telephone hook switches Conventional hook switches which are used in telephone handsets undergo millions of operations and...Continue reading ->

Magnet sensors for Tension Monitoring in Coil Winders

Magnet sensors in Winding count and tension sensing and in Coil Winders Reed Sensors find an important role in closed loop tension control and coil winding...Continue reading ->

Reed switches in Reed Relays for Fax Machines

Fax machine Reed Switch based Reed Relays continue to be used in Fax Machines for switching...Continue reading ->

Magnet Sensors in Fluid Metering

Water meter To make an existing analog fluid meter generate digital output readings that can be...Continue reading ->
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