Reed switch

Reed switch
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Product Code : RS-4.0-28-S
Brand Name : ODM, OEM
Price And Quantity
  • Minimum Order Quantity
  • 1000 Piece
  • Price
  • 0.96 USD ($)/Piece
Product Specifications
  • Max. Current
  • 1A Ampere (amp)
  • Material
  • Ag
  • Insulation Resistance
  • 10ˆ9Ω
  • Contact Resistance
  • 100MΩ Milliohm (mΩ)
  • Max. Voltage
  • 100VDC Volt (V)
  • Operating Temperature
  • -10℃-+40℃ Celsius (oC)
  • Size
  • 4.0*28mm
  • Color
  • green glass, or white glass, and golden wire, or sliver wire
  • Weight
  • abt.2kg Kilograms (kg)
Product Description

28mm Silver Reed Switches are also known as glass tube switches that are greatly admired for having no wear & tear during their operation. These are generally used to control fluctuating current in the reed relays and various sensor based security devices & home appliances. They are controlled by invisible magnetic fields and are known to have longer operational life. 28mm Silver Reed Switches comprise two ferromagnetic contacts that have a gap between them when they are off.



  • No supply voltage required
  • Operated with help of non-magnetic material
  • Free from atmospheric damage



We, Hangzhou Red Fir is main supplier of Reed switches in China. 

We are developing, and manufacturing a wide range of high-quality, high-reliability reed switches for our customers. Current main market is india.

Main size:  


  • 2.0*10mm
  • 2.0*14mm
  • 3.0*20mm
  • 4.0*28mm
  • 5.0*50mm


1. Robust design

2. Low maintenance

3. Accurate dimensions

4. Easy to install nature

Reed Switch Features
Ability to switch up to 10,000 Volts
Ability to switch currents up to 5 Amps
Ability to switch or carry as low as 10 nanoVolts without signal  loss
Ability to switch or carry  as low as 1 femtoAmp without signal loss
Ability to switch or carry up to 7 GigaHz with minimal signal loss
Isolation across the contacts up to 1015 Î©
Contact resistance (on resistance) typical 50 milliOhms (mΩ).
In its off state it requires no power or circuitry
Ability to offer a latching feature
Operate time in the 100 µs to 300 µs range
 Ability to operate over extreme temperature ranges from -55 Â°C to 200 Â°C
Ability to operate in all types of environments including air, water, vacuum, oil, fuels, and dust laden atmospheres
 Ability to withstand shocks up to 200 Gs
Ability to withstand vibration environments of 50 Hz to 2000 Hz    at up to 30 Gs
Long life.  With no wearing parts, load switching under 5 Volts at 10 mA, will operate well into the billions of operation
Reed Switch Structure and Principle of Operation
TheoryCurrent Sensor
OutputDigital Sensor
Cintact Resistance35m Max
Dielectric Strength1500VAC,1minute

Trade Information
  • FOB Port
  • Shanghai
  • Payment Terms
  • Telegraphic Transfer (T/T), Cash in Advance (CID), Cash Advance (CA), Cash on Delivery (COD), Cash Against Delivery (CAD)
  • Supply Ability
  • 250000 Piece Per Day
  • Delivery Time
  • 10-15 Days
  • Sample Available
  • Yes
  • Sample Policy
  • Free samples are available
  • Packaging Details
  • Brown carton with bubble bag
  • Main Export Market(s)
  • Africa, Middle East, Western Europe, Eastern Europe, South America, North America, Central America, Australia, Asia
  • Main Domestic Market
  • All India


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