Reed relays for durable and reliable switching

From micro-signals (nV) to high voltages (kV)

Reed Relais Steinecker

High voltage

Switching voltage up to 10 kV


Highly insulated

Insulation resistance up to 10 TOhm

Reed-Relais 201


10 million switchings

Up to 100 million switchings

A Reed relay is a special relay type which are used in devices for switching operations. This relay uses one or more reed switches (reed contact) as switching elements.
Reed switch
These reed switches are placed in a coil and are safely shed together in a housing. This protects you and is easy to handle. Reliability and a long service life (up to 100 million switching cycles) characterize this relay type. The low contact transition resistance is also crucial for many applications. This ensures lossless switching of micro-signals (nanovolt) and micro-currents (femtoampere).

Reedrelais have the following special characteristics:

  • Long service life (up to 10 million switchings)

  • High insulation resistance (up to 1014 Ohm)

  • Switching of micro-currents (femto ampere)

  • Switching voltage up to 10 kV

  • Switching time approx. 1 ms

Our reed relays operate according to the simple and long-lasting principle of reed technology. In a reed switch, 2 ferromagnetic switches are hermetically enclosed in a glass body. They are therefore protected from pollution and other environmental influences. This ensures a constant low contact transition resistance with high reliability and long service life. If a current flows through the coil, a magnetic field is generated. This affects the 2 ferromagnetic switches so that they attract each other and thus close the contact.

The reed relay consists of the following components:

Reed Relay Construction

  • 1 or more reed switch, inside the coil
  • Coil for generating the magnetic field
  • Optional diode to suppress voltage spikes of coil
  • Optional Magnetic screen
  • Housing
  • Connection Pins

Reedrelais are available in various designs as closers, openers or changers. They are often used in electronic circuits.

Comparison: Semiconductor Relay | Reed relay

Reed Relay
Semiconductor relays use the switching behavior of specially controlled transistors, mostly based on FET switches.
The insulation resistance of Reed relays is much higher than for the semiconductor types, as they have a certain leak current due to the design. The capacity of a semiconductor relay is much bigger. Reed relays generally have a potential separation from the signal path, which is not the case with the semiconductor types.

Comparison: Mechanical Relay | Reed Relay

ReedRelay Mechanical-Reedrelays have a mechanical life (for small loads) that is 10 to 100 times longer than mechanical relays because they have less moving
parts. They switch by a factor of 10 faster, due to the easier and easier setup of the switching points. The isolation values with open contact are significantly higher, up to 10^14 ohm. Similarly, you need less power to switch contacts than for mechanical types. In addition, reedrelais can be switched at a high switching frequency of several hundred Hertz. The average downtime rate (MTBF) is also well over 100,000 hours.

In order to respond to your specific requirements in the best possible way, the Reedrelais are available in various versions . You get these with different pinnings for PCB assembly. We also provide you with axial relaytypes. As an option, you can order these with diode, magnetic or electrostatic screen , or as a highly insulated version for special requirements.


Highly insulated

High-insulated reedrelais are used for applications in measurement technology with high demands for interference signal suppression. This design offers insulation resistance of up to 10 TOhm, with a low leak current, a constant transition resistance, an electrostatic and magnetic screen and all in a high-primal design.

Magnetic Shield

A shielding hood made of ferromagnetic material prevents the influence of external magnetic fields on the relay. This is also used when the relays are placed close to each other on a board. This prevents mutual influence.

Static Shield.

An optimal shielding of the contacts between each other and the coil is achieved by CU-tubes around the reed contact. They also reduce the pruning of the contacts and thus the interference voltage by magnetic resistance. This reduces the tightening and waste delay of the eddy currents caused by this construction.

Reed relays can be found in various basic variants:

  • Standard
  • DIL version
  • Highly insulated
  • High voltage.

You can choose between normally open, normally closed and change over contacts .
There are single-pole and multi-pole relays, i.e. one or more switching contacts.
You can get the relays with our standard pinning, but also define your individual connection pinning.
Optionally, a diode can be integrated into the relay to suppress voltage spikes. An optional magnetic shield allows the shielding of external magnetic fields, which can otherwise cause the relay to malfunction.

Selectable Product Parameters:

  • Coil voltage DC: 5V, 6V, 9V, 12V, 18V, 24V, 36V or 48 volts
  • Mounting: printed circuit board, surface mount
  • Switching contact: close (form A), opener (form B), changer (form C, SPDT)
  • One or multipole
  • Diode
  • Magnetic Shield

Product examples

Here you can see an exemplary selection of reed relays. In addition, we also offer other product variants. Ask us now

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