Reed Relays

Reed relays are electromechanical devices designed to switch a low-level control signal in response to an electrical current or magnetic field. The relay consists of a coil windings and a magnetically actuated reed switch that is closed when the coil is energized. Reed relays are typically used in telephone switching systems, security systems, electronic test equipment, and automotive applications.

The DAR71210U is a low-power reed relay designed for applications requiring high switching performance. It has a low operating power (10 mW) and low on-state resistance (50 mΩ maximum). The relay is housed in a hermetically sealed glass package and it has multiple contact configurations and a wide range of operating temperatures.

DAR71210U Application Field and Working Principle

The DAR71210U reed relay is suitable for a wide range of applications, from automotive and industrial systems to home and office automation. The relay can be used for controlling external circuits or for connecting two or more circuits. It is ideal for applications where power consumption must be kept to a minimum, such as battery-operated devices.

The relay is composed of a coil and a two-pivot reed switch. When the coil is energized, the current creates a magnetic field that acts on the reed switch, closing it, and allowing current to flow through the contacts. When the coil is de-energized, the switch opens, cutting off the current.

The DAR71210U relay is designed to meet high-level switching performance requirements. It features low-power operation, low on-state resistance, high-speed switching operation, reverse voltage protection and surge immunity. The contacts of the relay are also highly durable, with an operating life of over 100,000 cycles.

The DAR71210U has a wide range of operating temperatures, from -40 to 150°C (-40 to 302°F). This makes it suitable for use in demanding applications and environments.

Overall, the DAR71210U reed relay is an ideal solution for low-power applications that require high-speed switching performance and reliability. Its low power consumption and wide range of operating temperatures make it suitable for a range of applications.