JWD-171-27

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Reed Relays

Reed relays, which are powered by an electromagnetic coil, use an electromagnet to open and close electrical contacts. Reed relays are widely used for switching currents up to 2A and for switching voltages up to 230VAC or 175VDC at frequencies of 1 MHz or lower. These applications span a wide range of industries, from home automation, communications, medical, automotive, and industrial manufacturing to name a few.

JWD-171-27 Application Field and Working Principle

The JWD-171-27 relay is an electromagnetic reed relay mounted in a 10-pin DIP package. It features high reliability and low current consumption and is suitable for applications that require mechanical isolation between input and output circuits. The operating temperature of the JWD-171-27 is -40°C to +85°C. The contact ratings are 1A at 28VAC or 28VDC (resistive load).

The working principle of the JWD-171-27 reed relay is straightforward. When an electrical signal is applied to the coil, a magnetic field is created, which interacts with the movable armature within the relay. This causes the armature to move, thus closing the contacts and allowing the current to travel from one circuit to another. When the coil is de-energized, the armature returns to its original position, thus opening the contacts and interrupting the current flow.

This type of relay also includes a passive shorting feature, which shunts the contacts at the start and end of the switching cycle in order to protect it from spikes or surges of current. This allows the relay to handle short duration overloads, while preventing the contacts from becoming welded shut.

The JWD-171-27 is mainly used in telecommunications, broadcast, industrial, medical diagnostic and other equipment requiring convenience, low cost, and high reliability. It is ideal for activating control circuits, alarms, buzzers and relays, as well as for indicator and pulse applications. The JWD-171-27 is also suitable for burst-mode operation and can be used to switch inductive and capacitive loads with proper design of the external circuitry.

Conclusion

Reed relays are widely used in a variety of applications, such as home automation, communications, medical, automotive and industrial manufacturing. The JWD-171-27 relay is an electromagnetic reed relay that is suitable for switching currents up to 1A and voltages up to 28VAC or 28VDC. It has a passive shorting feature, allowing it to handle short duration overloads while preventing the contacts from becoming welded shut. It is mainly used in telecommunications, broadcast, industrial, medical diagnostic and other equipment requiring convenience, low cost, and high reliability.

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