There are several types of miniature relay
available in the market. Reed relay, Mercury-wetted relay, relays with evacuated glass housing, and Latching relay are some of them. Depending on your requirements, you can choose the one that suits your needs best. For example, a relay for use in air conditioning can be a good option if your cooling system requires a constant level of electricity.Reed relays are miniature electrical switches with a small footprint. They can operate at nominal coil voltages of 5Vdc to 24Vdc and are available with various contact switching actions. They can be either latching or bi-stable. They are typically used in low-voltage applications. Some are even available with a dual contact switching action, making them a flexible and efficient option.GRT508FA CQC Certification Single Phase 80A Latching Relays
-80A contact switching capability.
-Only impulse excitation needed, both for single and double coil.
-Low power consumption, small in size.
-Custom assemblies available with flexible wire and/or copper straps, and/or with integrated shunt.
-4KV dielectric strength between coil and contacts
-Outline dimensions: (39.1 x 30.9 x 17)mm
-CQC Certificate No.: 9001036713
The Littelfuse line of miniature reed relays includes models with single-in-line and dual-in-line (DIP) packages. These miniature relays feature hermetically-sealed constructions, as well as multiple contact configurations. These miniature relays are designed for applications involving security, process control, and automated test equipment.Reed relays are also available in a variety of packages, each designed for a particular application. They can be surface-mounted on PCBs or in panel packages. Some models feature leadless designs that eliminate lead skewing during surface mounting. The CRR series surface-mount reed relays are also encased in a ceramic thermoset moulded package for added protection and reliability.
A Mercury-wetted miniature relay provides a variety of benefits, including improved operating sensitivity, increased load switching capability, and low dielectric loss. The unique construction also minimizes the magnetic flux return path reluctance. Designed for miniature applications, these relays are compatible with existing solid state devices.Mercury relays are manufactured in two basic configurations: latching and impulse. Each type consists of a horizontal glass tube with two axially isolated pools of mercury. A conductive stirrup bridges the two pools of mercury. The stirrup is rotated within the pool along the horizontal axis of the tube, and a weight is placed on the stirrup's armature. The stirrup also has a magnetic slug to facilitate rotation by an external electromagnet.Mercury-wetted miniature relays use a thin layer of liquid mercury to make and break circuits. Their main disadvantage is that they must be mounted at an angle of less than 30 degrees vertically.
They are not suitable for all applications.Reed relays have an evacuated glass housing, which prevents dust and debris from entering the internal parts. Because the contacts of these relays are sealed in a hermetic glass envelope, the thermal energy that the contacts generate during closed and open conditions is minimal. However, the contacts can be subjected to high levels of current when the device is closed on a low-level signal. This can lead to increased resistance or even an open circuit.Reed relays come in different types. Some are designed to switch a large current. Others are designed to provide higher speed switching. In a high-speed application, the Reed relay may have transistors or thyristors. These devices may also contain molybdenum or tungsten to enhance the speed of switching.Reed relays are available in small packages. They have a high current capability and a high-voltage capability. They are also small and can be closely stacked. They are easy to operate and come in many shapes and sizes.