Good product, good way

High frequency relay

High-frequency relays are used to switch high-frequency circuits. High-frequency signal relays with a switching frequency of less than 100MHz are called high-frequency relays. The low-profile component composed of ceramic as the base completely matches the thermal expansion coefficient between the reed switch and the pin, and can reduce and reduce any thermal stress generated inside the package.

Description

Theory:POWER RELAY
Usage:PCB
Size:Miniature
Protect Feature:Sealed
Contact Load:High Power
Color:black
Contact material:AgCdO

Definition

High-frequency relays are used to switch high-frequency circuits. High-frequency signal relays with a switching frequency of less than 100MHz are called high-frequency relays. The low-profile component composed of ceramic as the base completely matches the thermal expansion coefficient between the reed switch and the pin, and can reduce and reduce any thermal stress generated inside the package.

Features

1) Miniature, high power, Coil low power consumption
2) Used for automotive system
3) Environmental friendly product (RoHS compliant)

Function and role

1. The circuit insulation resistance is high and the dielectric loss is small, the contact system is fixed on a high-frequency ceramic, high-frequency plastic or glass base;

2. The distributed capacitance between the contacts is small, the size of the contact reeds is small and they are placed alternately at 45 °, 90 ° and 180 °;

3. The distance between the contact and other conductive parts or grounding parts is large, or the contact circuit is shielded. When high-speed switching of high-frequency circuits or switching of high-voltage high-frequency circuits is required, the contacts are sealed in a high vacuum or inflated chamber.

Note

The contact system has a special structure, and the distributed capacitance between the disconnecting contact and the contact to the housing is small. The insulating material in the contact system must also be a high-frequency material with a small dielectric loss, such as ceramic material or glass material. The contacts of this type of relay contact system are placed at an angle of about 45 °, 90 ° or 180 ° between the reeds, and the parts of the contact system are small in size. The contact system uses beryllium bronze and silver alloy with better conductivity , Gold alloy, palladium alloy, platinum alloy and other materials, the surface of the parts should be plated with gold, rhodium and other materials.

In addition to the small distributed capacitance of the contact system, the structure of the high-frequency relay must also consider the matching of the characteristic impedance. The structure size should avoid or be far less than 1/4 wavelength of the operating frequency to reduce signal reflection. The structure size here refers to the size of the parts with distributed capacitance between the contact reeds and the parts and assembly sizes connected to them. Because the structure and shape of these parts are generally more complicated, it is possible that a part of them can be folded into a 1/4 working wavelength length short-circuited coaxial cable and become a metal insulator. The metal insulator is short-circuited to the DC signal, but it is insulated at a certain frequency, which greatly reduces the isolation. In addition, 1/4 wavelength resonant cavity can also be formed, which greatly reduces the high-frequency performance of the relay.

Application

Household Appliances, Car automative system, Electronic equipment , instrument, TV-5, TV-8 Remote control TV receiver, Monitoring equipment, Audio equipment etc.

Image

 

 

 

Product knowledge

No Related Product knowledge!

Good Methods

No Related Good Methods!

Contact message