Relay News
When the latching relay contacts work in the closed state, in addition to some faults caused by the above-mentioned contact resistance, an accident called "cold welding" often occurs in miniature latching relays, especially reed latching relays. can't be togetherfreed. The cause of this cold welding is generally considered to be that the contact surface of the contact is under the action of pressure or slip, the surface film is destroyed, the direct metal contact area increases, and the total affinity between metal molecules increases.
Product features of 24V DC magnetic latching relay model 973L 1，Subminiature high power magnetic latching relay 2，16A contact switching capacity 3，Coil low power consumption: Single coil magnetic holding: 0.36w Double coil magnetic holding: 0.72w 4，It is suitable for low-power scenes, smart homes, smart IOT, wall switches, smart meters and other control systems
The contact resistance of power relay is an objective phenomenon, which can not be avoided at any contact. However, when we understand its essence and grasp its characteristics, we can further analyze its influencing factors and take corresponding measures to reduce or eliminate its impact.
Product features of Subminiature Power Relay Model 932 1，20A contact switching capacity 2，The dielectric withstand voltage between coil and contact is 5kV 3，High sensitivity, power consumption 0.2W 4，UL insulation class: Class F 5，Applicable to household appliances, intelligent furniture, leakage protectors, instruments, communication devices, intelligent remote control systems
Are these hazards of contact resistance manifested in any case? no, it isn't. Because the occurrence of this hazard is closely related to the circuit parameters closed by the contact. Different circuit parameters lead to different properties and hazards of contact resistance. For example, when the contact is used to close the circuit with high voltage and current (such as high-power power relay, contactor, etc.)
Subminiature Power Relay Model 932 parameter information： Overall dimensions：18.3*10.2*15.6mm Relay weight:6g Contact form：1A Contact load: 20A 277VAC Coil voltage：3V DC,5V DC,6V DC,9V DC,12V DC,18V DC,24V DC,48V DC Coil resistance (Ω± 10%):0.2W,0.45W between contact coilsvoltage: 5000VAC Between disconnecting contacts voltage: 1000VAC
When the dynamic and static contacts of the power relay work in the closed state, a certain pressure (contact pressure) is always applied to make them close contact with each other, so as to reliably connect the circuit and conduct the current. It is always hoped that the stronger the current conducting ability, the better. It is best to be like a whole piece of metal with the same shape and size.
Subminiature Power Relay Model 932 parameter information： Overall dimensions：18.3*10.2*15.6mm Relay weight:6g Contact form：1A Contact load: 20A 277VAC Coil voltage：3V DC,5V DC,6V DC,9V DC,12V DC,18V DC,24V DC,48V DC Coil resistance (Ω± 10%):0.2W,0.45W between contact coilsvoltage: 5000VAC Between disconnecting contacts voltage: 1000VAC
For a contact power relay, the contact is its actuator, which is the part it uses to tear and connect the circuit: the reliability and life of the power relay's work depend to a large extent on the quality of the contact's work. Therefore, we must pay full attention to this problem in order to correctly design and use it to provide the most reliable automatic devices for national economy and national defense construction.
Order description of Subminiature Power Relay Model 932 1) When it is used in a polluted environment (including H2S, SO2, NO2, and other dust pollutants), it is recommended to select plastic products and verify them in actual use; 2) After the relay is installed into the PCB board, the whole board needs to be cleaned. Contact our company in time to confirm the appropriate welding method and product specification; 3) For the application scenarios where capacitive load, lamp load and motor load lamps will produce high surge current at the moment of relay connection, it is recommended to use AgSnO2 material contacts; 4) If customers have any special requirements, they can contact our company to select the corresponding product model according to the characteristics after review