Various household appliances are used most frequently in summer, especially air conditioners. Electronic engineers need to consider circuit safety when designing power circuits to avoid potential safety hazards due to frequent use of electrical appliances. Many household appliances use AC220V power supply. Today, the editor of SOCAY will introduce an AC220V power supply protection solution to you:

Background

1. Global warming, more thunderstorms

2. After the power supply is damaged by lightning, it is very harmful

3. After the power supply is damaged by lightning, the maintenance cost is high

4. High surge protective equipment becomes an industry trend

Socay Solution and Components

Gas Discharge Tubes(GDTs)

GDT【SC2E5-600LL】DC Spark-over Voltage：600V±20%，Nominal Impulse Discharge Current（8/20μS）：5kA，Maximum Capacitance＜1.0pF，Minimum Insulation Resistance 1GΩ(at 100v); Medium level protection

GDT【SC2E8-600ML】DC Spark-over Voltage：600V±20%，Nominal Impulse Discharge Current（8/20μS）：10kA，Maximum Capacitance＜1.5pF，Minimum Insulation Resistance 1GΩ(at 100v); Advanced Protection

GDT【SC2H8-3500LL】DC Spark-over Voltage：3500V±20%，Nominal Impulse Discharge Current（8/20μS）：5kA，Maximum Capacitance＜1.5pF，Minimum Insulation Resistance 1GΩ,AC1500

Varisor 

MOV1/MOV2/MOV3【14D561K】Varistor Voltage（at1mA）：504V-616V，Withstanding Surge Current（8/20μS）：4500A，Maximum Clamping Voltage（at5A）：925V，Medium level protection

MOV1/MOV2/MOV3【20D561K】Varistor Voltage（at1mA）：504V-616V，Withstanding Surge Current（8/20μS）：6500A，Maximum Clamping Voltage（at5A）：925V，Advanced Protection

Application

1、LED street light power supply

2、Switch power supply

3、Air-conditioning power supply

4、Inverter power supply

5、Computer power supply

6、Induction cooker/rice cooker

7、Other AC94V-AC264V power supply

Application Notes

1. The solution meets surge test standards such as IEC61000-4-5, GBT17626.5, etc.

2. In the differential mode, MOV with fast response time was used to reduce the surge voltage between L and N lines.

3. In the common mode protection, MOV and GDT are connected in series to the PCB ground or the equipment shell to prevent the leakage current of the MOV.

4. The solution can pass 1.2/50-8/20μS combined wave differential mode, common mode 6.0KV surge test.

Remark: When AC1500V is required in the insulation class voltage test, we recommend GDTs with DC3500V.

To learn more about the application and part number of GDTs, please directly enter the website of Socay  to consult online customer service http://www.socay.com/