When selecting the right protection components for your design, you should consider the following key indicators and considerations to ensure that the component you select can effectively protect the circuit and meet your application requirements.
1. Working voltage: Make sure the rated operating voltage of the protection component is higher than the normal operating voltage of the circuit. If it is lower than the normal operating voltage of the circuit, an overvoltage condition and false triggers can occur.
2. Operating voltage: For TVS diodes and varistors, when selecting their breakdown voltage (or operation voltage), possible transient overvoltages in the circuit should be considered to ensure effective protection.
3. Maximum current: Ensure that the maximum current that the selected component can withstand is higher than the expected surge current or short-circuit current.
4. Response time: For transient protection components, such as TVS diodes, the response time should be as short as possible to quickly suppress transient overvoltages.
5. Energy absorption capacity: For MOVs and varistors, their maximum energy absorption capacity should be considered to ensure that they will not be damaged in surge events.
6. Leakage current: Ensure that under normal operating conditions, the leakage current of the protection component will not affect the normal operation of the circuit.
7. Environmental conditions: Consider the temperature, humidity, etc. of the working environment, and select suitable materials and packaging to ensure the stability of the component in a specific environment.
8. Package form: Select a suitable package form according to the design requirements for easy installation and heat dissipation.
9. Reliability and Shelf life: Consider the working lifecycle and failure mode of the components, and select high-reliability components to ensure long-term stable operation.
10. Standards and certifications: Ensure that the selected components meet relevant industry standards and certification requirements to ensure product quality and safety.
By comprehensively considering the above indicators, you can select the right protection components to effectively ensure the safety and stable operation of electronic equipment.