It can be selected by the following 3 levels of Check and judgment.
Prevention of destruction of POSISTOR
Items to check (1) What is the power supply voltage of the circuit that uses the posister?
Judgment criteria (1) Maximum voltage of power supply voltage ≦ Maximum voltage of POSISTOR
↓
Prevention of malfunction
Items to check (2) When the circuit is operating normally, what is the current flowing to POSISTOR?
Judgment criteria (2) Normal current ≦ Holding current of POSISTOR
↓
Reliable protective operation
Items to check (3) What is the current flowing to POSISTOR when the circuit is in an abnormal state?
Judgment criteria (3) Abnormal current ≧ Trip current of POSISTOR