Patent ID: 6873505

Claim:
An electrostatic discharge protective device, said electrostatic discharge protective device comprising: a first bipolar junction transistor and second bipolar junction transistor, wherein, the base of said first bipolar junction transistor is connected together with the collector of said second bipolar junction transistor to form a first node, and the collector of said first bipolar junction transistor is connected together with the base of said second bipolar junction transistor to forming a second node; a first resistor, wherein said first node is coupled to the emitter of said first bipolar junction transistor, via first resistor, constituting a first pole; a second resistor, wherein said second node is coupled to the emitter of said second bipolar junction transistor, via said second resistor, constituting a second pole; and a triggering device, wherein said triggering device including a zener diode is placed between said second pole and said first node; wherein when a current flows through and breaks down said zener diode, said first bipolar junction transistor and said second bipolar junction transistor are triggered to be operated, when said current flows through but does not break down said zener diode, said first bipolar junction transistor and said second bipolar junction transistor are not operated.