P0720ZC Circuit Protection

Series:	SIDACtor®
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Voltage - Breakover:	88V
Voltage - Off State:	65V
Voltage - On State:	4V
Current - Peak Pulse (8/20µs):	400A
Current - Peak Pulse (10/1000µs):	100A
Current - Hold (Ih):	150mA
Number of Elements:	4
Capacitance:	50pF
Mounting Type:	Through Hole
Package / Case:	12-SIP

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P0720ZC application field and working principle

TVS - thyristors are an essential part of the modern day electronic system and are used in all kinds of applications. These components can be used to provide additional protection to sensitive electronic components and circuits from voltage spikes, static discharges, surges, and so on.The P0720ZC is a type of thyristor, also known as a SCR (Silicon Controlled Rectifier). This device has been around for many years and in its widest form, used as an electrical switch, with an input (control) voltage to switch the device on or off.The P0720ZC is specifically designed for automotive applications where it is common to use the SCR for the purpose of controlling the current through a motor. This device mainly works by taking in the control voltage from the control unit and regulating the motor current with its anode and cathode. The P0720ZC zener diode is a three-terminal device consisting of an anode, a gate, and a cathode. The gate is used to control the voltage across the anode and cathode terminals. The anode and cathode can be said to represent a two-terminal diode, with the gate being used to switch the device on or off. The main working principle is that when the control voltage (gate voltage) applied to the gate exceeds the breakover voltage, a conduction path is created between the anode and the cathode. This results in the current being controlled by the P0720ZC, as the anode voltage stays constant at the breakover voltage, while the current flows. The main advantage of the P0720ZC is that it has an enhanced protection against transient overvoltages due to its added zener diode. This enhanced protection comfortably allows the P0720ZC to be used in automotive applications, where a high degree of protection from transient events is required. The P0720ZC is also used as a zero-crossing detector, by utilizing the zener diode at the anode terminal and sensing the anode voltage as it reaches the breakover voltage. This type of detector is usually found in digital applications such as servo and stepper motor controllers, as it provides a reliable zero-crossing signal for the control circuit. In addition, the P0720ZC can also be used in conjunction with an RC snubber network for providing additional protection to the component. The connection of the P0720ZC’s gate terminal to the anode and cathode prevents the transition current from rising above the device’s maximum current rating. The P0720ZC si a powerful, automotive grade thyristor suitable for applications requiring an enhanced level of protection against transient voltage events. Due to its robust design, high performance, ease of use and affordable price, the P0720ZC is a popular choice for automotive applications.

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