What are the characteristic parameters of the TVS diode?


TVS tube is a kind of high-efficiency protection device. When both ends are subjected to instant high energy impact, the TVS tube can instantaneously convert its high-resistance characteristics into low-resistance characteristics, and absorb high currents to clamp the voltage across the TVS tube. At a certain value (voltage resistance of the TVS tube), the backside circuit is protected against transient high-energy shocks, protecting the circuit. This article mainly introduces the characteristic parameters of the TVS diodes.

Characteristics of transient suppression diodes:

1. Reverse Off-State Voltage (Off-state Voltage) VRWM and Reverse Leakage Current IR: Reverse Off-state Voltage (Off-state Voltage) VRWM indicates the highest voltage at which the TVS tube is not conducting. At this voltage, there is only a small reverse leak. Current IR.

2. Breakdown voltage VBR: The voltage at which the TVS tube passes the specified test current IT, which indicates the voltage at which the TVS tube is turned on (the numbers in the P4SMA, P6SMB, 1.5SMC, P4KE, P6KE, and 1.5KE series models are the hits. The nominal value of the voltage to pass, the other series of figures is the reverse off-state voltage value). The breakdown voltage of the TVS tube has a ±5% error range (±10% without "A").

3. Peak pulse current IPP: The maximum peak current of the 10/1000 μs wave that the TVS tube allows to pass (about 8 times the peak current of 8/20 μs wave), and exceeding this value may cause permanent damage. In the same series, the higher the breakdown voltage, the smaller the peak current that can be allowed to pass.

4, the maximum clamping voltage VC: TVS tube flows through the pulse peak current IPP when the two ends of the voltage.

5.Pulse peak power Pm: Peak pulse power Pm refers to the product of the pulse peak current IPP of the 10/1000 μs wave and the maximum clamp voltage VC, that is, Pm=IPP*VC.


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