Select products by the circuit board you will use.

1 Fast response

Very fast operation against high pressure surge is possible.

2 Automatic recovery

The tyristor type surge protection element can design the holding current (IH) to be large and automatic circuit recovery possible.

3 Low junction capacitance (Cj)

It can be used for analog or digital communication systems.

4 Extensive lineup

The optimum product can be selected from the surge current rating 30～350A(10/1000µs)

5 Application example

The steep surge is absorbed by the surge protection element, and the surge of a particularly large energy can be effectirvely protected by using gas tube arrester (GDT) or zinc oxide varistor in combination.

1 Determining the off voltage VDRM.

The off voltage VDRM is determined from the maximum power supply voltage VB applied to the device

2 Determining the clamping voltage VCL

The clamping voltage VCL is determined from the maximum withstand voltage of the circuit (IC, LSI) to be protected.

3 Determining the surge resistance ITSM

The surge capability ITSM of the device is determined from the supposed surge current waveform.

4 Determining the holding current IH

The circuit short-circuit current IL is obtained from the maximum power supply voltage VB and the circuit impedance RL and IL>HL is gauranteed as self-restoration operation after the surge protection element operation. (Check the temperature characteristic chart because the holding current IH has temperature dependence)

5 Confirming the junction capacitance

Consider the dull waveform with high frequency and confirm the junction capacitance Cj of the surge protection element.