ERZ-E10E201 Circuit Protection

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TVS – Varistors, MOVs, is an important component products for protecting circuits and promote users’ safety in electronic products, such as Ers-E10E201. This article will introduce the application filed, working principle and features of Ers-E10E201.

Application filed

Ers-E10E201 is an electronic product, applied for the protection of voltage transient across automotive cables. In the specification of Ers-E10E201, its peak pulse current Ipp is rated at 2.2kA (10/1000us) and clamping voltage Vc at 30V. The Ers-E10E201’s application includes surge protection in Automotive system, it can play a role in protecting data bus, audio inputs and various automotive couplers as well.

Working principle

Ers-E10E201, like all other Varistors MOVs, is a voltage-variable resistance with a breakdown voltage that cannot be specified precisely. It appears as non-linear electric resistance in the circuit, working in two different type: voltage protection mode and impedance protection mode.

When the polarization current Ip is applied, it will become high-resistance state, equivalent to an open circuit. But in a short period, it can undergo conduction when the applied surge voltage exceed the breakdown voltage. That is to say, during the occurrence of surge voltage, it will begin to conduct and it is effortless for a surge voltage with 1/4 of the conduction voltage. The surge voltage should be close to zero after it going through the effect of varistor.

During the breakdown voltage increases, its conduct possesses equal sign and resonance, equal sign appears when the varistor is of inductance effect, while resonance forms when dynamic electric capacitance is present. Varistor MOV is normally designed with low inductance and high capacitance to reduce the effective capacitance of the protection circuit. It also simplifies the circuit design.

Features of Ers-E10E201

Ers-E10E201 is designed to offer surge protection for automotive cables and other sensitive equipment. Its features as follow:

• Low clamping voltage
• Halogen-free cordset
• Low contact resistance
• High pulse current
• Compact design
• Easy to install

The low clamping voltage is designed to limit the maximum permissible overvoltage. Its halogen-free cordset is designed to reduce the risk of environmentally harmful halogens materials such as chlorine and bromine. Low contact resistance and high pulse current enhance its accuracy and stability, and the compact design provides more flexibility for installation. Moreover, its design is user-friendly as it is easy to install.

Conclusion

In conclusion, Ers-E10E201 is applied for surge protection in automotive system, include data bus, audio inputs and couplers. Its working principle is based on the characteristic of varistor MOV, which possesses low inductance and high capacitance. The features of the Ers-E10E201 makes it capable of low clamping voltage, environment protection, and user-friendliness, as well as accuracy and stability.

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