87063-028

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TVS – Varistors, MOVs

87063-028 are a type of voltage dependent resistor (VDR) called a varistor for short. It is used to protect sensitive electronics from voltage surges and overvoltages, normally found in circuit designs. They work by utilizing the principle of non-linear resistance, which means the resistance of the circuit increases as voltage increases. When an overvoltage or surge in voltage happens, the varistor acts like an electrical fuse and clamps it down, limiting the surge and saving sensitive electronics.

The 87063-028 is a specific type of varistor manufactured by SMC. It is a VLS and has a Maximum Clamping Voltage or MCV of 280V and a Maximum Rated Voltage or MRV of 310V. The capacitance at 1Khz is 27pF and the capacitance at 10kHz is 7pF. These are some of the key parameters that define how the 87063-028 will behave and the type of environment it is suitable for.

Working Principle: As an overvoltage or surge in voltage occurs, the 87063-028\'s semiconductive material start to conduct current in a non-linear fashion, clamping down the overvoltage and dissipating most of the energy in the form of heat. The difference between the MRV and MCV is known as the voltage surfing collapse, which is the maximum amount of overvoltage the varistor can withstand before it will be damaged.

Application Field:

The 87063-028 is typically used in AC line voltage protection circuits, DC line voltage protection circuits, and I/O signals. It is designed specifically as an AC line voltage protector and is suitable for both low-voltage (< 300V) and high-voltage (> 600V) applications. It is capable of handling transient voltages up to 2600V and is ideal for protecting against surges and spikes. The 87063-028 can also be used in DC line voltage protection circuits as it has an excellent response time and can handle transients of up to 2600V. Because of its low capacitance, it is ideal for I/O signals applications as well.

The 87063-028 is also suitable for high-frequency applications such as radio and telecommunications. It can handle up to 1GHz and is designed to protect sensitive electronics from spikes and surges. Because of its fast response time, it can also be used for primary EMI and RFI protection.

Conclusion: The 87063-028 is an excellent protection component for various applications and is an excellent choice for AC and DC line voltage protection, I/O signals, high-frequency applications, and primary EMI/RFI protection. The 87063-028 works by conducting current in a highly non-linear fashion, clamping down any overvoltage and ensuring sensitive electronics are not damaged.

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