Technical Specifications For Surge Protector Choke Coil Components

The surge protective device choke coil component is a common-mode interference suppression device with a ferrite core. It consists of two coils of identical size and number of turns, symmetrically wound around a single ferrite toroidal core, forming a four-terminal device. It is designed to exhibit high inductance for suppressing common-mode signals, while exhibiting low leakage inductance, making it virtually ineffective against differential-mode signals. The surge protector choke coil component, when used in balanced lines, effectively suppresses common-mode interference signals (such as lightning interference) while having no effect on the differential-mode signals normally transmitted on the line.

The surge protection device choke coil component must meet the following requirements when manufactured:
1) The wires wound around the coil core must be insulated from each other to prevent short circuits between the coil turns under transient overvoltage conditions.
2) The core must not saturate when high transient current flows through the coil.
3) The core must be insulated from the coil to prevent short circuits between the two under transient overvoltage conditions. 4) The coil should be wound in a single layer whenever possible. This reduces the coil's parasitic capacitance and enhances its ability to withstand transient overvoltages.
6. 1/4 Wavelength Short Circuit