Product Introduction

This toroidal magnetic core is produced from high‑performance VN02 soft magnetic material. It delivers stable initial permeability of 650 with ±20 percent tolerance, featuring low relative loss factor at 0.1MHz, high saturation magnetic flux density and superior electrical resistivity. The closed ring structure effectively reduces magnetic leakage. This core maintains steady magnetic properties across varying working temperatures, supporting long‑time continuous operation. It serves as key magnetic component to build inductors and common mode chokes for EMC noise suppression in various electronic power equipments.

Product Overview

VN02 material magnetic core is a cost‑effective soft magnetic toroidal core designed for EMC filter applications. It balances permeability loss performance and saturation characteristics. Its curie temperature exceeds 140 degree celsius with high resistivity over 10⁵ Ω.m. Thanks to stable temperature coefficient and moderate coercivity, the magnetic parameters will not fluctuate severely under complex working conditions. Customers can wind copper wire directly on the core to manufacture common mode chokes and EMI filter inductors. It supports mass production and can meet general industrial electronic reliability requirements.

Application Scope & Usages

1. Common mode choke coils for switching power supply units
2. EMC filter components for industrial control equipment
3. EMI noise suppression for new energy power conversion devices
4. Power line anti‑interference inductors for household electrical appliances
5. Signal filtering and noise reduction for communication power modules
6. Inductor assembly for battery charging and energy storage equipment

5 General FAQ for Magnetic Cores

Q1 What factors will affect the actual inductance value of wound magnetic cores A1 The actual inductance is affected by core permeability wire winding turns winding tightness and operating current. Working temperature and direct current bias condition will also bring changes to final inductance performance.

Q2 Why does magnetic core produce obvious noise during device operation A2 The noise mainly comes from magnetostriction effect of magnetic material. When alternating current passes through wound coils, periodic material deformation will generate vibration noise. Increasing core size or adjusting working magnetic flux density can help improve this situation.

Q3 Can I use one type of magnetic core to replace other different material cores directly A3 Direct replacement is not recommended. Different magnetic materials have different saturation flux density loss performance and permeability. You need to recheck working frequency current load and complete sample testing before formal replacement.

Q4 What storage requirements should we follow for magnetic cores A4 Magnetic cores should be stored in dry and room temperature environment. Avoid heavy impact scratch and moisture erosion. Keep away from high temperature environment to prevent material performance degradation before processing and winding.

Q5 How to judge whether the magnetic core reaches saturation status in real application A5 When magnetic core gets saturated, the actual inductance value will drop sharply. The whole component will generate extra heat and filtering effect will become worse. You need to reduce working current or select core with higher saturation flux density to solve this problem.