What Are The Differences Between Magnet Remanence Br And Coercivity Hcj

What Are the Differences Between Magnet Remanence Br and Coercivity Hcj

When sourcing sintered neodymium magnets for motors, encoders and actuators, engineers frequently refer to remanence (Br) and coercivity (Hcj). These two core magnetic parameters decide how your magnet will perform in real‑world equipment, yet many buyers easily mix them up.

Remanence Br stands for residual magnetic flux density. It reflects the maximum magnetic strength the magnet can deliver. Higher Br means stronger magnetic output, which helps designers reduce magnet size while keeping required magnetic force. Br mainly influences magnetic flux, pull force and output torque of motors.

Intrinsic Coercivity Hcj represents the anti‑demagnetization ability of permanent magnets. Higher Hcj enables magnets to resist demagnetization caused by high temperature, reverse magnetic field or heavy load. Magnets with high Hcj, such as SH or UH grades, are widely used for motors with continuous heating.

Simply put: Br tells you how strong the magnet is; Hcj tells you how well it keeps its magnetism under harsh working conditions. When selecting magnet grades, you cannot only chase high Br. If your device runs at elevated temperature, sufficient Hcj is essential to avoid irreversible demagnetization.

As a professional neodymium magnet manufacturer, we assist global customers in grade selection according to Br and Hcj requirements. Feel free to contact us for technical support and competitive quotation for your magnet project.