A disc pad, commonly known as a brake pad, is an essential component in a vehicle’s braking system, primarily used in disc brakes. It is designed to create friction with the brake disc (or rotor) when the brake is applied, helping to slow down or stop the vehicle. Brake pads are typically made from a combination of friction materials such as metallic compounds, ceramics, or organic materials, which are bonded to a backing plate. The quality and composition of the brake pad material significantly affect the braking performance, noise, dust generation, and durability.

When the driver presses the brake pedal, hydraulic pressure from the braking system forces the brake caliper to squeeze the brake pad against the rotating brake disc. The friction generated between the pad and the rotor slows the wheel's rotation and ultimately brings the vehicle to a stop. Over time, the friction material on the disc pad wears down due to constant contact with the rotor, and regular maintenance and replacement are necessary to ensure optimal braking performance.