Low smoke zero halogen or low smoke free of halogen (LSZH or LSOH or LSOH or LSFH or OHLS) is a material classification typically used for cable jacketing in the wire and cable industry.
LSZH cable jacketing is composed of thermoplastic or thermoset compounds that emit limited smoke and no halogen when exposed to high sources of heat.

These cables are designed to emit minimal smoke when exposed to fire, enhancing visibility and safety.

They do not release toxic halogen gases, reducing the risk of harmful fumes during a fire.

Halogen low smoke cables are fire-resistant, helping to prevent the spread of flames in critical environments.

They are built with strong, durable insulation to withstand harsh conditions, ensuring reliable performance in demanding settings.