Low Smoke Zero Halogen (LSZH) cable, also known as Low Smoke Free of Halogen (LSFOH) cable, is a type of wire insulation made with materials that emit limited smoke and no halogen when exposed to high sources of heat or flame. This makes LSZH cable a safer and more environmentally friendly alternative to traditional PVC-insulated cables, especially in enclosed or poorly ventilated areas.
Low smoke halogen free fire resistant cable
Why LSZH Cables Matter
In the event of a fire, conventional cables (like PVC or PE insulated types) can release thick black smoke and toxic halogen gases such as chlorine or fluorine. These gases can cause serious health hazards and hinder evacuation by reducing visibility.
LSZH cables, on the other hand:
Emit minimal smoke, improving visibility for evacuation.
Do not release toxic halogen gases, reducing the risk of acid gas inhalation and corrosion to electronic equipment.
Are RoHS-compliant and environmentally safer.
These characteristics make LSZH cables ideal for public spaces and mission-critical environments.
Common Applications of LSZH Cables
LSZH cables are widely used in:
Subways, airports, and railway stations
Data centers and server rooms
High-rise buildings and hospitals
Telecommunication centers and control rooms
Ships, submarines, and offshore platforms
In any location where fire safety, air quality, and human health are priorities, LSZH is the preferred cable type.
How LSZH Differs from PVC and Plenum Cables
| Feature | LSZH Cable | PVC Cable | Plenum Cable (CMP) |
|---|---|---|---|
| Smoke emission | Very low | High | Very low |
| Halogen content | 0% | Contains chlorine, fluorine, etc. | 0% |
| Toxic gas release | None | High | None |
| Flexibility | Moderate | High | Moderate |
| Fire resistance | High | Low | Very high |
Key Technical Features
Halogen content: ≤50 PPM
Light transmittance after combustion: ≥60%
pH of combustion gases: ≥4.3 (non-corrosive)
High insulation resistance: >10¹⁶Ω·cm
Operating temperature range: -20°C to 90°C or higher depending on design
Voltage ratings: Typically 300V, 600V, or 1000V
Types of LSZH Cables
LSZH power cables
LSZH control cables
LSZH data and communication cables
LSZH fiber optic cables
They are available in various core configurations and cross-sectional areas (e.g., 1.5mm² to 300mm²).
Is LSZH Cable Right for You?
If your project involves enclosed spaces or requires compliance with fire safety codes, environmental standards, or health regulations, then LSZH cables are the recommended choice.
While LSZH cables may cost slightly more than traditional PVC cables, the added safety, compliance, and long-term reliability often justify the investment.
Contact Us
Looking for high-quality LSZH cables at competitive prices? At TOT Wire & Cable, we specialize in supplying low smoke zero halogen cables for a wide range of industrial, commercial, and infrastructure projects.
📞 Get a quote today or message us for technical specifications and bulk orders.
