Low-Smoke Zero-Halogen (LSZH or LSOH) communication and control cables are special cables that release very little smoke and do not produce toxic hydrogen halide gases in emergencies such as fires. Their core value lies not only in achieving signal or control functions, but also in ensuring personnel safety, protecting critical equipment, and meeting the green safety standards of modern buildings and industries. TST CABLE will introduce these cables from application scenarios, technical characteristics, and industry needs.
I. Core Application Scenarios of TST CABLE Low-Smoke Zero-Halogen Cables
Rail Transit (Metro, High-Speed Rail, Light Rail)
Tunnels and carriages are enclosed spaces, and smoke is the primary cause of death during fires; Used in train control systems, signal transmission, passenger information systems, and emergency lighting circuits; Mandatory compliance with fire protection standards such as EN 45545-2 (EU) and TB/T 3139 (China Railway).
High-Rise Buildings and Public Facilities
Office buildings, hospitals, schools, airports, stadiums, and other high-traffic areas;
Applications include building automation systems (BAS), fire alarms, security monitoring, elevator control, and other low-voltage systems;
Meets the requirements of GB 50116 “Code for Design of Automatic Fire Alarm Systems”.
Data Centers and Communication Rooms
Ensuring continuous operation of server, switch, and UPS control signals during a fire; Low smoke characteristics prevent smoke contamination of precision electronic equipment; Commonly uses LSZH + flame-retardant Class A/B structure, passing IEC 60332-3 bundled burning test.
Ships and Offshore Platforms
Enclosed compartments are extremely sensitive to toxic gases;
Used in navigation, communication, and engine room automation control systems; Must simultaneously meet IEC 60754 (halogen-free) and IMO FTP Code (International Maritime Organization).
Nuclear Power Plants and Cleanrooms
Nuclear Power: Prevents halogen corrosion of instruments inside the containment; Semiconductor/Pharmaceutical Plants: Prevents combustion products from contaminating the high-purity environment. II. Key Technological Advantages of TST CABLE Low Smoke Halogen-Free Cable (LSZH)
Characteristics: Traditional PVC Cable vs. TST CABLE Low Smoke Halogen-Free Cable (LSZH)
Smoke Density: High (transmittance < 20%) vs. Extremely Low (transmittance ≥ 60%, IEC 61034)
Halogen Content: Contains chlorine (releases HCl upon combustion) vs. Halogen content < 0.5% (IEC 60754-2)
Toxic Gases: Releases corrosive and asphyxiating gases vs. Mainly generates CO₂ and water vapor, with extremely low toxicity
Environmental Protection: Non-recyclable, contains plasticizers vs. Recyclable, RoHS/REACH compliant
Mechanical Properties: Soft, low cost vs. Slightly stiff, but modern formulations have significantly improved flexibility
✅ TST CABLE uses nano-modified polyolefin base material, maintaining high flame retardancy (oxygen index ≥ 32%) while improving cable flexibility and crack resistance, suitable for frequent bending scenarios.
III. Typical Structural Design of TST CABLE Low Smoke Halogen-Free Cable (LSZH)
Conductor: Tinned copper stranded wire (anti-oxidation, improves solderability);
Insulation: Low smoke halogen-free flame-retardant polyolefin (LSZH PO), stable dielectric properties;
Shielding (optional): Aluminum foil + tinned copper braid, EMI interference resistance (for RS485, Profibus, etc.);
Sheath: Same material LSZH, customizable color (commonly gray, orange, and blue to distinguish functions);
Complete Certifications: CE, RoHS, UL 444 (communication), IEC 60502-1 (control cables).
IV. Industry Trends and Value
Regulatory Driven: Over 60 countries worldwide mandate the use of LSZH cables in public buildings;
ESG Upgrade: Enterprises incorporate “halogen-free” into green procurement standards;
Lifecycle Safety: Although initial costs are 10-20% higher, significantly reduces the risk of fire-related injuries and equipment losses.
Low smoke halogen-free communication and control cables not only transmit signals but also protect lifelines.
In the midst of a critical moment filled with thick smoke,
it makes escape routes visible, alarm systems online, and rescue commands readily available—
this is the silent promise of modern safety infrastructure.
Choosing TST CABLE LSZH cable is not about spending more money, but about buying a guarantee of safety for “what ifs”.
Also available in:
English
