Low Smoke Zero Halogen (LSZH) Cables
Discover LSZH cables, short for Low Smoke Zero Halogen cables, also known as LSOH or Low Smoke Halogen Free cables. LSZH cables are made with materials that emit less smoke and toxic fumes when burned, making them a more environmentally friendly option. Smoke inhalation is also what causes most fire-related deaths.
LSZH cables are often used in public buildings and other areas with a risk of fire. LSZH cables are great for confined spaces with large amounts of cable in close proximity to humans or electronic equipment. The military was one of the first adopters as ships and submarines were the perfect use case for LSZH cables.
LSZH cables are also more heat resistant and have a longer lifespan than traditional cables. These specialized cables are designed to address critical safety concerns in the event of a fire, where smoke emissions and toxic fumes could pose serious risks to human health and vital equipment.
Unlike PVC cables and other insulation materials, LSZH cables produce minimal smoke and absolutely zero acidic gases when exposed to fire. This makes them an ideal choice for indoor applications in public areas, hospitals, schools, shopping centers, cinemas, police and fire stations, aircraft, and underground railway networks, where ventilation may be limited.
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LSZH vs. LSF Cables: A Crucial Distinction
It's important to clarify the difference between LSZH and LSF cables, as confusing them could have life-threatening consequences during a fire emergency. LSZH cable is rated for low smoke and halogen-free. This means that it produces minimal smoke and no toxic gasses when exposed to fire or extreme heat. LSF cable on the other hand, is made of PVC and releases toxic gasses when exposed to fire.
LSF cables are made using PVC compounds and may be labeled as "low smoke and fume" due to certain additives that aim to reduce smoke and HCl emissions. The additives are halogen-free and non-toxic, making the cables suitable for use in enclosed spaces. LSF cables are also flame-retardant and can be used in both domestic and commercial settings. However, these cables are not subject to strict standards, and they have been found to emit HCl levels exceeding 20% when burning.

On the other hand, LSZH cables meet stringent safety standards, making them a reliable choice for critical environments where fire safety is paramount. LSZH cables are non-flammable and self-extinguishing halogen- wires, meaning they are less likely to cause a hazardous situation in the event of a fire. Additionally, they emit less smoke and toxic fumes during a fire, creating a safer environment for those in the vicinity.
The Benefits of LSZH Cables: Safety and Peace of Mind
LSZH cables were developed in response to past fire incidents in transportation facilities and other locations, where fire safety was a major concern. These cables offer a range of benefits, such as maintaining visibility and reducing respiratory damage during emergencies, thanks to their low smoke characteristic. LSZH cables are also self-extinguishing, meaning they are designed to stop spreading the fire quickly. This makes them ideal for use in areas where a fire could be catastrophic, such as airplanes, subways, and other public transportation facilities. Additionally, their zero halogen material ensures the production of non-toxic, halogenated gases is minimized.
Are Low Smoke Zero Halogen Cables Worth the Investment?
While LSZH cables may be slightly more expensive compared to other cable types, the added cost brings invaluable safety and protection benefits. For facilities dealing with sensitive information, important equipment, or heat-generating computers, such as hospitals, data centers, or military installations, investing in LSZH cables is a prudent choice to ensure the safety of people and equipment during fire incidents. LSZH cables are also more durable and resistant to environmental factors, which makes them a good choice for long-term use. In addition, they are easier to install, which can help reduce overall costs.
Frequently Asked Question
In applications where safety, performance, and reliability are critical, LSZH cables are often used. As a result, they are typically specified for use in highly populated, enclosed public spaces where flame resistance, low smoke production, and reduced toxic/corrosive gas emissions are important.
In some applications, LSZH cables are not necessary, such as buried underground cables, submersible cables, and where there is no risk of life or equipment damage. In addition, there may be a lack of regulation concerning the use of LSZH cables, as well as a lack of information and knowledge.
Silicone wire is one of the best wires on the market. As well as being capable of handling high amperages, it is extremely flexible, stable, non-reactive, and can be used in extreme environments involving temperatures ranging from -55°C to over 200°C.