General
Shrink rate	3:1
Material	Polyolefin
Operation temperature	-55 °C
Storage temperature	-10 °C
Durability	24 months
Flame retardancy
UL approval
Thin-walled

The heat shrink tube WSB 3:1 Box 3.0-1.0 from RED is a thin-walled heat shrink tube made of cross-linked polyolefin, designed for the insulation and protective covering of cables, wiring, and electrical connections in industrial and craft applications. It features a shrink ratio of 3:1, enabling a wide range of applications with only a few sizes. The flexible and flame-retardant material properties make it suitable for various insulation tasks, particularly in workshops or on-site installation work.

Applications
The heat shrink tube is used to protect electrical wiring, cable bundles, connection points, or joints from mechanical stress, moisture, dust, and external influences. It is particularly advantageous in electrical installation, machine building, automation technology, and in the cabling of devices and systems, where reliable insulation and mechanical stabilization are required. The 3:1 shrink ratio allows for efficient processing, as the same tube type can be adapted to different cable diameters.

Functions and Features in Detail
The heat shrink tube is supplied in a dispenser box, ensuring space-saving storage and protection against dust and contamination. The carton features an integrated centimeter scale, enabling quick and precise measurement of tube sections. This simplifies on-site work and ensures efficient processing without additional measuring tools. The box is designed for use in workshops or mobile installations.

Technology Explained Simply
The heat shrink tube is made of cross-linked polyolefin, a thermoplastic material that shrinks back to its original, smaller form when heated. The 3:1 shrink ratio means the tube shrinks to one-third of its original diameter when heated. This allows it to fit tightly around the cable to be insulated, forming a dense, protective sleeve. The flame-retardant property reduces fire risk in electrical installations. The operating temperature range is from -55 °C to +125 °C, enabling use in various climatic environments. Storage should occur at temperatures from -10 °C to +40 °C and relative humidity below 75 % to maintain material quality. Shelf life is 24 months.

Compatibility and Accessories
The heat shrink tube is compatible with other products in the RED series. As suitable accessories, the heat shrink tube HIS-3-3/1-PO-X-BK (black, 308-30300) is offered, which also features a 3:1 shrink ratio and is suitable for similar applications. Using accessories from the same product family ensures uniform processing and visual harmony in the installation.

Installation and Mounting
Installation is performed by sliding the heat shrink tube onto the cable or connection to be insulated. It is then heated using a heat gun or other heating device, causing it to shrink and form a tight, shape-stable sleeve. The integrated scale on the box facilitates cutting to the required length.

Operational Advantages
The heat shrink tube provides reliable, durable insulation and mechanical stabilization. The flame-retardant material increases safety in electrical systems. The 3:1 shrink ratio reduces inventory requirements, as fewer sizes are needed. The dispenser box ensures clean, organized storage and facilitates quick measurement and processing. Material quality and UL certification guarantee suitability for industrial applications.