HellermannTyton HIS-3 Heat Shrink Tubing Set, 3:1, 12 mm / 4 mm, Transparent, 10 Pieces 308-31215

For electrical installers and maintenance technicians who need reliable insulation and strain relief in tight spaces, this HellermannTyton HIS-3 heat shrink tubing set provides a 3:1 shrink ratio to conform snugly over connectors and splices. The transparent polyolefin tubing allows visual inspection of the underlying connection after shrinking, which is useful for quality control and troubleshooting.

Key specifications

• Shrink ratio: 3:1
• Supplied diameter: 12 mm
• Recovered diameter: 4 mm
• Colour: Transparent
• Quantity: 10 pieces
• Material: Polyolefin
• Operating temperature range: -55°C to +125°C
• Minimum shrink temperature: +90°C
• Dielectric strength: >20 kV/mm
• Flammability rating: UL94 V-2
• Recovered wall thickness: 0.8 mm

Why choose it

The high shrink ratio allows one size of tubing to cover a range of cable diameters, reducing inventory needs. The transparent material makes it easy to confirm that the connection is properly positioned and sealed. Polyolefin construction offers good chemical resistance and moderate UV resistance, suitable for indoor electrical work.

Ideal use cases

• Insulating and protecting soldered or crimped connections
• Bundling wires in control panels and junction boxes
• Providing mechanical protection and strain relief for cable entries
• Color coding when used with transparent tubing over colored markers

Good to know

The tubing shrinks at temperatures from +90°C and can withstand continuous operating temperatures from -55°C to +125°C. It is RoHS compliant, making it suitable for use in equipment sold in the European Union.