HellermannTyton 300-31900 Heat Shrink Tubing 3:1, 3.0mm Black, 1m, Polyolefin, Halogen-Free

With a 3:1 shrink ratio and a 0.50 mm recovered wall thickness, this HellermannTyton 300-31900 heat shrink tubing delivers robust insulation and strain relief in a compact 3.0 mm supplied diameter. The black polyolefin sleeve shrinks to 1.0 mm when heated, creating a tight, professional seal for wire splices, connectors, and cable bundles.

Overview

Manufactured from cross-linked polyolefin, this thin-wall tubing is flexible yet durable, with a continuous operating range from -55 °C to +125 °C. It begins shrinking at +90 °C, allowing fast installation with a heat gun. The material is halogen-free and self-extinguishing (UL94 V2), making it suitable for use in confined spaces where fire safety is a concern.

What stands out

• 3:1 shrink ratio recovers to 33% of its original diameter for a secure fit over irregular shapes.
• Excellent electrical insulation: dielectric strength of 20 kV/mm.
• Resistant to common fluids, solvents, and UV exposure, ensuring long-term reliability.
• Halogen-free and RoHS compliant, meeting environmental standards.
• Supplied in a convenient 1-meter length, easy to cut to size for multiple jobs.

Technical details

• Material: Polyolefin (POX), black
• Supplied inner diameter: 3.0 mm; recovered inner diameter: 1.0 mm
• Recovered wall thickness: 0.50 mm
• Length: 1 m (1000 mm)
• Shrink ratio: 3:1
• Operating temperature: -55 °C to +125 °C
• Minimum shrink temperature: +90 °C
• Dielectric strength: 20 kV/mm
• Tensile strength: 15 MPa; elongation at break: 400%
• Flammability: UL94 V2 (self-extinguishing)
• Approvals: RoHS compliant
• Halogen-free: Yes

Our verdict

An ideal choice for electrical insulation, bundling, and mechanical protection in automotive, industrial, and electronics applications. Its 3:1 shrink ratio and robust polyolefin construction ensure a reliable, professional finish every time.