BKL Electronic 074290 Heat Shrink Tubing 3:1 Black 3mm/1mm 200m

With a 3:1 shrink ratio, this heat shrink tubing recovers from 3 mm to 1 mm, providing a tight, professional seal for electrical connections. The 200 m spool offers ample length for large projects or continuous production use.

Overview

BKL Electronic 074290 is a black polyolefin heat shrink tubing designed for electrical insulation, wire bundling, and mechanical protection. It is cross-linked for durability and remains flexible after shrinking. The tubing operates from -55°C to +125°C and starts shrinking at +70°C, with full recovery at +110°C.

What stands out

• 3:1 shrink ratio for secure coverage over connectors and splices
• 200 m length reduces the need for frequent spool changes
• Dielectric strength of 20 kV/mm provides reliable insulation
• UL VW-1 flammability rating for safety in electrical applications
• Recovered wall thickness of 0.45 mm adds mechanical protection

Technical details

• Pre-shrink internal diameter: 3 mm
• Post-shrink internal diameter: 1 mm
• Shrink ratio: 3:1
• Length: 200 m
• Colour: Black
• Material: Polyolefin
• Operating temperature range: -55°C to +125°C
• Minimum shrink temperature: +70°C
• Full shrink temperature: +110°C
• Dielectric strength: 20 kV/mm
• Flammability rating: UL VW-1
• Voltage rating: 600 V
• Recovered wall thickness: 0.45 mm
• Cross-linked: Yes
• Flexibility: Flexible

Our verdict

A reliable 3:1 heat shrink tubing with excellent electrical and mechanical properties, ideal for demanding insulation tasks.