Thomas Betts HS40-400 Heat Shrink Sleeve 3:1 Black

Product Description

The THOMAS BETTS HS40-400 is a black polyolefin heat shrink tubing sleeve designed for wire insulation, strain relief, and environmental protection in electrical installations. It features a 3:1 shrink ratio, starting at 1.5 inches inside diameter and shrinking down to 0.5 inches, with an overall length of 8 inches. Rated for continuous operation up to 194 degrees F and with a shrink activation temperature of 248 degrees F, this sleeve suits demanding environments where abrasion, acid, and corrosion resistance are required. Licensed electricians and wire harness technicians are the primary installers.

This heat shrink sleeve is suited for residential and commercial electrical applications including wire splices, terminal protection, cable bundling, and connector insulation. It accommodates wire sizes down to 2/0 AWG, making it appropriate for heavier gauge conductors found in service entrance work, panel feeders, and industrial wiring. Sold in packages of 10, it is a practical stock item for electrical contractors and maintenance electricians who regularly service large-conductor wiring systems.

Key Features

• 3:1 shrink ratio transitions from 1.5 inches ID to 0.5 inches ID for a tight, secure fit over large conductors
• Polyolefin construction provides abrasion, acid, and corrosion resistance in harsh service environments
• 8-inch overall length accommodates splices, terminal ends, and connector bodies on heavy gauge wire
• Minimum compatible wire size of 2/0 AWG suits service entrance and feeder conductor applications
• UL Listed and CSA Certified for use in code-compliant electrical installations
• Maximum operating temperature of 194 degrees F supports high-load electrical service points

Compatibility

Designed as an OEM-style heat shrink sleeve for use on 2/0 AWG and larger conductors in general electrical wiring applications where a 3:1 shrink ratio and polyolefin construction are specified.

Installation Notes

Installation is performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the circuit before applying the sleeve over any conductor or termination. Use a heat gun set to the appropriate temperature range rather than an open flame to achieve uniform shrinkage and avoid damage to the tubing or adjacent insulation. Ensure the conductor and termination surfaces are clean and dry before positioning the sleeve.