21/02/2026

Heat Shrinkable Tubing 3:1 thin-wall 12.0/4.0 black on 30m reel
Art.-No. 333-42005 | TFN31 12/4-PO-X-BK

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  • Thin wall, flexible 3 to 1 shrink ratio material accommodates a wide range of component shapes and diameters.
  • Meets UL224 VW-1 specifications, making it ideal for high heat applications (excludes clear tubing).
  • Polyolefin material provides excellent insulation and mechanical strength with good resistance to solvents, oils and fuels.
  • Available in bulk reels, sticks and convenience bags (HIS-3 bags), for small to large volume applications.
Package size
Application If higher fire protection is a requirement heat shrinkable tubing TFN31 is a good choice. It is used for protection, insulation and identification wires, cables and light duty harnesses.
Behaviour At Low Temperature not cracking
Behaviour at Heat Shock not fluid, not dripping, not cracking
Behaviour at low Temperature test method UL 224
Color Black (BK)
Description TFN31 series heat shrink tubing features a flexible, thin wall and highly flame retardant polyolefin material with a higher operating temperature range than general-use heat shrink tubing. and offers good resistance to solvents, oils and fuels. The 3 to 1 shrink ratio accommodates a variety of component shapes and sizes. TFN31 tubing is available in bulk reels, sticks and convenience bags (HIS-3 bags), for projects of all sizes.
Elongation At Heat Aging 400%
Heat Aging Test 168h/175°C
Heat Shock Test 4h/250°C
Minimum Tensile Strength At Heat Aging 11MPa
PART DESCRIPTION TFN31 12/4-PO-X-BK
Packaging Type reel
Part No. 333-42005
Product family Insulation
Type TFN31 12/4
For Object Outside Diameter 5.6-10.4 mm
Length (metric) 30.0m
Longitudinal Change After Shrinkage -10% max.
Recovered Diameter (metric) 4.0mm
Shrink Ratio 3:1
Supplied Diameter (metric) 12.0mm
Volume Resistance 10¹⁴ Ω cm
Wall Thickness (metric) 0.80mm
CSA Certified Yes
Dielectric Strength 20kV/mm
Dielectric Strength test method IEC 60243
Elongation at break (min.) 600%
Elongation at break test method ASTM D2671
Flammability UL 224 VW-1
Halogen Free No
Material PO-X
Material Polyolefin, cross-linked (PO-X)
Min. Shrink Temperature +158 °F (+70 °C)
Operating Temperature -67°F to +275°F (-55°C to +135°C)
REACH Conformity No
ROHS compliant Yes
Test Method Tensile Strength ASTM D2671
UL File Number [Logo] E143529 [cRUus]
UL Recognized (US and Canada) Yes
UL Recognized (US) Yes
Volume Resistance test method IEC 93
Packaging 1 - Weight (kg) 0.75399kg
Pkg. Qty. 30m
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