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20/02/2026

Black thin wall heat shrink tubing
Art.-No. 300-73048 | TCN20-3.2/1.6-PO-X-GY

Meets UL224 VW-1 specifications, making it ideal for high-heat applications.

Tubing is 2:1, thin wall and self extinguishing providing good resistance to common fluids and solvents.

Heat Shrink Tubing 2:1

Tubing is 2:1, thin wall and self extinguishing providing good resistance to common fluids and solvents.
Low shrink temperature gives excellent physical and electrical performance.
Available in multiple diameters and lengths offering several options to fit specific needs.

Package size

30 m

300 m

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2:1 Heat shrink tubing - on reel & customized cut lengths >

Base Data

Application	TCN20 is suitable for a wide range of applications like electrical insulations, mechanical protection and cable bundling.
Brand Family	TCN20
Color	Gray (GY)
Description	TCN20 Heat Shrink is a general purpose, thin wall tubing used to protect electrical and mechanical wiring. Polyolefin material is self extinguishing and resistant against common fluids and solvents. The low shrink temperature and mechanical strength make this tubing widely used in the electric and electronics industry. Available in a wide range of diameters up to 2.0 (50.8mm) and multiple lengths. TCN20 Heat Shrink is UL224 125 °C 600V VW-1 and RoHS.
Elongation At Heat Aging	350%
Heat Aging Test	168h/160°C
Minimum Tensile Strength At Heat Aging	14MPa
PART DESCRIPTION	TCN20-3.2/1.6-PO-X-GY
Packaging Type	box
Part No.	300-73048
Product family	Insulation
Short Desc.	TCN20 is a thin wall, 2:1 ratio, black, heat shrink tubing. UL224 VW-1 (600V at 125C, Class 1)
Type	TCN20-3.2/1.6

Product Dimensions


For Object Outside Diameter	1.92-2.88 mm
Longitudinal Change After Shrinkage	+/-5%
Printable	No
Recovered Diameter (metric)	1.6mm
Shrink Ratio	2:1
Size (imperial)	1/8"
Supplied Diameter (metric)	3.2mm
Volume Resistance	10¹⁴ Ω cm
Wall Thickness (metric)	0.42mm

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Material and Specifications

Dielectric Strength	20kV/mm
Elongation at break (min.)	400%
Flammability	UL 224 VW-1
Halogen Free	No
Material	PO-X
Material	Polyolefin, cross-linked (PO-X)
Min. Shrink Temperature	+212 °F (+100 °C)
Operating Temperature	-67°F to +257°F (-55°C to +125°C)
REACH Conformity	No
ROHS compliant	Yes
UL File Number [Logo]	E143529 [cRUus]
UL Recognized (US and Canada)	Yes
UL Recognized (US)	Yes

Logistic and Packaging

Packaging 1 - Weight (kg)	1.569kg
Pkg. Qty.	300m

More Information

Calculators

Calculator tool for Heat Shrink Tubing

Calculator tool for Heat Shrink Tubing

for TCN20-3.2/1.6 - Art.-No.: 300-73048
In selecting the right shrink tubing size it is important to consider to "80:20 rule". Shrink tubing should recover at least 20% and maximum 80% of its potential shrink range.
According to which specification would you like to check if the selected product is suitable for your application?

diameter

Please enter either the smallest and/or the largest outer diameter of the substrate.

Min mm Max mm

Cross-Section

Please enter either the smallest and/or largest cross-section of the object to be covered.

Min mm² Max mm²

perimeter

Please enter either the smallest and/or largest perimeter of the object to be covered.

Min mm Max mm
Wall thickness calculator

Wall thickness calculator

for TCN20-3.2/1.6 - Art.-No.: 300-73048

Depending on the substrate dimensions when Heat shrink tubing is recovered the diameter and the wall thickness will change. This Calculator aims to offer a theoretical wall thickness for this situation.Please enter the outer diameter of the object to be covered

Outer diameter of object (A)

mm

Inner diameter of tubing after shrinking (B)

mm

Wall thickness fully recovered ( C )

mm

Solutions

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