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20/02/2026

Heat shrinkable tubing 2:1 (38.0/12.7 mm), self extinguishing and overexpanded, black, 30 m reel
Art.-No. 300-73210 | TCN20-38.0/12.7-PO-X-BK

TCN20 Overexpanded - reliable insulation with an enhanced shrink ratio.

Heat Shrink Tubing 3:1

Due to its thin wall TCN20 overexpanded is suitable for insulation of antennas.

This extremely fast shrinking, thin wall tubing with its high shrink ratio of approx.
3:1 is flexible, and self-extinguishing.
Its mechanical strength and resistance against chemicals and solvents make it suitable for a wide range of applications.

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Heat shrinkable tubing 3:1 - Self extinguishing >

Base Data

Application	Mechanical and electrical protection applications for parts with high diameter variances. This fast shrinking tubing makes it suitable for high volume production.
Brand Family	TCN20 Overexpanded
Color	Black (BK)
Elongation At Heat Aging	350%
Heat Aging Test	168h/160°C
Minimum Tensile Strength At Heat Aging	14MPa
PART DESCRIPTION	TCN20-38.0/12.7-PO-X-BK
Packaging Type	reel
Part No.	300-73210
Product family	Insulation
Type	TCN20-38.0/12.7

Product Dimensions


For Object Outside Diameter	17.76-32.94 mm
Length (metric)	30m
Longitudinal Change After Shrinkage	+/-5%
Printable	No
Recovered Diameter (metric)	12.7mm
Shrink Ratio	3:1
Supplied Diameter (metric)	38.0mm
Tube Shape	Flat
Volume Resistance	10¹⁴ Ω cm
Wall Thickness (imperial)	.95"
Wall Thickness (metric)	0.9mm

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Material and Specifications

Dielectric Strength	20kV/mm
Dielectric Strength test method	IEC 243
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
Volume Resistance test method	IEC 93

Logistic and Packaging

Packaging 1 - Weight (kg)	2.178kg
Pkg. Qty.	30m

More Information

Calculators

Calculator tool for Heat Shrink Tubing

Calculator tool for Heat Shrink Tubing

for TCN20-38.0/12.7 - Art.-No.: 300-73210
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 TCN20-38.0/12.7 - Art.-No.: 300-73210

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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