3M Heat Shrink Tubing SFTW-203 3:1 Very Flexible Polyolefin Data Sheet February 2019 Description 3M Tubing SFTW-203 is a 3:1 shrink ratio tubing that offers an excellent balance of electrical, physical and chemical properties for a wide variety of industrial and military applications. 3M SFTW-203 tubing is made of very flexible, heat-shrinkable polyolefin which is mechanically tough, chemically resistant, and can be easily surface printed. 3M SFTW-203 tubing has been engineered to offer a low shrink temperature of 100C (212F). This allows the tubing to shrink rapidly, and minimizes heat exposure and possible damage to temperature sensitive substrates. It is rated for continuous operation from -55C (-67F) to 135C (275F), and withstands elevated temperatures of 300C (572F) for brief periods. Agency Approvals & Meets requirements of: Self Certifications UL Recognized, File E-48398 CSA Certified, CSA LR38227 For RoHS and REACH information, please contact 3M Typical Applications The extra flexibility and low shrink temperature of 3M SFTW-203 tubing make it ideal for shrink-fit jacketing and insulation of flexible wire bundles and temperature sensitive components. The 3:1 shrink ratio makes 3M SFTW-203 tubing the insulation of choice for end terminations where the connector body is larger than the cable and for repair applications where the tubing must be slid over a connector. 3M SFTW-203 tubing can also be used to insulate an oversized component in line to the wiring. Shrink Ratio 3M SFTW-203 tubing has a 3:1 shrink ratio. When freely recovered, the tubing will shrink to 33% of its as-supplied internal diameter. The recovered wall thickness of the tubing is proportional to the degree of recovery. Standard Colors Black 1 of 3 3M Heat Shrink Tubing SFTW-203 Standard Sizes Recovered Wall and Dimensions Expanded I.D. Recovered I.D. Thickness Ordering Size (Minimum) (Maximum) (Nominal) In. (mm) In. (mm) In. (mm) 1/16 .059 (1,5) .020 (0,5) .018 (0,45) 1/8 .118 (3,0) .039 (1,0) .022 (0,55) 1/4 .236 (6,0) .079 (2,0) .026 (0,65) 3/8 .354 (9,0) .118 (3,0) .030 (0,75) 1/2 .472 (12,0) .157 (4,0) .030 (0,75) 3/4 .709 (18,0) .236 (6,0) .030 (0,75) 1 .945 (24,0) .315 (8,0) .039 (1,00) 1-1/2 1.535 (39,0) .512 (13,0) .045 (1,15) Note: Dimensions in inches are approximate. Typical Properties Technical information provided consists of typical product data and should not be used for specification purposes. Unless otherwise noted, all tests are performed at room temperature. Typical Value Physical Property US units (metric) Tensile Strength 2600 PSI Ultimate Elongation 400% Longitudinal Change 5% Secant Modulus (2% elong.) 8700 PSI Specific Gravity 1.29 Heat Shock No cracking, flowing or 4 hrs 250C dripping Water Absorption 0.2% Heat Aging Elongation 168 hrs 158C 350% Low Temperature Flexibility 4 hrs -55C No cracking Flammability Self-extinguish Typical Value Electrical Property US units (metric) Dielectric Strength 700 V/mil 15 Volume Resistivity 10 ohm/cm Typical Value Chemical Property US units (metric) Corrosion Resistance Non-corrosive Solvent Resistance Tensile Strength 1100 PSI Dielectric Strength 400 V/mil Fungus Resistance Inert 2 of 3