SFTW203 1/2" BL SPL

SFTW203 1/2" BL SPL Datasheet

SFTW-203 Tubing

Part Datasheet
SFTW203 1/2" BL SPL SFTW203 1/2" BL SPL SFTW203 1/2" BL SPL (pdf)
Related Parts Information
SFTW-203-3/8-48-BLACK SFTW-203-3/8-48-BLACK SFTW-203-3/8-48-BLACK
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PDF Datasheet Preview
SFTW-203 Tubing
3:1 Very Flexible Polyolefin

Data Sheet

Product Description
3M SFTW-203 is a 3:1 shrink ratio tubing that offers an outstanding balance of electrical, physical and chemical properties for a wide variety of industrial and military applications. SFTW-203 is made of very flexible, heat-shrinkable polyolefin which is mechanically tough, chemically resistant, and can be easily surface printed.

SFTW-203 tubing has been engineered to offer a low shrink temperature of 100°C 212°F . This allows the tubing to shrink rapidly, and minimizes heat exposure and possible damage to temperature sensitive substrates.

SFTW-203 tubing meets the performance requirements of MIL-DTL23053/5 Class 1, and is UL Recognized File No. E48398 for flame retardance. It is rated for continuous operation from -55°C -67°F to 135°C 275°F , and withstands elevated temperatures of 300°C 572°F for brief periods.

The extra flexibility and low shrink temperature of 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 SFTW-203 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. SFTW-203 can also be used to insulate an oversized component in line to the wiring.

Shrink Ratio

SFTW-203 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 r e c o v e r y.

Standard Colors


Standard Packaging

Boxes of four-foot lengths, or large spools. Cut pieces subject to factory quotation.
Ordering Information

Order SFTW-203 by product name, size equivalent to expanded inner diameter, color, and package type. Always order the largest size that will shrink-fit snugly over the item to be covered. Example SFTW-203, 1/2", black, 4 ft lengths.

Typical Properties

Standard Sizes and Dimensions
Ordering Size
1/16 1/8 1/4 3/8 1/2 3/4 1/2

Expanded I.D.

1,5 3,0 6,0 9,0 12,0 18,0 24,0 39,0

Recovered I.D.


Note Dimensions in inches are approximate.

Recovered Wall

Thickness Nominal in. mm
0,45 0,55 0,65 0,75 0,75 0,75 1,00 1,15

Applicable Specifications

MIL-DTL-23053/5, Class 1 ULFile E48398;

CSA LR 38227


Tensile Strength
2600 PSI

Ultimate Elongation

Longitudinal Change

Secant Modulus
2% elong.
8700 PSI

Specific Gravity

Heat Shock

No cracking,
4 hrs. 250°C
or dripping

Water Absorption

Heat Aging

168 hrs. 158°C

Low Temperature Flexibility
4 hrs. No cracking

Flammability Self extinguishing


Dielectric Strength 700 V/mil Volume Resistivity 1015 ohm-cm
More datasheets: SFTW-203-3/4-BLACK | SFTW-203-1/4-48-BLACK | SFTW-203-1/2-48-BLACK | SFTW-203-1/16-48-BLACK | SFTW-203-1 1/2-48-BLACK | SFTW-203-3/4-48-BLACK | SFTW203 1/4" BL SPL | SFTW-203-1/8-48-BLACK | SFTW203 3/8" BL SPL | SFTW203 1/8" BL SPL

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived SFTW203 1/2" BL SPL Datasheet file may be downloaded here without warranties.

Datasheet ID: SFTW203 1/2" BL SPL 521434