MicroFit
Small diameter, high shrink ratio,
heat-shrinkable tubing
MicroFit tubing is micro-sized, heat- Yet, upon heating, the same tubing low-outgassing materials. MTI000 tubing may
shrinkable tubing that offers a high shrink shrinks to fit tightly on a wide range of be sterilized by radiation, ethylene oxide,
ratio (up to 3:1) and fits a range of diameters substrate diameters. steam, and dry heat with no significant
from .007 to .045. It is offered in a variety of change in physical properties.
materials including two medical-grade MicroFit tubing is offered in three materials:
formulations from our Altera line of medical- RW-175, MT1000, and MT2000. MT1000 MT2000 tubing is made from a tough,
grade, heat-shrinkable tubing products. and MT2000 meet the requirements of modified polyolefin that offers flexibility,
U.S. Pharmacopeia (USP) Class VI. lubricity, and good electrical insulation
MicroFit tubing provides electrical insulation, performance. MT2000s low shrink temperature
mechanical protection, and strain relief in the RW-175 and MT1000 tubings utilize a tough enables the tubing to shrink faster than other
smaller, more compact medical devices and semirigid fluoropolymer. They are especially materials with similar attributes, thereby
commercial electronics products suitable for applications requiring high- reducing the risk of damage to temperature-
manufactured today. MicroFit tubings temperature performance, outstanding sensitive substrates. MT2000 tubing may
high shrink ratio eases installation since resistance to abrasion and cut-through, be sterilized by gamma radiation or
the tubings diameter is large enough to slide and excellent resistance to a variety of fluids. ethylene oxide with no significant change
easily over the micro-sized substrate. RW-175 meets NASA requirements for in physical properties.
Temperature rating
RW-175, MT1000
Full recovery temperature: 175C
Continuous operating temperature: 55C to 175C
Recommended maximum temperature 135C
for use as a primary insulator:
MT2000
Full recovery temperature: 140C
Continuous operating temperature: 40C to 105C
Specifications*
Type Raychem Material Master File Number
RW-175 RW-175 MicroFit SCD
MT1000, MT2000 Altera MicroFit SCD USP Class VI MAF-444 (MT1000), MAF-727 (MT2000)
*When ordering, always specify latest issue.
Dimensions (millimeters/inches)
W1
W2
Expanded as supplied
Fully recovered after heating
D d
Inside diameter Wall thickness
D (min.) d (max.) W1 W2 (max.)
Expanded Recovered after As supplied Recovered
Part number as supplied heating (nominal) after heating****
MFT-**-No. 1-*** 0.356 0.014 0.178 0.007 0.076 0.003 0.127 0.005
MFT-**-No. 2-*** 0.610 0.024 0.305 0.012 0.064 0.0025 0.152 0.006
MFT-**-No. 33-*** 1.143 0.045 0.432 0.017 0.064 0.0025 0.118 0.007
MFT-**-No. 65-*** 0.635 0.025 0.254 0.010 0.127 0.005 0.330 0.013
**Replace double asterisk with material number: RW-175, MT1000 or MT2000 ***Replace triple asterisk with color-code number. ****Wall thickness will be less if tubing recovery is restricted during shrinkage.
Ordering information
Colors RW-175, MT1000 MT2000
Standard Clear Black, clear
Nonstandard Black White, red, yellow, blue, orange
Size selection Always order the largest size that will shrink snugly over the component being covered.
A variety of special order sizes may be made available upon request.
Standard packaging In 4-foot lengths (RW-175); on plastic spools, double-bagged (MT1000, MT2000)
Ordering description Specify product name, material type, size, and color; for example, MFT-MT2000-No.1-0 (0=Black).RW-175 MicroFit specification values
Property Unit Requirement Method of test
PhysicalDimensions mm (inches) See reverse ASTM D 2671
Tensile strength psi (MPa) 5000 (34.5) minimum ASTM D 2671
2 per minute
Ultimate elongation percent 150 minimum ASTM D 2671
2 per minute
5
Secant modulus (expanded) psi (MPa) 1 x 10 (690) minimum ASTM D 2671
Heat shock No dripping, flowing AMS-DTL-23053,
(4 hours at 300C/572F) or cracking 5/16 mandrel
Low temperature flexibility No cracking after wrapping ASTM D 2671
(4 hours at -55C/-67F) on mandrel Procedure C
5/16 mandrel
Electrical Dielectric strength volts/mil (volts/mm) 800 (31,500) minimum ASTM D 2671
Altera MicroFit specification values
Property Unit Requirement Method of test
PhysicalDimensions mm (inches) See reverse ASTM D 2671
Tensile strength psi (MPa) ASTM D 2671
MT1000 5000 (34.5)minimum 2 per minute
MT2000 3000 (20.7) minimum
Ultimate elongation percent ASTM D 2671
MT1000 150 minimum 2 per minute
MT2000 200 minimum
Secant modulus (expanded) psi (MPa) ASTM D 2671
5
MT1000 1.0 X 10 (690) minimum
4
MT2000 5.0 X 10 (344) minimum
Electrical Dielectric strength volts/mil (volts/mm) ASTM D 2671
MT1000 800 (31,500) minimum
MT2000 1000 (39,360) minimum
Dielectric withstand seconds 60 minimum ASTM D 2671
3000 V, 60 Hz
Chemical Heavy metals analysis ppm 1 maximum (total of all metals) USP XXII
Cadmium Physiochemical
Mercury Tests - Plastics
Lead (See note below)
Bismuth
Antimony
Note: Sample preparation and extraction is per USP XXII. Metals analysis may be colorimetric as described in USP XXII or by equivalent quantitive analytical method.
Altera, Raychem, and MicroFit are trademarks of Tyco Electronics Corporation.
Users should independently evaluate the suitability of the product for their application.
Tyco Electronics Corporation
300 Constitution Drive Faraday Road 3816 Noborito, Tama-ku Asia Pacific Headquarters
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Tel:+1 (650) 361-3860 (All other countries)
All information, including illustrations, is believed to be reliable. Users, however, should independently evaluate the suitability of each product for their application. Tyco Electronics Corporation makes
no warranties as to the accuracy or completeness of the information, and disclaims any liability regarding its use. Tyco Electronics Corporations only obligations are those in the Standard Terms and
Conditions of Sale for these products and in no case will Tyco Electronics Corporation be liable for any incidental, indirect, or consequential damages arising from the sale, resale, use, or misuse of the
product. Tyco Electronics Corporations Specifications are subject to change without notice. In addition, Tyco Electronics Corporation reserves the right to make changes in materials or processing
without notification to the Buyer which do not affect compliance with any applicable specification.
For more information about this product visit www.tycoelectronics.com
1997, 2002 Tyco Electronics Corporation Printed in USA 1654059 6/02