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3M 8440 Silicone Rubber Cold Shrink Connector Insulators

Category Polymer , Thermoset , Rubber or Thermoset Elastomer (TSE)
Manufacturer 3M
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF 3M 8440 Silicone Rubber Cold Shrink Connector Insulators.pdf
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Material Notes:
3M™ Cold Shrink Connector Insulators 8440 Series are open ended, silicone rubber, tubular sleeves. The sleeves are factory expanded and assembled on a removable supporting plastic core. Each rubber assembly is supplied fro field installation in this pre-stretched condition. As the core is unwound, the insulating sleeve shrinks to form a tight seal. Three sizes of Cold Shrink Insulators cover terminal lug barrels and three sizes of Cold Shrinks Insulators cover inline connectors. Each insulator type, collectively has an application range of 0.35” (8.86 mm) to 0.95” (24.13 mm) for installations on #6 AWG to 3/0 AWG.Information provided by 3M
Physical Properties Metric English Comments
Density 1.23 g/cc
0.0444 lb/in³
Mechanical Properties Metric English Comments
Hardness, Shore A 48
48
ASTM D2240-75
Tensile Strength, Ultimate 8.55 MPa
1240 psi
ASTM D412-75
100% Modulus 0.00124 GPa
0.180 ksi
Tear Strength Test 1.28
1.28
[Mpa], Die B; ASTM D624B-73
Electrical Properties Metric English Comments
Dielectric Strength 21.4 kV/mm
543 kV/in
7 days @ 90°C in water; ASTM D149-75
21.8 kV/mm

@Thickness 1.78 mm
554 kV/in

@Thickness 0.0700 in
ASTM D149-75
Descriptive Properties Value Comments
Appearance Gray
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