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Polyamide (PA 6.6) Polyamides are resistant to most fuels, Polyamide (PA 4.6)
WAGO uses modified, halogen-free, flame- greases and oils, as well as the most com- In comparison with PA 6.6, PA 4.6 has sub-
retardant polyamides according to IEC monly used cleaners, such as alcohol, Fre- stantially higher dimensional stability under
61249-2-2. These materials do not contain on, Frigen and carbon tetrachloride. heat. The relative temperature index RTI imp
any heavy metals, silicone, asbestos or with sudden loading is 115 °C for PA 4.6.
formaldehyde as formulation components. Acid resistance depends on the acid type
and concentration, as well as the exposure The reliable short-term temperature for the
The materials are corrosion neutral with time. type used by WAGO is 280 °C.
low-flammability and self-extinguishing char- More data can be found in the table.
acteristics (V0 classification according to The use of insulating materials during in-
UL 94). house production at WAGO only occurs
after acceptance of factory test certificates
Adhering to UL 746C, the polyamides used and specified material tests.
at WAGO have a continuous operating Polycarbonate (PC)
temperature of 105 °C based on the rela- Polycarbonate has excellent dimensional
tive temperature index RTI imp with sudden stability under heat. The mechanical prop-
loading. This ensures that the necessary erties of strength, hardness, rigidity and
electrical and mechanical insulating proper- Glass Fiber-Reinforced Polyamide (PA durability remain intact at extremely high
ties are maintained at sufficient, guaranteed 6.6-GF) temperatures up to approximately 135 °C.
levels over a long period of time. WAGO uses glass fiber-reinforced polyam- Its excellent electrical insulating properties
ides for components with increased and dimensional stability are virtually inde-
The short-term upper temperature limit is mechanical demands, such as levers, push- pendent of environmental conditions, such
200 °C. buttons or housings exposed to high stress- as humidity and temperature. Highly pre-
es, because glass-reinforced polyamides cise components can be realized due to the
In lower temperature ranges, it has been have significantly higher characteristic prop- low shrinkage of the material during injec-
determined that no damage to the insula- erties than non-reinforced polyamides. tion molding.
tion material occurs during usage down to Polycarbonate has excellent weather resis-
-35 °C. After installation and wiring, In general, materials are used that have tance and is also highly resistant to high-
WAGO products can even be used at tem- excellent creepage current resistance, flam- energy radiation.
peratures down to -60 °C. mability ratings and high temperature resis- If the PC is not colored, then the compo-
tance. nents are glass-clear.
Environmental humidity (up to 2.5 % in a Thanks to its desirable properties (e.g.,
standard atmosphere) is absorbed, provid- More data can be found in the table. dimensional stability, heat resistance, non-
ing the polyamides with optimum elasticity, flammability, durability and transparency),
strength and durability. PC is a proven and widely used material in
the electrical industry.
In practical use, basic stabilization of
WAGO’s polyamides has been proven Polyphthalamide (PPA GF) Depending on the demands placed on the
over many years as sufficient to prevent The glass fiber-reinforced, high-performance finished product, WAGO uses polycarbon-
damage caused by ozone or UV radiation polyamide PPA GF is designated for high- ates that carry flammability classifications
exposure in intended applications. temperature applications, due to the materi- V2 and V0 according to UL 94.
al’s high level of thermal dimensional stabil-
PA has excellent resilience against the most ity, its low dependence on ambient Medium-viscosity PC is used, and features
demanding climates and has proven itself conditions and its excellent strength charac- excellent chemical resistance.
tropical applications worldwide. teristics. The material’s outstanding tracking
resistance permits short creepage distances
Insulating parts made of polyamide are to be incorporated into miniature compo-
resistant to insects. The material does not nents. The halogen and heavy-metal-free
provide oxygen or other biogenic elements fire protection equipment (according to IEC
for microorganisms. 61249-2-2) enables placement into flam-
mability class V0 according to UL 94 —
The presence of anaerobic earth bacteria, even for extremely thin walls. PPA GF 14
mold, fungus and enzymes does degrage absorbs minute amounts of moisture from
the material. the ambient air, making it ideal for THR
applications and for thin-walled, dimension-
ally stable components.