• Preface
• Table of Contents
• Index
• References
• Media Response
• Chap. 2 - Resistors
• Chap. 3 - Capacitors
• Chap. 4 - Coils
• Chap. 5 - RC-LC Networks

In Table below we give you the classes insulating materials, sorted by their operational temperature, according to IEC85.

CLASS	LIST	INSULATING MATERIALS	MAXIMUM OPERATIONAL TEMPERATURE
Y	Main	Cotton, natural silk, synthetic wool, Rayon, paper and its products, wood, polyamide thread, urea resin, compressed paper, etc.	90°C
	Secondary	Polyethylene, polystyrene, vulcanized rubber, etc.
A	Main	The materials of the Y class ingrained in varnishes or oils, seluzolic film, polyester resin, etc.	105°C
	Secondary	Elastormers of butadiene-acryl-nitride, elastormers of polychloroprene.
E	Main	Bakelite, polypropylene, acetic resin, polyester, polycarmonated film, polyurethane, polyamide resin.	120°C
B	Main	Whitewash, mica and its products, glass fibers, glass fibers ingrained in varnishes and oils.	130°C
	Secondary	Polymonochlorofluoroethylene, crystallized polycarmonated film
F	Main	Glass fibers, whitewash	155°C
	Secondary	Inorganic materials ingrained in resins for endurance against high temperatures
H	Main	What is mentioned previously in the secondary list but in base of silicone resin	180°C
	Secondary	Smalted polyamide
C	Main	All inorganic materials without additional soldering materials, glasses, mica, crystals, ceramics, porcelains.	>220°C
	Secondary	Polyamide, polytetrafluoroethylene (teflon), etc.