Power transformers, audio transformers, coupling transformers, inductors and pin, wire and SMD-mounted current transformers insulated to meet class B, F or H of UL. Waterproof and dust-proof variants are available for open air using. The products are designed for a lifetime of at least 10 years, and undergo environmental trials, including trials of temperature impact, heat endurance and low or high humidity endurance. UL and IEC standards are followed, as well as ISO9001, 13485 and 14001.