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Loaded with a generous combination of high quality components, near indestructible all-metal case and enhanced noise filtration system, Isobars offer the highest level of protection. Robust surge suppression circuits with sine-wave tracking offer extreme levels of protection against the heaviest surge conditions exceeding IEEE 587 category A & B specifications and reducing 6,000V test surges to harmless levels under 35 volts. Isobar''s unique protection system combines large torroidal chokes, ferrite rod-core inductors, HF/VHF capacitors and multiple layers of metal oxide varistors into a complete surge and EMI/RFI noise reduction system.