FeaturesThe HCTR was designed to meet the needs of control circuit transformer protectionCurrent limitation protects down stream components against damaging thermal and magnetic effects of short circuit currentsHCTR fuses meet the UL 508, paragraph 19.2.4 requirement that control circuit fuses used in equipment listed for use with more than 10 kA available must have an adequate interrupt rating and must be rejection typeHigh inrush time delayControl circuit transformers can experience inrush currents up to 85 times their full load current ratingHCTR fuses can be sized according to NEC and UL requirements and still allow the high inrush currents, with significantly more time delay than the UL minimum value of 12 sec at 200% for class CC fusesMelamine tube with nickel plated bronze endcap