The IUGN66-1-72-1.00, IUGN family is a sealed toggle version of the IUG family. The silicone rubber seal around the handle assures panel seal integrity and makes this style a natural for harsh environments. Dimensions of this circuit breaker are: 38.48 mm x 50.8 mm x 42.85 mm. Operating temperature range is from - 40 °C to + 85 °C.