Ceramic terminal blocks are designed for high temperature applications. Type DIN-46284-ST and 4011-B. Specifications . Insulating Material: Porcelain KER 111, DIN 40685 white. Upper Temperature Limit: 200°C/392°F. Type 560-K4DF-V2A Specifications. Insulating Material : Steatite, KER 220 DIN 40685, white. Upper Temperature Limit : 500°C/932°F. UL File E69841. CSA File LR24322.