AEI tags come in standard and high temperature varieties, including theAT5118 Standard Temperature AEI RF Identification Tag and the AT5133 High Temperature Rail Tag:

• AT5118 Standard Temperature AEI RF Identification TagDesigned to operate in the standard temperature ranges typically encountered in rail operations
• AT5133 High Temperature Rail TagDesigned to withstand extreme heat or cold in rail operations. This tag's heat-resistant outer coating can survive short-term heat exposure up to 350°F (177°C). It's beam-powered, so it doesn't need an internal battery. 

When choosing a heat-resistant RFID tag, it's important to consider the operating temperature range of the label and ensure it can reliably operate in the environment where it will be used.