Brochure/Catalogue

T Hazardous areas guide
Temperature class
Certications worldwide
Classification of the maximum surface temperatures into
temperature classes for eletrical equipment of group II
Temperature class ATEX/IECEx Temperature class NEC/UL (AEx) Maximum surface temperature
T1 T1 450 °C 842 °F
T2 T2 300 °C 572 °F
T2A 280 °C 536 °F
T2B 260 °C 500 °F
T2C 230 °C 446 °F
T2D 215 °C 419 °F
T3 T3 200 °C 392 °F
T3A 180 °C 356 °F
T3B 165 °C 329 °F
T3C 160 °C 320 °F
T4 T4 135 °C 275 °F
T4A 120 °C 248 °F
T5 T5 100 °C 212 °F
T6 T6 85 °C 185 °F
IEC/DIN EN 60079-0 NEC500ff °C °F
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Technical appendix
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