Conventional thermal detector for fire detection. The detector is composed of an element sensitive to temperature variations produced by any combustion process. The value measured by this element is compared with a preset reference value that causes the thermal fire detector to enter the alarm state when the temperature reaches 55ºC. Possibility of connection to a remote action indicator. Easy connection, without polarity. Head and socket easily installed, interchangeable throughout the A30X range, and made of heat-resistant white ABS.