Heat

Pen tablets

Pen tablets stay at ambient room temperature. They do not get hot or even warm.

If your pen tablet or its cabling gets noticeably warm or hot. Disconnect it and contact support immediately.

Pen displays

Pen displays either stay at room temperature or get very slightly warm - maybe close to human body temperature.

If your pen display or its cabling gets noticeably warm or hot. Disconnect it and contact support immediately.

Pen computers

These are essentially laptops. So they in theory can get warmer than pen tablets and pen displays which is normal for laptops. But your experience may vary depending on what you are doing.