Cold start
Cold start is not a running claim; validate with the actual supply.
Guide 02 / temperature
−20…+60 °C is a board rating, not an enclosure promise.
24 documented boards: −20…+60 °C. TIM800B: −10…+60 °C. The rating travels with the board, not the enclosure.
Board-level ranges from spec cards; storage varies.
Derating / where the envelope narrows
Rated at the edge is not rated at full load at the edge.
Full load at the top of the range is a system test.
Inside the board / what changes
Parts, headroom and validation.
Wide-temperature parts, thermal headroom and validation at both ends. The rating is a board-level statement; the enclosure adds heat.
- Wide-temperature partsSelected for the stated range
- Thermal headroomReduced as ambient rises
- ValidationModel-specific, on request
- System deratingIntegrator's enclosure test
No board-level IEC 60068 report on file; ask per model.
Rating vs validation / two columns
The board is rated. The enclosure is validated.
| Board rating | System validation |
|---|---|
| Stated per model on the spec card | Performed in the finished enclosure |
| −20…+60 °C on 24 documented boards | Enclosure temperature, airflow and load |
| TIM800B −10…+60 °C | Cold start and hot soak |
| Board-level statement | Equipment-level certificate |
Derating checks / in order
Five checks before the design freeze.
Model values / four references
The same rating, four envelopes.
| Model | Envelope | Operating | Storage | DC input |
|---|---|---|---|---|
| TOP800B | Mini-ITX · 170 × 170 mm | −20…+60 °C | −40…+85 °C | 12–19 V |
| TIM600B | Mini-ITX · 170 × 170 mm | −20…+60 °C | −40…+85 °C | 12–19 V |
| AD30NU | NANO-ITX · 120 × 120 mm | −20…+60 °C | −40…+85 °C | 12–19 V |
| TIM800B | Mini-ITX · 170 × 170 mm | −10…+60 °C | −20…+70 °C | 12–19 V |
24 documented boards share the rating; TIM800B is the only −10 °C exception.
Rated boards / gallery
Boards the rating refers to.
Cold start, storage and transit
Three ranges that are not the operating range.
Storage
Many boards store to −40…+85 °C; TIM800B to −20…+70 °C. Storage is not an operating claim.
Transit
Transit adds shock and humidity; the rating does not cover it.
Board detail / thermal path
Four places heat leaves the board.
Before the design freeze
Three questions the rating cannot answer.
Does this apply to my model?
Check the spec card: 24 boards are −20…+60 °C; TIM800B is −10…+60 °C.
Is the protection level documented?
No board-level IEC 60068 report on file; request documents per model.
What must I validate in my enclosure?
Full-load ambient, altitude derating, airflow or conduction, cold start, storage and transit.
Next step / operating range
Send the ambient range and the enclosure.
Send the ambient range, altitude and load for the closest rated model. Quote within 24–48 h.
