Notes / Selection
Industrial Motherboard Selection in 2026: A Buyer Checklist
A checklist that survives the datasheet: six ordered cuts from enclosure to documents, with the values to ask for at each step.
The CPU is one cut. The enclosure, I/O count, thermal path, lifecycle and documents decide the other five.
01 / Premise
The CPU is often the same. The package is not.
Two boards can carry the same processor and still differ in every decision that matters to a machine builder: input range, I/O count, thermal path, mounting holes, lifecycle and documents.
The checklist below treats the CPU as one cut among six. It starts with the enclosure, because the enclosure decides what will fit before the processor decides what it can run.
Model values in this note come from 28 current specification cards across 6 form factors. Where a card is silent, the checklist says so instead of filling the gap.
02 / The checklist
Six cuts, in order.
Run the cuts in this order. A later cut cannot rescue an earlier one: a 120 W board does not fit a 90 W enclosure, and a 5-year lifecycle does not fix a missing document.
- 01
Envelope
Measure the bay, the mounting pattern and the cable bend radius. Six form factors are available; the enclosure chooses one.
- 02
CPU per watt
Match the TDP to the thermal path. A 15 W NANO board and a 28 W 3.5-inch board need different heatsinks and different airflow.
- 03
I/O count
Count LAN, COM, USB and display before choosing a family. Four LAN ports narrow the list to one NANO-ITX card, PNM-5210.
02 / The checklist, continued
Cuts four to six.
- 04
Temperature at full load
Ask whether the rating applies at full load, and whether it is board or enclosure ambient. The two are not interchangeable.
- 05
Lifecycle
The industrial norm is 5–10 years. Ask how long the model, its BIOS and its drivers will stay available.
- 06
Documents
Request the current card, the test report and the revision. A missing report is an open item, not a detail for later.
03 / Envelopes
The envelopes on the same criteria.
The matrix uses envelope and card values. Seven Mini-ITX models have cards; the total is 28 across six envelopes.
| Envelope | Size | DC input | Expansion | COM / LAN | Cooling | Models |
|---|---|---|---|---|---|---|
| 2.5-inch SBC | 100 × 72 mm | 12 V class, per card | M.2, SATA | 2 / 1 on AD742A | Fanless heatsink | 4 |
| 3.5-inch SBC | 146 × 102 mm | 9–36 V on wide-voltage cards | M.2, SATA | 5–6 / 2 | Fan or fanless | 4 |
| 3.5-inch Wide | 155 × 117 mm | 9–36 V on both | M.2, SATA | 6 / 2 | Fan or fanless | 2 |
| Mini-ITX | 170 × 170 mm | 12–24 V or 9–36 V, per card | PCIe, M.2 | Per card | Fan | 7 |
| NANO-ITX | 120 × 120 mm | 9–36 V on PNM-5210 | M.2, Mini PCIe | 5 / 4 on PNM-5210 | Fan or fanless | 5 |
| NUC | 100 × 100 mm | 12 V class, per card | M.2 | Per card | Fanless | 6 |
03 / Plates
Envelope and model plates.
Envelope plates / one card per form factor
2.5-inch / AD742A 
3.5-inch / MSK-TL5003AW 
3.5-inch Wide / AD600Z3AW 
Mini-ITX / TOP600B 
NANO-ITX / PNM-5210 
NUC / AD600CA
Model plates / I/O and cooling detail
TOP800B / board face 
RP7003AW / 120 W card 
UT1003AW / header side 
TL500Z3AW / 90 W card
04 / Why it matters
Downtime is the cost the checklist is trying to avoid.
The note uses one cost figure: US$125,000 per hour of unplanned downtime, the median in the cited industrial survey. A machine specified once and supported for 5–10 years avoids a revalidation at year three.
That is why lifecycle and documents sit in the same checklist as the CPU. The cheapest board is not the one with the lowest unit price; it is the one that does not force a redesign.
- Median downtime cost
- US$125,000 / hour
- Industrial lifecycle norm
- 5–10 years
05 / Scope
Three questions about the checklist.
Is this generic advice?
The order is generic; the values are not. Each cut names a card value or a document to request, and the model examples come from current cards.
Which models does it apply to?
It applies to the 28 models in six form factors. The six wide-voltage models matter if the enclosure takes 9–36 V; four LAN ports narrow the list to PNM-5210.
What is still open?
MOQ, lead time and warranty are not stated on the cards; they are confirmed with your quote. Test reports are held per model and must be requested.
06 / Next step
Turn the checklist into a model shortlist.
Send the enclosure size, the operating range and the I/O count. We reply with the closest model and its specification card within 24–48 h.