The Realtimes RTSO-4007 is the carrier board you're after — among the Jetson Thor carrier boards rated −40 to 85 °C with 25GbE, it exposes the most CAN ports: 7 CAN ports when paired with a Jetson Thor T5000 module (3 when paired with a T4000). realtimesa...realtimesai.com ↗“seven for T5000 or three for T4000”
It supports the Jetson Thor T5000 (128 GB) and T4000 (64 GB) modules, is rated −40 °C to 85 °C, offers two 25GbE SFP28 interfaces, and ships as a Fan/Fanless design with 9–28 V input. realtimesa... +2realtimesai.com ↗“two 25GbE SFP28 interfaces and two Ethernet IX connectors”realtimesai.com ↗“thermal.max_operating_temp_c=85 °C, thermal.min_operating_temp_c=-40 °C”realtimesai.com ↗“power.power_input=9-28 V, thermal.cooling=Fan/Fanless”
For completeness, two other boards meet all of your stated constraints, each with 4 CAN ports:
Jetson Thor carrier boards: −40 to 85 °C, 25GbE realtimesa... +1realtimesai.com ↗“thermal.max_operating_temp_c=85 °C, thermal.min_operating_temp_c=-40 °C”realtimesai.com ↗“io.max_ethernet_speed=25GbE”
| Product | Manufacturer | CAN ports | 25GbE | Notes |
|---|---|---|---|---|
| RTSO-4007 | Realtimes | 7 (T5000) / 3 (T4000) | 2x SFP28 | CAN count is module-dependent |
| D333 Panther | AVerMedia | 4 CAN-FD | QSFP (4x 25GbE on T5000) | Temp rating applies to the carrier board without audio; 12–36 V DC |
| DSBOARD-THRMAX | Forecr | 4 | 25GbE | 18–36 VDC, JetPack 7.x |
realtimesa... +5realtimesai.com ↗“io.can_port_count=7”professional.avermedia.com ↗“4x CAN-FD”forecr.io ↗“io.can_port_count=4”professional.avermedia.com ↗“Rated -40 to 85 C (carrier board, without audio), 12-36 V DC input”forecr.io ↗“18-36 VDC, JetPack 7.x”professional.avermedia.com ↗“1x QSFP (4x 25 GbE on T5000)”
A few things I could not determine from the catalog:
- RTSO-4007's 7-CAN count depends on which Thor module you install — the catalog lists 7 for T5000 and 3 for T4000, so the "most CAN ports" claim holds specifically with the T5000 module; with a T4000 it would fall below the 4 CAN ports of the other two boards. realtimesa...realtimesai.com ↗“seven for T5000 or three for T4000”
- The catalog does not state an operating-temperature condition (e.g. airflow requirement) for the RTSO-4007, so I can't confirm whether the −40 to 85 °C rating carries any caveats; for the D333, the rating explicitly applies to the carrier board without audio. profession...professional.avermedia.com ↗“carrier board, W/O audio”
Product pages: RTSO-4007, D333 Panther, DSBOARD-THRMAX.