10GBASE-T SFP+ in a fanless Netgate 6100 runs at 73 C, above its 70 C rating

Question

A QSFPTEK 10GBASE-T SFP+ module installed in port ix1 of a passively cooled Netgate 6100 reported 73 C through DDM although the room was at 20 C; the module is specified for 0-70 C and up to 2.5 W. The poster asked for known-good RJ45 SFP+ modules that stay within spec. Hardware involved: Netgate 6100, QSFPTEK 10GBASE-T SFP+ (30 m).

Hardware: Netgate 6100
Transceivers: QSFPTEK 10GBASE-T SFP+ (30 m)
Form factor: SFP+

Symptoms / messages:

module temperature 73 C exceeds 70 C maximum
DDM high temperature

waverunner63 · Answer

10GBASE-T SFP+ modules are power hungry and all tested models run very hot; they are unsuitable for fanless appliances withotu active airflow.

netadmin · Answer

A lower-power 10GBASE-T model was mentioned in another thread but not tested; fibre or DAC is the practical alternative.

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