I use one in CRS326-24G-2S+IN (passive cooling) running at 2.5G to hAP ax3. At 86F ambient RouterOS monitor shows
86C:
name: sfp-sfpplus1
status: link-ok
auto-negotiation: done
rate: 2.5Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
advertising: 10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full,10000M-full,2500M-full,5000M-full
link-partner-advertising: 10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full,2500M-full
sfp-module-present: yes
sfp-rx-loss: no
sfp-tx-fault: no
sfp-type: SFP/SFP+/SFP28
sfp-connector-type: RJ45
sfp-link-length-copper-active-om4: 1m
sfp-vendor-name: MikroTik
sfp-vendor-part-number: S+RJ10
sfp-vendor-revision: 2.16
sfp-vendor-serial: F0600396D91C
sfp-manufacturing-date: 22-02-15
sfp-temperature: 86C
sfp-supply-voltage: 3.316V
sfp-tx-bias-current: 0mA
eeprom-checksum: good
It's quite WARM to the touch. At 10G speed, @michaeln416 burnt fingers report is credible. At up to 89F, I have seen no shutdowns.