Siemens 6GK5991-1AE30-8AA0 SCALANCE X SFP991-1ELH200 100Mbps LC Single-Mode 200km SFP Transceiver

The Siemens 6GK5991-1AE30-8AA0 SFP991-1ELH200 is a 100 Mbps SFP transceiver for SCALANCE X switches, with a single LC port running 100BASE-LX over single-mode fiber for 61 to 200 km reach at 1550 nm. Its 1 to 5 dBm transmit power and -42 dBm receiver sensitivity give it the longest optical budget in the SFP991 family, and it carries FM and ATEX hazardous-location approval plus CCC Ex marking for China.

Technical Specifications

Certifications & Standards

• CE
• C-Tick
• EPD

Selection Notes

Specify the SFP991-1ELH200 only when the run genuinely needs 61 to 200 km of single-mode fiber; the 14 dB minimum attenuation requirement means it will saturate its own receiver on shorter links where a lower-power single-mode variant would work instead. Its 1 to 5 dBm transmitter output is the highest in the family, which is what buys the extended reach at the cost of needing more fiber loss between the two ends to stay in the receiver's working range.