Copper SFP Differences

Hi MC-28,

he OPT-0051-xx and OPT-0015-xx are both specifications for the 1000BASE-T Copper Ethernet transceiver module. They are equivalent in function, what I understand these 051 or 015 codes can be country specific based on the product manufacturing

Here's some information about the OPT-0051-xx:
Features:
Hot pluggable SFP copper transceiver module
Data rate up to 1.25Gbps
Small Form factor Pluggable
Operates over Cooper Twisted Pair Cable
Maximum distance up to 100 m
IEEE 1000BASE-T standard
RJ45 Twisted Pair fiber optic patch cable
Type: SFP
Compatibility: F5 Networks compatible
Media Type: Twisted Pair Cable
Max. Distance: 100 m
Data Rate: 10/100/1000 Mbps
Temperature:Standard 0°-70°C

Here's some information about the OPT-0015-xx:
Features:
1000BASE-T Copper SFP Transceiver
Receiver sensitivity verified at both minimum distance and the 100m maximum range
Proper operation across its full operating temperature range, 0C to 50C
Support Up to 1.25Gb/s data links
Compliant with SFP MSA standard
Compliant with IEEE 802.3z
Hot-pluggable SFP footprint
Single 3.3V power supply
The compact RJ-45 connector assembly
Low power dissipation
The metal enclosure provides lower EMI
ROHS compliant and Lead-Free
1000 BASE-T operation in host systems with SERDES interface