SFP Loopbak (45.1)


SFP28 Passive Electrical Loopback ML4026-28, is used for testing SFP28 transceiver ports under board level tests. Substituting a fully featured SFP28 transceiver with the ML4026- 28 in loopback provides a cost effective low loss method for SFP28 port testing.

The ML4026-28 comes packaged in a standard MSA housing compatible with all SFP28 ports. High speed signals are electrically lopped back from TX side to RX side of the module, the differential TX pair is connected to the corresponding RX pair, and the signals are AC coupled as specified by SFP MSA HW specs. It provides an economical way to exercise SFP28 ports during R&D validation, production testing, and field testing.


The ML4026-28 provides SFP28 power Class 1, 2, 3 or 4(standard), loading using a customer supplied +3.3V voltage supply.