✅ Component type/category matches: Gas Discharge Tube (GDT) in DigiKey category Gas Discharge Tube Arresters (GDT).
✅ Manufacturer matches AVL requirement: Littelfuse Inc.
✅ Voltage - DC Spark Over (Nom): 75 V, exactly matches the required 75 V for PoE Ethernet surge protection.
✅ Impulse Discharge Current (8/20µs): 20000A (20kA), which exceeds the minimum required 10kA.
✅ Number of Poles: 2, matches the required 2-pole GDT for one Ethernet cable pair.
✅ Mounting Type: Surface Mount, matches the required SMD package.
✅ RoHS Compliance: ROHS3 Compliant, satisfies the RoHS requirement.
✅ Package description confirms SMD form: 2-SMD Cylinder Square End.
All required specifications are satisfied, so this Littelfuse part CG75MSTR is approved for the stated Ethernet port primary lightning surge protection application.