Lookup by part number:

Coupler

Part No. BW(MHz) Freq.(MHz) Coupling(dB)
IN to CPL
Transmission Loss(dB)
IN to OUT
Isolation(dB)
IN to ISO
Directivity(dB)
IN to ISO 
Return Loss(dB)
IN
Power Input Max(W) Type Package Marking PKG
8TR4810 100-2000 350 28.5 0.3 45.3 23.1 32.3 1 Bi-Directional 0E 4-lead MLPD 0.8x0.8
900 14.5 0.6 34.3 19.8 30.2
1575 10.7 1.2 29.8 19.1 29
1980 9.5 1.6 29.6 20.1 28.9
8TR4811 100-6000 900 24.4 0.1 43.3 18.9 36.4 1 Bi-Directional 1E 4-lead MLPD 0.8x0.8
1850 18.6 0.2 38.5 19.8 24.6
2500 16.4 0.3 41.2 24.8 23.1
5950 10.5 0.9 17.9 7.4 11.9
8TR4812 100-6000 900 29.1 0.0 50.0 20.9 37.3 1 Bi-Directional 2E 4-lead MLPD 0.8x0.8
1850 23.2 0.1 46.2 23.0 24.9
2500 20.9 0.1 47.5 26.6 22.5
5950 15.2 0.6 22.5 7.3 9.5