| Dyfarniad presennol/cyffredin/LEC | U120BP\/146H | U120BP\/146H | U120BP\/146H |
| Diamedr D (mm) | 260 | 280 | 320 |
| Gofod H (mm) | 146 | 146 | 146 |
| Llwybr llygadu L (mm) | 400 | 450 | 550 |
| Cyfuno sochet (mm) | 16 | 16 | 16 |
| Lwyddiant mecanigol (kN) | 120 | 120 | 120 |
| Prawf cyffredinol mecanigol (kN) | 60 | 60 | 60 |
| Foltid ymddygiad ar ddiwedd brydref (kV) | 45 | 50 | 55 |
| Foltid ymddygiad drydenyn yn ddiweddar (kV) | 110 | 125 | 140 |
| Foltid ymddygiad dirwyn (P.U) | 2.8 | 2.8 | 2.8 |
| Foltid ymddygiad dirwyn brydref (kV) | 130 | 130 | 130 |
| Foltid dylanwad radio (μV) | 50 | 50 | 50 |
| Prawf corona goffogaeth (kV) | 18/22 | 18/22 | 18/22 |
| Foltid llif brydref | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA |
| Pwysau net y nit (kg) | 5.4 | 5.8 | 9.2 |
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