The Eaton 3S series is no longer available from Eaton. The new models are Tripplite Internet Series UPS.
| Eaton Model | Description | Replacement Tripplite Series |
| 3S350 | EATON 3S 350VA (LOW VOLTAGE) | INTERNET350U |
| 3S550 | EATON 3S 550VA (LOW VOLTAGE) | INTERNET550U |
| 3S750 | EATON 3S 750VA (LOW VOLTAGE) | INTERNET750U |
