Server Technology Inc. R-4820 Sentry 48VDC Remote Power Manager 4820-0-8.Model Number: R-4820Part Number: 4820-0-8• Input Rating: A: -48VDC, 100A MAX; B: -48VDC, 100A MAX• Output Pair Rating: A1-A4 < 20A; B1-B4 < 20A; Aux < 5A Unswitched.