NORTHROP GRUMMAN SPERRY MARINE 65810816-6 REV.C P81 PSU P/N 301116 MARINE POWER SUPPLY UNIT

NORTHROP GRUMMAN SPERRY MARINE 65810816-6 REV.C P81 is a dedicated marine switch-mode power supply PCB assembly for Sperry Marine vessel navigation and radar systems, part number 301116. The power supply psu converts shipboard 110/220V AC main power into multiple isolated DC output rails, supplying stable operating voltage for Sperry radar transceiver, signal processing board and navigation console electronics. The power supply psu integrates input EMI filter, overvoltage, overcurrent and short-circuit protection circuits to suppress voltage spikes and power grid disturbance from vessel low-voltage network. The power supply psu monitors internal output voltage and temperature; in case of hardware failure, it triggers fault signal and sends diagnostic alarm to the main navigation control unit. The power supply psu adopts multi-channel isolated output design to avoid cross-interference between radar high-speed signal circuits and low-voltage logic circuits.

NORTHROP GRUMMAN SPERRY MARINE P81 PSU is designed as rack/plug-in PCB assembly, installed inside Sperry marine radar cabinet. The marine power supply board has conformal coated circuit board to resist salt mist, humidity and vibration onboard vessels, complying with IEC 60945 marine navigation equipment standard. The marine power supply board has built-in thermal protection, automatically cuts off output when temperature exceeds threshold to prevent component burnout. The marine power supply board has dedicated edge connector for convenient hot replacement during maintenance. The marine power supply board is a legacy spare assembly for older Sperry Marine radar systems.

NORTHROP GRUMMAN SPERRY MARINE 65810816-6 REV.C P81 PSU is widely fitted on cargo ships, tankers and offshore vessels for Sperry marine radar navigation system power supply. The industrial spare part can replace defective power supply boards to restore multi-rail stable DC power feeding for radar transceiver and navigation signal processing hardware rapidly. The industrial spare part matches original PCB mechanical dimension and edge connector pin definition for direct cabinet replacement. The industrial spare part has clear part marking 65810816-6 REV.C and 301116 for fast identification and stock management. The industrial spare part reduces vessel downtime during radar cabinet overhaul and marine radio survey inspection.