ABB 0764403A Diode Module for Power Protection Applications

The ABB 0764403A provides reliable reverse current blocking in DC power circuits. You can install this module in ABB drive systems and power supply panels. It prevents battery discharge through chargers during AC mains failures. This component suits uninterruptible power systems and redundant supply configurations.

Technical Specifications and Hardware Layout

This diode module measures 120 mm in height. Its width reaches 45 mm, and the depth equals 90 mm. The ABB 0764403A weighs approximately 0.42 kilograms. A single internal PCB holds two high-power Schottky diodes. The module contains no energy storage capacitors or batteries. Two separate screw terminals accept positive input lines from two sources. One common output terminal delivers the higher voltage to the load. A fourth terminal connects to the negative reference rail.

Electrical Ratings and Performance Characteristics

The ABB 0764403A handles a maximum continuous current of 25 A per input. Peak surge current reaches 150 A for 10 milliseconds. Each diode drops only 0.55 V at 25 A forward current. The reverse blocking voltage rating stands at 60 V DC maximum. Consequently, this module provides efficient OR-ing of two power sources. Thermal resistance from junction to case measures 1.5°C per watt. The integrated aluminum heatsink keeps junction temperatures below 125°C.

Installation and Practical Wiring Guidelines

You must mount this module vertically on a DIN rail or panel. Transitioning to wiring, use 4 mm² to 6 mm² stranded copper wire. The screw terminals require a 3 mm flathead screwdriver for tightening. For redundant supplies, connect each power source to a different input. A red LED on the module lights when both inputs remain active. The operating temperature range spans from -25°C to +85°C reliably.