Alcatel Lucent 3BA73012AB Power Supply Module

The Alcatel Lucent 3BA73012AB is a high‑efficiency DC/DC power supply module designed for use in carrier‑grade telecommunications and networking equipment. This module converts a nominal -48 VDC input into stable, regulated lower‑voltage DC outputs required by line cards, control processors, and fabric modules. It is a critical component in ensuring continuous, clean power delivery to mission‑critical systems, with built‑in redundancy and protection features.

Overview

The 3BA73012AB is a field‑replaceable unit (FRU) that fits into designated power slots in Alcatel Lucent chassis. It features a high‑frequency switching topology for excellent efficiency and minimal thermal dissipation. The module is designed for hot‑swap operation, allowing replacement without interrupting system service. It also includes comprehensive monitoring circuits that report voltage, current, and temperature to the chassis management controller.

Key Features

• Input: -40 to -72 VDC (nominal -48 VDC)

• Output: Multiple regulated DC rails (e.g., +3.3V, +5V, +12V) with tight tolerances

• Total output power: up to 600 W

• High efficiency > 88% at typical load

• Hot‑swappable for zero‑downtime maintenance

• Over‑voltage, over‑current, over‑temperature, and reverse‑polarity protection

• Active load sharing for parallel redundancy (N+1)

• I²C interface for remote monitoring

Technical Specifications

• Input Voltage Range: -40 VDC to -72 VDC

• Input Current: 15 A max

• Output Voltages: +3.3V @ 40 A, +5V @ 20 A, +12V @ 15 A (typical)

• Total Output Power: 600 W

• Ripple & Noise: < 50 mV on each rail

• Efficiency: > 88% (full load)

• Isolation: 1500 VDC input‑to‑output

• Operating Temperature: 0°C to 50°C

• Dimensions: 132 mm (H) × 86 mm (W) × 280 mm (D)

• Weight: 2.5 kg

Applications

This power module is used in Alcatel Lucent 7750 SR routers, OmniSwitch chassis, and optical transport platforms. It is ideal for central office, data center, and remote site deployments where reliable DC power is available and redundancy is required.

Management and Monitoring

The module provides real‑time status via the backplane management bus. Administrators can read output voltages, currents, and temperatures through CLI or SNMP. Alarms are generated for any out‑of‑range condition, enabling proactive intervention.

Installation and Maintenance

Insert the module into the power slot and secure with the ejector handles. The system automatically recognizes the module and balances load with other power supplies. Maintenance includes periodic cleaning of air vents and checking for LED fault indicators. The hot‑swap feature simplifies replacement.

Conclusion

The Alcatel Lucent 3BA73012AB power supply module offers reliable, efficient DC‑DC conversion with full protection and monitoring. Its robust design and redundant operation ensure continuous system power, making it a dependable choice for critical network infrastructure.