Original Power-One / ABB electronic board with code 3L07-99-1 Pb-Free, designed as a switching power supply module (PSU) for industrial photovoltaic inverters in the Aurora 55 kW and 67 kW series.

This board plays a critical role in generating and managing the auxiliary voltages required for proper operation of the inverter’s control units and power circuits.

Its industrial design incorporates high-reliability components such as a switching transformer, toroidal inductors for EMI filtering, high-capacity electrolytic capacitors, protection fuses, and filtering circuits, ensuring stable performance even under demanding operating conditions.

An integrated aluminum heat sink and optimized layout provide efficient thermal management, making the module suitable for medium- to high-power inverter applications.

⚙️ Technical Specifications

• Board code: 3L07-99-1
• Compliance: Pb-Free (lead-free)
• Type: Switching power supply board (PSU)
• Manufacturer: Power-One / ABB
• Application: Aurora 55 kW / 67 kW inverters

Functions:

• Voltage conversion and regulation
• Supply of control and logic circuits
• EMI filtering

Main Components:

• Switching transformer
• Toroidal inductors
• Electrolytic and film capacitors
• Protection fuses
• Aluminum heat sink

Connections:

• Multi-pin board-to-board connectors

Mounting:

• Internal installation within inverter

🔧 Main Functions

• Generation of stable auxiliary voltages
• Support for inverter control boards
• Protection against overvoltage and overcurrent
• Reduction of electromagnetic interference

🔌 Compatibility

Compatible with:

• ABB / Power-One Aurora 55.0 kW
• ABB / Power-One Aurora 66.0 / 67.0 kW

(Always verify code 3L07-99-1 for exact compatibility)

📦 Applications

• Repair of industrial photovoltaic inverters
• Replacement of faulty power supply boards
• Maintenance of photovoltaic systems
• Professional OEM spare part

💡 Advantages

✔ Original ABB / Power-One spare part
✔ Clearly identifiable part number (3L07-99-1)
✔ High industrial reliability
✔ Optimized thermal dissipation
✔ Simple and fast installation