ABB GBU72 3BHE055094R0002 silicon rectifier bridge module

Technical Specifications

1. Model and Code:
   • Model: GBU72.
   • Product Code: 3BHE055094R0002.
2. Package and Dimensions:
   • Package Type: GBU series plastic housing with epoxy resin potting, moisture-proof, dust-proof, and shock-resistant.
   • Terminal Layout: Four-terminal pin design, compatible with PCB mounting or bolt fixation.
   • Thermal Design: Potting-type package with a metal baseplate for direct散热器 (heat sink) attachment.
   • Dimensions: 62 mm (L) × 32 mm (W) × 26 mm (H) (typical).
3. Electrical Parameters:
   • Rated Average Rectification Current: 72 A.
   • Maximum Repetitive Peak Reverse Voltage: 800 V.
   • Peak Pulse Current (8.3 ms half-wave): 1300 A.
   • Forward Voltage Drop (per single tube, typical): ≤ 1.1 V @ 36 A.
   • Operating Junction Temperature Range: -40 °C to +125 °C.
   • Junction-to-Case Thermal Resistance: 0.45 °C/W.
   • Insulation Resistance (500 VDC): ≥ 100 MΩ.
4. Environmental Adaptability:
   • Operating Humidity: 5%–95% RH (non-condensing).
   • Vibration Resistance: Complies with IEC 60068-2-6 standards.
5. Installation:
   • Methods: PCB mounting or baseplate bolt fixation.
   • Thermal Recommendation: Use with aluminum heat sinks to maintain junction temperature below 100 °C.

Functional Features

1. High Reliability:
   • Epoxy potting ensures moisture/dust resistance and mechanical shock tolerance, suitable for harsh environments.
2. Low Thermal Resistance:
   • Junction-to-case thermal resistance of 0.45 °C/W minimizes heat dissipation challenges.
3. Wide Temperature Range:
   • Operates from -40 °C to +125 °C, adaptable to extreme conditions.
4. Flexible Installation:
   • Four-terminal design supports both PCB and bolt-fixed mounting.
5. Efficient Rectification:
   • High rated current and low forward voltage drop ensure efficient power conversion.
6. Safety Certifications:
   • Complies with IEC 60747-5-5 and UL standards. 100% power-on aging test before delivery.

Application Scenarios

1. Variable Frequency Drives (VFDs)/Servo Drives:
   • Provides stable DC bus power, ensuring reliable operation of motor control systems.
2. Uninterruptible Power Supplies (UPS):
   • Efficient rectification reduces battery charging/discharging losses, enhancing UPS efficiency.
3. Welding Equipment:
   • Withstands high surge currents to stabilize welding arcs, improving process quality.
4. Renewable Energy Inverters:
   • Serves as a DC rectifier module in photovoltaic (PV) or wind power systems for green energy conversion.
5. Industrial Power Systems:
   • Ideal for industrial power supplies requiring high-reliability rectification, such as in heavy machinery or automation lines.

Quality and Reliability

• Certifications: IEC 60747-5-5, UL.
• Testing: Subject to cyclic temperature, humidity, vibration, and shock tests. 100% power-on aging test with batch certificates.

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