RBQ20BM45AFHTL

Overview

The RBQ20BM45AFHTL is a surface-mount Schottky barrier diode manufactured by ROHM Semiconductor. It features a dual anode common cathode configuration within a TO-252AA (D-Pak) package, also identified as SC-63. The device supports an average rectified forward current of 20 A and withstands a repetitive reverse voltage of 45 V. Key electrical parameters include a maximum forward voltage of 0.59 V at 10 A, a peak forward surge current capability of 100 A, and a maximum reverse current of 0.2 mA at 45 V. It operates with a junction temperature up to +150 °C and meets the AEC-Q101 automotive grade standard.

Feature Summary

• Automotive-grade reliability compliant with AEC-Q101 standards for general rectification applications
• Dual anode common cathode configuration enabling efficient circuit design in compact packages
• Low forward voltage characteristics to enhance power conversion efficiency
• High thermal stability supporting operation at elevated junction temperatures

Applications

• Automotive DC-DC converter circuits
• General purpose rectification in vehicle electronics
• Power supply modules requiring high reliability

Procurement Notes

Verify the complete part number including the suffix to ensure correct packaging and automotive qualification. Confirm that the specific variant matches the required lead frame finish and tape-and-reel specifications for automated assembly. Cross-reference the manufacturer's latest datasheet to validate RoHS compliance status and any recent design changes affecting pinout or thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component when designing automotive systems requiring a 45 V rated Schottky diode with a 20 A continuous current capacity. The TO-252AA package offers a balance between thermal performance and board space efficiency compared to larger through-hole options. Ensure the application voltage does not exceed the 45 V rating under all transient conditions. Consider the low forward voltage drop for improved system efficiency in low-voltage power distribution networks.

Part Context

This component belongs to ROHM's RBQ series of high-efficiency Schottky barrier diodes designed specifically for automotive environments. The series emphasizes low forward voltage and low reverse leakage current to meet stringent energy efficiency requirements in modern vehicles. The RBQ20BM45AFHTL variant utilizes silicon technology to provide robust performance in power management applications where size constraints and thermal dissipation are critical design factors.

Replacement Considerations

Direct substitutes include the RBQ20NS45AFHTL which shares identical electrical ratings but utilizes a TO-263S (D2PAK) package. Designers must verify footprint compatibility and thermal pad dimensions when swapping between these package types. Other RBQ series variants with matching 45 V and 20 A ratings may serve as alternatives if package differences are accommodated in the PCB layout.