Onsemi MBR30H100MFST1G 100V 30A Schottky Barrier Rectifier: Datasheet, Pinout, and Application Notes

The Onsemi MBR30H100MFST1G is a high-performance Schottky barrier rectifier designed for high-efficiency power conversion applications. This device is part of Onsemi's portfolio of power rectifiers, optimized for low forward voltage drop and high current capability. With a 100V reverse voltage rating and a 30A average forward current, this Schottky diode is well-suited for use in switch-mode power supplies (SMPS), DC-DC converters, reverse polarity protection, and freewheeling diodes.

Key Features and Electrical Characteristics

The MBR30H100MFST1G is built using Schottky barrier principles, which results in extremely fast switching and low forward voltage drop (typically as low as 0.55V at 15A). This low VF characteristic helps minimize power loss and improves overall system efficiency. The device also features a high junction temperature capability of up to 175°C, making it reliable in demanding environments.

Other important specifications include a reverse leakage current of less than 1.0 mA at 100V and 25°C, and a typical thermal resistance of 1.67°C/W (junction to case). The diode is packaged in a TO-220AB full-pack format, which provides good mechanical strength and thermal performance.

Pinout and Package Information

The MBR30H100MFST1G comes in a standard TO-220AB package with two pins: the anode and the cathode. The tab is also electrically connected to the cathode, which must be considered during mounting and heatsinking. The pinout is as follows:

- Pin 1 (Left Pin): Anode

- Pin 2 (Center Tab): Cathode

- Pin 3 (Right Pin): Not connected (N/C)

Proper heatsinking is essential for maximizing current handling and ensuring long-term reliability. The full-pack construction provides electrical isolation between the tab and the mounting hardware, simplifying installation.

Application Notes

This Schottky rectifier is ideal for high-frequency power conversion due to its fast recovery characteristics. It is commonly used in:

- Output rectification in switched-mode power supplies

- Freewheeling diodes in motor drive and inductive load circuits

- Reverse battery protection in automotive and industrial systems

- OR-ing diodes in redundant power supplies

When designing with the MBR30H100MFST1G, it is important to consider thermal management. A heatsink may be required when operating at high currents to keep the junction temperature within safe limits. Additionally, designers should ensure that the reverse voltage does not exceed 100V to avoid breakdown.

Summary by ICGOOODFIND

The Onsemi MBR30H100MFST1G is a robust 100V/30A Schottky barrier rectifier offering high efficiency, fast switching, and excellent thermal performance. Its TO-220AB package and electrical characteristics make it a preferred choice for power supply and conversion applications where low loss and reliability are critical.

Keywords:

Schottky Barrier Rectifier, Low Forward Voltage, High Current Rectification, TO-220 Package, Power Conversion