onsemi MBRS130LT3 Schottky Barrier Rectifier: Datasheet, Pinout, and Application Circuits

The MBRS130LT3 from onsemi is a highly efficient Schottky barrier rectifier designed for high-frequency switching applications. Its low forward voltage drop and fast switching characteristics make it an ideal choice for power supply circuits, reverse polarity protection, and freewheeling diodes. This article provides a detailed overview of its datasheet specifications, pinout configuration, and practical application circuits.

Datasheet Overview

Key electrical characteristics extracted from the datasheet define the performance of this component:

- Average Forward Current (IF(AV)): 1A

- Peak Forward Surge Current (IFSM): 30A

- Repetitive Peak Reverse Voltage (VRRM): 30V

- Forward Voltage Drop (VF): Typically 0.5V at 1A (at 25°C)

- Operating Junction Temperature (TJ): -65°C to +125°C

The low forward voltage is a standout feature, minimizing power loss and improving overall system efficiency. The device is packaged in a compact SMB (DO-214AA) surface-mount package, making it suitable for space-constrained PCB designs.

Pinout Configuration

The MBRS130LT3 is a two-terminal device with a simple pinout:

- Pin 1 (Anode): Marked with a line on the body of the diode.

- Pin 2 (Cathode): Connected to the case or the tab, typically identified by the blank side of the package.

Correct polarity is critical during installation. The cathode terminal is often connected to the positive rail in a reverse polarity protection circuit or to ground in a output rectification setup.

Application Circuits

1. Switching Power Supply Output Rectifier:

In DC-DC buck converters or SMPS outputs, the MBRS130LT3 is used as the output rectifier. Its fast recovery time prevents reverse recovery losses, allowing the converter to operate at high frequencies (hundreds of kHz) with high efficiency.

2. Reverse Polarity Protection Circuit:

A Schottky diode is placed in series with the positive input power line. Under normal operation, the low VF ensures minimal voltage loss. If the input polarity is reversed, the diode becomes reverse-biased, blocking current and protecting sensitive downstream components.

3. Freewheeling Diode:

In inductive load circuits (e.g., with relays or motors), the MBRS130LT3 is placed in parallel with the inductor. When the driving switch (e.g., a MOSFET) turns off, the diode provides a path for the inductive kickback current to circulate, protecting the switch from voltage spikes.

Why Choose the MBRS130LT3?

This diode offers an excellent balance of low power dissipation, high surge current capability, and a compact form factor. It is particularly valuable in battery-powered devices where every millivolt of drop translates directly into reduced runtime.

ICGOODFIND: The onsemi MBRS130LT3 Schottky rectifier is a robust and efficient solution for modern electronic designs. Its excellent electrical characteristics, proven reliability, and versatility in high-frequency applications make it a go-to component for engineers seeking to optimize performance and efficiency in power management circuits.

Keywords: Schottky Barrier Rectifier, Low Forward Voltage, Reverse Polarity Protection, Output Rectifier, SMB Package.