MBRA340T3G | datasheet | price | pdf onsemi

MBRA340T3G Supplier and ON MBRA340T3G Distributor in China – Rantle East Electronic

MBRA340T3G

The MBRA340T3G is a Schottky diode, and it’s commonly used in power supply and protection circuits. With a low forward voltage drop of around 0.45V, it reduces power loss, making it perfect for low-voltage applications. Its high-speed switching capabilities make it ideal for high-frequency tasks like DC-DC converters and power supplies.

It has a low reverse leakage current, which ensures minimal energy loss when it’s not conducting. Plus, the compact surface-mount package (DO-201AD) makes it a great fit for tight PCB designs.

This diode is built for durability and is reliable in power-sensitive applications, offering protection against voltage spikes and high current. It’s often used for power rectification, reverse polarity protection, and in battery-powered devices

MBRA340T3G Pinout and Polarity

For the Schottky diode, here’s how to connect the pins:

• Anode (Pin 1): This is the positive terminal, and it should be connected to the positive side of your circuit, like the input voltage or the power rail.

• Cathode (Pin 2): This is the negative terminal. Connect it to the output, ground, or negative voltage rail. The cathode is usually marked with a stripe or band to indicate its orientation.

Make sure the diode is connected correctly: the anode goes to the positive side and the cathode to the negative side to avoid malfunction.

MBRA340T3G Equivalent Schottky Diode

If you’re looking for a replacement for the MBRA340T3G, here are some options:

• SS14: It’s similar, but can handle higher peak currents (400A), making it great for higher power applications. Its operating temperature is slightly lower, between -55°C to 125°C.

• 1N5819: It matches the MBRA340T3G in forward voltage and reverse leakage current but has a lower reverse voltage rating, making it good for low to medium power applications.

• MBRS340T3G: This is a direct replacement with the same specs, making it easy to source if you need a quick swap.

Make sure to consider the current handling, temperature range, and reverse voltage rating when choosing your replacement.

MBRA340T3G Bridge Rectifier Circuit

The bridge rectifier circuit converts AC into DC. In this setup, four diodes (D1, D2, D3, and D4) work together to allow current to flow in one direction, whether during the positive or negative half-cycle of the AC input.

The MBRA340T3G diode fits perfectly here because of its low forward voltage drop (0.45V), which reduces power loss. Its fast recovery time helps it switch quickly during AC cycles. Plus, it has low reverse leakage, meaning it keeps current from flowing backward, making the whole circuit more efficient.

MBRA340T3G Flyback Converter Usage

The MBRA340T3G Schottky diode is perfect for use in flyback converters, which are common in power adapters and chargers. It’s mainly used for rectifying the high-frequency AC output from the transformer, turning it into DC.

One of its best features is the low forward voltage drop (0.45V), which reduces power loss—important for efficiency, especially at high switching frequencies. It also has fast switching and low reverse leakage, making it reliable during quick voltage changes and preventing energy loss. Plus, it can handle high surge currents, which is great for the high inrush currents that flyback converters often face during startup.

In a flyback converter, this diode ensures the current only flows in the right direction during both positive and negative cycles, helping maintain stable voltage and improving overall efficiency.

MBRA340T3G Reverse Voltage Protection Circuit

In the correct polarity setup, the diode is forward-biased, allowing current to flow from the power supply to the load. This ensures everything works as expected.

In the reverse polarity setup, the diode becomes reverse-biased, blocking the current from flowing through the load and preventing damage. Essentially, it acts as an open circuit, protecting the sensitive parts of your system.

The MBRA340T3G diode works perfectly here because of its low forward voltage drop (0.45V), ensuring efficient power transfer. Its fast switching speed helps it react quickly in reverse voltage situations, and it can handle up to 40V reverse voltage, making it ideal for protecting circuits in low to medium power applications.