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The MBRA340T3G is a medium-current, surface-mount Schottky barrier rectifier diode from onsemi. Housed in an SMA (DO-214AC) package, it features a reverse voltage of 40V and an average forward rectified current capability of 3A. Its core advantages are its very low forward voltage drop and fast reverse recovery characteristics. Designed to provide low-loss, high-reliability solutions for switch-mode power supplies, DC-DC converters, and efficient rectification circuits, it is particularly suitable for power electronics designs where space is constrained and high efficiency is demanded.
Category:Discrete Semiconductor Products;Diodes;Rectifiers;Single Diodes
Mfr:onsemi
Packaging:Tape & Reel (TR);Cut Tape (CT)
Part Status:Active
Technology:Schottky
Voltage - DC Reverse (Vr) (Max):40 V
Current - Average Rectified (Io):3A
Voltage - Forward (Vf) (Max) @ If:450 mV @ 3 A
Speed:Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr:300 µA @ 40 V
Mounting Type:Surface Mount
Package / Case:DO-214AC, SMA
Supplier Device Package:SMA
Operating Temperature - Junction:-55°C ~ 150°C
Base Product Number:MBRA340
Low Conduction Loss: At its rated current of 3A, the maximum forward voltage drop is only 450mV, significantly lower than standard fast-recovery silicon diodes of comparable rating. This translates to substantially reduced power loss during conduction in rectification or freewheeling applications, improving overall system efficiency, especially beneficial for battery-powered devices and low-voltage, high-current scenarios.
Fast Switching Performance: As a Schottky diode, it exhibits a very short reverse recovery time (<500ns) and minimal reverse recovery charge. This effectively reduces switching losses and electromagnetic interference in high-frequency switching circuits (e.g., SMPS), enabling higher operating frequencies and power density.
Compact Power Package: The standard SMA (DO-214AC) surface-mount package offers 3A current handling capability while maintaining a small PCB footprint and low profile, suitable for high-density power module designs.
High Junction Temperature Capability: A wide operating junction temperature range of -55°C to 150°C provides ample thermal margin, ensuring stable and reliable operation under high ambient temperatures or heavy load conditions.
Good Thermal Performance: The SMA package features relatively low thermal resistance, facilitating effective dissipation of heat generated by the die through PCB copper pours, enhancing practical current-carrying capability.
High Reliability: Meets industrial-grade standards, suitable for demanding automotive, industrial, and communication applications.
Switch-Mode Power Supply Output Rectification: Serves as a high-efficiency rectifier diode in the secondary side or freewheeling path of AC-DC adapters and DC-DC modules (e.g., Buck, Boost).
Polarity & Reverse Polarity Protection: Used at power input ports to prevent damage to downstream circuits from incorrect power supply connection.
Freewheeling Diode: Provides a discharge path for back-electromotive force (back-EMF) generated when inductive loads (motor drives, relay coils) are switched off.
High-Frequency Rectification: Used in high-frequency power conversion circuits like Power Factor Correction (PFC) and inverters.
Solar Panel Bypass Diode: Prevents hot-spot formation in photovoltaic modules when individual cells are shaded.
The MBRA340T3G is a high-performance medium-power Schottky rectifier diode. It achieves an excellent balance between low forward voltage drop, fast recovery characteristics, and a compact surface-mount power package. For any low-voltage, medium-to-high current rectification or freewheeling application aimed at optimizing efficiency and minimizing size, this device is an ideal choice. It effectively reduces system energy consumption and thermal design pressure, making it a key component for enhancing the performance of modern switch-mode power supplies and power electronic systems.
Industry Information
