onsemi

MUR140G

MUR140G Description

The MUR140G from onsemi is a high-performance, general-purpose rectifier diode designed for fast-switching applications. Part of the SWITCHMODE™ series, it features a 400V reverse voltage (Vr) and 1A average rectified current (Io), making it suitable for demanding power conversion circuits. With a fast recovery time of 75ns and low forward voltage drop (1.25V @ 1A), it minimizes power losses and improves efficiency. The diode is housed in an axial package, ensuring compatibility with through-hole mounting. Although marked as obsolete, it remains a reliable choice for legacy designs due to its robust performance and ROHS3 compliance.

MUR140G Features

• Fast Recovery: Ultra-low reverse recovery time (75ns) enhances switching efficiency in high-frequency circuits.
• Low Leakage: 5µA @ 400V ensures minimal power dissipation in standby modes.
• High Voltage Handling: 400V Vr rating supports industrial and automotive applications.
• Low Forward Voltage: 1.25V @ 1A reduces thermal stress and improves energy efficiency.
• Reliable Packaging: Axial through-hole design for easy integration into PCB layouts.
• Compliance: ROHS3, REACH Unaffected, and EAR99 certified for global use.

MUR140G Applications

• Power Supplies: Ideal for SMPS (Switched-Mode Power Supplies) and DC-DC converters.
• Freewheeling Diodes: Protects inductive loads in motor drives and relay circuits.
• Rectification: Efficient AC-DC conversion in LED drivers, inverters, and battery chargers.
• Industrial Electronics: Suitable for welding equipment, UPS systems, and power factor correction (PFC) circuits.

Conclusion of MUR140G

The MUR140G is a versatile, high-speed rectifier diode optimized for fast-switching, high-voltage environments. Its low trr, low Vf, and axial packaging make it a cost-effective solution for legacy and new designs requiring efficiency and reliability. While obsolete, its proven performance in power electronics ensures continued relevance in industrial, automotive, and consumer applications. For engineers seeking a balance of speed and durability, the MUR140G remains a compelling choice.