MUR405G – Integrated Circuit – onsemi

Rectifier Diode, 4A, 50V, DO-201AD

MUR405G – 4A, 50V Fast Recovery Rectifier Diode – onsemi

The onsemi MUR405G is a high-reliability fast recovery rectifier diode engineered for efficient power conversion in demanding circuits. Part of the SWITCHMODE™ series, this component delivers ultra-fast switching performance (35ns trr) and low forward voltage (890mV @ 4A), minimizing energy loss in high-frequency applications. Trust PCX for authentic obsolete components backed by same-day shipping and technical expertise.

Key Features

Current Rating: 4A Average Rectified (Io)
Voltage Rating: 50V Peak Reverse Voltage (Vr)
Ultra-Fast Recovery: 35ns Reverse Recovery Time (trr)
Low Forward Drop: 890mV @ 4A (Vf max)
Minimal Leakage: 5µA @ 50V Reverse Leakage
Robust Temperature Range: -65°C to +175°C Junction
Package: Axial Lead (DO-201AA/DO-27), Through-Hole Mount

Technical Specifications
This standard-technology rectifier diode features an axial package (Supplier Device Package: Axial) compatible with automated insertion. Its fast recovery speed (<500ns) ensures reduced switching noise in high-frequency designs. The device operates across industrial/extreme temperature ranges (-65°C to +175°C junction temperature) with consistent leakage performance under maximum reverse voltage conditions.

Typical Applications

High-efficiency switching power supplies (SMPS)
DC-DC converter freewheeling diodes
Voltage clamping and snubber circuits
Battery charging systems
Industrial motor drives

About onsemi
onsemi (formerly ON Semiconductor) is a global leader in power management and energy-efficient solutions. For over two decades, their SWITCHMODE™ product line has set industry standards for reliability in power conversion, serving automotive, industrial, and computing sectors. onsemi’s rigorous quality controls and vertically integrated manufacturing ensure consistent performance in critical applications.

The company’s commitment to innovation is reflected in their extensive portfolio of discrete semiconductors. onsemi components undergo exhaustive validation testing, making them preferred solutions for designers prioritizing thermal stability and long-term durability. Their expertise in rectification technologies supports next-generation energy-efficient systems worldwide.

About Rectifier Diodes
Rectifier diodes are fundamental semiconductor devices that convert alternating current (AC) to direct current (DC) by allowing current flow in one direction. Fast recovery types like the MUR405G are optimized for high-speed switching applications where rapid turn-off characteristics prevent voltage spikes and reduce electromagnetic interference (EMI). Their efficiency directly impacts thermal management and power density in modern electronics.

In power supply design, selecting appropriate rectifiers involves balancing forward voltage drop, recovery speed, and thermal handling. High-speed diodes minimize switching losses in PWM controllers and inductive loads, making them essential in switch-mode