MUR3040WTG

Overview

The MUR3040WTG is a silicon ultrafast rectifier diode manufactured by onsemi, housed in a TO-252AB (D2PAK) surface-mount package. It features a common cathode configuration with two internal elements. The device supports a repetitive peak reverse voltage of 400 V and an average forward current of 15 A. Key electrical parameters include a maximum non-repetitive peak forward surge current of 150 A, a maximum forward voltage of 1.2 V, and a maximum reverse recovery time of 75 ns.

Feature Summary

• Ultrafast soft recovery characteristics designed to minimize switching losses and electromagnetic interference during high-frequency operation.
• High surge current capability ensures robust performance against transient overcurrent events without device failure.
• Low forward voltage drop contributes to improved overall system efficiency and reduced thermal generation.

Applications

• Switch-mode power supplies requiring fast rectification
• Free-wheeling diodes in inductive load circuits
• High-efficiency DC-to-DC converters

Procurement Notes

Verify the specific manufacturer source, as this component type has been produced by multiple vendors including Motorola and Micro Commercial Components. Confirm that the datasheet corresponds to the ON Semiconductor specification for the MUR3040WTG variant. Ensure the package marking matches the TO-252AB form factor and check for lead-free compliance documentation if required for your assembly process.

Selection Notes

Select this component when a surface-mount solution is required for high-current rectification applications. The TO-252AB package offers superior thermal dissipation compared to smaller SMD packages while maintaining a compact footprint. Consider the 75 ns reverse recovery time for switching frequencies where standard recovery diodes would generate excessive heat or noise.

Part Context

This part belongs to the MUR series of ultrafast recovery rectifiers, which are engineered for high-efficiency power conversion. The 'W' suffix typically denotes the TO-252AB surface-mount package, distinguishing it from through-hole variants like the TO-218AC. These devices are widely used in industrial and consumer electronics to replace slower rectifiers for better performance.

Replacement Considerations

Direct substitutes include the MUR3040PTG (TO-218AC package) for through-hole designs, provided pin compatibility is addressed. Surface-mount equivalents such as the MUR3040WT from other manufacturers may be compatible if electrical ratings match exactly.