MUR2040CT

Overview

The MUR2040CT is a dual common anode ultrafast recovery rectifier manufactured by Good-Ark Semiconductor. It features planar FRED wafer construction and is housed in a TO-220AB package. The device supports a maximum repetitive peak reverse voltage of 400 V and a maximum average forward rectified current of 20 A per leg at Tc=105°C. Key electrical parameters include a peak forward surge current of 125 A, a maximum reverse recovery time of 35 ns, and a junction-to-case thermal resistance of 2.0 °C/W per leg. Operating temperatures range from -55°C to +150°C.

Feature Summary

• Ultrafast recovery time for high efficiency
• Low forward voltage drop reducing power loss
• Planar FRED wafer construction
• UL certified plastic package with 94V-0 flammability rating

Applications

• High frequency switching power supplies
• Free wheeling diodes in DC-DC converters
• Inverter circuits requiring fast recovery characteristics

Procurement Notes

Verify the specific package variant required, as the datasheet distinguishes between the standard TO-220AB (MUR2040CT) and the insulated ITO-220AB (MUR2040FCT). Confirm that the thermal management design accounts for the specified junction-to-case thermal resistance of 2.0 °C/W. Ensure soldering procedures adhere to the maximum lead temperature limit of 260°C for 10 seconds to prevent component damage.

Selection Notes

Select this component when applications demand low reverse recovery charge and high switching speeds. The 20 A current rating per leg makes it suitable for medium-power isolated topologies. Compare the thermal resistance against alternative packages if heatsinking constraints are tight. Verify that the 400 V reverse voltage rating provides sufficient margin for the circuit's peak inverse voltage conditions.

Part Context

Good-Ark Semiconductor produces the MUR series of ultrafast recovery rectifiers designed for high-efficiency power conversion. The MUR2040CT belongs to this family, offering a balance of high current handling and rapid switching performance. It is commonly used in industrial and consumer electronics where minimizing switching losses is critical for overall system efficiency.

Replacement Considerations

The MUR2040FCT serves as an electrically equivalent alternative with an insulated tab for simplified mounting on heatsinks without additional insulators. Other manufacturers' parts with matching 20 A, 400 V, and <35 ns recovery specifications may be compatible if pinout and thermal characteristics align.

FAQ

What is the maximum reverse recovery time for the MUR2040CT?

The maximum reverse recovery time (Trr) is 35 ns, measured under conditions of IF=0.5A, IR=1.0A, and Irec=0.25A.

How does the thermal resistance differ between the CT and FCT variants?

The MUR2040CT has a typical junction-to-case thermal resistance of 2.0 °C/W per leg, while the MUR2040FCT has a higher value of 4.0 °C/W per leg due to its insulated package design.

Is the MUR2040CT UL certified?

Yes, the plastic package housing the MUR2040CT is UL certified and meets the 94V-0 flammability classification.