NTST40H120CTG

Overview

The NTST40H120CTG is a high-speed ultra-fast recovery rectifier manufactured by onsemi. It features an N-type silicon construction with a common cathode configuration, housing two individual diodes within a single I²PAK-4 package. The device is rated for a maximum repetitive peak reverse voltage of 1200 V and supports a continuous forward current of 40 A. Key electrical parameters include a maximum DC reverse leakage current of 5 µA at 1200 V and a typical forward voltage drop of 1.35 V at 25°C. The module operates reliably across a junction temperature range from -55°C to +175°C.

Feature Summary

• High-speed ultra-fast recovery characteristics designed for efficient switching applications
• Common cathode dual-diode configuration in a robust I²PAK-4 surface-mount package
• Capable of handling high surge currents up to 250 A for non-repetitive conditions

Applications

• High-frequency AC/DC power supply circuits
• Motor drive freewheeling paths
• Uninterruptible Power Supply (UPS) systems

Procurement Notes

Verify the specific datasheet revision and ordering suffix when sourcing this component. Confirm that the package type matches the required I²PAK-4 footprint for your PCB layout. Ensure thermal management solutions are adequate for the specified power dissipation limits under your operating conditions. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component for designs requiring high-voltage blocking capabilities combined with fast recovery times. The common cathode arrangement simplifies circuit topology compared to discrete setups. Consider the thermal resistance of the I²PAK-4 package when determining heat sink requirements. Evaluate the trade-off between forward voltage drop and switching speed against alternative rectifiers in the same voltage class.

Part Context

This part belongs to onsemi's family of high-power rectifiers utilizing advanced silicon planar technology. It is engineered for industrial and consumer electronics where reliability and compact form factors are critical. The I²PAK-4 package provides superior thermal performance and mechanical stability compared to traditional through-hole alternatives, facilitating automated assembly processes.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement maintains identical voltage ratings, current capacity, and package dimensions. Verify that switching speeds and thermal characteristics meet or exceed the original specifications.