NTSB30120CTT4G

Overview

The NTSB30120CTT4G is a dual common-cathode Schottky rectifier manufactured by onsemi. It features a 120V maximum repetitive peak reverse voltage and a 30A average forward current rating per section. The device utilizes a trench Schottky barrier technology to achieve low forward voltage drop while maintaining stable switching characteristics across a wide temperature range. It is housed in a TO-263 (D2PAK) surface-mount package with two leads and a tab, designed for efficient thermal dissipation in high-power applications.

Feature Summary

• Low forward voltage drop achieved through trench Schottky barrier technology
• Stable switching characteristics over a wide operating temperature range
• Common-cathode configuration for simplified circuit design

Applications

• Output rectification in switch-mode power supplies
• Power adapters for laptops and portable devices
• ATX computer power supplies
• Flat panel display power circuits

Procurement Notes

Verify the specific suffix T4G against official onsemi documentation to confirm tape-and-reel packaging and lead-free compliance. Ensure the part number matches the 120V rating variant, as similar models exist with different voltage ratings. Cross-reference the D2PAK package outline with the manufacturer's mechanical drawings to guarantee footprint compatibility during procurement.

Selection Notes

Select this component when designing power stages requiring low conduction losses and high efficiency at moderate voltages. The common-cathode arrangement reduces component count compared to discrete single diodes. Consider the thermal resistance of the TO-263 package and ensure adequate PCB copper area for heat sinking to maintain junction temperatures within safe operating limits under full load conditions.

Part Context

This device belongs to onsemi's NTST series of trench Schottky rectifiers. It represents an evolution from planar Schottky technologies, offering improved performance metrics such as reduced leakage current and lower forward voltage. The series is engineered specifically for high-frequency switching applications where energy efficiency and thermal management are critical design constraints.

Replacement Considerations

Direct replacements must match the 120V rating, 30A current capacity, and common-cathode topology. Verify that alternative parts utilize compatible trench or Schottky technology to maintain equivalent forward voltage and reverse leakage characteristics. Package pinout compatibility with the TO-263 form factor is essential for board-level substitution without redesign.