Diodes Incorporated SDT8A120P5-13D

Overview

SDT8A120P5 from Diodes Incorporated is a 120 V, 8 A trench Schottky barrier rectifier in PowerDI5 package, featuring 0.84 V max forward voltage at 8 A/25°C, 300 µA max reverse leakage at 120 V/25°C, and +150°C junction rating-used as freewheel or output rectifier in high-efficiency DC-DC converters.

For engineers reviewing the SDT8A120P5 datasheet, SDT8A120P5 pinout, SDT8A120P5 application, or SDT8A120P5 equivalent, key selection criteria include low VF stability across temperature, soft switching behavior for EMI control, thermal resistance under real PCB layouts, and RoHS-compliant green packaging compliance.

Technical Context

This Schottky rectifier uses trench MOS-enhanced structure to reduce forward conduction loss while maintaining low reverse recovery charge (Qrr) and soft reverse recovery waveform-critical for synchronous rectification and high-frequency flyback or buck converter topologies.

Its 18 °C/W typical RθJA on 50 mm × 50 mm × 23 mm aluminum heatsink enables 8 A continuous operation up to +125°C ambient, while the 88 °C/W rating on standard FR-4 (2 oz Cu) defines minimum pad layout requirements for unheatsinked designs.

Key Specifications

Pinout & Package

Package: PowerDI5 - surface-mount, thermally enhanced plastic package with exposed cathode pad; 3.966 mm × 6.51 mm footprint, 1.10 mm height, UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with VS-8EWH12FN-M3 and SB8M120, SDT8A120P5 delivers superior thermal performance in compact layouts due to its PowerDI5 package's 18 °C/W heatsink RθJA and optimized cathode pad thermal path-critical for high-density 5G base station power modules.

Availability

SDT8A120P5 is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and industrial power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for SDT8A120P5 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.

The SDT8A120P5 belongs to Diodes' trench Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion where low VF, soft switching, and thermal robustness are critical.

FAQ

What is the maximum allowable junction temperature for SDT8A120P5?

The SDT8A120P5 has a rated maximum junction temperature of +150°C, verified per JEDEC JESD22-A108. This rating applies under continuous DC or pulsed forward current conditions with proper thermal management-no derating is required below this limit, but thermal design must ensure TJ does not exceed +150°C under worst-case ambient and load conditions.

Is SDT8A120P5 suitable for use in automotive applications?

SDT8A120P5 is not AEC-Q101 qualified and lacks automotive-specific qualification testing (e.g., HTOL, TCT, ESD). While its +150°C rating and green packaging meet some automotive environmental thresholds, Diodes Incorporated does not endorse or guarantee its use in automotive safety-critical or engine-bay applications without additional customer validation.

How does the PowerDI5 package improve thermal performance over SOD-123 or SMA packages?

The PowerDI5 package features an exposed cathode pad that provides direct thermal conduction to PCB copper, achieving 18 °C/W RθJA with heatsink-over 3× better than SOD-123 (≈60 °C/W) and 2× better than SMA (≈40 °C/W). Its 3.97 mm × 6.51 mm footprint also allows larger thermal pads without increasing board area significantly.

What is the reverse recovery behavior of SDT8A120P5, and why does it matter?

As a Schottky diode, SDT8A120P5 exhibits no minority-carrier storage and therefore has negligible reverse recovery time (trr) and charge (Qrr < 20 nC). This eliminates switching losses and voltage spikes during turn-off-reducing EMI, simplifying snubber design, and improving system reliability in high-frequency (>200 kHz) converters.