Diodes Incorporated SDT8A120P5-13

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 and 300 µA max reverse leakage at 120 V/25°C. It serves as a high-efficiency freewheel or output rectifier in DC-DC converters and AC-DC adapters operating up to +150°C junction temperature.

For engineers reviewing the SDT8A120P5 datasheet, SDT8A120P5 pinout, SDT8A120P5 application, or SDT8A120P5 equivalent, key selection criteria include thermal resistance (18 °C/W with heatsink), soft fast switching behavior, low VF stability across temperature, and RoHS-compliant green packaging for high-reliability power conversion designs.

Technical Context

This Schottky rectifier uses trench MOS structure to achieve lower forward voltage and superior high-temperature IR stability versus planar Schottkys. Its 120 V VRRM rating supports 48 V and 60 V bus applications with margin, while the 150 A IFSM surge rating enables robust handling of transient inrush currents in switched-mode supplies.

The PowerDI5 package delivers 18 °C/W RθJA with an aluminum heatsink-critical for maintaining TJ ≤ 150°C under sustained 8 A conduction-and features matte tin-annealed copper leads compatible with standard reflow profiles per MIL-STD-202.

Key Specifications

Pinout & Package

PowerDI5 is a surface-mount, 2-terminal thermally enhanced plastic package with exposed cathode pad. Dimensions: 3.966 mm × 6.51 mm × 1.10 mm (L × W × A); weight: 0.093 g. UL 94V-0 rated molding compound; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-8EWH12FN-M3/45 and SB8M120, SDT8A120P5 offers the lowest profile (1.1 mm height), best high-temperature VF stability (0.71 V @ 8 A/125°C), and smallest thermal resistance (18 °C/W) in its class-making it optimal for space-constrained, high-efficiency, thermally aggressive applications.

Availability

SDT8A120P5 is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and industrial motor drives requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The SDT8A120P5 belongs to Diodes' Power Discrete product line, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding applications such as computing, industrial, and consumer power supplies.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The SDT8A120P5 has a specified operating junction temperature range of –55°C to +150°C. For continuous conduction at 8 A, thermal design must ensure TJ does not exceed +150°C-achievable with the 18 °C/W RθJA heatsink configuration or appropriate PCB copper area per the recommended pad layout.

Is the SDT8A120P5 suitable for synchronous rectification replacement?

No-it is a passive Schottky rectifier and cannot replace active synchronous rectifiers (e.g., MOSFETs with gate drivers). However, it serves as a high-efficiency alternative to standard PN diodes in non-synchronous topologies where simplicity, cost, and reliability outweigh marginal efficiency gains from synchronous control.

Does the PowerDI5 package require special soldering profiles?

No special profile is required. The device uses matte tin-annealed copper leads and complies with J-STD-020 moisture sensitivity level 1. Standard lead-free reflow profiles (peak 260°C, 30 sec max) are fully supported; no pre-bake is needed due to MSL1 classification.

How does reverse leakage behave at elevated temperatures?

IR increases predictably with temperature: 300 µA max at 25°C, 3.1 mA at 125°C, and 17 mA at 125°C under 120 V reverse bias. This controlled rise ensures stable blocking performance in high-ambient environments without thermal runaway-validated in Figure 3 of DS39027 Rev. 3-2.