Diodes Incorporated SDT8A120P5-7D

Overview

SDT8A120P5-7D 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 temperature rating-used as freewheel or output rectifier in DC-DC converters and AC-DC adapters.

For engineers reviewing the SDT8A120P5-7D datasheet, SDT8A120P5-7D pinout, SDT8A120P5-7D application, or SDT8A120P5-7D equivalent, key selection criteria include low VF stability across temperature, soft-switching behavior for EMI reduction, thermal resistance (18 °C/W with heatsink), and RoHS-compliant green packaging for industrial power supplies.

Technical Context

This Schottky rectifier uses trench MOS structure to achieve lower forward voltage and reduced reverse recovery charge versus planar Schottkys. Its soft, fast switching minimizes voltage overshoot and ringing during turn-off in high-frequency synchronous rectification circuits.

The device operates up to +150°C junction temperature with stable IR < 17 mA at 120 V and +125°C, supported by low RθJA of 18 °C/W on aluminum heatsink-enabling compact, convection-cooled designs in space-constrained 12–48 V DC-DC outputs.

Key Specifications

Pinout & Package

Package: PowerDI5 - surface-mount, thermally enhanced plastic package with exposed copper pad for direct PCB heat transfer; 3.966 mm × 6.51 mm footprint; 0.85 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 SDT8A120P5-7D, the Vishay part trades thermal performance for legacy package compatibility, while the ON Semi part adds automotive qualification at the cost of marginally higher VF-making the Diodes device optimal for space- and efficiency-critical industrial DC-DC designs.

Availability

SDT8A120P5-7D is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and telecom power supplies requiring stable component supply, consistent thermal performance, and RoHS-compliant green packaging.

Supply support for SDT8A120P5-7D 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 solutions, signal integrity products, and precision timing devices.

The SDT8A120P5 belongs to Diodes' Power Discrete product line, engineered specifically for high-frequency, high-efficiency rectification in space-constrained industrial and computing power supplies.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The SDT8A120P5-7D has a rated maximum junction temperature of +150°C, verified per JEDEC JESD22-A104 stress testing. Continuous operation at this limit requires thermal design ensuring RθJA ≤ 18 °C/W with heatsink or ≤ 88 °C/W on standard FR-4 PCB, as specified in the datasheet's derating curve (Figure 4).

Does the PowerDI5 package require solder paste stencil adjustments versus SO-8?

Yes-the PowerDI5 exposes a large copper thermal pad (3.054 mm × 3.549 mm) that requires 50–60% aperture ratio and stepped stencil thickness (0.12 mm) to ensure void-free solder joint formation. Standard SO-8 stencils will underprint, risking thermal delamination and premature failure under thermal cycling.

How does the soft switching behavior reduce EMI in high-frequency converters?

Unlike conventional diodes, the SDT8A120P5-7D exhibits no reverse recovery charge (Qrr ≈ 0), eliminating the high di/dt current spike during turn-off. This removes the primary source of broadband EMI above 30 MHz, reducing conducted emissions by up to 12 dBµV in 300–1000 kHz converters without additional filtering.

Is the "7D" suffix indicative of tape-and-reel orientation or moisture sensitivity level?

The "7D" suffix denotes packaging: 1,500 units per 7-inch reel on 12 mm carrier tape. Moisture sensitivity is Level 1 per J-STD-020 (unlimited floor life at ≤30°C/60% RH), confirmed by the device's molded plastic case and matte tin annealed terminals-no dry-pack or baking required prior to reflow.