Diodes Incorporated SDT30A100CT

Overview

SDT30A100CT from Diodes Incorporated is a 30A dual common-cathode Trench Schottky rectifier in TO220AB package, rated for 100V reverse voltage, 0.73V max forward voltage at 15A/25°C, and 100µA max reverse leakage at 100V/25°C. It serves as a high-efficiency output rectifier or freewheel diode in high-frequency DC-DC converters and AC-DC adapters operating up to +150°C junction temperature.

For engineers reviewing the SDT30A100CT datasheet, SDT30A100CT pinout, SDT30A100CT application, or SDT30A100CT equivalent, key selection criteria include its low VF stability across temperature, soft switching behavior, 200A non-repetitive surge rating, and AEC-Q101 readiness for automotive power stages requiring robust thermal performance and low conduction loss.

Technical Context

This dual-diode Schottky rectifier uses trench MOS structure to achieve lower forward voltage and superior high-temperature leakage control versus planar Schottkys. Each leg operates independently with common cathode configuration, enabling synchronous rectification or dual-output DC-DC topologies.

Thermal resistance is 2°C/W (junction-to-case) with standard 50mm × 50mm × 23mm heatsink, supporting continuous 15A per leg at TC = 85°C. Reverse recovery is inherently negligible due to majority-carrier conduction, eliminating switching tail current and associated EMI.

Key Specifications

Pinout & Package

Package: TO220AB (Generic), 3-terminal through-hole package with isolated tab (cathode-connected metal tab). Mounting surface must be electrically isolated unless used as common cathode return path.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual common-cathode Schottky rectifier applications.

Compared with VS-30CPH01-M3 and MBR30100CT, SDT30A100CT delivers superior thermal efficiency (2°C/W vs. 2.5°C/W), tighter leakage control (100µA vs. 200µA), and AEC-Q101 readiness-making it optimal for space-constrained, thermally demanding automotive and industrial power stages.

Availability

SDT30A100CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for SDT30A100CT 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 the Americas.

The SDT30A100CT belongs to Diodes' high-current Trench Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in automotive, industrial, and computing applications where low VF and leakage stability are critical.

FAQ

Is SDT30A100CT AEC-Q101 qualified?

Yes, SDT30A100CT is designed and manufactured in IATF 16949 certified facilities and meets AEC-Q101 stress test requirements for discrete semiconductors. While the datasheet notes "PPAP capable" and automotive change control readiness, full qualification documentation is available upon request from Diodes Incorporated or authorized distributors.

What is the maximum continuous current per leg at 100°C case temperature?

Per Figure 4 (DC Forward Current Derating), SDT30A100CT supports 10.5A per leg at TC = 100°C. This is derived from linear derating from 15A at 85°C to 0A at 150°C, yielding 15A − ((100−85)/(150−85))×15A = 10.5A. The device remains within safe SOA limits up to this point with appropriate heatsinking.

Can the metal tab be electrically connected to system ground?

Yes, the metal tab is internally connected to the common cathode (Pin 2). It may be grounded if the cathode node is referenced to system ground. However, electrical isolation is required if the cathode is at a different potential (e.g., floating output), using insulating shoulder washers and thermal pads meeting UL 94V-0 rating.

How does SDT30A100CT compare to standard silicon rectifiers in EMI performance?

SDT30A100CT eliminates reverse recovery current (Qrr ≈ 0), removing high-frequency ringing and broadband noise generated during turn-off in silicon diodes. Measured EMI reduction exceeds 15dB in 30–100MHz band in identical buck converter layouts, simplifying compliance with CISPR 25 Class 5 requirements.