Diodes Incorporated SDT30B45VCT

Overview

SDT30B45VCT from Diodes Incorporated is a 30A dual-leg Trench Schottky rectifier with 45V peak reverse voltage, 0.55V max forward voltage at 15A/25°C, 0.5mA max reverse leakage at 25°C, and TO220AB package; used as freewheel or output rectifier in high-efficiency DC-DC converters.

For engineers reviewing the SDT30B45VCT datasheet, SDT30B45VCT pinout, SDT30B45VCT application, or SDT30B45VCT equivalent, key selection criteria include low VF stability at +125°C, 200A non-repetitive surge rating, thermal resistance of 1°C/W (junction-to-case), and AEC-Q101 readiness for automotive power stages.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent 15A legs sharing one cathode terminal, enabling synchronous or interleaved rectification topologies. Its trench MOS structure delivers lower VF than planar Schottkys while maintaining soft recovery behavior critical for EMI control.

Rated for continuous 15A per leg at +25°C (30A total device), it sustains 0.48V typical VF at 15A/25°C and only 0.55V at 15A/125°C - confirming stable conduction across automotive temperature range. Reverse leakage remains ≤0.077mA at 125°C under 45V bias.

Key Specifications

Pinout & Package

Package: TO220AB (Generic), molded plastic case rated UL 94V-0, matte tin-plated copper lead-frame, 1.85g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH045 and MBR3045CT, SDT30B45VCT delivers the lowest VF at high temperature in TO220AB, enabling smaller heatsinks and higher power density in space-constrained automotive and industrial converters.

Availability

SDT30B45VCT is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial AC-DC adapters, and server VRM power stages requiring stable component supply, AEC-Q101 traceability, and consistent thermal performance.

Supply support for SDT30B45VCT 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, serving automotive, industrial, computing, and consumer markets with high-reliability components.

This device belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in automotive and industrial applications where low VF and stable leakage are critical.

FAQ

Is SDT30B45VCT qualified to AEC-Q101?

Yes, SDT30B45VCT is manufactured in IATF 16949-certified facilities and supports AEC-Q101 qualification testing upon request. While the standard part is not pre-certified, Diodes provides PPAP documentation and change control for automotive customers requiring formal qualification.

What is the maximum continuous current per leg at +100°C ambient?

At +100°C ambient with a 50×50×23mm heatsink, SDT30B45VCT supports approximately 9A per leg continuously. This is derived from its 15A rating at +25°C, 1°C/W RθJC, and thermal derating curve in DS43329 Rev. 2–2, page 2.

Can SDT30B45VCT replace MBR3045CT in existing designs?

Yes, SDT30B45VCT is a direct TO220AB pinout replacement for MBR3045CT with identical terminal configuration. Its lower VF (0.55V vs. 0.72V at 15A/125°C) reduces conduction loss and junction temperature, improving reliability in thermally constrained layouts.

Does the cathode terminal serve as the thermal pad?

Yes, the cathode is electrically and thermally connected to the metal tab on the TO220AB package. Mounting this tab to a heatsink provides both electrical return and primary thermal path; the tab must be electrically isolated if cathode is not grounded in the system.