Diodes Incorporated SDT20100CTB-13

Overview

SDT20100CTB-13 from Diodes Incorporated is a 20A dual-leg Trench Schottky rectifier in TO263AB package, rated for 100V peak reverse voltage, with max 0.71V forward voltage at 10A/25°C and 80µA reverse leakage at 100V/25°C; used as freewheel or output rectifier in high-efficiency DC-DC converters.

For engineers reviewing the SDT20100CTB-13 datasheet, SDT20100CTB-13 pinout, SDT20100CTB-13 application, or SDT20100CTB-13 equivalent, key selection criteria include thermal resistance (2°C/W), high-temperature leakage stability (20mA at 100V/125°C), soft switching behavior, and AEC-Q101 readiness for automotive power stages.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent 10A legs sharing one cathode terminal, enabling synchronous or interleaved rectification topologies. Its trench MOS structure delivers low VF and superior IR stability up to +150°C junction temperature.

Designed for high-frequency switching applications, it exhibits soft reverse recovery (no stored charge), minimal junction capacitance (≈400pF at 4V), and operates within -55°C to +150°C ambient range with derated current above +25°C per Figure 4.

Key Specifications

Pinout & Package

Package: TO263AB (D²PAK), surface-mount, single-ended heat sinkable plastic package with exposed copper drain pad (cathode) and three terminals: Anode 1, Anode 2, Cathode (common).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS210H-13-F and MBR20100CTG, SDT20100CTB-13 delivers superior thermal performance (2°C/W), lower VF, and integrated dual-leg topology - making it optimal for high-density, high-reliability surface-mount power conversion where efficiency and junction temperature control are critical.

Availability

SDT20100CTB-13 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, AC-DC adapter secondary side design, and automotive body control module (BCM) auxiliary supplies requiring stable component supply and AEC-Q101 traceability.

Supply support for SDT20100CTB-13 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 SDT20100CTB-13 belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in automotive, industrial, and computing applications where low VF and stable IR are essential.

FAQ

What is the maximum junction temperature and how is it achieved?

The SDT20100CTB-13 has a maximum junction temperature of +150°C, validated per its thermal characteristics table and derating curve (Figure 4). This rating is achieved using the specified mounting condition: device soldered to a 2″×2″ aluminum board with a 50mm×50mm×23mm heatsink, yielding RθJC = 2°C/W. Ambient temperature must be limited accordingly to maintain TJ ≤ 150°C under full load.

Is SDT20100CTB-13 qualified for automotive use?

Yes - SDT20100CTB-13 is designed and manufactured in IATF 16949-certified facilities and supports AEC-Q101 qualification upon request with PPAP documentation. While the base part is not pre-qualified, Diodes provides change-controlled automotive-grade variants meeting stress test requirements for temperature cycling, HTRB, and ESD per AEC-Q101 Rev H.

How does the dual common-cathode configuration affect PCB layout?

The dual common-cathode configuration reduces required copper area by consolidating the cathode return path into a single large thermal pad (Pin 3/Tab). Layout must allocate ≥250 mm² of 2-oz copper connected directly to the tab, with thermal vias to inner layers. Anode 1 and Anode 2 require separate traces routed to respective switching nodes, minimizing loop inductance for EMI control.

What is the typical junction capacitance and why does it matter?

Typical junction capacitance is 400 pF at 4V reverse bias (Figure 5). This value impacts high-frequency switching behavior: lower Cj reduces capacitive turn-on loss and displacement current during hard-switching transitions. In resonant topologies, it influences tank circuit tuning and must be included in snubberless design calculations.