Diodes Incorporated SDT40A100CTFP

Overview

SDT40A100CTFP from Diodes Incorporated is a 40A dual common-cathode Trench Schottky rectifier in ITO-220AB package, rated for 100V reverse voltage per leg, with max 0.72V forward voltage at 20A/25°C and 120µA reverse leakage at 100V/25°C - optimized for high-efficiency DC-DC converters and AC-DC adapters.

For engineers reviewing the SDT40A100CTFP datasheet, SDT40A100CTFP pinout, SDT40A100CTFP application, or SDT40A100CTFP equivalent, key selection criteria include thermal resistance (4°C/W junction-to-case), soft fast switching behavior, high-temperature leakage stability up to 150°C, and RoHS-compliant lead-free construction with halogen/antimony-free "Green" qualification.

Technical Context

This dual-leg Schottky rectifier uses trench MOS structure to achieve low VF and minimal reverse recovery charge - critical for reducing conduction and switching losses in high-frequency power supplies. Its common-cathode configuration enables synchronous rectification or dual-output DC-DC topologies without external parallel diodes.

Thermal performance is defined by RθJC = 4°C/W (ITO-220AB), requiring heatsink mounting for sustained 20A/leg operation. Leakage current remains stable across temperature: 120µA at 25°C and only 25µA at 125°C under 100V bias - enabling reliable operation in automotive under-hood environments.

Key Specifications

Pinout & Package

ITO-220AB package features electrically isolated metal tab (cathode-connected), with two anode terminals (A1, A2) and one common cathode terminal (K). Mounting hole allows secure thermal interface to heatsink while maintaining electrical isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-40CPH01-M3 and MBR40100CT, SDT40A100CTFP delivers best-in-class VF/IR tradeoff in an isolated-tab package - making it optimal for thermally constrained, automotive-qualified, or EMI-sensitive power stages where layout simplicity and reliability are prioritized over marginal VF reduction.

Availability

SDT40A100CTFP is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and automotive power modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for SDT40A100CTFP 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.

This device belongs to Diodes' Trench Schottky Rectifier product line - engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications demanding low VF, stable IR, and robust thermal performance.

FAQ

What is the difference between SDT40A100CT and SDT40A100CTFP?

SDT40A100CT uses generic TO-220AB with electrically connected tab (non-isolated), while SDT40A100CTFP uses ITO-220AB with electrically isolated metal tab - enabling direct heatsink mounting without insulation hardware. Both share identical electrical specs and thermal resistance of 4°C/W, but ITO-220AB improves assembly reliability and reduces thermal interface resistance.

Can SDT40A100CTFP replace a single 40A Schottky in a center-tap transformer design?

No - SDT40A100CTFP is a dual common-cathode device (2×20A legs), not a single 40A anode. It replaces two discrete 20A Schottkys in full-wave bridge or dual-output configurations. For center-tap rectification, it functions as two independent anodes feeding one cathode - matching standard center-tap transformer secondary winding topology.

Is SDT40A100CTFP qualified to AEC-Q101?

Yes - Diodes specifies this part as suitable for automotive applications requiring AEC-Q101 qualification, PPAP capability, and manufacturing in IATF 16949-certified facilities. The datasheet explicitly states eligibility for automotive change control, and Diodes' quality portal confirms AEC-Q101 stress testing compliance for this family.

What is the maximum recommended case temperature for continuous 20A/leg operation?

Per Figure 4 (DC Forward Current Derating), the absolute maximum case temperature for 20A/leg is 100°C. At TC = 100°C, the device delivers full rated current; above that, derating begins linearly to zero at 150°C. Sustained operation above 100°C requires forced airflow or oversized heatsink to maintain TC ≤ 100°C.