Diodes Incorporated G40H100CTFW

Overview

G40H100CTFW from Diodes Incorporated is a Trench Schottky rectifier optimized for high-frequency power conversion, featuring 100 V reverse voltage rating, 40 A average forward current at TC = 30°C, and low forward voltage drop (0.65 V typ. @ 20 A, 25°C). It is AEC-Q101 qualified for automotive-grade reliability and used in on-board DC-DC converters where low switching loss and thermal robustness are critical.

For engineers reviewing the G40H100CTFW datasheet, G40H100CTFW pinout, G40H100CTFW application, or G40H100CTFW equivalent, key selection criteria include junction temperature range (–55°C to +175°C), thermal resistance (RthJC = 3°C/W), leakage current (10 mA max @ 125°C), and TO-220ABFP package compatibility with standard heatsink mounting.

Technical Context

This device employs trench-based Schottky architecture to minimize forward voltage while maintaining controlled reverse leakage-achieving 0.65 V typ. VF at 20 A/25°C and 0.79 V at 125°C. Its 1370 pF junction capacitance (measured at 1 MHz, 4 V) supports operation in high-frequency switch-mode topologies up to several hundred kHz.

The ITO-220(S)AB package integrates a copper leadframe and green molding compound (UL 94V-0), enabling direct case-to-heatsink thermal conduction. With RthJC = 3°C/W and RthJL = 5°C/W, it sustains 40 A average current only when mounted on specified aluminum heatsink configurations per JESD-51 test conditions.

Key Specifications

Pinout & Package

Package: ITO-220(S)AB - Industry-standard insulated TO-220 variant with internal isolation between collector (case) and terminals; thermally enhanced for PCB-mount heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-40CPH01-M3 and MBR40100CT, G40H100CTFW offers superior thermal performance (3°C/W), AEC-Q101 qualification, and insulated packaging-making it optimal for space-constrained, high-reliability automotive and industrial DC-DC designs where junction temperature control and isolation integrity are critical.

Availability

G40H100CTFW is available at Aetrix Electronics and suitable for automotive on-board chargers, high-frequency AC-DC adapters, and industrial DC-DC converters requiring stable component supply and long-term lifecycle assurance.

Supply support for G40H100CTFW 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.

G40H100CTFW belongs to Diodes' high-efficiency Trench Schottky rectifier product line, engineered specifically for automotive and industrial power conversion systems demanding low VF, high TJ capability, and AEC-Q101 compliance.

FAQ

Is G40H100CTFW pin-compatible with standard TO-220AB rectifiers?

No-G40H100CTFW uses the ITO-220(S)AB package, which features internal electrical isolation between the cathode (Pin 2) and the metal tab (Pin 3). Standard TO-220AB devices tie Pin 2 directly to the tab. Mounting without an insulating pad on a grounded heatsink will cause short-circuit failure.

What is the maximum allowable case temperature for continuous 40 A operation?

The datasheet specifies 40 A average forward current only at TC = 30°C. Derating begins immediately above that point: at TC = 100°C, maximum I(AV) drops to ~18 A. Full 40 A operation requires active cooling to maintain case temperature ≤30°C per the forward current derating curve (Fig.1).

Does G40H100CTFW support bidirectional current flow?

No-it is a unidirectional Schottky rectifier. Current flows only from anode (Pin 1) to cathode (Pin 2). Reverse conduction is blocked up to 100 V (VRRM), and attempting reverse bias beyond that risks permanent junction damage due to avalanche breakdown.

Can G40H100CTFW replace silicon PN rectifiers in existing 100 V designs?

Yes-with caveats: its lower VF improves efficiency, but leakage current is significantly higher (10 mA max @ 125°C vs. <100 µA for Si). Designs with high-impedance hold-up circuits or sensitive standby monitoring may require layout or control-loop adjustments to accommodate increased reverse leakage.