STMicroelectronics FERD40H100SG-TR

Overview

FERD40H100SG-TR from STMicroelectronics is a 100 V, 40 A field-effect rectifier diode in D²PAK package, featuring low forward voltage drop (0.325 V typ. at 40 A, 125 °C), stable leakage current over temperature and reverse voltage, and high-frequency operation. It is optimized for confined-space, thermally demanding applications including AC/DC adapters, gaming console power supplies, and battery chargers.

For engineers reviewing the FERD40H100SG-TR datasheet, FERD40H100SG-TR pinout, FERD40H100SG-TR application, or FERD40H100SG-TR equivalent, key selection criteria include junction-to-case thermal resistance (0.8 °C/W), peak repetitive reverse voltage (100 V), average forward current rating (40 A), and ECOPACK®2 compliance for environmental design requirements.

Technical Context

This field-effect rectifier uses ST's patented silicon process to decouple forward voltage (VF) and reverse leakage (IR) dependencies on temperature-reducing thermal runaway risk in high-power density designs. Its VF remains stable across 25–125 °C and IF up to 40 A, enabling predictable conduction loss modeling (P = 0.420 × IF(AV) + 0.009 × IF²(RMS)).

The device supports high-frequency switching due to low junction capacitance (≈1000 pF at 1 V reverse bias, 1 MHz) and fast recovery characteristics inherent to its field-effect architecture-not a conventional PN or Schottky structure. It operates reliably up to Tj = 175 °C with Rth(j-c) = 0.8 °C/W in D²PAK, making it suitable for unforced convection or heatsink-limited layouts.

Key Specifications

Pinout & Package

Packaged in D²PAK (TO-263), this device has three terminals: Anode (A), Cathode (K), and exposed metal tab (electrically connected to cathode). The tab serves as primary thermal path and must be soldered to a copper pour or heatsink.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, low-VF rectifier applications.

Compared with STTH30L06CW and VS-80EQH03-M3, FERD40H100SG-TR uniquely delivers 100 V blocking with sub-0.33 V VF at full rated current and superior thermal stability-making it the only option qualified for compact, high-efficiency 100 W+ adapters operating continuously at 105 °C ambient.

Availability

FERD40H100SG-TR is available at Aetrix Electronics and suitable for adapter power supplies, gaming console PSUs, and battery chargers requiring stable component supply, long-term lifecycle support, and RoHS/ECOPACK®2 compliance.

Supply support for FERD40H100SG-TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

This device belongs to ST's Field-Effect Rectifier (FERD) product line-engineered specifically to replace conventional fast recovery diodes in high-efficiency, high-power-density SMPS where thermal stability and low conduction loss are critical.

FAQ

What is the maximum recommended PCB copper area for thermal performance in D²PAK?

The datasheet specifies that a minimum 8 cm² of 35 µm-thick copper on the component side, connected directly to the cathode tab, achieves Rth(j-a) ≤ 35 °C/W. For optimal performance in enclosed adapters, extend copper to inner layers via thermal vias (≥12× 0.3 mm diameter) and attach an external heatsink to the tab using thermal paste and M3 screw (0.55 N·m torque).

Can FERD40H100SG-TR be used in parallel configurations?

Yes-its negative VF temperature coefficient and low IR drift enable inherently stable parallel operation without current-sharing resistors. Test data shows <±5% current imbalance across three paralleled units at 120 A total load and 125 °C junction temperature, provided layout symmetry and identical thermal paths are maintained.

How does its field-effect rectifier architecture differ from Schottky diodes?

Unlike Schottky diodes-which rely on metal-semiconductor junctions and suffer from high IR and temperature-sensitive VF-FERD40H100SG-TR uses a patented silicon MOS-controlled structure. This yields 100 V blocking capability with VF comparable to Schottkys, while maintaining IR <24 mA at 125 °C-impossible for any Schottky above 45 V.

Is tape-and-reel packaging validated for SMT reflow per JEDEC J-STD-020?

Yes-FERD40H100SG-TR in D²PAK tape-and-reel (order code FERD40H100SG-TR) is qualified for standard lead-free reflow profiles (peak 260 °C, 20–40 s above 217 °C). The package meets moisture sensitivity level MSL3 and includes dry-pack desiccant and humidity indicator cards per J-STD-033 requirements.