STMicroelectronics FERD20H60CTS

Overview

FERD20H60CTS from STMicroelectronics is a 60 V field-effect rectifier diode in TO-220AB package, optimized for high-efficiency, thermally constrained AC/DC adapters and USB-C chargers. It delivers 20 A total average forward current (dual-diode configuration), 0.39 V typical forward voltage at 2 A/25 °C, and stable 200 µA reverse leakage at 60 V/25 °C.

For engineers reviewing the FERD20H60CTS datasheet, FERD20H60CTS pinout, FERD20H60CTS application, or FERD20H60CTS equivalent, key selection criteria include conduction loss modeling (P = 0.285 × IF(AV) + 0.03 × IF²(RMS)), thermal resistance (Rth(j-c) = 1.3 °C/W per device), junction temperature limit (175 °C), and suitability for high-frequency switching topologies with low VF/IR trade-off.

Technical Context

This device employs ST's proprietary field-effect rectifier process to decouple forward conduction and reverse blocking behavior-enabling simultaneous low VF (0.34–0.585 V across 2–10 A/25–125 °C) and ultra-low IR (≤20 mA at 45 V/125 °C). Unlike conventional Schottky or fast recovery diodes, it avoids thermal runaway under high ambient conditions due to its negative temperature coefficient of VF and controlled IR drift.

It operates as a dual-diode monolithic assembly in a single TO-220AB package, with both anodes internally isolated and cathodes tied to the metal tab (common-cathode configuration). The design targets continuous conduction mode (CCM) and quasi-resonant (QR) flyback converters where junction-to-case thermal path (1.3 °C/W) and surge robustness (130 A IFSM) are critical for reliability.

Key Specifications

Pinout & Package

Package: TO-220AB (ECOPACK® compliant, epoxy UL94-V0, recommended torque 0.55 N·m). Metal tab is common cathode; leads A1 and A2 are isolated anodes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar field-effect rectifier applications.

Compared with STTH2006D and MBR2060CT, FERD20H60CTS uniquely balances low VF, ultra-low IR, and thermal stability-making it the only option capable of sustaining 20 A average current at 125 °C junction without forced cooling in space-constrained adapters.

Availability

FERD20H60CTS is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial AC/DC power supplies, and laptop AC adapters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for FERD20H60CTS 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 automotive, industrial, and consumer markets.

FERD20H60CTS belongs to ST's Field-Effect Rectifier (FERD) product line-engineered specifically to replace Schottky and fast recovery diodes in high-efficiency, thermally dense AC/DC conversion systems.

FAQ

What is the thermal interface requirement for FERD20H60CTS in TO-220AB?

The metal tab must be mounted to a heatsink using thermal compound and torqued to 0.55 N·m (max 0.6 N·m). Rth(j-c) = 1.3 °C/W assumes full tab contact area; partial coverage increases thermal resistance linearly. No insulating washer is needed-the tab is electrically the common cathode.

Can FERD20H60CTS replace a standard dual Schottky in existing designs?

Yes, with layout verification: pinout matches TO-220AB dual common-cathode packages (A1/A2/Tab), and VF improvement (0.39 V vs. ~0.75 V) reduces conduction loss by >45%. However, PCB copper area must accommodate lower thermal mass-verify junction temperature rise using the provided Rth(j-c) and power loss equation.

Is FERD20H60CTS suitable for synchronous rectification control schemes?

No-it is a passive rectifier, not a MOSFET-based synchronous device. It does not require gate drive signals. Its field-effect architecture provides self-controlled conduction without external timing, making it compatible with all flyback, LLC, and QR controllers that rely on passive secondary-side rectification.

How does leakage current behave at elevated temperature and voltage?

At 125 °C and 45 V reverse bias, IR is specified at 6–12 mA (typical 9 mA); at full VRRM (60 V), IR reaches ≤20 mA. This is 10× lower than comparable Schottkys at same conditions, preventing thermal runaway and ensuring stable no-load power consumption below 30 mW in certified adapters.