STMicroelectronics FERD20L60CTS

Overview

FERD20L60CTS 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 PD chargers. It delivers 20 A total average forward current (dual-diode configuration), 0.365 V typical forward voltage at 10 A/125 °C, and stable <60 mA reverse leakage at 125 °C/60 V.

For engineers reviewing the FERD20L60CTS datasheet, FERD20L60CTS pinout, FERD20L60CTS application, or FERD20L60CTS equivalent, key selection criteria include conduction loss modeling (P = 0.255×IF(AV) + 0.032×IF²(RMS)), thermal resistance (Rth(j-c) = 1.3 °C/W total), junction temperature derating, and TO-220AB mechanical mounting torque (0.55 N·m recommended).

Technical Context

This dual-diode rectifier uses ST's proprietary field-effect process to decouple forward voltage (VF) and reverse leakage (IR), achieving superior VF/IR trade-off versus conventional Schottky or fast recovery diodes. Its low 0.25–0.575 V VF range across 2–10 A and 25–125 °C enables reduced conduction losses in high-frequency switching topologies.

The device operates with a maximum junction temperature of 150 °C and features a total junction-to-case thermal resistance of 1.3 °C/W - critical for compact adapter designs where heatsink area is limited and thermal coupling between diodes must be accounted for in layout.

Key Specifications

Pinout & Package

FERD20L60CTS is housed in a TO-220AB package with three terminals: two anodes (A1, A2) and one common cathode (K). The metal tab is electrically connected to the cathode and serves as the primary thermal path. Mounting torque must be controlled to 0.55 N·m (max 0.6 N·m) to ensure reliable thermal contact without die cracking.

Key Features

Applications

Availability

FERD20L60CTS is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial AC/DC power supplies, and laptop OEM AC adapters requiring stable component supply, long-lifecycle availability, and traceable sourcing.

Supply support for FERD20L60CTS 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer applications.

FERD20L60CTS belongs to ST's Field-Effect Rectifier Diode product line, engineered specifically to replace Schottky diodes in high-efficiency, high-temperature AC/DC conversion where VF/IR optimization is critical.

FAQ

What is the thermal interface requirement for FERD20L60CTS in TO-220AB?

The metal tab (cathode K) must be mounted to a heatsink using thermal compound and tightened to 0.55 N·m torque (max 0.6 N·m). Exceeding torque risks die fracture; insufficient torque raises Rth(j-c) above 1.3 °C/W, risking Tj > 150 °C at 20 A. Flatness and surface finish of the heatsink mating surface directly impact thermal performance.

How does FERD20L60CTS differ from standard Schottky rectifiers?

Unlike Schottky diodes, FERD20L60CTS uses ST's field-effect rectifier process to eliminate the VF–IR trade-off: it achieves 0.365 V VF at 10 A/125 °C while maintaining only 60 mA IR at full 60 V reverse bias and 125 °C - a combination unattainable with conventional Schottky structures due to barrier height limitations.

Can FERD20L60CTS be used in single-diode mode?

Yes - either anode (A1 or A2) can be used independently with the common cathode (K), delivering 10 A IF(AV) per diode. The internal structure isolates the two anodes, allowing asymmetric current sharing, independent thermal monitoring, or redundancy in mission-critical systems without cross-conduction risk.

Is FERD20L60CTS RoHS and REACH compliant?

Yes - FERD20L60CTS carries ECOPACK®2 compliance, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The TO-220AB package uses lead-free terminations and halogen-free epoxy rated UL94 V0, with full material declarations available via ST's ECOPACK® portal.