STMicroelectronics FERD60U45CT

Overview

FERD60U45CT from STMicroelectronics is a dual-field-effect rectifier in TO-220AB package, designed for high-frequency switching power supplies and automotive auxiliary systems. It delivers 2 × 30 A average forward current per diode, 45 V repetitive peak reverse voltage, and typ. 0.345 V forward voltage drop at 125 °C/15 A - enabling low conduction loss in compact 48 V DC-DC converters.

For engineers reviewing the FERD60U45CT datasheet, FERD60U45CT pinout, FERD60U45CT application, or FERD60U45CT equivalent, key selection criteria include thermal coupling between dual diodes, junction-to-case thermal resistance (0.9 °C/W total), stable leakage (<100 mA at 125 °C/VRRM), and TO-220AB mechanical mounting torque (0.4–0.6 N·m).

Technical Context

This dual common-cathode rectifier uses ST's proprietary field-effect process to minimize VF/IR trade-off across temperature. Each diode operates independently with shared thermal path through the common case, requiring coupled thermal modeling using Rth(j-c) = 1.4 °C/W per diode and Rth(c) = 0.4 °C/W coupling term.

Conduction loss is calculated via P = 0.32 × IF(AV) + 0.0063 × IF²(RMS), validated up to 60 A RMS per device. Reverse leakage remains stable under 45 V VR across -65 to +175 °C storage range, with junction temperature limited to 175 °C to prevent thermal runaway on isolated heatsinks.

Key Specifications

Pinout & Package

Package: TO-220AB, epoxy-molded, UL94 V0 rated, with metal tab electrically connected to cathode (K). Mounting torque: 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH60R04DJF and MBR6045CT, FERD60U45CT uniquely balances low VF at high temperature with controlled leakage and integrated thermal coupling - making it optimal for thermally constrained dual-rail SMPS where both efficiency and reliability across -40 to +125 °C are required.

Availability

FERD60U45CT is available at Aetrix Electronics and suitable for automotive HVAC power supplies, server PSU secondary side rectification, and industrial PLC I/O power systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for FERD60U45CT 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

FERD60U45CT belongs to ST's Field Effect Rectifier (FER) product line, engineered specifically to replace Schottky diodes in high-frequency, high-temperature power conversion where VF stability and leakage control are critical.

FAQ

Is FERD60U45CT pin-compatible with standard TO-220AB dual diodes like MBR6045CT?

Yes - FERD60U45CT uses identical TO-220AB mechanical footprint and pinout (A1–K–A2), with K as common cathode tab. However, its lower VF and higher IR require updated thermal design; heatsink sizing must account for 0.9 °C/W total Rth(j-c), not the 1.2–1.5 °C/W typical of Schottky equivalents.

What is the maximum recommended PCB copper area for thermal relief when mounting FERD60U45CT?

For optimal thermal performance, ST recommends ≥ 10 cm² of 2-oz copper connected directly to the K tab via multiple thermal vias (≥8 × 0.3 mm diameter). This achieves ~25 °C/W Rth(j-a) in still air - sufficient for 60 A RMS operation at Tc ≤ 135 °C with forced airflow.

Does FERD60U45CT support synchronous rectification drive signals?

No - FERD60U45CT is a passive rectifier with no gate or control terminals. It functions as a unidirectional conduction device only. For synchronous rectification, discrete MOSFETs or dedicated SR controllers (e.g., STSR3) must be used alongside this part as a reference diode.

Can FERD60U45CT be used in parallel with another unit for higher current?

Not recommended - mismatched VF between units causes current imbalance. ST specifies ±5% VF tolerance at 15 A/125 °C, leading to >30% current skew at full load. For >60 A, use a single higher-rated device (e.g., FERD80U45CT) or redesign with interleaved phases.