STMicroelectronics FERD30H100STS

Overview

FERD30H100STS from STMicroelectronics is a 100 V field-effect rectifier diode in TO-220AB package, rated for 30 A average forward current, 0.405 V max forward voltage at 30 A/125 °C, and 130 µA max reverse leakage at 100 V/25 °C. It replaces Schottky diodes in high-efficiency, thermally constrained AC/DC and DC/DC converters.

For engineers reviewing the FERD30H100STS datasheet, FERD30H100STS pinout, FERD30H100STS application, or FERD30H100STS equivalent, key selection criteria include thermal runaway mitigation via low VF–IR temperature dependency, junction-to-case thermal resistance of 0.9 °C/W, and ECOPACK®2 compliance for industrial power supplies.

Technical Context

This device uses ST's proprietary field-effect rectifier process to decouple forward voltage (VF) and reverse leakage (IR) dependencies on temperature-reducing thermal runaway risk compared to conventional Schottky diodes. Its VF remains stable across 25–125 °C, with IR increasing only modestly under 70 V at 125 °C (4–7 mA).

Designed for confined-casing applications, it delivers high-frequency rectification with low conduction loss (P = 0.424 × IF(AV) + 0.0133 × IF²(RMS)) and supports surge currents up to 250 A (10 ms sinusoidal, TO-220AB). Junction temperature is rated to +175 °C with validated thermal impedance behavior per pulse duration.

Key Specifications

Pinout & Package

TO-220AB package with isolated tab (anode), single through-hole mounting, and screw-torque specification of 0.55 N·m (recommended). Thermal path optimized for conduction cooling via metal tab contact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH30L06D and MBR30H100CT, FERD30H100STS uniquely balances 100 V blocking, sub-0.41 V VF, and µA-level IR at room temperature-making it the only option for thermally isolated, high-density 100 V rectification without thermal runaway risk.

Availability

FERD30H100STS is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, telecom rectifier modules, and renewable energy inverters requiring stable component supply and long-term industrial lifecycle support.

Supply support for FERD30H100STS 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 analog, digital, and mixed-signal ICs for automotive, industrial, and power applications.

FERD30H100STS belongs to ST's Field-Effect Rectifier (FERD) product line-engineered specifically to replace Schottky diodes in high-efficiency, thermally constrained power conversion where VF–IR trade-off and thermal stability are critical.

FAQ

Is FERD30H100STS pin-compatible with standard TO-220AB Schottky diodes?

Yes-FERD30H100STS uses the standard TO-220AB outline with anode on the tab and cathode on lead 2. Leads 1 and 3 are NC, matching mechanical footprint and mounting hole pattern of MBR30xxCT, STTH30xx, and similar parts. No PCB redesign is required for drop-in replacement.

What is the maximum recommended heatsink interface thermal resistance for reliable operation at 30 A?

With Rth(j-c) = 0.9 °C/W and Tj(max) = 175 °C, assuming 70 °C ambient and 30 A conduction, total allowable Rth(c-a) is ≤3.5 °C/W. Therefore, heatsink-to-ambient resistance must be ≤2.6 °C/W when including thermal interface material (e.g., 0.2 °C/W for silicone pad + 0.1 °C/W bond line).

Does FERD30H100STS require gate drive or external control signals?

No-it is a two-terminal passive rectifier diode with no gate, control pin, or bias requirement. It operates solely based on forward/reverse voltage polarity and conducts automatically when anode voltage exceeds cathode by >0.35 V. No driver circuitry or timing synchronization is needed.

Can FERD30H100STS be used in parallel configurations for higher current?

Parallel operation is not recommended due to inherent VF mismatch between units-even within same batch-which causes current imbalance. ST does not specify matching tolerance. For >30 A, use a single higher-rated device (e.g., FERD40H100STS) or multi-phase architecture instead.