STMicroelectronics FERD20H100SH

Overview

FERD20H100SH from STMicroelectronics is a 100 V, 20 A field-effect rectifier diode in IPAK package, optimized for high-efficiency confined-space applications including notebook adapters and DC/DC converters. It delivers VF(max.) = 0.415 V at 2 A/25 °C, IR(max.) = 140 µA at 100 V/25 °C, Tj(max.) = 175 °C, and Rth(j-c) = 1.0 °C/W - enabling thermal stability where Schottky replacement is required.

For engineers reviewing the FERD20H100SH datasheet, FERD20H100SH pinout, FERD20H100SH application, or FERD20H100SH equivalent, key selection criteria include low forward voltage drop under high-temperature operation, stable leakage current across reverse voltage, insulated thermal performance in IPAK, and compatibility with MPPT and LED lighting power stages.

Technical Context

This device uses ST's proprietary field-effect rectifier technology to decouple VF and IR temperature dependencies, reducing thermal runaway risk versus conventional Schottky diodes. Its 100 V VRRM rating and 20 A IF(AV) capability are validated for δ = 0.5 square-wave conduction at TC = 155 °C in IPAK.

The IPAK package provides UL 94 V0 epoxy insulation and conduction-based cooling, with mechanical dimensions tightly specified (e.g., D = 6.00–6.20 mm, E = 6.40–6.65 mm). Junction-to-case thermal resistance is fixed at 1.0 °C/W, supporting predictable thermal design in compact PCB layouts.

Key Specifications

Pinout & Package

Package: IPAK (TO-251AA), surface-mount, single-die rectifier with isolated tab (cooling via conduction), UL 94 V0 epoxy, 0.32 g weight, 75 pcs/tube.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage rectifier applications.

Compared with STTH2010D and SS210H, FERD20H100SH uniquely balances 20 A current handling, sub-0.42 V VF, and µA-level IR across temperature - making it the sole viable field-effect rectifier for thermally dense 100 V adapter and LED driver designs.

Availability

FERD20H100SH is available at Aetrix Electronics and suitable for notebook adapter power stages, LED lighting drivers, and MPPT charge controllers requiring stable component supply with guaranteed long-term sourcing.

Supply support for FERD20H100SH 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

FERD20H100SH belongs to ST's Field-Effect Rectifier (FERD) product line, engineered specifically to replace Schottky diodes in high-efficiency, high-reliability power conversion where thermal stability and low leakage are non-negotiable.

FAQ

What is the maximum allowable case temperature for continuous operation of FERD20H100SH?

The IPAK package is rated for continuous operation at TC = 155 °C, as confirmed in Table 1 of DS11526 Rev 4. This limit assumes proper copper pour area per Figure 8 and adherence to the (dPtot/dTj) < (1/Rth(j-a)) condition to prevent thermal runaway. Exceeding 155 °C requires derating per Figure 1.

Is FERD20H100SH electrically isolated between tab and cathode?

No - the metallic tab is internally connected to the cathode terminal, as verified in the IPAK mechanical drawings (Figure 9) and thermal test conditions. Isolation is not provided; the tab must be treated as an extension of the cathode for both electrical and thermal design.

Can FERD20H100SH be used as a direct replacement for standard 100 V Schottky diodes?

Yes, but only where thermal and electrical constraints align: its VF is lower than most Schottkys at low currents, and IR is dramatically lower at high temperature. However, its 1.0 °C/W Rth(j-c) demands robust PCB copper; unlike Schottkys, it cannot rely on ambient convection alone.

What is the surge current rating for FERD20H100SH in IPAK package?

The IPAK variant has IFSM = 150 A for tp = 10 ms sinusoidal pulse, as specified in Table 1. This value applies only when mounted on a PCB with ≥40 cm² of 35 µm copper per Figure 8; insufficient copper reduces effective surge capability due to higher transient thermal impedance.