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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics FERD20S100SH

Name: FERD20S100SH
Brand: STMicroelectronics
SKU: FERD20S100SH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FERD20S100SH

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: FERD20S100SH.pdf

Description:: DIODE FERD 100V 20A TO251

Quantity:: RFQ Add To RFQ list

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Inventory:9,913

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Product details

Overview

FERD20S100SH from STMicroelectronics is a 100 V field-effect rectifier diode in IPAK package, optimized for high-efficiency confined-space power conversion. It delivers 20 A average forward current, 0.415 V max forward voltage at 20 A/125 °C, 110 µA max reverse leakage at 100 V/25 °C, and 175 °C max junction temperature-enabling replacement of Schottky diodes in AC-DC adapters and server VRMs.

For engineers reviewing the FERD20S100SH datasheet, FERD20S100SH pinout, FERD20S100SH application, or FERD20S100SH equivalent, key selection criteria include thermal runaway mitigation via low VF/IR temperature dependency, conduction loss modeling (P = 0.45×IF(AV) + 0.021×IF²(RMS)), and ECOPACK®2-compliant packaging for industrial-grade reliability.

Technical Context

This device uses ST's proprietary field-effect rectifier process to decouple forward voltage (VF) and reverse leakage (IR) temperature dependencies-reducing thermal runaway risk versus conventional Schottky diodes. Its VF remains stable across 25–125 °C and IR stays below 12 mA at 125 °C/70 V, enabling robust operation without forced cooling.

Designed for high-frequency switching topologies, it supports fast recovery with low junction capacitance (typ. <1000 pF at 0 V), minimal stored charge, and a 1.3 °C/W junction-to-case thermal resistance-critical for thermally constrained DPAK/IPAK-mounted designs in compact power supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
IF(AV)	20 A - continuous DC output capability at TC = 150 °C, suitable for 30–60 W adapter primary-side rectification
VRRM	100 V - peak repetitive reverse blocking voltage, sufficient for universal-input (90–264 VAC) flyback clamp circuits
VF(max)	0.415 V at IF = 20 A, Tj = 125 °C - enables <1.5 W conduction loss at full load, reducing heatsink requirements
IR(max)	110 µA at VR = 100 V, Tj = 25 °C - ensures low standby power in energy-efficient designs meeting Level VI standards
Tj(max)	175 °C - extends safe operating area beyond standard 150 °C Schottky limits, supporting derated high-temp environments
Rth(j-c)	1.3 °C/W - allows direct mounting to PCB copper pour or small heatsinks, eliminating need for thermal interface material

Pinout & Package

IPAK package (TO-251AA): single-source, three-terminal surface-mount outline with isolated tab (cathode-connected metal pad). Thermal path optimized via exposed cathode pad soldered to large copper area.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Input current entry point	Connected to transformer secondary or switch node; rated for 220 A non-repetitive surge (TO-220AB reference)
Cathode (Tab)	Output current exit / thermal path	Electrically and thermally connected terminal; requires minimum 90 cm² copper area for Rth(j-a) ≤ 40 °C/W
Source (Lead 2)	Internal field-effect control node	Not externally accessible; integrated gate structure enables VF/IR trade-off optimization without external bias

Key Features

Feature	Design Value
Field-effect rectifier architecture	Proprietary ST process achieving 0.415 V VF at 20 A/125 °C while holding IR <12 mA at 125 °C/70 V
Thermal runaway mitigation	Negligible VF increase and controlled IR rise over temperature eliminates positive feedback loop in unregulated thermal environments
ECOPACK®2 compliance	Halogen-free, RoHS-compliant epoxy meets UL 94 V0; qualified for industrial and medical power supply use
High-frequency suitability	Low junction capacitance (<1000 pF) and absence of minority-carrier storage enable clean turn-off in >100 kHz SMPS

Applications

Server VRM Output Rectification

USB-C PD Adapter Primary Side

Use Scenario: 12 V/20 A synchronous rectification stage in server point-of-load converters with tight thermal envelopes.

IC Role / Device Role / Timing Role: Field-effect rectifier replacing Schottky diode to reduce conduction loss and eliminate thermal runaway risk under transient load steps.

Use Value: Enables 0.8 °C/W lower thermal resistance vs. comparable Schottky, allowing 15% higher power density without fan cooling.

Use Scenario: Universal-input (90–264 VAC) flyback converter delivering 20 V/3 A for USB-C Power Delivery.

IC Role / Device Role / Timing Role: High-voltage output rectifier handling 100 V reverse stress during MOSFET off-time with minimal leakage-induced standby loss.

Use Value: 110 µA IR at 25 °C reduces no-load input power by 12 mW versus 500 µA Schottky alternatives, aiding Level VI compliance.

Industrial PLC Power Supply

LED Driver Secondary Rectification

Use Scenario: 24 V/15 A auxiliary rail in programmable logic controller power modules operating continuously at 70 °C ambient.

IC Role / Device Role / Timing Role: Primary rectifier sustaining 20 A average current with 175 °C Tj rating and stable VF across temperature.

Use Value: Eliminates derating required for standard Schottkys, maintaining full output current up to 75 °C case temperature.

Use Scenario: Constant-current LED driver with 48 V output, requiring low-loss, high-reliability rectification in enclosed luminaires.

IC Role / Device Role / Timing Role: Secondary-side freewheeling diode conducting high ripple current with minimal forward drop-induced heating.

Use Value: 0.415 V VF at 20 A cuts conduction loss by 35% vs. 0.65 V Schottky, extending LED lifetime by reducing thermal stress on driver PCB.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2010DI	100 V, 20 A ultrafast recovery diode; VF = 0.95 V @ 20 A, IR = 10 µA @ 100 V	Higher VF increases conduction loss; better EMI performance due to soft recovery	Select when EMI filtering priority outweighs efficiency; avoid in thermally constrained layouts
Vishay VS-20EWH10FN-M3	100 V, 20 A epitaxial Schottky; VF = 0.52 V @ 20 A/125 °C, IR = 1.2 mA @ 100 V/125 °C	Higher IR causes thermal runaway risk above 85 °C ambient; no Tj > 150 °C rating	Acceptable only with active cooling and IR monitoring; not recommended for sealed enclosures

Compared with STTH2010DI and VS-20EWH10FN-M3, FERD20S100SH uniquely balances low VF, ultra-low IR, and 175 °C operation-making it the sole choice for uncooled, high-density, high-reliability rectification where thermal margin is critical.

Availability

FERD20S100SH is available at Aetrix Electronics and suitable for server VRMs, USB-C PD adapters, industrial PLC power supplies, and LED driver secondary rectification requiring stable component supply and long-term lifecycle support.

Supply support for FERD20S100SH 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.

FERD20S100SH belongs to ST's field-effect rectifier product line, engineered specifically to replace Schottky diodes in high-efficiency, thermally constrained AC-DC and DC-DC power conversion systems.

FAQ

What is the maximum allowable case temperature for continuous 20 A operation?

The device is rated for 20 A average forward current at TC = 150 °C per Table 2. Operation at 20 A requires thermal design ensuring case temperature does not exceed 150 °C-achievable with ≥90 cm² copper area on FR4 board per Figure 7. Exceeding this limit risks exceeding 175 °C junction temperature.

Can FERD20S100SH be used as a direct replacement for Schottky diodes in existing designs?

Yes, but thermal and electrical validation is required. Its lower VF reduces conduction loss, yet its field-effect structure exhibits different capacitance and dynamic behavior. Layout must accommodate the IPAK cathode tab's thermal pad, and snubber networks may need adjustment due to faster switching transitions.

Does FERD20S100SH require a gate drive signal or external bias circuit?

No. It is a two-terminal passive rectifier with an integrated field-effect structure-no gate connection or external bias is needed. The "field-effect" refers to internal carrier modulation, not an externally controllable terminal. Pin 2 (source) is not brought out; only anode and cathode are electrically accessible.

What is the recommended torque for mounting the IPAK package to a heatsink?

IPAK has no mechanical mounting screw; it relies on soldered thermal pad attachment. Torque specifications (0.55 N·m) apply only to TO-220AB variants. For IPAK, ensure full wetting of the cathode pad with solder paste and reflow profile matching IPC-J-STD-020 for MSL3 components.

FERD20S100SH Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Obsolete

Technology:: FERD (Field Effect Rectifier Diode)

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 20A

Voltage - Forward (Vf) (Max) @ If:: 780 mV @ 10 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251 (IPAK)

Operating Temperature - Junction:: 175°C (Max)

FERD20S100SH FAQ

1.How can I place an order for FERD20S100SH through Aetrix?

Please submit a Request for Quotation (RFQ) for FERD20S100SH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FERD20S100SH reliable?

The price and inventory of FERD20S100SH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD20S100SH is usually 5 days.

3.What payment methods are accepted for FERD20S100SH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD20S100SH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FERD20S100SH?

FERD20S100SH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FERD20S100SH order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FERD20S100SH?

For technical support, including FERD20S100SH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD20S100SH requirements.

6.How does Aetrix verify that FERD20S100SH is sourced from the original manufacturer or authorized distributors?

All FERD20S100SH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FERD20S100SH meets industry standards.

7.What is the process for return or replacement of FERD20S100SH?

All FERD20S100SH units undergo pre-shipment inspection (PSI). If there is an issue with FERD20S100SH, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FERD20S100SH part is unused and in its original packaging.

Return procedure for FERD20S100SH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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