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

Taiwan Semiconductor Corporation SRAS820H

Name: SRAS820H
Brand: Taiwan Semiconductor Corporation
SKU: SRAS820H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SRAS820H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: SRAS820H.pdf

Description:: 8A, 20V, PLANAR SCHOTTKY

Quantity:: RFQ Add To RFQ list

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Inventory:8,952

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Product details

Overview

SRAS820H from Taiwan Semiconductor is a single-die Schottky barrier rectifier in TO-263AB (D2PAK) package, rated for 20 V repetitive peak reverse voltage (V_RRM), 8 A average forward current (I_F), and 150 A non-repetitive surge current (I_FSM). It delivers low forward voltage drop (0.55 V at 8 A, 25°C), operates up to 125°C junction temperature, and is qualified to AEC-Q101 for automotive use - ideal for reverse battery protection and DC/DC converter freewheeling paths.

For engineers reviewing the SRAS820H datasheet, SRAS820H pinout, SRAS820H application, or SRAS820H equivalent, key selection criteria include its 20 V V_RRM, 0.55 V V_F at 8 A, 3 °C/W R_θJC, AEC-Q101 qualification, and TO-263AB thermal performance - critical for high-efficiency, space-constrained automotive power designs.

Technical Context

The SRAS820H uses a planar Schottky junction structure optimized for low conduction loss and fast switching with no minority-carrier storage. Its 20 V V_RRM rating targets low-voltage DC rails where minimal forward drop and high surge robustness are essential.

Thermally, it features a low 3 °C/W junction-to-case resistance and is rated for continuous operation up to 125°C junction temperature, with storage up to 150°C. The device includes a guard ring for overvoltage protection and meets JESD201 Class 2 whisker resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum reverse blocking capability for 12–24 V automotive and industrial DC systems
I_F	8 A - Continuous forward current rating at case temperature ≤ 110°C, enabling compact heatsinking
V_F	0.55 V @ 8 A, 25°C - Low conduction loss reduces power dissipation by >30% vs. comparable 40 V Schottkys
I_FSM	150 A - Withstands 8.3 ms half-sine surges common in load dump and inductive switching events
R_θJC	3 °C/W - Enables direct PCB copper pour thermal coupling for high-power density layouts
T_J max	125°C - Rated junction temperature supports under-hood automotive environments without derating
AEC-Q101	Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD

Pinout & Package

Package: TO-263AB (D2PAK) - surface-mount, thermally enhanced outline with exposed drain pad (cathode-connected tab) and three terminals: Anode, Cathode, and Cathode (tab). Meets UL 94V-0 flammability and J-STD-002 solderability standards.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to input/source side of rectification path; requires trace width ≥ 1.5 mm for 8 A continuous
Cathode (Lead 2)	Forward current exit point	Secondary cathode connection; used for low-inductance routing in parallel configurations
Cathode Tab (Exposed Pad)	Main cathode terminal & thermal path	Electrically and thermally tied to cathode; must be soldered to ≥ 400 mm² copper pour for R_θJC = 3 °C/W

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive power modules, including temperature cycling (-40°C to +125°C), HTRB, and ESD testing
Guard ring structure	Enhances edge termination robustness, improving V_RRM stability under transient overvoltage stress
Moisture sensitivity level 1	No floor life limitation or baking required before reflow - simplifies SMT line integration
Matte tin-plated leads	Ensures reliable solder joint formation per J-STD-002, compatible with lead-free and SnPb processes
Halogen-free construction	Complies with IEC 61249-2-21, supporting RoHS and environmental compliance in end equipment

Applications

Reverse Battery Protection	DC/DC Converter Freewheeling
Use Scenario: Prevents damage to vehicle ECUs during incorrect battery connection in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional current-blocking diode placed in series with battery input rail. Use Value: 0.55 V forward drop minimizes voltage loss and heat generation at 8 A startup currents.	Use Scenario: Provides low-loss return path for inductor current during high-frequency synchronous buck converter dead time. IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier operating at 100–500 kHz switching frequencies. Use Value: Fast recovery and low V_F reduce conduction losses and improve efficiency by ≥1.2% at 5 A output.
Automotive LED Lighting Supply	Low-Voltage Inverter Output Stage
Use Scenario: Supplies regulated 12 V power to headlamp driver modules with PWM dimming. IC Role / Device Role / Timing Role: Input rectifier in offline AC-DC or DC-DC stage feeding constant-current LED drivers. Use Value: AEC-Q101 qualification ensures long-term reliability under vibration and thermal cycling in headlamp housings.	Use Scenario: Converts 24 V battery power to variable AC for small HVAC blowers or seat motor drives. IC Role / Device Role / Timing Role: Output-stage unidirectional switch in half-bridge inverter leg. Use Value: 150 A I_FSM withstands motor stall currents without failure, enabling robust short-circuit protection.

Reverse Battery Protection

DC/DC Converter Freewheeling

Use Scenario: Prevents damage to vehicle ECUs during incorrect battery connection in 12 V systems.

IC Role / Device Role / Timing Role: Unidirectional current-blocking diode placed in series with battery input rail.

Use Value: 0.55 V forward drop minimizes voltage loss and heat generation at 8 A startup currents.

Use Scenario: Provides low-loss return path for inductor current during high-frequency synchronous buck converter dead time.

IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier operating at 100–500 kHz switching frequencies.

Use Value: Fast recovery and low V_F reduce conduction losses and improve efficiency by ≥1.2% at 5 A output.

Automotive LED Lighting Supply

Low-Voltage Inverter Output Stage

Use Scenario: Supplies regulated 12 V power to headlamp driver modules with PWM dimming.

IC Role / Device Role / Timing Role: Input rectifier in offline AC-DC or DC-DC stage feeding constant-current LED drivers.

Use Value: AEC-Q101 qualification ensures long-term reliability under vibration and thermal cycling in headlamp housings.

Use Scenario: Converts 24 V battery power to variable AC for small HVAC blowers or seat motor drives.

IC Role / Device Role / Timing Role: Output-stage unidirectional switch in half-bridge inverter leg.

Use Value: 150 A I_FSM withstands motor stall currents without failure, enabling robust short-circuit protection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-8EWH02-M3	20 V V_RRM, 8 A I_F, 0.52 V V_F @ 8 A, TO-263AB, but not AEC-Q101 qualified	Lacks automotive qualification; suitable only for industrial/commercial DC/DC converters	Select when AEC-Q101 is not required and lowest possible V_F is prioritized
ON Semiconductor SB820	20 V V_RRM, 8 A I_F, 0.57 V V_F @ 8 A, TO-263AB, AEC-Q101 qualified, R_θJC = 3.5 °C/W	Slightly higher thermal resistance and forward voltage; identical automotive qualification scope	Choose when supply chain diversification is needed and 0.02 V V_F increase is acceptable

Compared with VS-8EWH02-M3 and SB820, the SRAS820H uniquely combines AEC-Q101 qualification, 0.55 V V_F, and 3 °C/W R_θJC - delivering optimal thermal margin and automotive compliance without sacrificing efficiency in 12 V power rails.

Availability

SRAS820H is available at Aetrix Electronics and suitable for automotive reverse battery protection, DC/DC converter freewheeling, and LED lighting power supplies requiring stable component supply across production lifecycles.

Supply support for SRAS820H 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The SRAS820H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability 12–24 V automotive power conversion where low V_F, surge robustness, and thermal performance are critical.

FAQ

What is the maximum junction temperature rating for SRAS820H?

The SRAS820H has a maximum junction temperature (T_J) rating of +125°C under continuous operation. This rating is validated per AEC-Q101 stress testing and allows full 8 A current capability when case temperature remains ≤110°C. Derating begins above that point, with zero current allowed at 150°C ambient per the forward current derating curve in the datasheet.

Is SRAS820H pin-compatible with other parts in the SRAS8xH family?

Yes, all SRAS8xH devices - including SRAS820H, SRAS830H, and up to SRAS8150H - share identical TO-263AB (D2PAK) mechanical footprint, pinout, and thermal pad layout. Voltage rating differences (20 V to 150 V) do not affect physical compatibility, enabling design reuse across platforms with different bus voltages.

Does SRAS820H require moisture sensitivity handling before reflow?

No. The SRAS820H is rated Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, meaning it has unlimited floor life and does not require dry pack storage or baking prior to reflow soldering - simplifying manufacturing flow and reducing process risk.

What is the typical forward voltage of SRAS820H at 8 A and 125°C junction temperature?

The datasheet specifies V_F = 0.55 V maximum at 8 A and 25°C. While no exact value is given at 125°C, the typical forward voltage decreases ~2 mV/°C for Schottky diodes; thus, SRAS820H typically exhibits ~0.45–0.48 V at 8 A and 125°C, confirmed by Fig.4 "Typical Forward Characteristics" curves.

Can SRAS820H be used in place of a standard PN-junction rectifier in a 12 V automotive circuit?

Yes - the SRAS820H replaces standard PN rectifiers in 12 V automotive circuits to reduce power loss and improve efficiency. Its 0.55 V V_F cuts conduction loss by ~50% versus a typical 1N5408 (0.95 V), lowering thermal stress and enabling smaller heatsinks. Its AEC-Q101 qualification further validates suitability for under-hood use where PN diodes lack reliability assurance.

SRAS820H Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 20 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 8 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 20 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263AB (D2PAK)

Operating Temperature - Junction:: -55°C ~ 125°C

SRAS820H FAQ

1.How can I place an order for SRAS820H through Aetrix?

Please submit a Request for Quotation (RFQ) for SRAS820H 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 SRAS820H reliable?

The price and inventory of SRAS820H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAS820H is usually 5 days.

3.What payment methods are accepted for SRAS820H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAS820H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SRAS820H?

SRAS820H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SRAS820H 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 SRAS820H?

For technical support, including SRAS820H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAS820H requirements.

6.How does Aetrix verify that SRAS820H is sourced from the original manufacturer or authorized distributors?

All SRAS820H 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 SRAS820H meets industry standards.

7.What is the process for return or replacement of SRAS820H?

All SRAS820H units undergo pre-shipment inspection (PSI). If there is an issue with SRAS820H, 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 SRAS820H part is unused and in its original packaging.

Return procedure for SRAS820H:

1.Submit a request within 90 days.

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

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