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

Taiwan Semiconductor Corporation SRAS2020H

Name: SRAS2020H
Brand: Taiwan Semiconductor Corporation
SKU: SRAS2020H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SRAS2020H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SRAS2020H.pdf

Description:: 20A, 20V, PLANAR SCHOTTKY

Quantity:: RFQ Add To RFQ list

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Inventory:9,617

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Product details

Overview

SRAS2020H from Taiwan Semiconductor is a 20A, 20V repetitive peak reverse voltage Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring 0.57V forward voltage at 20A/25°C, 330A surge capability, and AEC-Q101 qualification for automotive-grade reliability in low-voltage DC/DC converters and reverse battery protection circuits.

For engineers reviewing the SRAS2020H datasheet, SRAS2020H pinout, SRAS2020H application, or SRAS2020H equivalent, key selection criteria include its 20V V_RRM, 1.5°C/W junction-to-case thermal resistance, guard ring overvoltage protection, moisture sensitivity level 1 rating, and compatibility with automated SMT placement per J-STD-002 solderability standards.

Technical Context

The SRAS2020H implements a single-die Schottky barrier structure optimized for low forward voltage drop and fast switching in high-frequency power conversion. Its 20V V_RRM rating targets low-voltage bus applications, while the 330A I_FSM supports robust transient handling during load dumps or inductive kick events.

Thermally, the device delivers 1.5°C/W R_θJC via its TO-263AB copper leadframe and exposed thermal pad, enabling efficient heat transfer to PCB copper. The AEC-Q101 qualification confirms operation across –55°C to +150°C junction temperature range with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in low-voltage DC rails
I_F	20 A - Continuous forward current rating at case temperature ≤ 100°C; sets steady-state power delivery capacity
I_FSM	330 A - Non-repetitive surge current (8.3 ms half-sine); enables survival during automotive load dump transients
V_F	0.57 V - Forward voltage at 20 A and 25°C; directly determines conduction loss and system efficiency
R_θJC	1.5 °C/W - Junction-to-case thermal resistance; quantifies thermal path efficiency to heatsink or PCB copper
T_J max	+150 °C - Maximum allowable junction temperature; constrains thermal design margin in enclosed environments
MSL	Level 1 - Moisture sensitivity per J-STD-020; allows unlimited floor life before reflow, simplifying SMT logistics

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, with exposed thermal pad on underside and three terminals: Anode, Cathode, and Thermal Pad (electrically connected to cathode).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connects to lower-potential side of circuit; polarity-marked on top surface
Cathode	Output current exit point	Connected to higher-potential rail; electrically tied to exposed thermal pad
Thermal Pad	Thermal and electrical node	Must be soldered to large PCB copper area for thermal dissipation; same potential as cathode

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive underhood use including temperature cycling, mechanical shock, and humidity testing
Guard ring structure	Enhances edge termination robustness against localized overvoltage stress and surface leakage
Low V_F = 0.57 V @ 20A	Reduces conduction losses by ~30% vs. comparable 40V Schottkys, improving efficiency in 12V–24V systems
High I_FSM = 330 A	Withstands automotive ISO 7637-2 pulse 5a without failure, eliminating need for external TVS in many designs
Halogen-free & RoHS	Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing

Applications

Low-Voltage DC/DC Converter	Reverse Battery Protection
Use Scenario: Secondary-side synchronous rectification in 12V input, 3.3V/5V output buck converters for ADAS ECUs. IC Role / Device Role / Timing Role: Schottky rectifier replacing MOSFETs in secondary-side synchronous topology to reduce gate drive complexity. Use Value: 0.57V V_F minimizes conduction loss at 20A load, sustaining >92% efficiency at full load without active cooling.	Use Scenario: Polarity protection between vehicle battery and infotainment head unit power input. IC Role / Device Role / Timing Role: Low-loss series-blocking diode preventing damage during accidental reverse connection. Use Value: 20V V_RRM matches 12V nominal systems with margin for cold-crank dips; 330A I_FSM handles jump-start surges.
Car Lighting Driver	Freewheeling Diode in BLDC Inverter
Use Scenario: Output rectification in LED driver modules powering adaptive front lighting (AFL) arrays. IC Role / Device Role / Timing Role: High-current freewheeling path during PWM dimming transitions. Use Value: Fast recovery and low V_F prevent thermal runaway at 20A pulsed loads; MSL Level 1 ensures no bake-out required pre-assembly.	Use Scenario: Freewheeling path across motor phase windings in 24V HVAC blower inverters. IC Role / Device Role / Timing Role: Clamp inductive energy during MOSFET turn-off in 3-phase bridge. Use Value: Guard ring improves reliability under repeated voltage reversal during commutation; TO-263AB thermal pad enables direct PCB heatsinking.

Low-Voltage DC/DC Converter

Reverse Battery Protection

Use Scenario: Secondary-side synchronous rectification in 12V input, 3.3V/5V output buck converters for ADAS ECUs.

IC Role / Device Role / Timing Role: Schottky rectifier replacing MOSFETs in secondary-side synchronous topology to reduce gate drive complexity.

Use Value: 0.57V V_F minimizes conduction loss at 20A load, sustaining >92% efficiency at full load without active cooling.

Use Scenario: Polarity protection between vehicle battery and infotainment head unit power input.

IC Role / Device Role / Timing Role: Low-loss series-blocking diode preventing damage during accidental reverse connection.

Use Value: 20V V_RRM matches 12V nominal systems with margin for cold-crank dips; 330A I_FSM handles jump-start surges.

Car Lighting Driver

Freewheeling Diode in BLDC Inverter

Use Scenario: Output rectification in LED driver modules powering adaptive front lighting (AFL) arrays.

IC Role / Device Role / Timing Role: High-current freewheeling path during PWM dimming transitions.

Use Value: Fast recovery and low V_F prevent thermal runaway at 20A pulsed loads; MSL Level 1 ensures no bake-out required pre-assembly.

Use Scenario: Freewheeling path across motor phase windings in 24V HVAC blower inverters.

IC Role / Device Role / Timing Role: Clamp inductive energy during MOSFET turn-off in 3-phase bridge.

Use Value: Guard ring improves reliability under repeated voltage reversal during commutation; TO-263AB thermal pad enables direct PCB heatsinking.

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-20BQ020TRPBF	Same 20V V_RRM, 20A I_F, TO-263AB package; V_F = 0.52V @ 20A but only rated to +125°C T_J max	Lacks AEC-Q101 qualification; not validated for automotive underhood thermal cycling	Select when cost sensitivity outweighs automotive qualification requirements
ON Semiconductor SB2020E	20V V_RRM, 20A I_F, TO-263AB; V_F = 0.59V @ 20A; R_θJC = 1.8°C/W; AEC-Q101 qualified	Higher thermal resistance reduces power density margin; identical automotive qualification scope	Prefer when supply chain diversification is needed and 0.3°C/W higher R_θJC is acceptable

Compared with VS-20BQ020TRPBF and SB2020E, the SRAS2020H offers the best balance of low V_F (0.57V), AEC-Q101 compliance, and superior thermal performance (1.5°C/W), making it optimal for space-constrained, thermally demanding automotive modules where both efficiency and qualification are mandatory.

Availability

SRAS2020H is available at Aetrix Electronics and suitable for automotive electronics, industrial DC/DC power supplies, and LED lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SRAS2020H 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 discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power devices, ESD protection, and automotive-qualified components.

The SRAS2020H belongs to TSC's AEC-Q101-certified Schottky rectifier product line, engineered specifically for high-reliability 12V–24V automotive subsystems including body control, lighting, and infotainment power stages.

FAQ

What is the maximum junction temperature rating for SRAS2020H?

The SRAS2020H has a maximum junction temperature (T_J) rating of +150°C, verified per AEC-Q101 stress test conditions. This allows operation in under-hood automotive environments where ambient temperatures reach +105°C, provided thermal design maintains junction temperature below this limit using the specified 1.5°C/W R_θJC path. Derating curves in the datasheet define safe I_F limits above 100°C case temperature.

Is SRAS2020H pin-compatible with other parts in the SRAS20xxH family?

Yes, all SRAS20xxH variants-including SRAS2020H, SRAS2030H, and up to SRAS20150H-share identical TO-263AB (D2PAK) package dimensions, pinout, and thermal pad layout. This enables voltage-scaling design reuse across 20V–150V ratings without PCB revision, though layout must accommodate worst-case thermal and surge requirements of the highest-rated variant used.

Does SRAS2020H require special handling due to moisture sensitivity?

No-SRAS2020H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking or dry-pack handling prior to reflow. This simplifies SMT line integration and eliminates moisture-related popcorning risk during standard lead-free reflow profiles.

What is the reverse leakage current specification for SRAS2020H at 100°C?

At T_J = 100°C and rated V_R = 20V, the SRAS2020H specifies a maximum reverse current (I_R) of 15 mA. This value is critical for low-power standby circuits where leakage could drain battery reserves; the 15 mA limit ensures compatibility with automotive sleep-mode current budgets when used in reverse-battery protection paths.

How does the guard ring feature improve reliability in SRAS2020H?

SRAS2020H incorporates a guard ring structure around the Schottky junction edge to suppress surface electric field crowding and prevent premature avalanche breakdown under transient overvoltage. This extends operational life in automotive environments subject to load dump (ISO 7637-2 Pulse 5a) and improves long-term stability of reverse leakage characteristics at elevated temperatures.

SRAS2020H 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):: 20A

Voltage - Forward (Vf) (Max) @ If:: 570 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 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 ~ 150°C

SRAS2020H FAQ

1.How can I place an order for SRAS2020H through Aetrix?

Please submit a Request for Quotation (RFQ) for SRAS2020H 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 SRAS2020H reliable?

The price and inventory of SRAS2020H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAS2020H is usually 5 days.

3.What payment methods are accepted for SRAS2020H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAS2020H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SRAS2020H?

SRAS2020H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SRAS2020H 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 SRAS2020H?

For technical support, including SRAS2020H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAS2020H requirements.

6.How does Aetrix verify that SRAS2020H is sourced from the original manufacturer or authorized distributors?

All SRAS2020H 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 SRAS2020H meets industry standards.

7.What is the process for return or replacement of SRAS2020H?

All SRAS2020H units undergo pre-shipment inspection (PSI). If there is an issue with SRAS2020H, 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 SRAS2020H part is unused and in its original packaging.

Return procedure for SRAS2020H:

1.Submit a request within 90 days.

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

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