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

Taiwan Semiconductor Corporation SRAS20100H

Name: SRAS20100H
Brand: Taiwan Semiconductor Corporation
SKU: SRAS20100H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SRAS20100H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SRAS20100H.pdf

Description:: DIODE SCHOTTKY 100V 20A TO263AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,788

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Product details

Overview

SRAS20100H from Taiwan Semiconductor is a 20A, 100V Schottky barrier rectifier in TO-263AB (D2PAK) package, designed for high-efficiency DC/DC conversion and freewheeling applications with low forward voltage (0.92 V at 20 A, 25°C) and high surge capability (330 A, 8.3 ms). It features AEC-Q101 qualification, guard ring overvoltage protection, and moisture sensitivity level 1.

For engineers reviewing the SRAS20100H datasheet, SRAS20100H pinout, SRAS20100H application, or SRAS20100H equivalent, key selection factors include its 100 V repetitive peak reverse voltage, 1.5 °C/W junction-to-case thermal resistance, 150°C max junction temperature, and suitability for automotive lighting and reverse battery protection circuits requiring robust surge handling and low conduction loss.

Technical Context

The SRAS20100H uses a single-die Schottky structure optimized for low VF and fast switching, with a guard ring to enhance ruggedness against transient overvoltage. Its TO-263AB package provides low thermal resistance (1.5 °C/W) and supports high-current PCB mounting via the exposed cathode tab.

Electrical behavior is characterized by low leakage (100 µA at 100 V, 25°C), stable VF across temperature, and derated forward current above 75°C. Reverse recovery is inherently negligible due to majority-carrier conduction, eliminating switching losses typical of PN diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased freewheeling or reverse-polarity protection.
I_F	20 A - Continuous average forward current at case temperature ≤ 75°C; determines steady-state power delivery capacity.
I_FSM	330 A - Non-repetitive surge current (8.3 ms half-sine); enables survival during load dump or inductive turn-off transients.
V_F	0.92 V - Forward voltage at 20 A, 25°C; directly sets conduction loss (18.4 W at full load) and thermal design margin.
R_θJC	1.5 °C/W - Junction-to-case thermal resistance; allows accurate heatsink sizing when mounted on copper area ≥ 100 mm².
T_J max	+150°C - Maximum allowable junction temperature; permits operation in under-hood automotive environments with proper thermal management.
I_R	100 µA - Reverse leakage at rated V_RRM, 25°C; ensures minimal standby power loss in battery-sensitive systems.

Pinout & Package

Package: TO-263AB (D2PAK) - surface-mount power package with exposed cathode tab for thermal and electrical connection; 3-terminal configuration (Anode, Cathode, Cathode Tab).

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Input anode terminal	Soldered to positive-side circuit node; carries full forward current into device.
Cathode (Lead 2)	Output cathode terminal	Connected to load return or ground reference; forms low-VF path during conduction.
Cathode Tab (Exposed pad)	Primary cathode & thermal path	Must be soldered to large copper pour for thermal dissipation and low-inductance cathode return.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements.
Guard ring structure	Enhances edge termination robustness, raising actual breakdown voltage margin beyond rated V_RRM during voltage transients.
Moisture sensitivity level 1	Zero bake requirement before reflow; compatible with standard SMT assembly without dry-pack handling.
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS directives; suitable for environmentally regulated industrial and automotive production.
High surge current capability	330 A rating enables use in high-energy inductive switching circuits without external snubbers or derating.

Applications

Low-voltage DC/DC Converter	Reverse Battery Protection
Use Scenario: Secondary-side synchronous rectification in 12 V input, 3.3–5 V output buck converters for ADAS ECUs. IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier replacing MOSFETs where simplicity and zero gate drive are preferred. Use Value: 0.92 V forward drop minimizes conduction loss at 20 A, improving efficiency by ~2.5% vs. higher-VF alternatives at full load.	Use Scenario: Input polarity protection for infotainment head units powered from vehicle battery rail. IC Role / Device Role / Timing Role: Series-connected anode-to-load, cathode-to-battery; blocks reverse current during accidental battery reversal. Use Value: 100 V V_RRM withstands load dump spikes up to 120 V, while 100 µA leakage preserves battery life during long-term parking.
Automotive LED Lighting	Freewheeling Diode in Relay Drivers
Use Scenario: Output rectification in constant-current LED drivers for exterior lighting modules (headlamps, DRLs). IC Role / Device Role / Timing Role: High-frequency freewheeling path during PWM dimming cycles; handles 20 A peak LED current. Use Value: Low VF reduces self-heating in confined lamp housings; AEC-Q101 qualification ensures 15-year field reliability.	Use Scenario: Snubberless flyback protection across 24 V relay coils in body control modules. IC Role / Device Role / Timing Role: Provides low-loss, fast-turn-on path for coil energy dissipation during de-energization. Use Value: 330 A I_FSM safely absorbs 500 mJ coil energy without degradation; TO-263AB thermal mass prevents localized overheating.

Low-voltage DC/DC Converter

Reverse Battery Protection

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

IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier replacing MOSFETs where simplicity and zero gate drive are preferred.

Use Value: 0.92 V forward drop minimizes conduction loss at 20 A, improving efficiency by ~2.5% vs. higher-VF alternatives at full load.

Use Scenario: Input polarity protection for infotainment head units powered from vehicle battery rail.

IC Role / Device Role / Timing Role: Series-connected anode-to-load, cathode-to-battery; blocks reverse current during accidental battery reversal.

Use Value: 100 V V_RRM withstands load dump spikes up to 120 V, while 100 µA leakage preserves battery life during long-term parking.

Automotive LED Lighting

Freewheeling Diode in Relay Drivers

Use Scenario: Output rectification in constant-current LED drivers for exterior lighting modules (headlamps, DRLs).

IC Role / Device Role / Timing Role: High-frequency freewheeling path during PWM dimming cycles; handles 20 A peak LED current.

Use Value: Low VF reduces self-heating in confined lamp housings; AEC-Q101 qualification ensures 15-year field reliability.

Use Scenario: Snubberless flyback protection across 24 V relay coils in body control modules.

IC Role / Device Role / Timing Role: Provides low-loss, fast-turn-on path for coil energy dissipation during de-energization.

Use Value: 330 A I_FSM safely absorbs 500 mJ coil energy without degradation; TO-263AB thermal mass prevents localized overheating.

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-20CPH100	Same 100 V V_RRM, 20 A I_F, but TO-247AC package; R_θJC = 1.0 °C/W; VF = 0.89 V @ 20 A.	Higher thermal performance but through-hole mounting; not SMT-compatible.	Select for higher-power designs where board space allows through-hole and heatsinking is critical.
ON Semiconductor SB20100E	TO-263AB package, same footprint; V_RRM = 100 V, I_F = 20 A, but VF = 0.95 V @ 20 A and no AEC-Q101 qualification.	Lacks automotive qualification; leakage = 200 µA @ 100 V, 25°C - double that of SRAS20100H.	Acceptable for industrial DC/DC where qualification and ultra-low leakage are not required.

Compared with VS-20CPH100 and SB20100E, the SRAS20100H uniquely combines AEC-Q101 qualification, SMT-compatible TO-263AB packaging, 100 µA leakage, and 0.92 V VF - making it optimal for space-constrained, automotive-grade freewheeling and reverse protection where reliability and manufacturability are jointly prioritized.

Availability

SRAS20100H is available at Aetrix Electronics and suitable for automotive LED lighting, reverse battery protection, and DC/DC converter applications requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.

Supply support for SRAS20100H 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, TVS diodes, and rectifiers for automotive and industrial markets.

The SRAS20100H belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-current, high-reliability automotive power conversion and protection functions where low VF, surge robustness, and thermal performance are critical.

FAQ

What is the maximum junction temperature rating for SRAS20100H?

The SRAS20100H has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official datasheet. This rating enables operation in under-hood automotive environments when thermal design accounts for its 1.5 °C/W junction-to-case resistance. Derating of forward current begins above 75°C case temperature, as shown in the forward current derating curve.

Is SRAS20100H suitable for reverse battery protection in 12 V automotive systems?

Yes, the SRAS20100H is well-suited for reverse battery protection in 12 V systems. Its 100 V V_RRM exceeds typical load dump transients (up to 120 V), and its 100 µA reverse leakage at 25°C minimizes quiescent current drain. The device is AEC-Q101 qualified, confirming robustness for automotive deployment - a key requirement for SRAS20100H in such safety-critical roles.

Does SRAS20100H have a guard ring, and what function does it serve?

Yes, the SRAS20100H incorporates a guard ring structure, explicitly listed under FEATURES in the official datasheet. This design enhances edge termination stability, increasing effective breakdown voltage margin during fast-rising transients and improving ruggedness against localized overvoltage events - a critical reliability feature for SRAS20100H in automotive power rails.

What is the forward voltage of SRAS20100H at 20 A and 125°C?

The datasheet specifies forward voltage only at 25°C (0.92 V max at 20 A). While VF increases with temperature, no typ/max value is published for 125°C. Engineers should apply the typical VF vs. temperature coefficient (~−1.5 mV/°C for Schottky) and verify with thermal simulation. This limitation applies strictly to SRAS20100H and must be considered in high-temperature layout design.

What packaging and reel quantity is offered for SRAS20100H?

The SRAS20100H is supplied in TO-263AB (D2PAK) package on tape-and-reel format, with 800 units per reel, as confirmed in the ORDERING INFORMATION section of the official datasheet. This packaging supports automated SMT placement and is consistent across the SRAS20xH series - a key logistics detail for SRAS20100H procurement planning.

SRAS20100H 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):: 100 V

Current - Average Rectified (Io):: 20A

Voltage - Forward (Vf) (Max) @ If:: 920 mV @ 20 A

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

Reverse Recovery Time (trr):: -

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

SRAS20100H FAQ

1.How can I place an order for SRAS20100H through Aetrix?

Please submit a Request for Quotation (RFQ) for SRAS20100H 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 SRAS20100H reliable?

The price and inventory of SRAS20100H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAS20100H is usually 5 days.

3.What payment methods are accepted for SRAS20100H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAS20100H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SRAS20100H?

SRAS20100H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SRAS20100H 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 SRAS20100H?

For technical support, including SRAS20100H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAS20100H requirements.

6.How does Aetrix verify that SRAS20100H is sourced from the original manufacturer or authorized distributors?

All SRAS20100H 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 SRAS20100H meets industry standards.

7.What is the process for return or replacement of SRAS20100H?

All SRAS20100H units undergo pre-shipment inspection (PSI). If there is an issue with SRAS20100H, 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 SRAS20100H part is unused and in its original packaging.

Return procedure for SRAS20100H:

1.Submit a request within 90 days.

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

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