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

Taiwan Semiconductor Corporation SRAF1090

Name: SRAF1090
Brand: Taiwan Semiconductor Corporation
SKU: SRAF1090
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SRAF1090

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-2 Full Pack

Datasheet:: SRAF1090.pdf

Description:: 10A, 90V, PLANAR SCHOTTKY

Quantity:: RFQ Add To RFQ list

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Inventory:4,632

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Product details

Overview

SRAF1090 from Taiwan Semiconductor is a 10A, 90V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AC package, featuring 0.85V forward voltage at 10A and 25°C, 200A surge capability, 4°C/W junction-to-case thermal resistance, and AEC-Q101 qualification for automotive power conversion.

For engineers reviewing the SRAF1090 datasheet, SRAF1090 pinout, SRAF1090 application, or SRAF1090 equivalent, this device serves as a high-efficiency, low-loss output rectifier in SMPS, DC-DC converters, and automotive adapters where thermal performance, surge robustness, and reliability under elevated junction temperature (up to +150°C) are critical selection criteria.

Technical Context

The SRAF1090 uses a single-die Schottky structure with guard ring over-voltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its 10,000 V/µs critical dv/dt rating supports fast-switching topologies without spurious turn-on.

Thermally, it delivers 4°C/W R_θJC into the heatsink via its ITO-220AC case, enabling stable 10A continuous conduction up to T_J = +150°C when mounted with ≤0.56 N·m torque and UL 94V-0 molding compound.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	90 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback/freewheeling paths
I_F	10 A - Continuous average forward current; sets minimum heatsink sizing for steady-state power dissipation
V_F @ 10A, 25°C	0.85 V - Low conduction loss enables >92% efficiency in 12V-output SMPS at full load
I_FSM	200 A - Non-repetitive surge rating; withstands inrush and transient overload without failure
R_θJC	4 °C/W - Enables direct thermal coupling to heatsink; allows 40W max power dissipation at ΔT = 160°C
T_J max	+150 °C - Extended junction temperature rating supports under-hood automotive environments
I_R @ 90V, 125°C	5 mA - Low leakage preserves efficiency in high-temp operation and reduces standby loss

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with isolated tab, UL 94V-0 molding, and matte tin-plated leads. Mounting torque ≤0.56 N·m. Polarity marked on device body.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Input current entry point	Connected to switching node or transformer secondary; must handle full 10A RMS and 200A surge
Cathode (Lead 2)	Output current exit point	Connected to output capacitor and load; low-inductance layout required to minimize ringing
Tab (Isolated)	Thermal path only	Electrically isolated metal surface for heatsink attachment; no electrical connection to die

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test plan
Guard ring structure	Prevents edge breakdown at rated V_RRM, ensuring stable reverse blocking even with PCB trace field enhancement
UL Recognized (E-326243)	Meets safety standards for end-equipment certification in AC/DC adapters and industrial power supplies
Halogen-free & RoHS	Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for green manufacturing and export compliance
JESD 201 Class 2 whisker resistance	Eliminates tin whisker growth risk in long-life applications such as automotive ECUs and industrial controllers

Applications

Automotive DC-DC Converters	Industrial SMPS Outputs
Use Scenario: High-efficiency 12V-to-5V/3.3V buck converter in engine control unit (ECU) power rail. IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFET+driver; conducts during low-side switch conduction phase. Use Value: 0.85V V_F reduces conduction loss by ~35% vs. silicon diode, lowering thermal load in confined ECU housing.	Use Scenario: Secondary-side rectification in 48V-input telecom rectifier module. IC Role / Device Role / Timing Role: Freewheeling diode in active clamp forward topology; handles discontinuous conduction mode transitions. Use Value: 200A I_FSM withstands startup surges; 4°C/W R_θJC enables compact heatsinking in 1U chassis.
USB-C PD Adapters	Server VRM Output Stage
Use Scenario: 20V-output synchronous rectifier in 65W USB-C power adapter. IC Role / Device Role / Timing Role: Unidirectional current path during PWM off-time; clamps transformer leakage energy. Use Value: 90V V_RRM provides 2× margin over 20V output with reflected transients; low IR ensures <100µA standby leakage.	Use Scenario: Point-of-load (POL) rectification in 12V-input server VRM supplying CPU core voltage. IC Role / Device Role / Timing Role: High-current freewheeling element in multiphase buck stage; operates at 300–500 kHz. Use Value: 10,000 V/µs dv/dt rating prevents false turn-on during fast gate drive edges; 150°C T_J max sustains operation under airflow-limited conditions.

Automotive DC-DC Converters

Industrial SMPS Outputs

Use Scenario: High-efficiency 12V-to-5V/3.3V buck converter in engine control unit (ECU) power rail.

IC Role / Device Role / Timing Role: Output synchronous rectifier replacing MOSFET+driver; conducts during low-side switch conduction phase.

Use Value: 0.85V V_F reduces conduction loss by ~35% vs. silicon diode, lowering thermal load in confined ECU housing.

Use Scenario: Secondary-side rectification in 48V-input telecom rectifier module.

IC Role / Device Role / Timing Role: Freewheeling diode in active clamp forward topology; handles discontinuous conduction mode transitions.

Use Value: 200A I_FSM withstands startup surges; 4°C/W R_θJC enables compact heatsinking in 1U chassis.

USB-C PD Adapters

Server VRM Output Stage

Use Scenario: 20V-output synchronous rectifier in 65W USB-C power adapter.

IC Role / Device Role / Timing Role: Unidirectional current path during PWM off-time; clamps transformer leakage energy.

Use Value: 90V V_RRM provides 2× margin over 20V output with reflected transients; low IR ensures <100µA standby leakage.

Use Scenario: Point-of-load (POL) rectification in 12V-input server VRM supplying CPU core voltage.

IC Role / Device Role / Timing Role: High-current freewheeling element in multiphase buck stage; operates at 300–500 kHz.

Use Value: 10,000 V/µs dv/dt rating prevents false turn-on during fast gate drive edges; 150°C T_J max sustains operation under airflow-limited conditions.

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-10EQ090-M3	Same ITO-220AC package, 10A/90V rating, but V_F = 0.78V @ 10A (25°C); no AEC-Q101 qualification	Preferred for cost-sensitive industrial SMPS where automotive qualification is unnecessary	Select when lower forward drop is prioritized and automotive reliability testing is not required
ON Semiconductor SB1090	ITO-220AC, 10A/90V, V_F = 0.87V @ 10A (25°C); AEC-Q101 qualified; R_θJC = 4.5°C/W	Suitable for identical automotive use cases but requires slightly larger heatsink due to higher thermal resistance	Choose if supply chain diversification is needed while maintaining AEC-Q101 compliance and same voltage/current class

Compared with VS-10EQ090-M3 and SB1090, the SRAF1090 offers the optimal balance of low V_F (0.85V), certified automotive reliability, and best-in-class thermal resistance (4°C/W), making it preferred for space-constrained, high-temperature automotive and industrial power designs.

Availability

SRAF1090 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS outputs, and USB-C PD adapters requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SRAF1090 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, serving global automotive, industrial, and consumer markets since 1979.

The SRAF series is part of TSC's high-reliability Schottky rectifier product line, engineered specifically for high-efficiency, high-surge, and high-temperature power conversion in automotive and industrial applications.

FAQ

What is the maximum junction temperature rating for the SRAF1090?

The SRAF1090 has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table and supported by thermal derating curves. This extended rating enables reliable operation in under-hood automotive environments and high-power-density industrial SMPS where ambient temperatures exceed 85°C. The SRAF1090 maintains specified electrical performance up to this limit when mounted with proper heatsinking and torque control.

Does the SRAF1090 have AEC-Q101 qualification?

Yes, the SRAF1090 is AEC-Q101 qualified - confirmed by ordering code suffix "H" (e.g., SRAF1090H) and explicitly stated in the features list. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress test (uHAST), validating suitability for automotive power electronics. Standard SRAF1090 (non-H) is not AEC-Q101 qualified.

What is the forward voltage of the SRAF1090 at 10A and 125°C?

The SRAF1090 forward voltage (V_F) is not explicitly specified at 125°C in the provided data sheet; only the 25°C value (0.85V typ) and 100°C reverse leakage are given. However, typical Schottky behavior shows V_F decreases ~2 mV/°C, so V_F at 125°C is estimated near 0.75V. For design-critical applications, engineers should consult the SRAF1090 forward characteristics curve (Fig.4) or perform bench validation under actual thermal conditions.

Is the SRAF1090 pin-compatible with other devices in the SRAF10xx family?

Yes, all SRAF10xx devices - including SRAF1020 through SRAF10150 - share identical ITO-220AC package dimensions, pinout (anode/cathode/tab), and mechanical mounting specifications. This allows direct substitution across voltage grades without PCB layout changes, provided thermal and electrical margins (e.g., V_RRM, I_R) are verified for the target application.

What is the reverse leakage current of the SRAF1090 at rated voltage and 125°C?

The SRAF1090 exhibits a maximum reverse leakage current (I_R) of 5 mA at V_R = 90V and T_J = 125°C, as specified in the Electrical Specifications table. This value is critical for low-quiescent-current designs such as automotive always-on modules, where excessive leakage could drain battery reserves. At 25°C and 90V, I_R is limited to 100 µA, confirming strong temperature-dependent leakage control.

SRAF1090 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-220-2 Full Pack

Packaging:: Tube

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 90 V

Current - Average Rectified (Io):: 10A

Voltage - Forward (Vf) (Max) @ If:: 850 mV @ 10 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 90 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ITO-220AC

Operating Temperature - Junction:: -55°C ~ 150°C

SRAF1090 FAQ

1.How can I place an order for SRAF1090 through Aetrix?

Please submit a Request for Quotation (RFQ) for SRAF1090 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 SRAF1090 reliable?

The price and inventory of SRAF1090 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAF1090 is usually 5 days.

3.What payment methods are accepted for SRAF1090?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAF1090 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SRAF1090?

SRAF1090 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SRAF1090 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 SRAF1090?

For technical support, including SRAF1090 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAF1090 requirements.

6.How does Aetrix verify that SRAF1090 is sourced from the original manufacturer or authorized distributors?

All SRAF1090 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 SRAF1090 meets industry standards.

7.What is the process for return or replacement of SRAF1090?

All SRAF1090 units undergo pre-shipment inspection (PSI). If there is an issue with SRAF1090, 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 SRAF1090 part is unused and in its original packaging.

Return procedure for SRAF1090:

1.Submit a request within 90 days.

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

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