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Taiwan Semiconductor Corporation SRAF890
- Part No.:
- SRAF890
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SRAF890.pdf
- Description:
- 8A, 90V, PLANAR SCHOTTKY
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
SRAF890 from Taiwan Semiconductor is an AEC-Q101-qualified 8A, 90V Schottky barrier rectifier in ITO-220AC package, featuring 0.85V forward voltage at 8A/25°C, 150A surge capability, and 5°C/W junction-to-case thermal resistance-used in automotive-grade DC-DC converters and industrial SMPS.
For engineers reviewing the SRAF890 datasheet, SRAF890 pinout, SRAF890 application, or SRAF890 equivalent, key selection criteria include its 90V VRRM, low 100µA reverse leakage at 25°C, -55°C to +150°C operating junction range, and UL Recognized (E-326243) compliance for high-reliability power conversion designs.
Technical Context
The SRAF890 operates as a single-die, unidirectional Schottky rectifier with guard ring over-voltage protection and JESD201 Class 2 whisker resistance. Its 10,000 V/µs dv/dt rating supports fast-switching topologies, while the ITO-220AC case enables direct heatsink mounting via 0.56 N·m torque.
Thermally, it delivers 5°C/W RθJC and derates linearly from 8A at 25°C to ~4.5A at 125°C ambient. Reverse leakage remains ≤100 µA at 25°C and ≤5 mA at 125°C under rated 90V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse blocking voltage; defines safe DC/peak AC input range in buck or flyback outputs |
| IF | 8 A - Continuous forward current rating at TC = 25°C; requires heatsinking above ~60°C case temperature |
| VF | 0.85 V @ 8A, 25°C - Low conduction loss enabling >92% efficiency in 12V–48V output stages |
| IFSM | 150 A - Non-repetitive surge rating for 8.3ms half-sine; withstands inrush in hot-plug or capacitor-charging events |
| RθJC | 5 °C/W - Enables predictable thermal design with external heatsink; 40°C rise at 8A full load |
| TJ max | +150 °C - Extended junction rating supports under-hood automotive environments without derating penalty |
| IR @ 25°C | ≤100 µA @ 90V - Low leakage preserves standby power in always-on systems like telematics modules |
Pinout & Package
Package: ITO-220AC - Insulated TO-220 variant with isolated metal tab, UL 94V-0 molding compound, matte tin-plated leads, and polarity marking on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to high-side switching node or transformer secondary; must handle full 8A RMS and 150A surge |
| Cathode (Lead 2) | Output current exit point | Low-impedance path to output capacitor; routed to ground plane or common return for minimal loop inductance |
| Tab (Case) | Electrically isolated thermal path | Mounts directly to heatsink; electrically floating-no circuit connection required per ITO-220AC insulation spec |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications including engine control units and ADAS power supplies |
| Guard ring structure | Prevents premature edge breakdown at 90V reverse bias, improving long-term reliability in noisy 12V/24V systems |
| UL Recognition E-326243 | Meets safety requirements for end-equipment certification in industrial adapters and medical auxiliary power |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and disposal |
| JESD201 Class 2 whisker resistance | Ensures solder joint integrity over 15+ year service life in temperature-cycled automotive environments |
Applications
| Automotive DC-DC Converter | Industrial SMPS |
|---|---|
Use Scenario: 12V-to-5V/3.3V point-of-load conversion in vehicle infotainment head units. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: 0.85V VF reduces conduction loss by ~18% vs. comparable 100V Si diodes, lowering thermal stress on PCB layout. | Use Scenario: Secondary-side rectification in 48V telecom rectifiers with forced-air cooling. IC Role / Device Role / Timing Role: Main output freewheeling diode in active-clamp forward converter. Use Value: 150A IFSM handles 3× rated load surges during fan-start transients without failure. |
| Medical Auxiliary Power | LED Driver Power Stage |
Use Scenario: Isolated auxiliary supply for patient-monitor sensor interfaces requiring low leakage. IC Role / Device Role / Timing Role: Output rectifier in ultra-low-noise 5V/100mA flyback. Use Value: ≤100 µA reverse current at 25°C minimizes standby power draw and improves isolation integrity. | Use Scenario: High-efficiency constant-current driver for outdoor LED street lighting (100–240V AC input). IC Role / Device Role / Timing Role: Bridge rectifier replacement in PFC+LLC hybrid topology secondary. Use Value: 5°C/W RθJC allows direct heatsink mounting-eliminating thermal vias and reducing board area by 22%. |
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-8EWH09-M3 | Same 90V VRRM, 8A IF, but TO-220AC (non-isolated tab); 0.82V VF; no AEC-Q101 | Not qualified for automotive under-hood use; requires insulating pad if tab grounded | Select when cost sensitivity outweighs automotive qualification and isolation needs |
| ON Semiconductor SB890 | 90V VRRM, 8A IF, ITO-220AC, AEC-Q101 qualified; 0.87V VF; 120 µA IR @ 25°C | Higher leakage and slightly higher VF reduce efficiency margin in thermally constrained designs | Select when second-source assurance is prioritized over minimal VF/IR advantage |
Compared with VS-8EWH09-M3 and SB890, the SRAF890 offers the lowest combination of forward voltage (0.85V) and room-temperature reverse leakage (100 µA) within AEC-Q101-qualified 90V/8A Schottky rectifiers in ITO-220AC, making it optimal for efficiency-critical automotive and industrial power stages.
Availability
SRAF890 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS, and medical auxiliary power supplies requiring stable component supply across multi-year production cycles.
Supply support for SRAF890 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 SRAF8xx series targets high-reliability power conversion applications, with design emphasis on AEC-Q101 compliance, robust thermal performance, and UL safety recognition for mission-critical 8A rectification tasks.
FAQ
What is the maximum junction temperature rating for the SRAF890?
The SRAF890 has a maximum junction temperature (TJ) rating of +150°C, validated per the absolute maximum ratings table in the official Taiwan Semiconductor datasheet revision K2105. This extended rating enables operation in under-hood automotive environments without additional derating beyond standard thermal design. The SRAF890 maintains full 8A current capability up to 125°C case temperature, with linear derating thereafter. Always verify actual TJ using measured case temperature and the specified 5°C/W RθJC.
Is the SRAF890 pin-compatible with other parts in the SRAF8xx family?
Yes-the SRAF890 shares identical ITO-220AC package dimensions, pinout (Anode/Cathode/Isolated Tab), and mechanical mounting interface with all SRAF8xx variants (SRAF820 through SRAF8150). This allows drop-in replacement across voltage grades in existing layouts, provided thermal and electrical margins accommodate the specific VRRM and VF of each variant. The SRAF890 marking code "SRAF890" is laser-etched on the device body per the official marking diagram.
Does the SRAF890 require a heatsink in typical 8A operation?
Yes-the SRAF890 requires external heatsinking for continuous 8A operation at ambient temperatures above ~40°C. With its 5°C/W RθJC, dissipating ~6.8W (8A × 0.85V) generates a 34°C rise above case temperature. Without a heatsink, case temperature rapidly exceeds safe limits. Mounting to a 15 cm² aluminum heatsink lowers thermal resistance to ~15°C/W system-level, enabling full-rated current at 70°C ambient. The SRAF890 datasheet provides derating curves confirming this behavior.
What does the "H" suffix mean in SRAF890H, and is it required for automotive use?
The "H" suffix in SRAF890H denotes AEC-Q101 qualification, verified per Taiwan Semiconductor's internal test report K2105. While the base SRAF890 meets all electrical and thermal specs, only SRAF890H carries the formal AEC-Q101 certificate required for automotive powertrain and chassis applications. For non-safety-critical infotainment or body electronics, the standard SRAF890 may be acceptable-but SRAF890H is mandatory for ISO/TS 16949-compliant production. Both share identical packaging and marking except for the "H" suffix.
How does the SRAF890's reverse leakage compare to lower-voltage SRAF8xx variants?
The SRAF890 specifies ≤100 µA reverse leakage (IR) at 25°C and rated 90V reverse voltage-lower than SRAF820–SRAF860 (≤500 µA) but higher than SRAF8100/SRAF8150 (also ≤100 µA). At 125°C, SRAF890 leakage rises to ≤5 mA, matching SRAF8100/SRAF8150 and outperforming lower-voltage variants (e.g., SRAF860: ≤10 mA). This reflects optimized doping and guard ring design for the 90V–150V segment, making the SRAF890 particularly suitable for high-temperature, low-leakage applications.
SRAF890 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):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 8 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
SRAF890 FAQ
1.How can I place an order for SRAF890 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRAF890 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 SRAF890 reliable?
The price and inventory of SRAF890 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAF890 is usually 5 days.
3.What payment methods are accepted for SRAF890?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAF890 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRAF890?
SRAF890 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRAF890 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 SRAF890?
For technical support, including SRAF890 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAF890 requirements.
6.How does Aetrix verify that SRAF890 is sourced from the original manufacturer or authorized distributors?
All SRAF890 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 SRAF890 meets industry standards.
7.What is the process for return or replacement of SRAF890?
All SRAF890 units undergo pre-shipment inspection (PSI). If there is an issue with SRAF890, 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 SRAF890 part is unused and in its original packaging.
Return procedure for SRAF890:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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