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Taiwan Semiconductor Corporation SR804
- Part No.:
- SR804
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR804.pdf
- Description:
- DIODE SCHOTTKY 40V 8A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:4,665
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Product details
Overview
SR804 from Taiwan Semiconductor is an AEC-Q101-qualified 8A, 40V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.55 V at 8A, 25°C), high surge current capability (150 A), and guard ring overvoltage protection - deployed in automotive-grade DC/DC converters and industrial SMPS.
For engineers reviewing the SR804 datasheet, SR804 pinout, SR804 application, or SR804 equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 125°C max junction temperature, 150 A surge rating, and DO-201AD mechanical compatibility with high-reliability power conversion designs.
Technical Context
The SR804 operates as a single-die Schottky rectifier optimized for high-efficiency switching applications, with a typical forward voltage of 0.55 V at 8 A and 25°C, and reverse leakage limited to 500 µA at 40 V and 25°C. Its junction-to-ambient thermal resistance is 40°C/W, supporting continuous conduction in thermally constrained layouts.
It features a guard ring structure for enhanced dv/dt immunity (10,000 V/µs), meets JESD201 Class 2 whisker resistance, and uses pure tin-plated leads compliant with J-STD-002 solderability standards - confirming suitability for automotive and industrial reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 36–48 V nominal systems. |
| IF | 8 A - Continuous average forward current; supports sustained power delivery in compact 12–24 V DC/DC stages. |
| VF @ 8A, 25°C | 0.55 V - Low conduction loss enabling >92% efficiency in high-frequency buck converters. |
| IFSM | 150 A - Non-repetitive surge rating; withstands inrush and fault transients without failure. |
| TJ max | 125°C - Maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| RθJA | 40°C/W - Thermal resistance from junction to ambient; determines heatsink-free power handling up to ~2 W at TA = 70°C. |
| IR @ 40V, 25°C | 500 µA - Reverse leakage level; ensures minimal standby loss in always-on power rails. |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; two-terminal device (anode and cathode) in standard through-hole outline per JEDEC DO-201AD specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to source-side of switching node; must handle full load current and transient surges. |
| Cathode | Output current exit point | Connected to output capacitor and load; polarity marked by visible cathode band on body. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power electronics including engine control modules and ADAS power supplies. |
| Guard ring structure | Enables stable reverse breakdown behavior and improves reliability under voltage transients >10 kV/µs. |
| Low VF (0.55 V) | Reduces conduction losses by ~30% vs. comparable 40 V Si diodes, directly improving thermal margin. |
| Pure tin plating | Ensures robust solder joint integrity and eliminates whisker risk in long-life industrial deployments. |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for enclosed power adapters and safety-critical enclosures. |
Applications
| Automotive DC/DC Converters | Industrial SMPS |
|---|---|
Use Scenario: Step-down conversion from 42 V battery rail to 5 V/3.3 V logic supplies in vehicle infotainment and body control units. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology, conducting during secondary-side switch-off interval. Use Value: 0.55 V VF minimizes heat generation in sealed enclosures; AEC-Q101 qualification ensures compliance with automotive reliability standards. | Use Scenario: Secondary-side rectification in open-frame 200–500 W telecom and industrial AC/DC power supplies. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output after transformer isolation and filtering. Use Value: 150 A IFSM rating handles startup surges without degradation; DO-201AD footprint allows direct replacement of legacy rectifiers. |
| USB-C PD Adapters | LED Driver Power Stages |
Use Scenario: High-efficiency secondary rectification in compact 65–100 W USB-C power delivery adapters. IC Role / Device Role / Timing Role: Fast-recovery rectifier synchronized with primary-side controller timing to reduce switching losses. Use Value: Low 40 V VRRM matches common 20–36 V secondary bus voltages; 500 µA IR limits no-load power consumption. | Use Scenario: Constant-current regulation stage in outdoor LED streetlight drivers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Main output rectifier in isolated buck-boost or SEPIC-derived topologies driving 36–72 V LED strings. Use Value: 125°C TJ max enables operation at 85°C ambient without derating; UL 94V-0 compound enhances fire safety in outdoor enclosures. |
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-8EWH04FN-M3/45 | Same 40 V VRRM, 8 A IF, but TO-277 surface-mount package; VF = 0.54 V at 8 A. | Requires SMT reflow and PCB layout change; unsuitable for through-hole legacy designs. | Select when board space is constrained and automated assembly is available. |
| ON Semiconductor SB840-E3/45 | 40 V VRRM, 8 A IF, DO-201AD package, VF = 0.57 V at 8 A; not AEC-Q101 qualified. | Lacks automotive qualification; acceptable for commercial/industrial use only. | Choose for cost-sensitive non-automotive applications where AEC-Q101 is not mandated. |
Compared with VS-8EWH04FN-M3/45 and SB840-E3/45, the SR804 uniquely combines DO-201AD through-hole compatibility, AEC-Q101 qualification, and 0.55 V VF - making it the preferred choice for automotive retrofit and industrial field-serviceable power supplies requiring proven reliability and drop-in mechanical fit.
Availability
SR804 is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS, and USB-C PD adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SR804 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 SR802–SR820 series was developed specifically for high-reliability, medium-current Schottky rectification in harsh-environment power conversion - emphasizing AEC-Q101 compliance, low VF, and robust thermal performance in DO-201AD packaging.
FAQ
What is the maximum junction temperature rating for the SR804?
The SR804 has a maximum junction temperature (TJ max) of 125°C, verified per its absolute maximum ratings table. This rating applies under continuous operation with proper thermal management and allows reliable use in automotive under-hood environments where ambient temperatures reach 85°C. The SR804 datasheet specifies derating curves starting at 25°C ambient, and the device maintains rated 8 A forward current up to this 125°C limit.
Is the SR804 AEC-Q101 qualified?
Yes, the SR804 is AEC-Q101 qualified - confirmed in the FEATURES section of the official Taiwan Semiconductor documentation. This qualification covers stress tests including HTGB, HTRB, TCT, and ESD, validating its suitability for automotive power electronics. Note that only variants marked with "H" suffix (e.g., SR804H) carry formal AEC-Q101 certification; standard SR804 is listed as "AEC-Q101 qualified available", meaning qualification is offered for the SR804 base design.
What is the forward voltage drop of the SR804 at rated current?
The SR804 exhibits a typical forward voltage (VF) of 0.55 V at 8 A and 25°C, as specified in the ELECTRICAL SPECIFICATIONS table. This value is measured under pulse conditions (PW = 0.3 ms) and represents the conduction loss under nominal load. At elevated junction temperatures (e.g., 100°C), VF decreases slightly, contributing to stable thermal behavior in high-power-density designs.
Which package does the SR804 use, and what are its mechanical identifiers?
The SR804 uses the DO-201AD axial-leaded package, confirmed in MECHANICAL DATA and PACKAGE OUTLINE DIMENSIONS sections. Key identifiers include cathode band marking, pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and approximate weight of 1.10 g. Its lead spacing and body dimensions conform to JEDEC standard DO-201AD outlines.
What is the repetitive peak reverse voltage (VRRM) of the SR804?
The SR804 has a repetitive peak reverse voltage (VRRM) of 40 V, explicitly listed in the ABSOLUTE MAXIMUM RATINGS table under the SR804 column. This value defines the maximum allowable reverse-biased voltage the device can block continuously without breakdown, and aligns with its position in the SR802–SR820 family (SR802 = 20 V, SR803 = 30 V, SR804 = 40 V, etc.).
SR804 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 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:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 125°C
SR804 FAQ
1.How can I place an order for SR804 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR804 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 SR804 reliable?
The price and inventory of SR804 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR804 is usually 5 days.
3.What payment methods are accepted for SR804?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR804 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR804?
SR804 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR804 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 SR804?
For technical support, including SR804 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR804 requirements.
6.How does Aetrix verify that SR804 is sourced from the original manufacturer or authorized distributors?
All SR804 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 SR804 meets industry standards.
7.What is the process for return or replacement of SR804?
All SR804 units undergo pre-shipment inspection (PSI). If there is an issue with SR804, 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 SR804 part is unused and in its original packaging.
Return procedure for SR804:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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