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Taiwan Semiconductor Corporation SR304 A0G
- Part No.:
- SR304 A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR304 A0G.pdf
- Description:
- DIODE SCHOTTKY 40V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:315
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Product details
Overview
SR304 A0G from Taiwan Semiconductor is a 3A, 40V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.55 V at 3 A, 25°C), high surge current capability (80 A), and junction temperature rating up to +125°C. It serves as a primary output rectifier in compact AC/DC adapters and DC/DC converters where efficiency and thermal robustness are critical.
For engineers reviewing the SR304 A0G datasheet, SR304 A0G pinout, SR304 A0G application, or SR304 A0G equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 500 µA max reverse leakage at 25°C, AEC-Q101 qualification option (via H-suffix variants), RoHS/halogen-free compliance, and DO-201AD mechanical compatibility with standard through-hole reflow and wave soldering processes.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring technology to enhance overvoltage ruggedness and suppress avalanche-induced failure. Its low VF and 15 °C/W junction-to-case thermal resistance enable efficient power conversion in space-constrained 3–5 W SMPS designs.
The device operates across –55°C to +125°C junction range, supports 10,000 V/µs critical dv/dt, and maintains <500 µA reverse leakage up to rated 40 V VR at room temperature-critical for standby power compliance in energy-efficient adapters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in secondary-side rectification circuits |
| IF | 3 A - Continuous average forward current; supports sustained 3.6–5 W output power at typical 12 V output with margin |
| VF @ 3 A, 25°C | 0.55 V - Low conduction loss reduces heat generation and improves system efficiency by ~0.5–1.2% vs. higher-VF alternatives |
| IFSM | 80 A - Non-repetitive surge rating; withstands inrush currents during cold-start of 5 W adapters without degradation |
| IR @ 40 V, 25°C | 500 µA - Low leakage preserves no-load input power budget in Energy Star-compliant wall adapters |
| TJ max | 125°C - Enables operation in sealed enclosures with limited airflow, such as USB-C PD chargers |
| RθJC | 15 °C/W - Enables direct heatsinking via PCB copper pour or chassis contact for thermal management in high-density layouts |
Pinout & Package
DO-201AD package: axial-leaded, molded plastic case with cathode band marking; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to transformer secondary or switching node; must route with low-inductance trace to minimize ringing |
| Cathode (lead with band) | Forward current exit / reverse voltage reference | Connected to output capacitor ground; polarity misalignment causes immediate short-circuit failure |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves voltage standoff margin and prevents edge breakdown under transient overvoltage conditions common in flyback topologies |
| Low VF (0.55 V) | Reduces conduction loss by ≥15% vs. comparable 40 V Si diodes, directly lowering thermal stress on PCB copper |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental compliance requirements for consumer and industrial end equipment |
| 80 A IFSM rating | Supports reliable cold-start behavior in 5 W adapters with high-capacitance output filters without derating |
Applications
| USB-C Wall Adapter | Industrial DC/DC Module |
|---|---|
Use Scenario: 5 V/3 A output stage in compact 15 mm × 15 mm USB-C PD adapter with flyback topology. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC; operates at 65–100 kHz switching frequency. Use Value: 0.55 V VF minimizes conduction loss, enabling >89% efficiency at full load while maintaining <55°C case temperature without heatsink. | Use Scenario: 12 V/2.5 A isolated auxiliary rail in programmable logic controller (PLC) power supply. IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in forward-converter-derived auxiliary supply; handles continuous 3 A load with 10% duty-cycle surges. Use Value: 125°C TJ rating and 500 µA IR ensure stable operation across –40°C to +70°C ambient with no derating required. |
| Automotive Infotainment Power | LED Driver Secondary Rectification |
Use Scenario: 5 V standby rail in automotive head-unit power management unit (PMU), powered from 12 V battery via isolated flyback. IC Role / Device Role / Timing Role: Low-leakage output rectifier meeting AEC-Q101 stress test requirements when used in SR304H variant; cathode tied to isolated 5 V ground. Use Value: 500 µA IR at 25°C and <10 mA IR at 100°C prevent excessive quiescent current draw during vehicle sleep mode. | Use Scenario: Output rectifier in constant-current LED driver for commercial signage (24 V, 0.7 A). IC Role / Device Role / Timing Role: High-efficiency rectifier in quasi-resonant flyback delivering ripple-free DC to LED string; operates at 60 kHz. Use Value: Guard ring design suppresses voltage spikes during MOSFET turn-off, eliminating need for external snubber and reducing BOM count. |
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-3EYH04-M3/54 | Same DO-201AD package, 40 V VRRM, but VF = 0.57 V (max) at 3 A; RθJA = 55 °C/W vs. TSC's 50 °C/W | Slightly higher thermal resistance requires larger copper area for same power dissipation | Preferred where Vishay supply chain alignment or dual-sourcing is mandated |
| ON Semiconductor SB340-E3/54 | 40 V VRRM, VF = 0.54 V (typ), but IR = 1.0 mA (max) at 40 V/25°C - double TSC's 500 µA spec | Higher leakage may impact no-load power in ultra-low-power adapters | Acceptable for non-energy-regulated industrial supplies where leakage sensitivity is low |
Compared with VS-3EYH04-M3/54 and SB340-E3/54, SR304 A0G delivers tighter reverse leakage control and lower thermal resistance-advantageous for compact, thermally constrained, and energy-certified designs-while maintaining identical DO-201AD footprint and assembly compatibility.
Availability
SR304 A0G is available at Aetrix Electronics and suitable for USB-C adapters, industrial DC/DC modules, automotive infotainment power rails, and LED driver secondary rectification requiring stable component supply, consistent lead-time performance, and full traceability.
Supply support for SR304 A0G 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 rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.
The SR302–SR320 series was developed to deliver high-reliability, cost-optimized Schottky rectifiers for mainstream AC/DC and DC/DC power conversion, with emphasis on low VF, robust surge handling, and environmental compliance.
FAQ
What is the maximum junction temperature rating for SR304 A0G?
The SR304 A0G has a maximum junction temperature (TJ max) of +125°C. This rating applies under continuous DC forward current conditions and allows operation in sealed or convection-limited environments typical of compact wall adapters. Derating begins above 25°C ambient per the forward current derating curve in the datasheet, with 3 A rated up to 75°C ambient in free-air conditions.
Does SR304 A0G meet AEC-Q101 reliability standards?
The SR304 A0G itself is not AEC-Q101 qualified; however, the SR304H variant (same electrical specs, marked "H") is explicitly qualified per AEC-Q101. For automotive infotainment or body-control applications requiring stress-tested components, SR304H should be selected instead of SR304 A0G, as the latter lacks the required qualification documentation and test reports.
What is the reverse leakage current specification for SR304 A0G at 40 V and 100°C?
At 40 V reverse voltage and 100°C junction temperature, the SR304 A0G exhibits a maximum reverse leakage current (IR) of 10 mA. This value is confirmed in the Electrical Specifications table and is critical for evaluating standby power consumption in energy-efficient adapters operating at elevated temperatures.
Can SR304 A0G be used in surface-mount designs?
No - SR304 A0G uses the DO-201AD axial-leaded package and is intended for through-hole mounting only. It is not compatible with SMT reflow profiles or pick-and-place equipment. For surface-mount equivalents, consider TSC's SMB/SMA-packaged SR series (e.g., SR304-T) or alternative manufacturers' SOD-123 or SMA packages with matching 40 V/3 A ratings.
What does the "A0G" suffix indicate in SR304 A0G?
The "A0G" suffix denotes packaging and environmental compliance: "A0" specifies ammo box packaging (500 units per box), and "G" indicates halogen-free molding compound compliant with IEC 61249-2-21. It does not imply AEC-Q101 qualification - that requires the "H" suffix (e.g., SR304H).
SR304 A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 3 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 ~ 150°C
SR304 A0G FAQ
1.How can I place an order for SR304 A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR304 A0G 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 SR304 A0G reliable?
The price and inventory of SR304 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR304 A0G is usually 5 days.
3.What payment methods are accepted for SR304 A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR304 A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR304 A0G?
SR304 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR304 A0G 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 SR304 A0G?
For technical support, including SR304 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR304 A0G requirements.
6.How does Aetrix verify that SR304 A0G is sourced from the original manufacturer or authorized distributors?
All SR304 A0G 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 SR304 A0G meets industry standards.
7.What is the process for return or replacement of SR304 A0G?
All SR304 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SR304 A0G, 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 SR304 A0G part is unused and in its original packaging.
Return procedure for SR304 A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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