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Taiwan Semiconductor Corporation SR104 A0G
- Part No.:
- SR104 A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR104 A0G.pdf
- Description:
- DIODE SCHOTTKY 40V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:12,665
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Product details
Overview
SR104 A0G from Taiwan Semiconductor is a 1A, 40V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring low forward voltage drop (0.55 V at 1 A, 25°C), high surge current capability (30 A), and junction temperature rating up to +125°C. It serves as a primary output rectifier in compact DC/DC converters and AC/DC adapters.
For engineers reviewing the SR104 A0G datasheet, SR104 A0G pinout, SR104 A0G application, or SR104 A0G equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 500 µA max reverse leakage at 25°C, thermal resistance of 90°C/W, AEC-Q101 qualification availability (via H-suffix variants), and DO-41 mechanical compatibility with standard through-hole layouts.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring structure for overvoltage protection and meets JESD201 Class 2 whisker resistance. Its low VF enables high-efficiency operation in space-constrained power stages where thermal dissipation is critical.
The device operates across –55°C to +125°C junction range, supports 8.3 ms non-repetitive surge currents up to 30 A, and exhibits dv/dt capability of 10,000 V/µs - enabling reliable performance in fast-switching SMPS topologies without snubber networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking voltage; defines safe operating limit in flyback or buck output stage |
| IF | 1 A continuous - Rated average forward current; determines steady-state conduction capacity |
| VF @ 1A, 25°C | 0.55 V - Low conduction loss reduces heat generation and improves system efficiency |
| IR @ 40V, 25°C | 500 µA - Low leakage preserves standby power budget in energy-sensitive designs |
| IFSM | 30 A - Withstands inrush and transient surges without degradation |
| RθJA | 90 °C/W - Thermal resistance informs heatsinking requirements for 1A operation at ambient |
| TJ max | +125 °C - Maximum junction temperature; sets derating boundary for high-temperature environments |
Pinout & Package
DO-204AL (DO-41) package with axial leads: cathode indicated by band; pure tin-plated leads compliant with J-STD-002 solderability and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck, secondary winding in flyback) |
| Cathode | Forward current exit point | Connected to output rail; polarity band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external clamping |
| Low VF (0.55 V) | Reduces conduction loss by ~30% vs. comparable 1A Si diodes, lowering thermal load |
| AEC-Q101 qualified option | Enables use in automotive infotainment and body electronics where reliability validation is mandatory |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and environmental compliance requirements for global manufacturing |
| J-STD-002 solderable leads | Ensures robust wetting and joint integrity during wave or hand soldering processes |
Applications
| USB-C Power Adapter Output Rectification | Industrial PLC DC/DC Auxiliary Supply |
|---|---|
Use Scenario: 5–20 V output stage in compact 30 W USB-C PD adapter with 100 kHz–1 MHz switching frequency. IC Role / Device Role / Timing Role: Primary unidirectional power converter output rectifier replacing conventional PN diodes. Use Value: 0.55 V VF minimizes conduction loss at 1 A load, enabling >92% efficiency and eliminating need for heatsink in 12 mm height constraint. | Use Scenario: 5 V/1 A auxiliary rail in DIN-rail mounted programmable logic controller with wide ambient range (−40°C to +70°C). IC Role / Device Role / Timing Role: Input-side rectifier feeding linear regulator or buck controller from 12–24 VAC input. Use Value: 125°C TJ rating and 500 µA IR at 25°C ensure stable operation under sustained load and elevated ambient without derating. |
| Set-Top Box Standby Power Supply | Smart Home Hub AC/DC Conversion |
Use Scenario: 3.3 V standby rail in cable/satellite receiver with <300 mW no-load consumption requirement. IC Role / Device Role / Timing Role: Secondary-side rectifier in quasi-resonant flyback supplying always-on microcontroller and memory. Use Value: Low 500 µA reverse leakage at 25°C directly contributes to sub-100 mW no-load power, meeting Energy Star Tier 2 limits. | Use Scenario: 5 V main rail in Wi-Fi/Zigbee hub powered from universal 100–240 VAC input. IC Role / Device Role / Timing Role: Output rectifier in high-frequency flyback converter operating at 65 kHz with synchronous rectification not implemented. Use Value: 30 A IFSM withstands repeated cold-start surges from bulk capacitor charging, improving field reliability over 5-year lifecycle. |
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-1EQH04-M3/5BT | Same DO-41 package, 40 V VRRM, but VF = 0.52 V (typ) at 1 A; 150°C TJ max | Higher temperature rating allows operation in sealed enclosures above 70°C ambient | Select when extended thermal margin is required and 0.03 V VF reduction justifies sourcing change |
| ON Semiconductor SB140-TB | DO-41, 40 V VRRM, VF = 0.54 V (max) at 1 A; IR = 500 µA (max) at 25°C; same RθJA | Identical electrical envelope and thermal behavior; fully interchangeable in legacy designs | Preferred for second-source assurance where footprint and BOM alignment are critical |
Compared with SR104 A0G, VS-1EQH04-M3/5BT offers higher junction temperature tolerance (+150°C) and marginally lower VF, while SB140-TB matches all key parameters exactly - making it ideal for drop-in replacement where supply chain diversification is needed without design revalidation.
Availability
SR104 A0G is available at Aetrix Electronics and suitable for USB-C adapters, industrial PLC auxiliary supplies, and smart home AC/DC conversion requiring stable component supply, consistent DO-41 form factor, and long-term production continuity.
Supply support for SR104 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, serving industrial, computing, and consumer markets since 1979.
The SR102–SR115 series was designed specifically for cost-sensitive, high-volume power conversion applications demanding reliable Schottky performance in standard through-hole packages - emphasizing manufacturability, thermal robustness, and regulatory compliance.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the SR104 A0G?
The SR104 A0G has a VRRM of 40 V, meaning it can safely block up to 40 V of reverse voltage in repetitive operation. This rating is verified per JEDEC test conditions and defines the upper limit for use in circuits such as 24 V output flybacks or 36 V DC/DC inputs. Exceeding this voltage risks avalanche breakdown and permanent damage to the SR104 A0G.
Does the SR104 A0G have AEC-Q101 qualification?
The SR104 A0G itself is not AEC-Q101 qualified; however, the SR104H and SR104HA0G variants are explicitly qualified per AEC-Q101. The "H" suffix denotes automotive-grade testing including stress life, temperature cycling, and ESD. For automotive applications, specify SR104H or SR104HA0G - the SR104 A0G remains suitable for industrial and consumer use where qualification is not mandated.
What is the forward voltage (VF) of the SR104 A0G at 1 A and 25°C?
The SR104 A0G has a typical forward voltage of 0.55 V at 1 A and 25°C, measured under pulsed conditions (PW = 0.3 ms). This value is confirmed in the Electrical Specifications table of the G2104 datasheet. At higher temperatures (e.g., 100°C), VF decreases slightly, while conduction loss remains significantly lower than equivalent silicon diodes.
How does the SR104 A0G compare to the SR105 A0G in terms of reverse voltage rating?
The SR104 A0G has a VRRM of 40 V, whereas the SR105 A0G is rated for 50 V. Both share identical package (DO-41), forward current (1 A), and thermal specs, but differ only in blocking voltage. Substituting SR105 A0G for SR104 A0G is electrically safe if the circuit's reverse stress stays ≤50 V, though it may incur slightly higher VF (0.70 V typ) and reduced efficiency in 40 V-class designs.
What packaging options are available for the SR104 A0G?
The SR104 A0G is supplied in 3,000-piece ammo boxes, as indicated by the "A0G" suffix in the ordering code. It is not offered in tape-and-reel format - that configuration uses the base code "SR104" or "SR104H". The DO-41 package is axial-leaded and compatible with standard through-hole assembly processes, including wave soldering per J-STD-002.
SR104 A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 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-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SR104 A0G FAQ
1.How can I place an order for SR104 A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR104 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 SR104 A0G reliable?
The price and inventory of SR104 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR104 A0G is usually 5 days.
3.What payment methods are accepted for SR104 A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR104 A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR104 A0G?
SR104 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR104 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 SR104 A0G?
For technical support, including SR104 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR104 A0G requirements.
6.How does Aetrix verify that SR104 A0G is sourced from the original manufacturer or authorized distributors?
All SR104 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 SR104 A0G meets industry standards.
7.What is the process for return or replacement of SR104 A0G?
All SR104 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SR104 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 SR104 A0G part is unused and in its original packaging.
Return procedure for SR104 A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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