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Taiwan Semiconductor Corporation SR305 A0G
- Part No.:
- SR305 A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR305 A0G.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
SR305 A0G from Taiwan Semiconductor is a 3A, 50V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.70 V max at 3A, 25°C), high surge current capability (80 A), and junction temperature rating up to +150°C. It serves as a primary output rectifier in compact DC/DC converters and AC/DC adapters where efficiency and thermal robustness are critical.
For engineers reviewing the SR305 A0G datasheet, SR305 A0G pinout, SR305 A0G application, or SR305 A0G equivalent, key selection factors include its 50 V repetitive peak reverse voltage, 5 mA reverse leakage at 100°C, 15 °C/W junction-to-case thermal resistance, and AEC-Q101 qualification availability (via SR305H variant).
Technical Context
This device uses a single-die Schottky structure with guard ring overvoltage protection, enabling fast switching and low conduction loss. Its 10,000 V/µs critical rate of rise of off-state voltage supports stable operation in high-dV/dt SMPS environments.
The DO-201AD package provides 50 °C/W junction-to-ambient thermal resistance under standard PCB mounting, and pure tin-plated leads ensure reliable solderability per J-STD-002. Polarity is marked by cathode band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 48 V-output or 36 V-input DC/DC stages |
| IF | 3 A continuous - Rated average forward current; supports sustained 36–60 W power delivery with appropriate heatsinking |
| VF (max) | 0.70 V @ 3 A, 25°C - Low conduction loss reduces heat generation and improves system efficiency vs. PN diodes |
| IFSM | 80 A @ 8.3 ms - Withstands inrush and transient surges common during cold-start or load dump events |
| IR (max) | 500 µA @ 25°C; 5 mA @ 100°C - Low leakage preserves standby power budget and enables stable biasing in precision circuits |
| TJ max | +150°C - Enables operation in high-ambient industrial or automotive under-hood environments |
| RθJC | 15 °C/W - Allows direct thermal path to heatsink or copper pour for high-power density designs |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by band; leads are pure tin-plated and solderable per J-STD-002. Weight ≈ 1.10 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return) in buck or flyback secondary |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail; polarity marking prevents incorrect placement in high-current paths |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage without external snubbers in 60 Hz line-frequency or 100 kHz SMPS applications |
| RoHS & halogen-free | Complies with IEC 61249-2-21; eliminates brominated flame retardants for safer rework and end-of-life processing |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, ensuring long-term reliability in automotive and industrial control modules |
| UL 94V-0 molding compound | Self-extinguishing encapsulation meets safety standards for enclosed power supplies and medical-grade adapters |
Applications
| Server Power Supply Rectification | USB-C PD Adapter Output Stage |
|---|---|
Use Scenario: Secondary-side rectification in 65 W server auxiliary power rails with tight thermal constraints. IC Role / Device Role / Timing Role: Schottky rectifier replacing synchronous MOSFETs where gate drive complexity must be avoided. Use Value: 0.70 V VF minimizes conduction loss at 3 A, reducing heatsink size by ~30% versus 1.1 V Si diodes. | Use Scenario: +20 V output rectification in compact 45–65 W USB-C PD wall adapters. IC Role / Device Role / Timing Role: Unidirectional current path with fast recovery and low EMI generation. Use Value: 80 A IFSM handles repeated plug-in surges; DO-201AD fits automated axial insertion lines. |
| Industrial PLC Power Input | Automotive Body Control Module (BCM) |
Use Scenario: 24 V DC input rectification and reverse polarity protection in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Polarity-sensitive front-end protection diode with high surge tolerance. Use Value: +150°C TJ max ensures operation at 85°C ambient with 20 K margin; cathode band enables visual assembly verification. | Use Scenario: 12 V battery-fed subsystem rectification in BCMs exposed to load dump transients. IC Role / Device Role / Timing Role: Reverse-battery protection and supply rail clamping element. Use Value: Guard ring withstands >100 V transients; AEC-Q101 qualified variants (SR305H) support functional safety requirements. |
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-3EJH05-M3/5BT | Same DO-201AD package, 3 A / 50 V, VF = 0.72 V max, IR = 400 µA @ 25°C, no AEC-Q101 option | Identical electrical envelope but lacks automotive qualification path | Select when cost sensitivity outweighs AEC-Q101 requirement and leakage < 400 µA is acceptable |
| ON Semiconductor SB350-E3/54 | DO-201AD, 3 A / 50 V, VF = 0.75 V max, IR = 1 mA @ 125°C, RoHS compliant but not halogen-free | Higher VF increases conduction loss; wider leakage spec affects high-temp standby performance | Choose for legacy design continuity where halogen-free compliance is not mandated |
Compared with SR305 A0G, VS-3EJH05-M3/5BT offers tighter leakage control but no automotive qualification, while SB350-E3/54 trades higher forward drop and broader leakage for broad distributor availability-making SR305 A0G optimal for thermally constrained, halogen-free, or AEC-Q101-targeted designs.
Availability
SR305 A0G is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial PLC power inputs, and automotive body control modules requiring stable component supply, consistent lead finish, and traceable lot-level documentation.
Supply support for SR305 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 global power, automotive, and industrial markets since 1979.
The SR302–SR320 series was developed to deliver high-reliability, low-VF Schottky rectifiers for space-constrained, thermally demanding power conversion stages in consumer, industrial, and automotive applications.
FAQ
What is the maximum junction temperature rating for SR305 A0G?
The SR305 A0G has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version J2105). This allows reliable operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations when thermal design accounts for RθJC = 15 °C/W.
Does SR305 A0G meet AEC-Q101 qualification?
No-SR305 A0G is not AEC-Q101 qualified. The "A0G" suffix denotes 500-piece ammo box packaging in DO-201AD. AEC-Q101 qualification is available only on the SR305H variant (tape-and-reel) per ordering information table in the datasheet. Engineers requiring automotive qualification must specify SR305H instead of SR305 A0G.
What is the forward voltage of SR305 A0G at 3 A and 100°C junction temperature?
The datasheet specifies VF only at TJ = 25°C (max 0.70 V). While no exact VF value is given at 100°C, Figure 4 (Typical Forward Characteristics) shows SR305–SR306 curves indicating ~0.62 V at 3 A and 100°C. This reduction reflects negative temperature coefficient behavior typical of Schottky diodes.
Is SR305 A0G halogen-free and RoHS compliant?
Yes-SR305 A0G is both RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the FEATURES section of the Taiwan Semiconductor datasheet (Version J2105). The molding compound contains no brominated or chlorinated flame retardants, supporting environmentally regulated end markets including EU medical and industrial equipment.
What does the "A0G" suffix mean in SR305 A0G?
The "A0G" suffix in SR305 A0G indicates 500-piece ammo box packaging (not tape-and-reel) in the DO-201AD package. Per the ORDERING INFORMATION table, "A0G" applies to all SR3x variants and denotes green compound (halogen-free), standard lead finish, and bulk packaging-distinct from "H" (AEC-Q101) or "HA0G" (AEC-Q101 + ammo box) variants.
SR305 A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR305 A0G FAQ
1.How can I place an order for SR305 A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR305 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 SR305 A0G reliable?
The price and inventory of SR305 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR305 A0G is usually 5 days.
3.What payment methods are accepted for SR305 A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR305 A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR305 A0G?
SR305 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR305 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 SR305 A0G?
For technical support, including SR305 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR305 A0G requirements.
6.How does Aetrix verify that SR305 A0G is sourced from the original manufacturer or authorized distributors?
All SR305 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 SR305 A0G meets industry standards.
7.What is the process for return or replacement of SR305 A0G?
All SR305 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SR305 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 SR305 A0G part is unused and in its original packaging.
Return procedure for SR305 A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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