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Taiwan Semiconductor Corporation SR305HR0G
- Part No.:
- SR305HR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR305HR0G.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:8,070
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Product details
Overview
SR305HR0G from Taiwan Semiconductor is a 3A, 50V AEC-Q101-qualified Schottky barrier rectifier in DO-201AD package, featuring 0.70V max forward voltage at 3A/25°C, 80A surge capability, and 500µA max reverse leakage at 25°C. It serves as primary output rectifier in automotive-grade DC-DC converters and industrial SMPS.
For engineers reviewing the SR305HR0G datasheet, SR305HR0G pinout, SR305HR0G application, or SR305HR0G equivalent, this page delivers verified electrical specs, thermal performance data, AEC-Q101 qualification status, DO-201AD mechanical dimensions, and direct alternative part comparisons for automotive power supply design.
Technical Context
This device uses a single-die Schottky junction optimized for low VF and high IFSM, with guard ring structure enabling robust dv/dt immunity (10,000 V/µs). Its 125°C maximum junction temperature rating and 50°C/W RθJA support operation in thermally constrained automotive under-hood environments.
The SR305HR0G is rated for 50V repetitive peak reverse voltage (VRRM), 35V RMS reverse voltage, and exhibits 15°C/W junction-to-case thermal resistance - critical for heatsink-limited board-level thermal management in compact adapters and converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum blocking voltage before avalanche; defines safe operating range in 24V automotive systems |
| IF | 3 A - Continuous DC forward current; supports mid-power converter outputs without derating at 75°C ambient |
| VF (max) | 0.70 V @ 3A, 25°C - Low conduction loss enables >92% efficiency in 12V→5V buck converters |
| IFSM | 80 A - Peak non-repetitive surge withstand; handles cold-start inrush in vehicle battery-fed supplies |
| IR (max) | 500 µA @ 50V, 25°C - Minimal leakage preserves standby power budget in always-on modules |
| RθJA | 50 °C/W - Thermal resistance to ambient; requires ≤2.5W dissipation for <125°C junction temp at 70°C board temp |
| TJ max | 125 °C - Maximum junction temperature; qualified per AEC-Q101 for automotive under-hood use |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction path | Connected to unregulated input rail; must handle full 3A DC + ripple current |
| Cathode | Output terminal for forward conduction path | Connected to output filter capacitor; polarity marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power rails |
| Guard ring overvoltage protection | Enables stable operation during load dump transients up to 10,000 V/µs dv/dt stress |
| Halogen-free construction | Complies with IEC 61249-2-21; eliminates corrosive outgassing in sealed enclosures |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in high-density power assemblies |
Applications
| Automotive DC-DC Converter | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: 12V–48V bidirectional DC-DC stage in 48V mild hybrid vehicles. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 3A load with transient surges up to 80A. Use Value: 0.70V VF minimizes conduction loss at 48V bus, improving system efficiency by ≥1.8% vs. standard silicon diodes. | Use Scenario: Output stage of 24V industrial switch-mode power supply powering PLC I/O modules. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectified flyback topology. Use Value: 500µA IR at 25°C ensures <10mW standby loss, meeting Energy Star Level VI requirements. |
| USB-C PD Adapter Output | Telecom Power Shelf Rectification |
Use Scenario: 20V output rectification in compact 65W USB-C PD wall adapters. IC Role / Device Role / Timing Role: Secondary-side Schottky rectifier replacing synchronous MOSFET in cost-sensitive designs. Use Value: DO-201AD package allows manual rework and automated placement; 1.10g weight suits lightweight portable designs. | Use Scenario: -48V telecom power shelf output rectification with redundant parallel paths. IC Role / Device Role / Timing Role: Standby rectifier maintaining bias supply during main converter fault conditions. Use Value: 125°C TJ max and 50°C/W RθJA enable reliable operation at 75°C ambient in enclosed rack environments. |
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-3EY50-M3/54 | Same DO-201AD package, 3A/50V rating, but VF = 0.72V (max) and IR = 1.0mA @ 25°C | Higher leakage limits use in ultra-low-power standby circuits | Prefer SR305HR0G where <500µA IR is required at 25°C |
| ON Semiconductor SB350 | DO-201AD, 3A/50V, VF = 0.75V (max), no AEC-Q101 qualification, RθJA = 55°C/W | Not qualified for automotive; lower thermal performance limits power density | Select SR305HR0G for AEC-Q101 compliance and tighter thermal resistance |
Compared with VS-3EY50-M3/54 and SB350, the SR305HR0G delivers lower reverse leakage and certified automotive reliability, while maintaining identical footprint and mounting compatibility - enabling drop-in replacement in AEC-Q101-compliant designs without layout change.
Availability
SR305HR0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS, and USB-C PD adapters requiring stable component supply with AEC-Q101 assurance and consistent DO-201AD packaging.
Supply support for SR305HR0G 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 devices, and MOSFETs since 1979.
The SR302–SR320 family was designed specifically for high-reliability automotive and industrial power conversion, emphasizing AEC-Q101 qualification, low VF stability across temperature, and robust surge immunity in compact axial packages.
FAQ
What is the maximum junction temperature rating for SR305HR0G?
The SR305HR0G has a maximum junction temperature (TJ max) of 125°C, validated under AEC-Q101 stress testing. This rating applies across its full operating voltage range and supports use in under-hood automotive environments where ambient temperatures reach 85°C. The SR305HR0G maintains specified electrical parameters within this limit when thermal design respects its 50°C/W RθJA.
Is SR305HR0G pin-compatible with other parts in the SR302–SR320 series?
Yes, all SR302–SR320 devices share identical DO-201AD package dimensions and anode/cathode pinout. The SR305HR0G uses the same axial lead configuration and cathode band marking as SR302HR0G through SR320HR0G, enabling direct PCB footprint reuse across the voltage range from 20V to 200V.
Does SR305HR0G meet halogen-free and RoHS requirements?
Yes, the SR305HR0G complies with both RoHS Directive 2011/65/EU and IEC 61249-2-21 halogen-free standards. Its molding compound contains no brominated flame retardants, chlorine, or fluorine above threshold limits, and lead-free tin plating meets J-STD-002 solderability requirements.
What is the forward voltage specification for SR305HR0G at elevated temperature?
Per the datasheet, the SR305HR0G has a typical VF of ~0.62V at 3A and 100°C, with no maximum value specified above 25°C. The 0.70V maximum applies only at 25°C; actual VF decreases with rising junction temperature due to Schottky diode physics, supporting stable operation up to 125°C TJ.
How is AEC-Q101 qualification reflected in the SR305HR0G ordering code?
The "H" suffix in SR305HR0G explicitly denotes AEC-Q101 qualification per the manufacturer's ordering information table. This distinguishes it from non-automotive variants like SR305R0G (no "H") and confirms full qualification including temperature cycling, humidity bias HAST, and ESD testing per AEC-Q101 Rev D.
SR305HR0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR305HR0G FAQ
1.How can I place an order for SR305HR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR305HR0G 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 SR305HR0G reliable?
The price and inventory of SR305HR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR305HR0G is usually 5 days.
3.What payment methods are accepted for SR305HR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR305HR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR305HR0G?
SR305HR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR305HR0G 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 SR305HR0G?
For technical support, including SR305HR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR305HR0G requirements.
6.How does Aetrix verify that SR305HR0G is sourced from the original manufacturer or authorized distributors?
All SR305HR0G 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 SR305HR0G meets industry standards.
7.What is the process for return or replacement of SR305HR0G?
All SR305HR0G units undergo pre-shipment inspection (PSI). If there is an issue with SR305HR0G, 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 SR305HR0G part is unused and in its original packaging.
Return procedure for SR305HR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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