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Taiwan Semiconductor Corporation SR105 R0G
- Part No.:
- SR105 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR105 R0G.pdf
- Description:
- DIODE SCHOTTKY 50V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,040
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Product details
Overview
SR105 R0G from Taiwan Semiconductor is a 1 A, 50 V Schottky barrier rectifier in DO-41 package, featuring low forward voltage (0.70 V @ 1 A, 25°C), high surge current capability (30 A), and AEC-Q101 qualification for automotive-grade reliability in power conversion circuits.
For engineers reviewing the SR105 R0G datasheet, SR105 R0G pinout, SR105 R0G application, or SR105 R0G equivalent, this page delivers verified electrical parameters, thermal performance data, mechanical dimensions, and real-world use context for SMPS, DC-DC converters, and adapter designs requiring efficient unidirectional conduction at ≤50 V reverse blocking.
Technical Context
This discrete Schottky diode operates as a unidirectional power rectifier with single-die construction and guard ring structure for overvoltage protection. Its 50 V repetitive peak reverse voltage (VRRM) and 30 A non-repetitive surge rating support transient-heavy switching topologies.
Thermal resistance is 90 °C/W (junction-to-ambient), and maximum junction temperature is rated at +150 °C - enabling stable operation in compact, convection-cooled power supplies where thermal margin is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - defines maximum continuous reverse voltage before breakdown; sets upper limit for input/output voltage rails in buck/boost converters |
| IF | 1 A - average forward current rating; determines steady-state power handling without derating at 25°C ambient |
| IFSM | 30 A - peak non-repetitive surge current (8.3 ms half-sine); supports inrush and fault-current tolerance in AC/DC front-ends |
| VF | 0.70 V @ 1 A, 25°C - low conduction loss improves efficiency in high-frequency SMPS; reduces heat generation vs. PN diodes |
| RθJA | 90 °C/W - thermal resistance value used to calculate junction temperature rise above ambient under given power dissipation |
| TJ(max) | +150 °C - maximum allowable junction temperature; enables operation in under-hood automotive environments or sealed enclosures |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or ground return) in buck or flyback configurations |
| Cathode | Forward current exit / reverse-blocking terminal | Connected to output rail or positive bus; polarity marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and infotainment power supplies |
| Guard ring structure | Enhances ruggedness against voltage transients and edge breakdown in high dv/dt environments (10,000 V/µs) |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives; suitable for green manufacturing and export compliance |
| UL 94V-0 molding compound | Self-extinguishing encapsulation material prevents flame propagation in safety-critical power assemblies |
Applications
| Automotive DC-DC Converters | Laptop Adapter Secondary Rectification |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 3.3 V/5 V logic rails in vehicle infotainment systems. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter topology. Use Value: Low VF minimizes conduction loss at 1 A load, improving overall efficiency and reducing thermal stress on PCB layout. | Use Scenario: Secondary-side rectification in 65 W universal-input AC/DC adapters for portable computing. IC Role / Device Role / Timing Role: Unidirectional current path after high-frequency transformer; handles 100–120 kHz switching waveforms. Use Value: 30 A IFSM withstands startup surges; DO-41 package allows manual rework and automated through-hole assembly. |
| Industrial SMPS Auxiliary Supplies | LED Driver Output Stage |
Use Scenario: Isolated auxiliary bias supply powering gate drivers and controllers in motor drive inverters. IC Role / Device Role / Timing Role: Rectifier in flyback-derived auxiliary winding circuit operating at 50–100 kHz. Use Value: +150 °C TJ(max) ensures reliability across wide ambient ranges (-40°C to +85°C industrial grade). | Use Scenario: Constant-current output rectification in isolated LED streetlight drivers (20–40 V output). IC Role / Device Role / Timing Role: Freewheeling path during MOSFET off-time in buck-boost or SEPIC LED topologies. Use Value: Guard ring design prevents premature failure under line-voltage transients common in outdoor lighting installations. |
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-1EJH05-M3/5AT | Same DO-41 package, 1 A / 50 V rating, but VF = 0.55 V @ 1 A - lower conduction loss; no AEC-Q101 qualification | Preferred for cost-sensitive consumer adapters where automotive qualification is unnecessary | Select when lowest possible VF is prioritized over automotive reliability validation |
| ON Semiconductor SB150 | DO-41, 1 A / 50 V, VF = 0.75 V @ 1 A, TJ max = +125°C - lower thermal rating and higher VF | Suitable for commercial-grade industrial supplies with moderate ambient temperatures | Choose if legacy BOM compatibility with ON Semi footprint is required and +150°C operation is not needed |
Compared with VS-1EJH05-M3/5AT and SB150, the SR105 R0G uniquely combines AEC-Q101 qualification, +150°C junction rating, and 0.70 V forward drop - making it optimal for thermally demanding automotive and industrial power stages where long-term reliability under stress is critical.
Availability
SR105 R0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, laptop adapter secondary rectification, and industrial SMPS auxiliary supplies requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for SR105 R0G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101-compliant product lines.
The SR105 R0G belongs to TSC's SR102–SR115 Schottky rectifier family, engineered for high-efficiency, high-reliability power conversion in automotive, industrial, and consumer power supplies where low VF, surge robustness, and thermal resilience are essential.
FAQ
What is the maximum junction temperature rating for SR105 R0G?
The SR105 R0G has a maximum junction temperature (TJ(max)) of +150°C, confirmed in the Absolute Maximum Ratings table. This rating allows reliable operation in high-ambient environments such as under-hood automotive applications or sealed industrial enclosures. The SR105 R0G must be thermally managed using its specified RθJA of 90°C/W to ensure actual junction temperature remains below this limit during operation.
Is SR105 R0G AEC-Q101 qualified?
Yes, SR105 R0G is AEC-Q101 qualified, as indicated by the "H" suffix in ordering codes (e.g., SR105H) and explicitly stated in the FEATURES section. The "R0G" suffix denotes green compound and standard packaging - confirming full automotive qualification for the SR105 R0G variant. This makes the SR105 R0G suitable for automotive power modules, body control units, and ADAS subsystems.
What is the forward voltage of SR105 R0G at 1 A and 25°C?
The forward voltage (VF) of SR105 R0G is 0.70 V at IF = 1 A and TJ = 25°C, per the Electrical Specifications table. This value is measured under pulse test conditions (PW = 0.3 ms) and reflects typical conduction loss. At elevated junction temperatures (e.g., 100°C), VF decreases slightly, which is characteristic of Schottky diodes.
Does SR105 R0G have a guard ring structure?
Yes, SR105 R0G incorporates a guard ring structure for overvoltage protection, as stated in the FEATURES list. This design enhances edge termination robustness, improving resistance to surface flashover and localized avalanche under high dv/dt or transient voltage conditions - a key reliability feature distinguishing it from basic Schottky rectifiers.
What package type does SR105 R0G use?
SR105 R0G uses the DO-204AL (DO-41) axial-leaded package, confirmed in MECHANICAL DATA and PACKAGE OUTLINE DIMENSIONS sections. It features pure tin-plated leads compliant with J-STD-002 solderability standards, UL 94V-0 molding compound, and cathode polarity indicated by a band on the device body - all consistent across the SR102–SR115 series.
SR105 R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 1 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-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR105 R0G FAQ
1.How can I place an order for SR105 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR105 R0G 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 SR105 R0G reliable?
The price and inventory of SR105 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR105 R0G is usually 5 days.
3.What payment methods are accepted for SR105 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR105 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR105 R0G?
SR105 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR105 R0G 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 SR105 R0G?
For technical support, including SR105 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR105 R0G requirements.
6.How does Aetrix verify that SR105 R0G is sourced from the original manufacturer or authorized distributors?
All SR105 R0G 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 SR105 R0G meets industry standards.
7.What is the process for return or replacement of SR105 R0G?
All SR105 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR105 R0G, 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 SR105 R0G part is unused and in its original packaging.
Return procedure for SR105 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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