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Taiwan Semiconductor Corporation SR105 A0G
- Part No.:
- SR105 A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR105 A0G.pdf
- Description:
- DIODE SCHOTTKY 50V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SR105 A0G from Taiwan Semiconductor is a 1A, 50V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring low forward voltage drop (0.70 V at 1A, 25°C), high surge current capability (30 A), and junction temperature rating up to +150°C. It serves as primary output rectifier in compact DC-DC converters and AC-DC adapters.
For engineers reviewing the SR105 A0G datasheet, SR105 A0G pinout, SR105 A0G application, or SR105 A0G equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (90 °C/W), reverse leakage (5 µA at 100°C), AEC-Q101 qualification status, and DO-41 mechanical compatibility with automated through-hole assembly.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring structure for enhanced overvoltage robustness and meets JESD201 Class 2 whisker resistance. Its 50 V VRRM and 0.70 V VF balance efficiency and breakdown margin for mid-voltage secondary-side rectification.
The device operates across -55°C to +150°C junction range, supports 8.3 ms non-repetitive surge currents up to 30 A, and exhibits 90 °C/W junction-to-ambient thermal resistance under standard PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC flyback or buck output stage |
| IF | 1 A - Continuous average forward current; determines minimum trace width and heatsinking in 5–12 V output rails |
| VF @ 1A, 25°C | 0.70 V - Forward voltage drop; directly sets conduction loss (0.7 W at 1A) and impacts system efficiency |
| IFSM | 30 A - Peak non-repetitive surge current; enables survival during power-up inrush or transient overload |
| TJ max | +150°C - Maximum junction temperature; allows operation in sealed enclosures or high-ambient industrial environments |
| RθJA | 90 °C/W - Thermal resistance; used to calculate junction temperature rise above ambient (e.g., +90°C rise at 1W dissipation) |
| IR @ 50 V, 100°C | 5 µA - Reverse leakage current; critical for low-quiescent-power standby circuits and battery-backed systems |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Leads are pure tin plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., ground or switch node return); polarity must match layout silkscreen |
| Cathode | Forward current exit point | Marked by band; connects to positive output rail; reverse-biased during off-state to block 50 V |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves ruggedness against transient overvoltage events without requiring external snubbers |
| AEC-Q101 qualified option (SR105H A0G) | Validated for automotive under-hood applications including infotainment power supplies |
| Halogen-free compound (IEC 61249-2-21) | Complies with RoHS and ELV directives; eliminates corrosive halogen emissions during rework or failure |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth on leads under thermal cycling, ensuring long-term reliability in industrial control modules |
Applications
| AC-DC Adapter Secondary Rectification | USB-C PD Power Delivery Module |
|---|---|
Use Scenario: 5–20 V output stage of wall-mounted AC-DC adapter delivering up to 1A continuous load. IC Role / Device Role / Timing Role: Schottky rectifier replacing fast recovery diode to reduce conduction loss and improve efficiency. Use Value: 0.70 V forward drop lowers power dissipation by ~35% vs. 1.1 V Si diode, enabling smaller heatsink or higher power density. | Use Scenario: 9/15/20 V output rectification in compact USB-C PD power modules with tight thermal constraints. IC Role / Device Role / Timing Role: Output freewheeling diode in synchronous or quasi-resonant flyback topology. Use Value: 50 V VRRM provides 2× safety margin over 20 V max output, while 150°C TJ rating supports operation inside thermally dense PD bricks. |
| Industrial DC-DC Converter | Automotive Body Control Module (BCM) |
Use Scenario: 12 V input to 3.3/5 V isolated DC-DC converter powering microcontrollers and sensors in factory automation equipment. IC Role / Device Role / Timing Role: Secondary-side rectifier in 1–3 W isolated flyback or forward converter. Use Value: 30 A IFSM withstands repeated cold-start surges; DO-41 package fits legacy through-hole layouts without redesign. | Use Scenario: 12 V auxiliary power supply in BCM units exposed to under-hood temperatures up to +105°C ambient. IC Role / Device Role / Timing Role: Output rectifier in low-noise linear post-regulator or buck-derived supply. Use Value: +150°C TJ max and AEC-Q101-qualified variant (SR105H A0G) ensure functional safety compliance and extended lifetime. |
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-1EJH01-M3/5AT | Same DO-41 package, 50 V VRRM, 0.72 V VF, but rated only to +125°C TJ | Lacks AEC-Q101 qualification; not suitable for automotive under-hood use | Select when cost sensitivity outweighs temperature or automotive qualification requirements |
| ON Semiconductor SB150 | DO-41, 50 V VRRM, 0.85 V VF, 1A IF, +125°C TJ, RoHS-compliant | Higher forward drop increases conduction loss; no guard ring structure specified | Choose where legacy design reuse is prioritized and 0.15 V VF penalty is acceptable |
Compared with VS-1EJH01-M3/5AT and SB150, SR105 A0G offers superior thermal capability (+150°C TJ), integrated guard ring protection, and AEC-Q101-qualified variant availability-making it optimal for thermally demanding or automotive-grade designs where reliability margins are critical.
Availability
SR105 A0G is available at Aetrix Electronics and suitable for AC-DC adapters, USB-C PD modules, and industrial DC-DC converters requiring stable component supply, consistent DO-41 mechanical fit, and verified Schottky performance across temperature.
Supply support for SR105 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 industrial, computing, and consumer markets since 1979.
The SR102–SR115 series was developed to deliver high-efficiency, high-reliability Schottky rectifiers for space-constrained power conversion stages, emphasizing low VF, robust surge handling, and automotive-grade variants.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SR105 A0G?
The SR105 A0G has a VRRM of 50 V, meaning it can reliably block up to 50 V of reverse voltage in repetitive operation. This value is fixed per the SR105 designation in the SR102–SR115 family and is confirmed in the Absolute Maximum Ratings table of the G2104 datasheet revision. Exceeding this voltage risks avalanche breakdown and permanent damage to the SR105 A0G.
Is SR105 A0G AEC-Q101 qualified?
The base SR105 A0G is not AEC-Q101 qualified; however, the AEC-Q101 variant is designated SR105H A0G. The "H" suffix explicitly indicates qualification per AEC-Q101 stress test standards. Engineers requiring automotive-grade reliability must specify SR105H A0G-not SR105 A0G-when sourcing for under-hood or safety-critical applications.
What is the forward voltage (VF) of SR105 A0G at 1A and 25°C?
The SR105 A0G exhibits a typical forward voltage of 0.70 V at 1A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At elevated temperatures (e.g., 100°C), VF decreases slightly, improving conduction efficiency in thermally stressed operation of the SR105 A0G.
Does SR105 A0G have a guard ring structure?
Yes, the SR105 A0G incorporates a guard ring structure, as stated in the FEATURES section of the G2104 datasheet. This design enhances edge termination robustness, improves resistance to surface flashover under transient overvoltage, and contributes to the device's high dv/dt rating of 10,000 V/µs-critical for reliable operation in noisy switching environments using the SR105 A0G.
What packaging options are available for SR105 A0G?
The SR105 A0G is supplied in 3,000-piece ammo boxes, as indicated in the ORDERING INFORMATION table. The "A0G" suffix denotes the DO-204AL (DO-41) package in green compound, packed in bulk ammo format. Tape-and-reel (5,000 pcs) is available under the base code SR105 or SR105H, but SR105 A0G specifically refers to the ammo box configuration for manual or semi-automated assembly of the SR105 A0G.
SR105 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):
- 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 A0G FAQ
1.How can I place an order for SR105 A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR105 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 SR105 A0G reliable?
The price and inventory of SR105 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR105 A0G is usually 5 days.
3.What payment methods are accepted for SR105 A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR105 A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR105 A0G?
SR105 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR105 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 SR105 A0G?
For technical support, including SR105 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR105 A0G requirements.
6.How does Aetrix verify that SR105 A0G is sourced from the original manufacturer or authorized distributors?
All SR105 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 SR105 A0G meets industry standards.
7.What is the process for return or replacement of SR105 A0G?
All SR105 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SR105 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 SR105 A0G part is unused and in its original packaging.
Return procedure for SR105 A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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