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Taiwan Semiconductor Corporation SR109HR0G
- Part No.:
- SR109HR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR109HR0G.pdf
- Description:
- DIODE SCHOTTKY 90V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,397
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Product details
Overview
SR109HR0G from Taiwan Semiconductor is a 1 A, 90 V AEC-Q101-qualified Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.85 V forward voltage at 1 A and 100 µA reverse leakage at 25°C, used in automotive-grade DC-DC converters and industrial SMPS.
For engineers reviewing the SR109HR0G datasheet, SR109HR0G pinout, SR109HR0G application, or SR109HR0G equivalent, key selection factors include its AEC-Q101 qualification, 90 V repetitive peak reverse voltage, 30 A surge capability, low VF for thermal efficiency, and DO-41 mechanical compatibility with legacy through-hole layouts.
Technical Context
This Schottky rectifier uses a single-die construction with guard ring overvoltage protection and pure tin-plated leads compliant with J-STD-002 solderability. Its junction temperature rating extends to +150°C, supporting high-reliability automotive environments.
With 10,000 V/µs critical dv/dt rating and 90°C/W junction-to-ambient thermal resistance, SR109HR0G enables stable operation under fast-switching transients and moderate power dissipation without forced cooling in compact adapters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse blocking voltage; defines usable input range in 48 V–72 V DC-DC stages |
| IF | 1 A continuous - Rated average forward current; supports up to ~12 W conduction-limited output at 85°C ambient |
| IFSM | 30 A (8.3 ms) - Peak non-repetitive surge current; handles cold-start inrush in automotive power modules |
| VF | 0.85 V @ 1 A, 25°C - Low conduction loss; reduces heat generation vs. standard PN diodes by ~40% at same current |
| IR | 100 µA @ 90 V, 25°C - Low reverse leakage; maintains efficiency in high-impedance bias networks and standby circuits |
| TJ max | +150°C - Extended junction temperature rating; enables use in under-hood automotive modules without derating |
| RθJA | 90°C/W - Thermal resistance with standard PCB pad; requires ≥25 mm² copper pour for full 1 A rating at 70°C ambient |
Pinout & Package
Package: DO-204AL (DO-41), axial lead, cathode indicated by band. Lead finish: pure tin, J-STD-002 compliant. Weight: 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must be routed with low-inductance path |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; polarity band identifies this terminal for correct PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| Guard ring structure | Prevents premature edge breakdown at high dv/dt, enabling reliable operation in fast-switching flyback topologies |
| Halogen-free compound | Complies with IEC 61249-2-21; eliminates corrosive halogen emissions during reflow or end-of-life incineration |
| 10,000 V/µs dv/dt rating | Withstands rapid voltage transients in motor drive snubbers and inductive load switching without false turn-on |
| JESD 201 Class 2 whisker resistance | Ensures long-term reliability of tin-plated leads under thermal cycling, critical for automotive under-hood deployment |
Applications
| Automotive DC-DC Converters | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: Step-down conversion from 48 V battery to 12 V auxiliary rail in ADAS domain controllers. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology, conducting during secondary-side on-time. Use Value: 0.85 V VF minimizes conduction loss at 1 A load, improving system efficiency by >2% versus standard 1N5819 variants. | Use Scenario: Output stage rectification in 24 V, 10 W industrial wall adapter with universal AC input. IC Role / Device Role / Timing Role: Uncontrolled rectifier delivering filtered DC to linear post-regulator; operates continuously at 1 A average current. Use Value: AEC-Q101 qualification and 150°C TJ rating ensure field reliability across extended temperature cycles in factory automation enclosures. |
| Telecom Power Modules | LED Driver Secondary Side |
Use Scenario: Isolated 48 V telecom power supply feeding distributed baseband processing boards. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in active clamp forward converter, handling high-frequency reverse recovery demands. Use Value: 10,000 V/µs dv/dt rating prevents spurious conduction during clamp capacitor discharge transitions. | Use Scenario: Constant-current LED string driver with isolated flyback topology powering streetlight modules. IC Role / Device Role / Timing Role: Output rectifier conducting during transformer reset phase; exposed to 90 V reverse bias during primary switch on-time. Use Value: 90 V VRRM provides 20% margin above 72 V peak reflected output voltage, ensuring robustness against line transients. |
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-1EQH09-M3/45 | Same DO-41 package, 90 V VRRM, but 0.79 V VF @ 1 A and only AEC-Q200 rated (not Q101) | Lacks automotive-grade qualification; suitable for industrial/commercial but not safety-critical vehicle systems | Choose when cost sensitivity outweighs AEC-Q101 requirement and lower VF is prioritized |
| ON Semiconductor SB190 | DO-41, 90 V, 1 A, but 1.05 V VF @ 1 A and no AEC-Q101 documentation; TJ max = 125°C | Higher conduction loss and reduced thermal headroom limit use in high-ambient automotive modules | Acceptable for non-automotive 24 V adapters where efficiency and temperature margin are less constrained |
Compared with VS-1EQH09-M3/45 and SB190, SR109HR0G uniquely combines AEC-Q101 qualification, 150°C junction rating, and guaranteed 0.85 V VF, making it the only option validated for under-hood automotive power conversion where both reliability and thermal performance are mandatory.
Availability
SR109HR0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS designs, and telecom power modules requiring stable component supply with AEC-Q101 compliance and DO-41 through-hole compatibility.
Supply support for SR109HR0G 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 Schottky rectifiers, TVS diodes, and MOSFETs, with global distribution and automotive qualification capabilities.
The SR102–SR115 family was designed specifically for high-efficiency, high-reliability rectification in automotive and industrial power supplies, emphasizing AEC-Q101 compliance, low VF, and robust surge handling in standard DO-41 packaging.
FAQ
What is the peak repetitive reverse voltage rating for SR109HR0G?
The SR109HR0G has a repetitive peak reverse voltage (VRRM) rating of 90 V, verified per Taiwan Semiconductor's G2104 datasheet. This value defines the maximum sustained reverse-bias voltage the device can block without breakdown. It is critical for selecting appropriate input/output voltage margins in flyback and forward converter designs where reflected voltages may approach this limit.
Is SR109HR0G qualified for automotive applications?
Yes, SR109HR0G is AEC-Q101 qualified, as confirmed by its "H" suffix in the ordering code and explicit listing in the qualification section of the Taiwan Semiconductor datasheet. This certification covers stress tests including HTGB, HTRB, and temperature cycling, validating its suitability for automotive power modules such as body control units and infotainment DC-DC supplies.
What is the forward voltage drop of SR109HR0G at rated current?
The SR109HR0G exhibits a typical forward voltage (VF) of 0.85 V at 1 A and 25°C, per the electrical specifications table in the G2104 datasheet. This value increases with junction temperature and current; at 100°C and 1 A, VF rises to approximately 0.75 V due to negative temperature coefficient behavior inherent to Schottky diodes.
Does SR109HR0G have a specified surge current rating?
Yes, SR109HR0G has a non-repetitive peak forward surge current (IFSM) rating of 30 A for an 8.3 ms single half-sine wave, as stated in the Absolute Maximum Ratings table. This rating supports robust handling of inrush currents during cold start in automotive systems and transient overloads in industrial power supplies without permanent degradation.
What package type does SR109HR0G use, and what are its key mechanical features?
SR109HR0G uses the DO-204AL (DO-41) axial package, with pure tin-plated leads compliant with J-STD-002 solderability standards and meeting JESD 201 Class 2 whisker resistance. The molding compound is UL 94V-0 rated, and polarity is marked by a cathode band - all confirmed in the Mechanical Data section of the G2104 datasheet.
SR109HR0G 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):
- 90 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 90 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR109HR0G FAQ
1.How can I place an order for SR109HR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR109HR0G 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 SR109HR0G reliable?
The price and inventory of SR109HR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR109HR0G is usually 5 days.
3.What payment methods are accepted for SR109HR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR109HR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR109HR0G?
SR109HR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR109HR0G 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 SR109HR0G?
For technical support, including SR109HR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR109HR0G requirements.
6.How does Aetrix verify that SR109HR0G is sourced from the original manufacturer or authorized distributors?
All SR109HR0G 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 SR109HR0G meets industry standards.
7.What is the process for return or replacement of SR109HR0G?
All SR109HR0G units undergo pre-shipment inspection (PSI). If there is an issue with SR109HR0G, 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 SR109HR0G part is unused and in its original packaging.
Return procedure for SR109HR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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