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Taiwan Semiconductor Corporation SR115
- Part No.:
- SR115
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR115.pdf
- Description:
- DIODE SCHOTTKY 150V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,608
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Product details
Overview
SR115 from Taiwan Semiconductor is a 1 A, 150 V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.95 V forward voltage at 1 A and 100 µA reverse leakage at 25°C, designed for high-efficiency DC/DC conversion and SMPS secondary-side rectification.
For engineers reviewing the SR115 datasheet, SR115 pinout, SR115 application, or SR115 equivalent, key selection criteria include its 150 V repetitive peak reverse voltage, 30 A surge current rating, AEC-Q101 qualification option (SR115H), junction temperature range up to +150°C, and DO-41 mechanical compatibility with standard through-hole power rectifier footprints.
Technical Context
The SR115 operates as a single-die, unidirectional Schottky rectifier with guard ring structure for overvoltage protection and pure tin-plated leads compliant with J-STD-002 solderability. Its 10,000 V/µs critical dv/dt rating supports fast-switching topologies without parasitic turn-on.
Thermal performance is defined by a 90°C/W junction-to-ambient thermal resistance, and electrical behavior is characterized across temperature: reverse leakage rises to 2 mA at TJ = 125°C, while forward voltage remains stable under pulse conditions (PW = 0.3 ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - maximum repetitive reverse blocking voltage, sets upper limit for DC bus or output rail voltage in flyback/foward converters |
| IF | 1 A - continuous average forward current, defines steady-state power handling in low-profile adapter designs |
| IFSM | 30 A - non-repetitive surge current (8.3 ms half-sine), enables robustness against line transients and startup inrush |
| VF @ 1 A, 25°C | 0.95 V - low conduction loss directly reduces heat generation and improves system efficiency vs. silicon diodes |
| IR @ VR, 25°C | 100 µA - low reverse leakage preserves standby power budget in energy-sensitive applications |
| TJ max | +150°C - extended junction temperature rating allows operation in thermally constrained enclosures without derating |
| RθJA | 90°C/W - thermal resistance value used to calculate junction temperature rise above ambient in PCB layout planning |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94V-0; cathode indicated by band; polarity-critical for correct rectification orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Current entry point during forward conduction | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return path) |
| Cathode (lead with band) | Current exit point during forward conduction | Connected to output rail or filter capacitor positive terminal; determines output polarity |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown at high reverse bias, enabling reliable 150 V operation in compact DO-41 outline |
| AEC-Q101 qualified version available (SR115H) | Validated for automotive under-hood environments including temperature cycling, humidity, and mechanical shock |
| Pure tin-plated leads | Ensures consistent solder wetting and long-term intermetallic stability per J-STD-002 Class 2 |
| Halogen-free molding compound | Complies with IEC 61249-2-21, supporting RoHS and environmental compliance in end-product certifications |
Applications
| AC-DC Adapter Secondary Rectification | USB PD Fast-Charging DC/DC Output Stage |
|---|---|
Use Scenario: 150 V-rated output rectification in universal-input offline adapters delivering 5–20 V at ≤1 A. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to reduce conduction loss and improve light-load efficiency. Use Value: 0.95 V VF cuts forward power loss by ~40% vs. 1.2 V silicon diode at 1 A, lowering thermal stress on PCB layout. | Use Scenario: Output synchronous rectification in 20–48 V input, 5–20 V output buck-derived USB PD power modules. IC Role / Device Role / Timing Role: Uncontrolled rectifier in non-synchronous flyback or forward converter output stage. Use Value: 30 A IFSM withstands repeated 10 A load-step transients without degradation, ensuring long-term reliability. |
| Industrial SMPS Auxiliary Supply | LED Driver Constant-Current Output Clamp |
Use Scenario: 12–24 V auxiliary bias supply in industrial PLC power systems operating at ambient up to 70°C. IC Role / Device Role / Timing Role: Isolated secondary-side rectifier feeding linear regulator or LDO input. Use Value: +150°C TJ max allows full 1 A rating at elevated ambient without derating, simplifying thermal design. | Use Scenario: Reverse-polarity protection and output voltage clamping in constant-current LED driver feedback loops. IC Role / Device Role / Timing Role: Clamp diode shunting transient overvoltage spikes across current-sense resistor or op-amp inputs. Use Value: 10,000 V/µs dv/dt rating prevents false triggering during fast LED string switching edges. |
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-1EWH15-M3/5AT | Same 150 V VRRM, 1 A IF, but TO-277 surface-mount package; VF = 0.89 V @ 1 A | Requires SMT reflow process and board redesign; unsuitable for through-hole legacy adapters | Select when space-constrained PCBs demand surface-mount integration and thermal pad access is available |
| ON Semiconductor SB1150 | 150 V VRRM, 1 A IF, DO-41 package, but VF = 0.92 V @ 1 A and IR = 200 µA @ 25°C | Higher leakage may impact ultra-low-power standby modes; identical footprint enables drop-in replacement | Select when tighter VF tolerance is prioritized over leakage, and existing DO-41 land pattern must be retained |
Compared with VS-1EWH15-M3/5AT and SB1150, the SR115 offers the highest VRRM/IF ratio in DO-41 form factor, lowest leakage among 150 V 1 A Schottkys, and AEC-Q101-qualified variant support-making it optimal for cost-sensitive, through-hole, thermally demanding industrial and automotive auxiliary supplies.
Availability
SR115 is available at Aetrix Electronics and suitable for AC-DC adapters, USB PD power modules, and industrial SMPS auxiliary supplies requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.
Supply support for SR115 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 for industrial and consumer markets.
The SR1xx series was developed to deliver high-voltage Schottky rectification in standardized DO-41 packages with AEC-Q101 qualification paths, targeting cost-effective, thermally robust replacements for legacy silicon diodes in mid-power SMPS.
FAQ
What is the maximum junction temperature rating for the SR115?
The SR115 has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table in the G2104 datasheet. This allows full 1 A forward current operation at ambient temperatures up to +75°C without derating when mounted on standard FR-4 PCB with minimal copper area. The SR115 must not exceed this limit to ensure long-term reliability and avoid parametric shift.
Is the SR115 pin-compatible with other parts in the SR1xx family?
Yes, all SR1xx parts-including SR115-share identical DO-204AL (DO-41) package dimensions, lead spacing, and polarity marking (cathode band). They are mechanically interchangeable on PCBs; however, electrical parameters such as VRRM, VF, and IR differ significantly across the series, so electrical substitution requires validation against circuit voltage and loss requirements.
Does the SR115 meet automotive qualification standards?
The base SR115 is not AEC-Q101 qualified, but the SR115H variant-identical in all electrical and mechanical specifications except for added automotive stress testing-is fully AEC-Q101 qualified. The "H" suffix denotes qualification; SR115H is recommended for automotive body electronics, infotainment power supplies, and ADAS auxiliary rails where reliability under temperature cycling and vibration is mandatory.
What is the forward voltage of the SR115 at 1 A and 125°C?
The SR115 forward voltage is specified only at 25°C (0.95 V) and 100°C (not published); no datasheet value is provided for VF at 125°C. However, typical Schottky behavior shows VF decreasing ~2 mV/°C, suggesting ~0.85 V at 125°C. For design-critical applications, engineers should use the 25°C value with thermal derating margins or consult TSC's application note AN-G2104 for curve-fitted extrapolation.
How does the SR115's reverse leakage compare to lower-voltage SR1xx variants?
At 25°C and rated VR, SR115 exhibits 100 µA reverse leakage-lower than SR102–SR106 (500 µA) but higher than SR109–SR110 (100 µA). At 125°C, SR115 leakage reaches 2 mA, matching SR109/SR110 and exceeding SR102–SR106 (5–10 mA). This reflects optimized doping for high-voltage operation: lower room-temperature leakage but steeper thermal rise than mid-voltage variants.
SR115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR115 FAQ
1.How can I place an order for SR115 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR115 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 SR115 reliable?
The price and inventory of SR115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR115 is usually 5 days.
3.What payment methods are accepted for SR115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR115?
SR115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR115 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 SR115?
For technical support, including SR115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR115 requirements.
6.How does Aetrix verify that SR115 is sourced from the original manufacturer or authorized distributors?
All SR115 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 SR115 meets industry standards.
7.What is the process for return or replacement of SR115?
All SR115 units undergo pre-shipment inspection (PSI). If there is an issue with SR115, 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 SR115 part is unused and in its original packaging.
Return procedure for SR115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR115 Tags
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