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Taiwan Semiconductor Corporation SR105
- Part No.:
- SR105
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR105.pdf
- Description:
- DIODE SCHOTTKY 50V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
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Product details
Overview
SR105 from Taiwan Semiconductor is a 1 A, 50 V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.70 V forward voltage at 1 A and 5 mA reverse leakage at 100 °C junction temperature. It delivers high surge current capability (30 A), low power loss, and guard ring–enhanced overvoltage protection for use in compact DC/DC converters.
For engineers reviewing the SR105 datasheet, SR105 pinout, SR105 application, or SR105 equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, thermal resistance of 90 °C/W, AEC-Q101 qualification option (SR105H), RoHS/halogen-free compliance, and suitability for space-constrained, high-efficiency power conversion designs.
Technical Context
The SR105 operates as a single-die, unidirectional Schottky rectifier with cathode-band polarity indication and pure tin-plated leads compliant with J-STD-002 solderability. Its junction-to-ambient thermal resistance is 90 °C/W, and it supports continuous operation up to 125 °C (or 150 °C for selected variants).
It exhibits a critical rate of rise of off-state voltage (dv/dt) of 10,000 V/µs and is rated for non-repetitive surge currents up to 30 A (8.3 ms half-sine). Reverse leakage remains ≤500 µA at 25 °C and ≤5 mA at 100 °C under rated 50 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse blocking voltage; defines safe operating range in DC/DC flyback or buck output stages |
| IF | 1 A - average forward current rating; determines continuous conduction capability in low-power SMPS outputs |
| VF @ 1 A, 25°C | 0.70 V - forward voltage drop; directly impacts conduction loss and thermal load in high-frequency switching paths |
| IFSM | 30 A - non-repetitive surge current; enables robustness against inrush and transient overloads |
| TJ max | 125 °C - maximum junction temperature; sets thermal derating limits for PCB layout and heatsinking |
| RθJA | 90 °C/W - junction-to-ambient thermal resistance; used to calculate temperature rise under real-world board conditions |
| IR @ 50 V, 100°C | 5 mA - reverse leakage current; affects standby power loss and reliability in high-temp environments |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94V-0; cathode indicated by band; weight ≈ 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return); must handle full 1 A continuous and 30 A surge |
| Cathode (lead with band) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive); blocks up to 50 V reverse voltage with <5 mA leakage at 100°C |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against voltage transients and edge breakdown, improving reliability in noisy automotive or industrial supply rails |
| AEC-Q101 qualification option (SR105H) | Validated for automotive-grade stress testing including temperature cycling, HTRB, and ESD, enabling use in under-hood modules |
| Low VF (0.70 V) | Reduces conduction losses by ~15–20% vs. comparable 50 V Si diodes, directly improving efficiency in 1 MHz+ DC/DC converters |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for consumer, industrial, and automotive end equipment without compromising thermal or electrical performance |
Applications
| USB-C Power Delivery Adapter | Industrial PLC I/O Module |
|---|---|
Use Scenario: Secondary-side rectification in 20–60 W USB-C PD adapters operating at 300–500 kHz switching frequency. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional silicon diodes to minimize conduction loss and improve thermal margin. Use Value: 0.70 V VF reduces average power dissipation by ~0.3 W vs. 1.0 V Si diode at 1 A, lowering heatsink requirement and enabling ultra-thin adapter form factors. | Use Scenario: Output rectification in isolated 24 V DC input power supplies for programmable logic controller (PLC) digital I/O channels. IC Role / Device Role / Timing Role: Freewheeling and output rectification element in flyback or forward converter topologies. Use Value: 30 A IFSM withstands repeated inrush surges during hot-plug I/O module insertion; 125 °C TJ rating ensures stable operation in enclosed control cabinets. |
| Automotive Body Control Module | Medical Portable Diagnostic Device |
Use Scenario: Reverse polarity protection and auxiliary rail rectification in 12 V battery-fed body control units (BCUs) with CAN communication. IC Role / Device Role / Timing Role: Unidirectional current path enforcement and DC bus conditioning in low-voltage subsystems. Use Value: AEC-Q101 qualified variant (SR105H) provides validated reliability for 15-year automotive service life; guard ring prevents failure during load dump transients. | Use Scenario: Auxiliary power rectification in battery-backed portable ultrasound or glucose monitor systems requiring low standby current. IC Role / Device Role / Timing Role: Low-leakage output rectifier in linear or switching auxiliary supplies powering analog front-ends and sensors. Use Value: ≤500 µA IR at 25 °C minimizes battery drain during multi-week idle periods; halogen-free construction meets IEC 60601-1 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay SS15 | Same 1 A / 50 V rating, VF = 0.55 V typ., RθJA = 75 °C/W, DO-204AL package | Lower VF improves efficiency but requires tighter thermal design due to higher power density | Prefer when minimizing conduction loss is primary; verify board-level thermal performance with 75 °C/W RθJA |
| ON Semiconductor SB150 | 1 A / 50 V, VF = 0.72 V max., IFSM = 25 A, DO-204AL, no AEC-Q101 option | Limited surge robustness and no automotive qualification; suitable only for commercial-grade applications | Select for cost-sensitive commercial power supplies where 30 A surge headroom is not required |
Compared with SS15 and SB150, SR105 offers balanced trade-offs: higher surge rating than SB150 and AEC-Q101 availability (as SR105H), while maintaining lower thermal resistance than many legacy alternatives-making it optimal for thermally constrained, reliability-critical 1 A rectification tasks.
Availability
SR105 is available at Aetrix Electronics and suitable for USB-C power adapters, industrial PLC power supplies, automotive body control modules, and portable medical device auxiliary power circuits requiring stable component supply across long production lifecycles.
Supply support for SR105 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 validation capability.
The SR102–SR115 series was designed specifically for high-efficiency, low-profile AC/DC and DC/DC power conversion in automotive, industrial, and consumer applications-emphasizing ruggedness, thermal stability, and regulatory compliance.
FAQ
What is the maximum junction temperature rating for SR105?
The SR105 has a maximum junction temperature (TJ max) of 125 °C under standard operating conditions. Some variants within the SR102–SR115 family support 150 °C, but the SR105 specifically is rated to 125 °C per its absolute maximum ratings table. This value governs thermal derating curves and must be respected in PCB layout and ambient temperature planning for reliable operation of the SR105.
Is SR105 available in an AEC-Q101 qualified version?
Yes, the AEC-Q101 qualified version of SR105 is designated SR105H. It undergoes full automotive stress testing per AEC-Q101 standards-including temperature cycling, highly accelerated life testing (HALT), and ESD verification-and is marked with an "H" suffix in the ordering code. The SR105H maintains identical electrical and thermal specifications as the standard SR105.
What is the forward voltage of SR105 at 1 A and 25°C?
The forward voltage (VF) of SR105 is specified as a maximum of 0.70 V at 1 A forward current and 25 °C junction temperature, measured under pulse test conditions (PW = 0.3 ms). This value is confirmed in the Electrical Specifications table of the G2104 datasheet and directly impacts conduction loss calculations for the SR105 in power supply designs.
Does SR105 have a guard ring structure, and what is its purpose?
Yes, SR105 incorporates a guard ring structure, explicitly listed under FEATURES in the datasheet. This design feature mitigates edge breakdown under high dv/dt or transient overvoltage conditions-improving ruggedness in switching power supplies and automotive environments where voltage spikes occur. It contributes to the SR105's rated dv/dt capability of 10,000 V/µs.
What packaging options are available for SR105?
SR105 is offered in DO-204AL (DO-41) package with two standard packing formats: 5,000 units per tape-and-reel (ordering code SR105) and 3,000 units per ammo box (ordering code SR105A0G). AEC-Q101 qualified versions follow the same packaging scheme with "H" suffix (e.g., SR105H, SR105HA0G). No alternate packages (e.g., SMD) are supported for the SR105.
SR105 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):
- 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 FAQ
1.How can I place an order for SR105 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR105 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 reliable?
The price and inventory of SR105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR105 is usually 5 days.
3.What payment methods are accepted for SR105?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR105 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR105?
SR105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR105 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?
For technical support, including SR105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR105 requirements.
6.How does Aetrix verify that SR105 is sourced from the original manufacturer or authorized distributors?
All SR105 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 meets industry standards.
7.What is the process for return or replacement of SR105?
All SR105 units undergo pre-shipment inspection (PSI). If there is an issue with SR105, 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 part is unused and in its original packaging.
Return procedure for SR105:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR105 Tags
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