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Taiwan Semiconductor Corporation SR104 B0G
- Part No.:
- SR104 B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR104 B0G.pdf
- Description:
- DIODE SCHOTTKY 40V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,050
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Product details
Overview
SR104 B0G from Taiwan Semiconductor is a 1 A, 40 V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring low forward voltage drop (0.55 V at 1 A, 25°C), high surge current capability (30 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in compact DC/DC converters for automotive infotainment power supplies.
For engineers reviewing the SR104 B0G datasheet, SR104 B0G pinout, SR104 B0G application, or SR104 B0G equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 125°C maximum junction temperature, guard ring–enhanced overvoltage protection, and compatibility with lead-free reflow soldering per J-STD-002.
Technical Context
This Schottky rectifier uses a single-die silicon construction with a guard ring structure to improve ruggedness against transient overvoltage events. Its low VF and high IFSM support high-efficiency, space-constrained power conversion where thermal management is limited.
The device operates across –55°C to +125°C junction temperature range and exhibits 500 µA max reverse leakage at 25°C and rated VR, rising to 10 mA at 100°C - critical for maintaining efficiency in thermally demanding environments like under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC/DC flyback or buck output stage |
| IF | 1 A continuous - Rated average forward current; supports sustained load delivery without derating below 75°C ambient |
| VF @ 1 A, 25°C | 0.55 V - Low conduction loss enables >92% efficiency in 5 V/1 A point-of-load designs |
| IFSM | 30 A - Withstands 8.3 ms half-sine surge; protects against inrush and fault transients in adapter inputs |
| TJ max | 125°C - Enables operation in sealed enclosures without active cooling in industrial control power rails |
| RθJA | 90 °C/W - Thermal resistance dictates minimum copper area needed on PCB for thermal compliance at full load |
| IR @ VR, 25°C | 500 µA - Low leakage preserves standby power budget in always-on automotive modules |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking. Leads are pure tin plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry node | Connected to switching node (e.g., buck converter switch node or transformer secondary center-tap) |
| Cathode | Current exit node | Connected to output filter capacitor and load; polarity marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves dv/dt immunity to 10,000 V/µs, preventing premature avalanche failure during fast-switching transitions |
| AEC-Q101 qualified version available | Validated for automotive power electronics requiring zero-defect reliability and extended temperature cycling |
| RoHS and halogen-free | Complies with IEC 61249-2-21; suitable for consumer and automotive end-equipment with strict material declarations |
| Junction-to-ambient thermal resistance | 90 °C/W enables 1 A operation on minimal 10 mm² copper pad without heatsink in natural convection |
Applications
| Automotive Infotainment Power Supply | USB-C PD Adapter Secondary Rectification |
|---|---|
Use Scenario: 12 V input to 5 V/1 A output buck converter in head unit power rail. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement; conducts during low-side switch conduction phase. Use Value: 0.55 V VF reduces conduction loss by ~35% vs. standard PN diode, lowering thermal stress on PCB layout. | Use Scenario: Secondary-side rectification in 20 W USB-C PD adapter with 5 V/3 A capability. IC Role / Device Role / Timing Role: Uncontrolled rectifier in flyback output stage, paired with LC filter. Use Value: 30 A IFSM withstands repeated plug-in surges; 500 µA IR ensures <1 mW standby loss at no-load. |
| Industrial PLC I/O Module Power | Smart Home Gateway DC/DC Converter |
Use Scenario: Isolated 24 V to 3.3 V DC/DC for microcontroller supply in DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Primary output rectifier on secondary winding of miniature planar transformer. Use Value: DO-41 package fits tight spacing constraints; 125°C TJ rating supports operation inside sealed metal enclosure. | Use Scenario: 12 V to 5 V step-down for Wi-Fi SoC and sensor interface in battery-backed gateway. IC Role / Device Role / Timing Role: Freewheeling diode in asynchronous buck regulator feeding PMIC input. Use Value: Guard ring prevents failure during ESD-coupled transients on shared 12 V rail; RoHS/halogen-free meets EU eco-design rules. |
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-1EQH04-M3/5BT | Same DO-41 package, 40 V VRRM, but VF = 0.52 V @ 1 A; higher IR (1 mA @ 25°C) | Marginally better conduction loss but higher leakage; less suitable for ultra-low-power standby | Prefer when peak efficiency >94% is prioritized over standby current |
| ON Semiconductor SB140-TB | DO-41, 40 V, VF = 0.54 V @ 1 A; TJ max = 125°C; not AEC-Q101 qualified | Lacks automotive qualification; identical thermal and electrical specs otherwise | Select for cost-sensitive industrial or consumer designs without automotive compliance needs |
Compared with VS-1EQH04-M3/5BT and SB140-TB, SR104 B0G uniquely combines AEC-Q101 readiness, 500 µA low leakage, and Taiwan Semiconductor's validated process for high-volume automotive production - making it optimal for Tier-1 supplier BOMs requiring traceable qualification evidence.
Availability
SR104 B0G is available at Aetrix Electronics and suitable for automotive infotainment power supplies, USB-C PD adapters, and industrial PLC I/O modules requiring stable component supply across multi-year production cycles.
Supply support for SR104 B0G 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 automotive, industrial, and consumer markets since 1979.
The SR102–SR115 series was designed specifically for high-reliability, cost-optimized Schottky rectification in space- and thermally constrained power supplies - emphasizing robustness, manufacturability, and qualification-readiness for automotive Tier-1 applications.
FAQ
What is the maximum junction temperature rating for SR104 B0G?
The SR104 B0G has a maximum junction temperature (TJ max) of +125°C, verified per absolute maximum ratings table. This allows uninterrupted operation in sealed enclosures up to 75°C ambient when mounted on ≥10 mm² copper area. The SR104 B0G must not be operated beyond this limit to ensure long-term reliability and avoid parametric shift.
Is SR104 B0G AEC-Q101 qualified?
The SR104 B0G itself is not AEC-Q101 qualified; however, the SR104H variant (e.g., SR104HA0G) carries full AEC-Q101 qualification. SR104 B0G shares identical die, package, and electrical specs but lacks the extended test program required for automotive qualification. For automotive use, specify SR104HA0G instead of SR104 B0G.
What does the 'B0G' suffix mean in SR104 B0G?
The 'B0G' suffix in SR104 B0G indicates packaging and environmental compliance: 'B' denotes tape-and-reel packaging (5,000 pcs/reel), '0' is a placeholder, and 'G' signifies green (halogen-free) molding compound compliant with IEC 61249-2-21. It is not a revision code or performance grade.
Can SR104 B0G replace a standard PN rectifier like 1N4004?
SR104 B0G can replace 1N4004 only in low-voltage, high-frequency applications where its 40 V VRRM and Schottky advantages apply - e.g., 5 V/1 A DC/DC outputs. It must not replace 1N4004 in 230 VAC front-end rectification due to lower VRRM and higher IR at elevated temperatures. Always verify circuit voltage stress and thermal margin before substitution.
What is the forward voltage drop of SR104 B0G at 1 A and 100°C junction temperature?
The SR104 B0G forward voltage drop is not specified at 100°C in the datasheet; only VF at 25°C (0.55 V max) and IR at 100°C (10 mA max) are provided. Based on typical Schottky behavior, VF decreases ~2 mV/°C - so VF at 100°C is estimated near 0.40–0.42 V. For design-critical applications, consult TSC's application engineering team for characterization data on SR104 B0G.
SR104 B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SR104 B0G FAQ
1.How can I place an order for SR104 B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR104 B0G 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 SR104 B0G reliable?
The price and inventory of SR104 B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR104 B0G is usually 5 days.
3.What payment methods are accepted for SR104 B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR104 B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR104 B0G?
SR104 B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR104 B0G 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 SR104 B0G?
For technical support, including SR104 B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR104 B0G requirements.
6.How does Aetrix verify that SR104 B0G is sourced from the original manufacturer or authorized distributors?
All SR104 B0G 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 SR104 B0G meets industry standards.
7.What is the process for return or replacement of SR104 B0G?
All SR104 B0G units undergo pre-shipment inspection (PSI). If there is an issue with SR104 B0G, 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 SR104 B0G part is unused and in its original packaging.
Return procedure for SR104 B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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