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Taiwan Semiconductor Corporation SR1204 A0G
- Part No.:
- SR1204 A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR1204 A0G.pdf
- Description:
- DIODE SCHOTTKY 40V 12A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:7,518
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Product details
Overview
SR1204 A0G from Taiwan Semiconductor is a 12A, 40V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.55 V at 12 A, 25°C), high surge current capability (320 A at 8.3 ms), and AEC-Q101 qualification option. It serves as a primary output rectifier in high-efficiency DC/DC converters for automotive and industrial power supplies.
For engineers reviewing the SR1204 A0G datasheet, SR1204 A0G pinout, SR1204 A0G application, or SR1204 A0G equivalent, key selection criteria include repetitive peak reverse voltage (40 V), junction-to-lead thermal resistance (3 °C/W), RoHS/halogen-free compliance, and cathode-band polarity marking for reliable board-level assembly and thermal management.
Technical Context
The SR1204 A0G uses a single-die Schottky structure with guard ring overvoltage protection, enabling stable operation up to 150°C junction temperature. Its low VF and high IFSM support high-frequency switching topologies where conduction loss and transient robustness are critical.
Thermal performance is defined by RθJL = 3 °C/W and RθJA = 24 °C/W, indicating efficient heat transfer to the PCB pad and lead frame. The device operates within -55°C to +150°C storage and junction ranges, meeting automotive-grade reliability requirements when AEC-Q101 qualified versions are selected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum non-repetitive reverse blocking voltage; defines upper limit for DC bus or flyback clamp voltage selection |
| IF | 12 A - Continuous average forward current at TA = 75°C; sets minimum trace width and heatsinking requirement |
| IFSM | 320 A (8.3 ms) - Peak non-repetitive surge rating; determines immunity to inrush and short-circuit transients |
| VF | 0.55 V @ 12 A, 25°C - Low conduction loss directly reduces power dissipation and improves system efficiency |
| RθJL | 3 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling using PCB copper pour as heatsink |
| TJ max | 150°C - Maximum operating junction temperature; supports under-hood automotive environments with derating |
Pinout & Package
Package: DO-201AD - Axial-lead, molded plastic case with pure tin-plated leads (J-STD-002 compliant), UL 94V-0 rated compound, and cathode band polarity indicator. Weight: 1.10 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in synchronous buck); requires low-inductance layout |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail; carries full load current and must be routed with adequate copper area |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers |
| AEC-Q101 qualification option | Validated for automotive power modules requiring stress-tested reliability (note: SR1204 A0G is standard grade; H-suffix denotes AEC-Q101) |
| Low VF at high IF | 0.55 V @ 12 A enables >92% efficiency in 12 V output DC/DC converters at full load |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU directives for environmentally constrained industrial and consumer applications |
Applications
| Automotive DC/DC Converters | Industrial SMPS Outputs |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down conversion in vehicle infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier replacing fast recovery diodes to reduce conduction loss and thermal stress. Use Value: Enables smaller heatsinks and higher power density due to 0.55 V VF and 320 A IFSM. | Use Scenario: Secondary-side rectification in 48 V input telecom and server PSUs. IC Role / Device Role / Timing Role: High-current freewheeling path in synchronous rectifier-assisted topologies. Use Value: Reduces system power loss by ~1.8 W vs. comparable 40 V FRD at 12 A, improving thermal margin. |
| Laptop Adapters | Renewable Energy Inverters |
Use Scenario: Output rectification in compact 65–90 W AC/DC adapters with high switching frequency. IC Role / Device Role / Timing Role: Low-loss unidirectional current path during PWM off-time in flyback or LLC secondary side. Use Value: Supports >90% efficiency targets with minimal thermal rise on double-sided PCBs. | Use Scenario: Auxiliary power supply rectification in solar microinverters and battery charge controllers. IC Role / Device Role / Timing Role: Isolated DC bus conditioning stage handling intermittent surges and wide ambient temperature swings. Use Value: Sustains operation up to 150°C junction temperature with no derating below 12 A at 75°C ambient. |
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-12BQ040-M3/45 | Same VRRM (40 V), identical DO-201AD package, but higher VF (0.62 V @ 12 A) | Slightly lower efficiency in high-duty-cycle applications; same thermal footprint | Prefer SR1204 A0G where <0.55 V VF is required to meet thermal budget |
| ON Semiconductor SB1240-E3/54 | 40 V VRRM, DO-201AD, but lower IFSM (200 A @ 8.3 ms) and higher RθJA (30 °C/W) | Less robust against line surges; requires larger PCB copper for equivalent thermal performance | Choose SR1204 A0G for designs needing 320 A surge rating and 3 °C/W RθJL |
Compared with VS-12BQ040-M3/45 and SB1240-E3/54, the SR1204 A0G delivers superior conduction efficiency and transient ruggedness while maintaining identical board-level integration-critical for space-constrained, thermally aggressive power stages.
Availability
SR1204 A0G is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS outputs, and laptop adapters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SR1204 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 automotive markets since 1979.
The SR1204 A0G belongs to TSC's high-current Schottky rectifier product line, engineered for high-efficiency, high-reliability power conversion in thermally demanding environments-especially where low VF, high IFSM, and robust packaging are essential.
FAQ
What is the maximum junction temperature rating for the SR1204 A0G?
The SR1204 A0G has a maximum junction temperature (TJ) of +150°C in DC forward mode. This rating allows operation in high-ambient environments such as under-hood automotive locations or enclosed industrial enclosures, provided thermal design accounts for its RθJL of 3 °C/W and RθJA of 24 °C/W. Derating curves in the datasheet define safe current limits above 75°C ambient.
Does the SR1204 A0G have AEC-Q101 qualification?
The SR1204 A0G is the standard-grade version and is not AEC-Q101 qualified. However, Taiwan Semiconductor offers the SR1204H and SR1204HA0G variants which are explicitly AEC-Q101 qualified. For automotive applications requiring stress-tested reliability, those H-suffix parts should be selected instead of the SR1204 A0G.
What is the forward voltage drop of the SR1204 A0G at full rated current?
The SR1204 A0G exhibits a maximum forward voltage (VF) of 0.55 V at 12 A and 25°C junction temperature, measured under pulsed conditions (PW = 0.3 ms). At elevated temperatures (e.g., 100°C), VF decreases slightly, supporting stable conduction loss behavior across its operating range.
What packaging options are available for the SR1204 A0G?
The SR1204 A0G is supplied in 500-piece ammo boxes. It shares the DO-201AD package with other members of the SR1202–SR1204 family. Tape-and-reel packaging (1,250 pcs) is available under the base part number SR1204 without the "A0G" suffix.
How does the guard ring feature improve reliability in the SR1204 A0G?
The guard ring in the SR1204 A0G enhances edge termination robustness, suppressing premature avalanche breakdown under transient overvoltage conditions. This design feature increases the device's ability to withstand voltage spikes-such as those from inductive kickback or ESD-without degradation, thereby extending service life in noisy power systems without requiring additional clamping components.
SR1204 A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 12 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-201AD
- Operating Temperature - Junction:
- -50°C ~ 150°C
SR1204 A0G FAQ
1.How can I place an order for SR1204 A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR1204 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 SR1204 A0G reliable?
The price and inventory of SR1204 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR1204 A0G is usually 5 days.
3.What payment methods are accepted for SR1204 A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR1204 A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR1204 A0G?
SR1204 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR1204 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 SR1204 A0G?
For technical support, including SR1204 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR1204 A0G requirements.
6.How does Aetrix verify that SR1204 A0G is sourced from the original manufacturer or authorized distributors?
All SR1204 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 SR1204 A0G meets industry standards.
7.What is the process for return or replacement of SR1204 A0G?
All SR1204 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SR1204 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 SR1204 A0G part is unused and in its original packaging.
Return procedure for SR1204 A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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