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Taiwan Semiconductor Corporation SF26G-T
- Part No.:
- SF26G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF26G-T.pdf
- Description:
- 35NS, 2A, 400V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:7,842
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Product details
Overview
SF26G-T from Taiwan Semiconductor is a 2 A, 400 V super fast rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 1.30 V forward voltage at 2 A and 25°C, and 50 A surge current capability. It serves as a primary output rectifier in high-frequency switching power supplies.
For engineers reviewing the SF26G-T datasheet, SF26G-T pinout, SF26G-T application, or SF26G-T equivalent, key selection criteria include its 400 V repetitive peak reverse voltage, low VF for reduced conduction loss, thermal resistance of 65°C/W, and suitability for DC-DC converters requiring fast recovery and high reliability.
Technical Context
The SF26G-T employs a glass passivated single-die silicon junction optimized for high-speed switching operation. Its 35 ns trr and 20 pF junction capacitance at 1 MHz/4 V enable efficient performance in 100–500 kHz SMPS topologies.
Designed for operation up to 150°C junction temperature, it delivers stable forward conduction with IR ≤5 µA at 25°C and ≤100 µA at 125°C under rated reverse voltage, supporting thermally demanding industrial and telecom power designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum non-repetitive reverse blocking voltage; defines safe operating range in flyback/freewheeling paths |
| IF | 2 A - continuous average forward current; sets steady-state power delivery capacity in output rectification |
| IFSM | 50 A - 8.3 ms half-sine surge rating; supports inrush and transient overload without failure |
| trr | 35 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables high-frequency switching with minimal switching loss |
| VF | 1.30 V - at IF = 2 A, TJ = 25°C; directly determines conduction loss and thermal load in continuous operation |
| RθJA | 65 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements on standard PCB layouts |
| CJ | 20 pF - at 1 MHz, VR = 4.0 V; impacts high-frequency noise coupling and EMI filter design |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, glass-passivated, RoHS-compliant, halogen-free molding compound (UL 94V-0), pure tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or filter capacitor positive; blocks 400 V reverse during off-cycle |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery | 35 ns trr enables use in >200 kHz SMPS without excessive switching loss or ringing |
| Low forward voltage | 1.30 V @ 2 A reduces I²R conduction loss and improves efficiency in 12–48 V output stages |
| High surge robustness | 50 A IFSM withstands repeated startup surges and short-circuit transients in unregulated supplies |
| Thermal stability | 150°C max junction temperature and 65°C/W RθJA support operation in enclosed, convection-cooled enclosures |
| Environmental compliance | RoHS-compliant and halogen-free per IEC 61249-2-21 - meets IPC-1752A reporting and green manufacturing requirements |
Applications
| Server PSU Output Rectification | Industrial DC-DC Converter |
|---|---|
Use Scenario: Primary 12 V/24 V output rectification in 80 PLUS Titanium server power supplies operating at 300–500 kHz. IC Role / Device Role / Timing Role: Super fast rectifier diode providing unidirectional current flow and reverse blocking during high-frequency transformer reset. Use Value: 35 ns trr minimizes reverse recovery loss; 1.30 V VF maintains >94% efficiency at full load without active cooling. | Use Scenario: Output stage rectifier in isolated 48 V input → 5 V/3.3 V DC-DC modules for PLC backplanes and motor drives. IC Role / Device Role / Timing Role: Freewheeling and output rectification device handling 2 A continuous current with intermittent 50 A surges. Use Value: 50 A IFSM rating ensures survival during motor stall events; DO-15 package allows manual rework and legacy board compatibility. |
| Telecom AC-DC Adapter | LED Driver Secondary Side |
Use Scenario: Secondary-side rectification in compact 65 W telecom wall adapters with tight thermal constraints. IC Role / Device Role / Timing Role: High-efficiency rectifier converting high-frequency transformer output to regulated DC bus. Use Value: 65°C/W RθJA enables operation at 70°C ambient without derating; 20 pF CJ limits EMI generation near EN55032 Class B limits. | Use Scenario: Constant-current output rectification in isolated LED drivers for street lighting (IP67, -40°C to +85°C). IC Role / Device Role / Timing Role: Freewheeling diode clamping inductor energy and rectifying buck-derived output. Use Value: 150°C TJ max and -55°C to +150°C storage range ensure reliability across outdoor thermal cycling; cathode band polarity marking prevents assembly errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R04 | Same 2 A / 400 V rating; trr = 30 ns (slightly faster); VF = 1.35 V (slightly higher); TO-220AC package | Requires PCB footprint change and heatsink mounting; better suited for forced-air-cooled 100+ W designs | Select when lower trr is critical and thermal management infrastructure exists |
| ES2D | 2 A / 200 V rating; trr = 35 ns; VF = 0.95 V; same DO-15 package; not voltage-compatible for 400 V systems | Limited to ≤200 V circuits; unsuitable for 400 V flyback or PFC boost outputs | Use only in lower-voltage secondary-side applications where 200 V margin suffices |
Compared with STTH2R04 and ES2D, the SF26G-T uniquely balances 400 V blocking, DO-15 form factor, and 35 ns recovery in a cost-effective through-hole solution-ideal for space-constrained, naturally cooled mid-power supplies where voltage rating and package compatibility are decisive.
Availability
SF26G-T is available at Aetrix Electronics and suitable for server PSUs, industrial DC-DC converters, and telecom AC-DC adapters requiring stable component supply, long-term manufacturability, and RoHS/halogen-free compliance.
Supply support for SF26G-T 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 power, automotive, and industrial markets since 1979.
The SF2xG-T series is part of TSC's Super Fast Rectifier product line, engineered specifically for high-efficiency, high-frequency switching power conversion in cost-sensitive, thermally constrained applications.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the SF26G-T?
The SF26G-T has a VRRM of 400 V, meaning it can reliably block up to 400 V in reverse bias without breakdown. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version C2105) and defines its safe operating window in flyback, forward, and freewheeling configurations where reverse voltage stress occurs.
What is the forward voltage drop (VF) of the SF26G-T at rated current?
The SF26G-T exhibits a typical forward voltage of 1.30 V at 2 A and 25°C junction temperature, as specified in the Electrical Specifications table. This value directly impacts conduction loss and thermal rise; actual VF increases with temperature and current, reaching ~1.45 V at 125°C per the forward characteristics curve.
Is the SF26G-T compatible with lead-free soldering processes?
Yes, the SF26G-T features pure tin-plated leads compliant with J-STD-002 for solderability and qualified for lead-free reflow profiles. Its DO-204AC package withstands peak temperatures up to 260°C for 10 seconds, meeting IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for standard surface-mount assembly.
Does the SF26G-T have a specified reverse recovery time (trr)?
Yes, the SF26G-T has a maximum reverse recovery time of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This parameter is explicitly listed in the Electrical Specifications section and confirms its classification as a super fast rectifier suitable for switching frequencies up to 500 kHz.
What is the junction-to-ambient thermal resistance (RθJA) of the SF26G-T?
The SF26G-T has a typical RθJA of 65°C/W when mounted on a standard FR-4 PCB with 1-inch² copper pad. This value is provided in the Thermal Performance section and is essential for estimating junction temperature rise under real-world power dissipation-e.g., at 2 A and 1.30 V VF, power loss is ~2.6 W, resulting in ~170°C rise above ambient if unmitigated.
SF26G-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF26G-T FAQ
1.How can I place an order for SF26G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF26G-T 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 SF26G-T reliable?
The price and inventory of SF26G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF26G-T is usually 5 days.
3.What payment methods are accepted for SF26G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF26G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF26G-T?
SF26G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF26G-T 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 SF26G-T?
For technical support, including SF26G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF26G-T requirements.
6.How does Aetrix verify that SF26G-T is sourced from the original manufacturer or authorized distributors?
All SF26G-T 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 SF26G-T meets industry standards.
7.What is the process for return or replacement of SF26G-T?
All SF26G-T units undergo pre-shipment inspection (PSI). If there is an issue with SF26G-T, 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 SF26G-T part is unused and in its original packaging.
Return procedure for SF26G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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