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Diodes Incorporated SF20GG-T
- Part No.:
- SF20GG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF20GG-T.pdf
- Description:
- DIODE GEN PURP 400V 2A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
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Product details
Overview
SF20GG-T from Diodes Incorporated is a 2.0A, 400V peak repetitive reverse voltage super-fast glass passivated rectifier diode in DO-15 package, with 35ns reverse recovery time, 1.3V forward voltage at 2.0A, and 10µA reverse leakage at 25°C - used in high-frequency AC/DC adapters and switch-mode power supply output stages.
For engineers reviewing the SF20GG-T datasheet, SF20GG-T pinout, SF20GG-T application, or SF20GG-T equivalent, key selection criteria include VRRM=400V, trr=35ns, [email protected], IRM=10µA@25°C, and DO-15 thermal resistance of 40°C/W for reliable conduction in compact power converters.
Technical Context
This super-fast rectifier employs glass passivated die construction to achieve low reverse leakage and stable switching performance under repetitive surge conditions up to 60A (8.3ms half-sine). Its 35ns reverse recovery time enables efficient operation in 50–500kHz SMPS topologies without excessive switching loss.
The device operates across –65°C to +150°C junction temperature range and exhibits 75pF typical junction capacitance at 4V reverse bias and 1MHz - critical for minimizing EMI in high-frequency rectification paths where capacitive coupling affects noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum non-repetitive reverse voltage the diode blocks reliably in circuit; defines safe operating margin against line transients in 230VAC-derived supplies. |
| IO @ TA=75°C | 2.0 A - continuous average forward current rating at 75°C ambient; requires heatsinking or airflow if ambient exceeds 75°C. |
| trr | 35 ns - measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables use in >200kHz flyback and forward converters without significant tail-current loss. |
| VFM @ IF=2.0A | 1.3 V - forward voltage drop determining conduction loss (2.6W at 2.0A); lower than standard fast rectifiers (e.g., UF4007: ~1.7V). |
| IRM @ 25°C | 10 µA - reverse leakage at rated DC blocking voltage; ensures minimal standby power loss in offline auxiliary supplies. |
| RθJA | 40 °C/W - junction-to-ambient thermal resistance in DO-15 package; sets temperature rise per watt dissipated when leads are held at ambient 9.5mm from case. |
| CT @ 1MHz | 75 pF - junction capacitance at 4V reverse bias; impacts high-frequency ringing and EMI filter design in secondary-side rectification. |
Pinout & Package
DO-15 molded plastic package with axial leads, cathode band marking, tin-plated terminals, UL 94V-0 flammability rating, and moisture sensitivity level 1. Weight: 0.35 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to transformer secondary or switching node; must withstand peak inverse voltage during off-state. |
| Cathode | Forward current exit / output node | Connected to output capacitor and load; polarity marked by band; determines output voltage reference in unidirectional rectification. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable trr and IRM over temperature and lifetime; eliminates need for silicone gel encapsulation in humid environments. |
| 60A non-repetitive surge rating | Withstands inrush currents from cold-started capacitive inputs without degradation - critical for universal-input AC/DC front-ends. |
| RoHS-compliant lead finish | Tin-plated terminals meet MIL-STD-202 solderability requirements and support lead-free reflow profiles up to 260°C. |
| Low thermal resistance | 40°C/W RθJA allows 2.0A operation at 75°C ambient without forced cooling - simplifies thermal design in space-constrained adapters. |
Applications
| AC/DC Adapter Output Stage | USB-C PD Power Supply Secondary |
|---|---|
Use Scenario: Rectifying high-frequency transformer output in 20–65W offline adapters with universal input (90–264VAC). IC Role / Device Role / Timing Role: Super-fast rectifier replacing standard FR series; conducts during positive half-cycle while blocking reverse voltage during flyback reset. Use Value: 35ns trr reduces switching loss vs. 75ns FR207, improving efficiency by ~0.8% at 100kHz in 36W adapter benchmarks. |
Use Scenario: Secondary-side synchronous rectification replacement in 45W USB-C PD chargers using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Uncontrolled rectifier in fixed-frequency or QR flyback output stage; handles 2.0A continuous load with minimal voltage drop. Use Value: 1.3V VFM at 2.0A lowers conduction loss by 0.8W vs. UF4007 (1.7V), reducing secondary-side thermal stress in sealed enclosures. |
| Industrial SMPS Auxiliary Supply | LED Driver Output Rectification |
Use Scenario: Providing isolated 12V/200mA auxiliary bias for gate drivers and controllers in 1–3kW industrial inverters. IC Role / Device Role / Timing Role: Low-leakage rectifier in low-power auxiliary winding; operates continuously at elevated ambient temperatures (>70°C). Use Value: 10µA IRM at 25°C and 100µA at 100°C minimizes no-load power draw, supporting Energy Star Level VI standby compliance. |
Use Scenario: Rectifying constant-current LED driver output in outdoor streetlight modules exposed to –40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-reliability output rectifier handling pulsed LED current with transient surges from lightning-induced grid spikes. Use Value: 60A IFSM rating absorbs 10/1000µs surge events without failure, extending field life in ungrounded outdoor installations. |
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 | VRRM=400V, trr=35ns, VFM=1.3V@2A, but TO-220AC package (RθJA=30°C/W) and higher cost. | Requires PCB footprint change and heatsink mounting; better for >5W continuous dissipation. | Select when thermal budget exceeds DO-15 capability or board layout allows TO-220 mounting. |
| UF204 | VRRM=400V, trr=50ns, VFM=1.3V@2A, DO-15, but IRM=50µA@25°C - 5× higher leakage. | Higher leakage increases standby loss; unsuitable for Energy Star-compliant auxiliary supplies. | Acceptable only in cost-sensitive, non-regulated, or low-temperature applications where leakage is not constrained. |
Compared with STTH2R04 and UF204, SF20GG-T delivers optimal balance of DO-15 form factor, 35ns speed, 10µA leakage, and 40°C/W thermal resistance - making it preferred for space-constrained, high-efficiency, thermally managed 2–5W auxiliary and adapter outputs.
Availability
SF20GG-T is available at Aetrix Electronics and suitable for AC/DC adapters, USB-C PD power supplies, industrial auxiliary SMPS, and LED driver output stages requiring stable component supply with consistent parametric performance across production lots.
Supply support for SF20GG-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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.
SF20GG-T belongs to the SF20xG super-fast rectifier product line, engineered specifically for high-frequency switching power supplies where low trr, low VFM, and robust surge capability are essential for efficiency and reliability.
FAQ
Is SF20GG-T still in active production?
No - SF20GG-T was officially discontinued by Diodes Incorporated in February 2015, as stated in DS24013 Rev. 4. It is obsolete with no direct replacement offered. Aetrix Electronics maintains limited legacy stock for design continuity and repair programs, subject to availability.
Can SF20GG-T be used in place of UF4007?
Yes, with design validation: both are DO-15 2A rectifiers, but SF20GG-T has faster trr (35ns vs. 75ns) and lower VFM (1.3V vs. 1.7V), improving efficiency. However, its 400V VRRM matches UF4007, so voltage rating is identical - verify layout thermal margins due to differing RθJA (40°C/W vs. 50°C/W).
What is the maximum allowable junction temperature for SF20GG-T?
The absolute maximum junction temperature is +150°C, per the datasheet's Tj specification. Derating begins at 75°C ambient - at 100°C ambient, IO drops to ~1.4A. Thermal design must ensure TJ ≤ 150°C under worst-case conduction and surge conditions.
Does SF20GG-T support lead-free reflow soldering?
Yes - its tin-plated terminals comply with RoHS and are qualified for lead-free reflow per J-STD-020C Level 1 moisture sensitivity. Peak temperature tolerance is 260°C for 10 seconds, matching standard Pb-free process profiles without delamination or solder joint degradation.
SF20GG-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 40 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- 75pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF20GG-T FAQ
1.How can I place an order for SF20GG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF20GG-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 SF20GG-T reliable?
The price and inventory of SF20GG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF20GG-T is usually 5 days.
3.What payment methods are accepted for SF20GG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF20GG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF20GG-T?
SF20GG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF20GG-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 SF20GG-T?
For technical support, including SF20GG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF20GG-T requirements.
6.How does Aetrix verify that SF20GG-T is sourced from the original manufacturer or authorized distributors?
All SF20GG-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 SF20GG-T meets industry standards.
7.What is the process for return or replacement of SF20GG-T?
All SF20GG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF20GG-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 SF20GG-T part is unused and in its original packaging.
Return procedure for SF20GG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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