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Diodes Incorporated SF30AG-T
- Part No.:
- SF30AG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF30AG-T.pdf
- Description:
- DIODE GEN PURP 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:5,793
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Product details
Overview
SF30AG-T from Diodes Incorporated is a 3.0A, 50V super-fast glass passivated rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 0.95V forward voltage at 3.0A, and 125A non-repetitive peak surge current. It serves as a primary AC/DC input rectifier in offline switch-mode power supplies for consumer adapters and industrial AC-DC modules.
For engineers reviewing the SF30AG-T datasheet, SF30AG-T pinout, SF30AG-T application, or SF30AG-T equivalent, key selection criteria include reverse recovery speed for high-frequency efficiency, thermal resistance (32°C/W) for ambient-limited PCB layouts, and DO-201AD mechanical compatibility with legacy through-hole rectifier footprints.
Technical Context
This super-fast rectifier uses a diffused junction and glass passivated die construction to achieve low reverse leakage (5.0μA at 25°C) and stable switching performance up to 100°C junction temperature. Its 35ns trr and 75pF typical capacitance support operation in 50–100kHz SMPS front-end stages without excessive switching loss.
The device is rated for single-phase, half-wave, 60Hz resistive or inductive loads, with derating required for capacitive loads (−20% current). Forward current derating begins at 55°C ambient, maintaining 3.0A up to that point per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage; defines safe blocking capability in AC line rectification |
| IO @ TA=55°C | 3.0 A - Average forward current rating at 55°C ambient; requires heatsinking or airflow above this temperature |
| VFM @ IF=3.0A | 0.95 V - Forward voltage drop; determines conduction loss (2.85W at full load) |
| trr | 35 ns - Reverse recovery time; enables efficient operation in 50–100kHz SMPS without snubber circuits |
| IFSM | 125 A - Non-repetitive surge rating; withstands inrush currents during cold-start of power supplies |
| RθJA | 32 °C/W - Junction-to-ambient thermal resistance; sets minimum copper area needed on PCB for thermal management |
| IRM @ 25°C | 5.0 μA - Peak reverse leakage; ensures minimal standby power loss in no-load conditions |
Pinout & Package
DO-201AD package: axial-leaded, molded plastic case with cathode band marking; lead finish is matte tin, solderable per MIL-STD-202 Method 208; weight ≈1.12 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | AC input connection | Accepts incoming AC waveform; must be routed with adequate creepage for 50V RMS applications |
| Cathode (Lead 2, banded end) | DC output connection | Delivers rectified positive DC; polarity-sensitive placement critical for proper circuit function |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable long-term reliability under humidity and thermal cycling, meeting J-STD-020C Level 1 moisture sensitivity |
| Super-fast switching (35ns trr) | Reduces switching losses in high-frequency rectification, improving efficiency over standard fast recovery diodes |
| 125A IFSM surge rating | Supports robust cold-start behavior in unregulated AC-DC inputs without fuse coordination issues |
| Low 0.95V VFM at 3.0A | Lowers conduction loss and thermal stress compared to 1.1V+ alternatives, easing thermal design |
| RoHS-compliant tin-plated leads | Ensures compatibility with lead-free reflow and wave soldering processes without post-process cleaning |
Applications
| AC-DC Adapter Input Rectification | Industrial SMPS Front-End |
|---|---|
Use Scenario: 5–24V output wall adapters for consumer electronics using 50/60Hz line input. IC Role / Device Role / Timing Role: Primary bridge or half-wave rectifier converting AC mains to pulsating DC before bulk capacitor filtering. Use Value: 35ns trr minimizes switching loss at 60Hz fundamental while supporting higher-frequency noise suppression. | Use Scenario: 24–48V industrial power supplies with wide-input AC range (85–264VAC). IC Role / Device Role / Timing Role: Input stage rectifier in dual-switch forward or flyback topologies operating at 60–100kHz. Use Value: 125A IFSM handles repeated inrush surges during hot-swap or brown-out recovery events. |
| LED Driver Bulk Rectification | UPS Input Stage |
Use Scenario: Constant-current LED drivers for commercial lighting with universal AC input. IC Role / Device Role / Timing Role: High-efficiency rectifier feeding PFC or buck-derived DC bus prior to LED current regulation. Use Value: 0.95V VFM reduces conduction loss in continuous conduction mode, improving overall driver efficiency. | Use Scenario: Line-interactive UPS systems requiring reliable input rectification during grid fluctuations. IC Role / Device Role / Timing Role: Main AC input rectifier handling both normal operation and transient overload conditions. Use Value: −65°C to +150°C operating range ensures functionality across extended industrial ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L05S | TO-220AC package, 3.0A/50V, trr = 30ns, VFM = 0.92V | Requires heatsink mounting; unsuitable for space-constrained DO-201AD footprints | Select when higher surge margin or forced-air cooling is available and board real estate permits TO-220 footprint |
| ES3D-E3/57T | SMA package, 3.0A/200V, trr = 35ns, VFM = 1.25V | Higher VRRM but higher forward loss; surface-mount only, no axial leads | Choose for automated SMT assembly where 200V blocking is required and thermal budget allows +0.3V VFM penalty |
Compared with STTH3L05S and ES3D-E3/57T, SF30AG-T offers optimal balance of axial-leaded DO-201AD compatibility, 50V blocking, and low-loss 35ns switching-ideal for cost-sensitive, through-hole AC-DC designs where thermal headroom is limited.
Availability
SF30AG-T is available at Aetrix Electronics and suitable for AC-DC adapter input rectification, industrial SMPS front-end stages, and LED driver bulk rectification requiring stable component supply and tape-and-reel logistics for manual or semi-automated assembly.
Supply support for SF30AG-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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
SF30AG-T belongs to Diodes' SFx0AG–JG super-fast rectifier family, designed specifically for high-efficiency, high-reliability AC-DC conversion in cost-sensitive, thermally constrained power supplies.
FAQ
Is SF30AG-T RoHS compliant and lead-free?
Yes, SF30AG-T features lead-free, RoHS-compliant tin-plated leads per EU Directive Annex Notes 5 and 7, with high-temperature solder exemption applied. It meets J-STD-020C Level 1 moisture sensitivity and is qualified for lead-free reflow and wave soldering per MIL-STD-202 Method 208.
What is the maximum allowable junction temperature for SF30AG-T?
The absolute maximum junction temperature is +150°C, with storage temperature ranging from −65°C to +150°C. Derating begins at 55°C ambient per Figure 1; sustained operation above 150°C risks permanent parametric shift or catastrophic failure.
Can SF30AG-T replace a standard FR107 diode in an existing design?
Yes, SF30AG-T is a direct functional upgrade: both are DO-201AD axial devices rated 1000V PIV, but SF30AG-T offers lower VFM (0.95V vs ~1.3V), faster trr (35ns vs ~500ns), and higher IFSM (125A vs 30A), improving efficiency and surge resilience without footprint change.
Why is SF30AG-T marked "NOT RECOMMENDED FOR NEW DESIGN"?
Diodes Incorporated issued this notice due to newer-generation super-fast rectifiers (e.g., SB350–SB3100 series) offering improved trr/VFM trade-offs and enhanced thermal performance. SF30AG-T remains fully qualified and supported for legacy production and repair, with no obsolescence timeline published.
SF30AG-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF30AG-T FAQ
1.How can I place an order for SF30AG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF30AG-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 SF30AG-T reliable?
The price and inventory of SF30AG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF30AG-T is usually 5 days.
3.What payment methods are accepted for SF30AG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF30AG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF30AG-T?
SF30AG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF30AG-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 SF30AG-T?
For technical support, including SF30AG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF30AG-T requirements.
6.How does Aetrix verify that SF30AG-T is sourced from the original manufacturer or authorized distributors?
All SF30AG-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 SF30AG-T meets industry standards.
7.What is the process for return or replacement of SF30AG-T?
All SF30AG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF30AG-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 SF30AG-T part is unused and in its original packaging.
Return procedure for SF30AG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SF30AG-T Tags
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