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Diodes Incorporated SF30BG-T
- Part No.:
- SF30BG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF30BG-T.pdf
- Description:
- DIODE GEN PURP 100V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
SF30BG-T from Diodes Incorporated is a 3.0A, 100V super-fast glass passivated rectifier diode in DO-201AD package, featuring 125A non-repetitive peak forward surge current, 0.95V forward voltage at 3.0A, and 35ns reverse recovery time. 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 SF30BG-T datasheet, SF30BG-T pinout, SF30BG-T application, or SF30BG-T equivalent, key selection criteria include its 100V VRRM rating, 35ns trr for high-frequency operation, thermal resistance of 32°C/W, and RoHS-compliant tin-plated leads suitable for lead-free reflow soldering.
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 across -65°C to +150°C operating range. Its 35ns reverse recovery time is measured under standardized conditions (IF = 0.5A, IR = 1.0A, Irr = 0.25A), enabling efficient operation in 50–100kHz SMPS topologies.
The device's DO-201AD package provides mechanical robustness with UL 94V-0 flammability rating and moisture sensitivity level 1. Thermal derating follows a defined curve: full 3.0A IO is rated at TA = 55°C, decreasing linearly to zero at ~150°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage before breakdown; sets safe AC input voltage limit (e.g., ≤70V RMS). |
| IO @ TA=55°C | 3.0 A - Continuous average forward current capability at 55°C ambient; requires heatsinking above this temperature. |
| VFM @ IF=3.0A | 0.95 V - Forward voltage drop defining conduction loss (≈2.85W at 3A); impacts efficiency and thermal design. |
| trr | 35 ns - Reverse recovery time determining switching loss and EMI in high-frequency rectification. |
| IFSM (8.3ms) | 125 A - Surge withstand capability during cold-start or line transients; supports robust input stage protection. |
| RθJA | 32 °C/W - Junction-to-ambient thermal resistance; used to calculate junction temperature rise under real PCB layout conditions. |
| IRM @ 25°C | 5.0 μA - Low reverse leakage ensures minimal standby power loss in no-load or light-load conditions. |
Pinout & Package
DO-201AD package: axial-leaded, molded plastic case with cathode band marking; polarity identified by single black band on cathode end; tin-plated leads compliant with MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC input phase or transformer secondary; must handle full surge current path. |
| Cathode | Forward current exit / DC output node | Feeds bulk capacitor or PFC stage; low-inductance layout critical due to fast trr. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable long-term reliability under humidity and thermal cycling without hermetic sealing. |
| Super-fast 35ns trr | Reduces switching losses vs. standard rectifiers (e.g., 1N4007: >2μs), improving efficiency in 50–100kHz designs. |
| 125A IFSM surge rating | Withstands 100+ cold-start cycles without degradation, eliminating need for external NTC or fusing in many adapter designs. |
| RoHS-compliant tin finish | Supports lead-free reflow profiles (peak 260°C) without dewetting or intermetallic formation issues. |
Applications
| AC-DC Adapter Input Rectification | Industrial SMPS Primary-Side Rectification |
|---|---|
Use Scenario: 12–24V output wall adapters for routers, IP cameras, and IoT gateways operating from 90–264VAC input. IC Role / Device Role / Timing Role: Primary-side bridge or half-wave rectifier converting AC line to pulsating DC prior to bulk capacitance. Use Value: 0.95V VFM minimizes conduction loss at 3A load; 35ns trr reduces EMI generation during high-frequency switching transitions. | Use Scenario: 48V/5A industrial power modules powering PLC I/O cards and sensor interfaces. IC Role / Device Role / Timing Role: Input rectifier in flyback or forward converter front-end handling continuous 3A output with transient surges. Use Value: 125A IFSM rating eliminates need for redundant parallel diodes; DO-201AD allows manual or automated through-hole assembly. |
| LED Driver Bulk Rectification | UPS Battery Charger Input Stage |
Use Scenario: Constant-current LED drivers for street lighting and commercial signage with universal AC input. IC Role / Device Role / Timing Role: High-efficiency rectifier feeding active PFC or buck-derived topology. Use Value: Low 5.0μA IRM at 25°C prevents excessive standby power draw; 100V VRRM accommodates 85VAC brownout conditions. | Use Scenario: Online UPS systems requiring reliable AC input rectification during grid fluctuations and battery backup transitions. IC Role / Device Role / Timing Role: Main rectifier in dual-conversion topology handling both utility and inverter-sourced input. Use Value: -65°C to +150°C Tj range ensures operation under elevated ambient temperatures inside sealed UPS enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | 600V VRRM, 3.0A IO, 50ns trr, TO-220AC package | Higher voltage rating but slower recovery; requires heatsink mounting | Select when >100V reverse stress or higher surge margin is required; not drop-in due to package and thermal interface. |
| ON Semi MUR320 | 200V VRRM, 3.0A IO, 35ns trr, DO-201AD package | Same footprint and speed, but higher VRRM increases cost and slightly raises VFM (~1.05V) | Use where system-level overvoltage transients exceed 100V; identical layout and solder process. |
Compared with STTH3L06S and MUR320, SF30BG-T offers optimal balance of 100V rating, 35ns speed, and DO-201AD manufacturability-making it preferred for cost-sensitive, space-constrained 100V-class AC-DC inputs where thermal budget permits.
Availability
SF30BG-T is available at Aetrix Electronics and suitable for AC-DC adapter design, industrial SMPS development, and LED driver production requiring stable component supply and tape-and-reel automation compatibility.
Supply support for SF30BG-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 and manufacturing operations across Asia and the US.
The SF30xG series belongs to Diodes' high-reliability rectifier product line, engineered specifically for cost-effective, high-volume AC-DC front-end applications demanding consistent surge tolerance and thermal stability.
FAQ
What is the maximum allowable junction temperature for SF30BG-T?
The absolute maximum junction temperature is +150°C, with storage temperature matching this range. Derating begins at TA = 55°C per the forward current curve; sustained operation above 125°C junction requires verified thermal design including PCB copper area and airflow.
Is SF30BG-T suitable for use in synchronous rectification circuits?
No - SF30BG-T is a unidirectional silicon PN junction rectifier, not a MOSFET-based synchronous device. It lacks gate control and cannot be actively switched; it functions only as a passive, voltage-polarity-dependent conductor.
How does the 35ns reverse recovery time impact EMI in a 65kHz flyback converter?
A 35ns trr limits high-frequency ringing energy during turn-off, reducing common-mode noise above 10MHz. Measured data shows >10dB lower radiated emissions vs. 500ns rectifiers under identical layout and load, easing EMC compliance.
Can SF30BG-T replace SF30AG-T in an existing design?
Yes - both share identical DO-201AD package, thermal characteristics, and pinout. SF30BG-T has 100V VRRM vs. SF30AG-T's 50V, offering higher reverse margin without layout change; forward voltage and trr are identical at rated current.
SF30BG-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):
- 100 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 @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF30BG-T FAQ
1.How can I place an order for SF30BG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF30BG-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 SF30BG-T reliable?
The price and inventory of SF30BG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF30BG-T is usually 5 days.
3.What payment methods are accepted for SF30BG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF30BG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF30BG-T?
SF30BG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF30BG-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 SF30BG-T?
For technical support, including SF30BG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF30BG-T requirements.
6.How does Aetrix verify that SF30BG-T is sourced from the original manufacturer or authorized distributors?
All SF30BG-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 SF30BG-T meets industry standards.
7.What is the process for return or replacement of SF30BG-T?
All SF30BG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF30BG-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 SF30BG-T part is unused and in its original packaging.
Return procedure for SF30BG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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