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Diodes Incorporated SF30BG-B
- Part No.:
- SF30BG-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF30BG-B.pdf
- Description:
- DIODE GEN PURP 100V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:9,319
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Product details
Overview
SF30BG-B from Diodes Incorporated is a 3.0A, 100V peak repetitive reverse voltage (VRRM) super-fast glass passivated rectifier diode in DO-201AD package, featuring 35ns reverse recovery time (trr), 1.3V forward voltage at 3.0A, and 125A non-repetitive surge rating - used in high-frequency AC/DC front-end rectification for switch-mode power supplies.
For engineers reviewing the SF30BG-B datasheet, SF30BG-B pinout, SF30BG-B application, or SF30BG-B equivalent, key selection criteria include VRRM = 100V, trr = 35ns, IO = 3.0A @ TA = 55°C, low leakage (IR = 5.0µA @ 25°C), and DO-201AD thermal resistance (RθJA = 32°C/W).
Technical Context
This super-fast rectifier employs a diffused junction and glass passivated die construction to achieve rapid carrier recombination, enabling efficient operation in 50–100kHz SMPS designs where reverse recovery loss must be minimized. Its 35ns trr and low 75pF capacitance support reduced switching noise and EMI in high-density converters.
The device operates across –65°C to +150°C with cathode-band polarity marking and tin-plated leads compliant with MIL-STD-202 solderability. Derating is required for capacitive loads (–20% current) and ambient temperatures above 55°C per the forward current derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum peak reverse voltage before breakdown; defines safe operating limit in bridge or single-phase rectifier circuits. |
| IO | 3.0 A @ TA = 55°C - Average rectified output current under specified thermal conditions; requires heatsinking or airflow above 55°C ambient. |
| trr | 35 ns - Reverse recovery time measured at IF = 0.5A, IR = 1.0A, Irr = 0.25A; enables high-frequency switching with low turn-off loss. |
| VF | 1.3 V @ IF = 3.0A - Forward voltage drop determining conduction loss and thermal dissipation in continuous operation. |
| IR | 5.0 µA @ 25°C - Reverse leakage current at rated DC blocking voltage; low value minimizes standby power loss in offline supplies. |
| RθJA | 32 °C/W - Junction-to-ambient thermal resistance; defines temperature rise per watt of power dissipation in free-air mounting. |
Pinout & Package
Package: DO-201AD molded plastic case (UL 94V-0), 1.12g weight, cathode band polarity marking, tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to AC input or transformer secondary; must handle 3.0A average and 125A surge peaks. |
| Cathode | Current exit terminal during forward conduction | Marked by band; connects to bulk capacitor or downstream regulator; carries full rectified current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances moisture resistance and long-term reliability in humid industrial environments without hermetic sealing. |
| Super-fast switching (35ns trr) | Reduces reverse recovery loss and associated EMI in 50–100kHz SMPS, improving efficiency over standard rectifiers. |
| 125A surge rating (8.3ms) | Withstands inrush currents from cold-started capacitive inputs and transient line surges without failure. |
| Low IR (5.0µA @ 25°C) | Minimizes standby power consumption in energy-sensitive applications such as EPS and IoT power adapters. |
Applications
| AC/DC Adapter Front-End | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Rectifying 50/60Hz or high-frequency AC from transformer secondaries in universal-input wall adapters. IC Role / Device Role / Timing Role: Primary-side unidirectional current controller converting AC to pulsating DC prior to filtering. Use Value: 35ns trr and 1.3V VF reduce conduction and switching losses, enabling compact 15–30W adapter designs meeting CoC Tier 2 efficiency. |
Use Scenario: High-reliability rectification in 100–500W industrial switch-mode power supplies with wide ambient temperature range. IC Role / Device Role / Timing Role: Main input rectifier in voltage-doubler or full-wave bridge configurations handling continuous 3.0A load. Use Value: Glass passivation and –65°C to +150°C rating ensure stable operation in factory automation equipment exposed to thermal cycling and humidity. |
| LED Driver Bulk Rectification | UPS Input Stage |
Use Scenario: Converting line voltage to DC bus for constant-current LED drivers in outdoor signage and street lighting. IC Role / Device Role / Timing Role: First-stage rectifier feeding PFC or buck-boost converter; subjected to frequent on/off cycling. Use Value: 125A surge capability absorbs repeated cold-start surges from large electrolytic banks, extending system lifetime. |
Use Scenario: Input rectification in online/double-conversion UPS systems requiring high availability and fault tolerance. IC Role / Device Role / Timing Role: Critical path component in AC-to-DC conversion stage; failure causes immediate system shutdown. Use Value: Low RθJA (32°C/W) and robust DO-201AD package enable reliable thermal management without forced air in enclosed UPS chassis. |
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 | VRRM = 600V, trr = 35ns, VF = 1.7V @ 3A - higher voltage rating but higher forward drop. | Used where higher reverse standoff is needed (e.g., 400VDC bus); less efficient at 100V-class designs due to higher VF. | Select when system requires >100V VRRM; avoid if optimizing for low-loss 100V rectification. |
| ES3B | VRRM = 100V, trr = 35ns, VF = 1.25V @ 3A - identical voltage/speed, slightly lower VF, SMC package. | SMC footprint offers better thermal performance than DO-201AD but requires PCB layout change; not drop-in compatible. | Choose for improved thermal design margin if board space allows SMC; verify mechanical fit and solder profile. |
Compared with STTH3L06S and ES3B, SF30BG-B provides optimal balance of 100V VRRM, 35ns speed, and DO-201AD manufacturability - making it preferred for cost-sensitive, high-volume 100V rectifier applications where legacy through-hole assembly is retained.
Availability
SF30BG-B is available at Aetrix Electronics and suitable for AC/DC adapters, industrial SMPS, LED drivers, and UPS systems requiring stable component supply with consistent DO-201AD packaging and bulk delivery format.
Supply support for SF30BG-B 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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
SF30BG-B belongs to Diodes' SF30xG super-fast rectifier product line, engineered specifically for high-efficiency, high-frequency AC/DC conversion in cost-sensitive power supplies where fast recovery and thermal robustness are critical.
FAQ
Is SF30BG-B RoHS compliant?
Yes, SF30BG-B features lead-free finish and complies with RoHS Directive 2011/65/EU (Revision 13.2.2003), including exemption for high-temperature soldering per EU Annex Notes 5 and 7. Tin-plated leads meet MIL-STD-202 solderability requirements.
What is the maximum allowable junction temperature for SF30BG-B?
The absolute maximum junction temperature is +150°C, with storage temperature ranging from –65°C to +150°C. Operation above 55°C ambient requires current derating per Figure 1 in the datasheet, and thermal design must ensure TJ ≤ 150°C under worst-case load and ambient conditions.
Can SF30BG-B replace SF30AG-B in existing designs?
Yes, SF30BG-B is a direct functional replacement for SF30AG-B with identical DO-201AD package, pinout, and thermal characteristics - differing only in VRRM (100V vs. 50V) and corresponding VF (1.3V vs. 0.95V). Verify circuit reverse voltage stress does not exceed 100V before substitution.
Does SF30BG-B support surface-mount assembly?
No - SF30BG-B is supplied in DO-201AD axial-leaded through-hole package and is not designed for SMT reflow. It requires wave soldering or hand-soldering. For SMT alternatives, consider ES3B (SMC) or similar SMD super-fast rectifiers with matching electrical specs.
SF30BG-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Bulk
- 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:
- 75pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF30BG-B FAQ
1.How can I place an order for SF30BG-B through Aetrix?
Please submit a Request for Quotation (RFQ) for SF30BG-B 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-B reliable?
The price and inventory of SF30BG-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF30BG-B is usually 5 days.
3.What payment methods are accepted for SF30BG-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF30BG-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF30BG-B?
SF30BG-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF30BG-B 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-B?
For technical support, including SF30BG-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF30BG-B requirements.
6.How does Aetrix verify that SF30BG-B is sourced from the original manufacturer or authorized distributors?
All SF30BG-B 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-B meets industry standards.
7.What is the process for return or replacement of SF30BG-B?
All SF30BG-B units undergo pre-shipment inspection (PSI). If there is an issue with SF30BG-B, 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-B part is unused and in its original packaging.
Return procedure for SF30BG-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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