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Diodes Incorporated SF20BG-T
- Part No.:
- SF20BG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF20BG-T.pdf
- Description:
- DIODE GEN PURP 100V 2A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:4,635
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Product details
Overview
SF20BG-T from Diodes Incorporated is a 2.0A super-fast glass passivated rectifier diode with 100V peak repetitive reverse voltage (VRRM), 60A non-repetitive surge rating, and 35ns reverse recovery time (trr), designed for high-frequency switching power supplies and AC/DC front-end rectification in industrial SMPS.
For engineers reviewing the SF20BG-T datasheet, SF20BG-T pinout, SF20BG-T application, or SF20BG-T equivalent, key selection criteria include VRRM, trr, forward voltage at 2.0A, thermal resistance, and DO-15 package compatibility in space-constrained board layouts.
Technical Context
This super-fast rectifier employs glass passivated die construction to achieve low reverse leakage (10µA @ 25°C) and stable performance across -65°C to +150°C operating range. Its 35ns reverse recovery time enables efficient operation in 50–100kHz switch-mode topologies without excessive switching loss.
The device uses a single-phase, half-wave rectification configuration with defined derating for capacitive loads (20% current reduction). Thermal resistance of 40°C/W (junction-to-ambient) requires careful PCB copper area planning under 2.0A continuous load at 75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage before breakdown; sets usable input voltage ceiling in bridge or single-diode rectifier stages. |
| IO | 2.0 A @ TA = 75°C - Continuous average forward current rating; requires heatsinking or layout derating above this ambient temperature. |
| trr | 35 ns - Measured at IF = 0.5A, IR = 1.0A, Irr = 0.25A; enables high-frequency operation with minimal switching loss and EMI generation. |
| VFM | 1.3 V @ IF = 2.0A - Forward voltage drop directly impacts conduction loss and thermal design in high-current paths. |
| IFSM | 60 A (8.3ms half-sine) - Surge capability supports inrush current handling during cold-start or line transients in offline converters. |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance; defines required PCB copper area and airflow for thermal management at full load. |
Pinout & Package
Package: DO-15 molded plastic case (UL 94V-0), cathode indicated by band, lead-free tin finish, weight ≈ 0.35 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC input or transformer secondary; polarity-sensitive in bridge configurations. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; connects to output capacitor or DC bus; reverse voltage applied here during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable reverse leakage (<10µA @ 25°C) and long-term reliability under humidity and thermal cycling. |
| Super-fast recovery (35ns) | Reduces switching loss and diode-induced ringing in 50–200kHz SMPS designs compared to standard rectifiers (≥500ns). |
| 60A surge rating | Supports repeated cold-start events in AC/DC adapters without degradation, eliminating need for external NTC or inrush limiters. |
| DO-15 package | Standard through-hole footprint compatible with legacy wave-solder processes and manual rework; no SMT reflow profile needed. |
Applications
| AC/DC Adapter Front-End | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Rectifying 50/60Hz AC mains into DC bus prior to PFC or PWM controller stage in wall-wart adapters. IC Role / Device Role / Timing Role: Primary-side unidirectional current path; blocks reverse voltage during negative half-cycle. Use Value: 35ns trr minimizes reverse recovery charge (Qrr) and associated losses, improving efficiency over standard FR107-class diodes. |
Use Scenario: Input rectification in 100–500W industrial switch-mode power supplies with active PFC. IC Role / Device Role / Timing Role: High-current, high-reliability rectifier in discrete bridge or single-diode configuration. Use Value: 60A IFSM withstands repeated inrush surges during system power-up without parameter shift or failure. |
| UPS Battery Charger Input | LED Driver Bulk Rectification |
Use Scenario: Converting utility AC to DC for battery charging circuitry in line-interactive UPS systems. IC Role / Device Role / Timing Role: Main AC input rectifier subjected to frequent grid interruptions and voltage sags. Use Value: -65°C to +150°C operating range ensures functionality during extended battery discharge heating and cold storage conditions. |
Use Scenario: Off-line LED driver rectifying AC input before HV buck or flyback stage in commercial lighting. IC Role / Device Role / Timing Role: High-efficiency bulk rectifier where conduction loss directly affects thermal budget and lumen maintenance. Use Value: 1.3V VFM at 2.0A reduces power dissipation vs. 1.7V alternatives, lowering heatsink requirements in enclosed fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R06 | VRRM = 600V, trr = 35ns, VFM = 1.7V @ 2A, DO-15 | Higher blocking voltage but higher forward drop; suited for universal-input (>265VAC) designs. | Select when >100V reverse stress is expected; avoid if optimizing for conduction loss at 100V-class inputs. |
| ES2D | VRRM = 200V, trr = 35ns, VFM = 1.25V @ 2A, SMA package | SMA surface-mount package; lower VFM but reduced surge rating (50A) and thermal resistance (65°C/W). | Choose for automated SMT assembly and tighter board space; verify thermal margin with PCB copper area. |
Compared with STTH2R06 and ES2D, SF20BG-T offers optimal balance of 100V blocking, 1.3V conduction loss, and 60A surge robustness in through-hole DO-15 format-ideal for cost-sensitive, thermally managed industrial AC/DC designs.
Availability
SF20BG-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial switch-mode power supplies, and LED driver bulk rectification requiring stable component supply and long-lifecycle support.
Supply support for SF20BG-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 and signal integrity solutions for industrial, computing, and consumer markets.
SF20BG-T belongs to the SF20xG super-fast rectifier product line, engineered for high-efficiency, high-reliability AC/DC conversion in cost-sensitive, thermally constrained applications.
FAQ
Is SF20BG-T still in production?
No-SF20BG-T is officially obsolete per Diodes Incorporated's DS24013 Rev. 4 (February 2015). It is discontinued with no direct replacement announced. Aetrix Electronics maintains limited legacy stock for ongoing production support and last-time buys, subject to availability verification.
What is the maximum allowable junction temperature for SF20BG-T?
The absolute maximum junction temperature is +150°C, and the storage temperature range is identical. Operation at or near this limit requires strict thermal design: 40°C/W RθJA implies ≤75°C ambient at full 2.0A load unless additional heatsinking or forced airflow is applied.
Can SF20BG-T replace SF20AG-T in existing designs?
Yes-both share identical DO-15 package, pinout, and thermal characteristics. The only difference is VRRM: SF20AG-T is rated for 50V, while SF20BG-T is rated for 100V. Substitution is safe if reverse voltage in the circuit stays below 50V; otherwise, SF20BG-T provides added margin.
Does SF20BG-T meet RoHS requirements?
Yes-SF20BG-T features lead-free finish and complies with RoHS Directive 2002/95/EC (as revised March 2003), including exemption for high-temperature soldering per EU Directive Annex Notes 5 and 7.
SF20BG-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):
- 100 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 100 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
SF20BG-T FAQ
1.How can I place an order for SF20BG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF20BG-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 SF20BG-T reliable?
The price and inventory of SF20BG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF20BG-T is usually 5 days.
3.What payment methods are accepted for SF20BG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF20BG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF20BG-T?
SF20BG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF20BG-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 SF20BG-T?
For technical support, including SF20BG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF20BG-T requirements.
6.How does Aetrix verify that SF20BG-T is sourced from the original manufacturer or authorized distributors?
All SF20BG-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 SF20BG-T meets industry standards.
7.What is the process for return or replacement of SF20BG-T?
All SF20BG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF20BG-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 SF20BG-T part is unused and in its original packaging.
Return procedure for SF20BG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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