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Taiwan Semiconductor Corporation SF27G B0G
- Part No.:
- SF27G B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF27G B0G.pdf
- Description:
- DIODE GEN PURP 500V 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,659
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Product details
Overview
SF27G from Taiwan Semiconductor is a 2 A, 500 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 1.70 V forward voltage at 2 A and 25°C, 20 pF junction capacitance at 1 MHz/4 V, and 50 A surge capability - used in high-frequency switching power supplies and freewheeling paths.
For engineers reviewing the SF27G datasheet, SF27G pinout, SF27G application, or SF27G equivalent, key selection criteria include peak reverse voltage rating (500 V), fast trr (≤35 ns), thermal resistance (RθJA = 65°C/W), and AEC-Q101 qualification availability in variant SF27GH.
Technical Context
This super fast rectifier employs a glass-passivated silicon junction to achieve low conduction loss and rapid carrier recombination. Its 35 ns reverse recovery time enables operation in high-frequency DC–DC converters up to several hundred kHz without excessive switching loss.
The device operates across –55°C to +150°C junction temperature range with 16°C/W junction-to-case thermal resistance, supporting reliable thermal management in compact, convection-cooled designs where DO-15 footprint constraints apply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - supports input rectification or output freewheeling in 400 V DC bus systems with 25% safety margin |
| IF | 2 A continuous - delivers rated current in TO-220-sized footprint with minimal heatsinking |
| IFSM | 50 A (8.3 ms half-sine) - withstands inrush and transient surges in SMPS startup and fault conditions |
| trr | 35 ns - enables efficient operation in 200–500 kHz switching topologies with reduced turn-off loss |
| VF | 1.70 V @ 2 A, 25°C - contributes ≤3.4 W conduction loss per diode at full load |
| CJ | 20 pF @ 1 MHz, 4 V - minimizes capacitive coupling and EMI generation in high-dV/dt environments |
| RθJA | 65°C/W - allows ~23°C rise above ambient at 2 A continuous in standard PCB layout (1 in² copper) |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode (banded end) | Current exit terminal during forward conduction; reverse-blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive or input bulk rail) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable leakage performance under humidity and thermal cycling |
| Super fast recovery (trr ≤ 35 ns) | Reduces switching loss and EMI in high-frequency SMPS versus standard fast rectifiers (≥75 ns) |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and environmental requirements for automotive and industrial end equipment |
| AEC-Q101 qualified option (SF27GH) | Validated for automotive-grade stress testing including HTGB, HTRB, and temperature cycling |
Applications
| DC–DC Converter Output Rectification | Switch-Mode Power Supply Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 12–48 V at up to 2 A. IC Role / Device Role / Timing Role: Unidirectional current valve enabling energy transfer from transformer secondary to output capacitor. Use Value: 35 ns trr limits reverse recovery charge (Qrr) to <15 nC, reducing cross-conduction loss when paired with MOSFET switches. | Use Scenario: Freewheeling path across inductive loads in non-isolated buck or boost regulators operating at 200–400 kHz. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during high-side switch off-time. Use Value: 1.70 V VF and 20 pF CJ jointly minimize conduction loss and high-frequency ringing, improving efficiency and EMI signature. |
| Automotive Body Control Module Power | Industrial AC–DC Adapter Input Stage |
Use Scenario: 12 V system auxiliary power supply in BCMs requiring AEC-Q101 compliance and surge robustness. IC Role / Device Role / Timing Role: Input bridge or output rectifier handling cold-crank (4.5 V) to load-dump (40 V) transients. Use Value: 50 A IFSM and –55°C to +150°C TJ rating ensure operational integrity across automotive temperature and surge profiles. | Use Scenario: Primary-side input rectification in universal-input (85–265 VAC) offline adapters rated ≤30 W. IC Role / Device Role / Timing Role: Converts AC line to pulsating DC prior to bulk capacitor filtering. Use Value: 500 V VRRM provides 2× margin over 265 VAC peak (375 V), ensuring safe operation under overvoltage conditions. |
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 | Same 2 A / 600 V rating; trr = 35 ns; VF = 1.7 V @ 2 A; DO-15 package | Qualified to AEC-Q101 Grade 0; slightly higher RθJA (70°C/W) | Preferred where extended temperature validation or ST ecosystem alignment is required |
| ON Semi MUR260 | 2 A / 600 V; trr = 35 ns; VF = 1.75 V @ 2 A; same DO-15 footprint | Not AEC-Q101 qualified; RoHS compliant but not halogen-free per IEC 61249-2-21 | Cost-sensitive industrial designs where halogen-free and automotive qualification are not mandated |
Compared with STTH2R06 and MUR260, SF27G offers identical electrical performance and mechanical compatibility while providing halogen-free construction and optional AEC-Q101 qualification (SF27GH), making it suitable for automotive and green-electronics programs where both material compliance and stress validation matter.
Availability
SF27G is available at Aetrix Electronics and suitable for DC–DC converter output rectification, switching mode power supply freewheeling, and automotive body control module power applications requiring stable component supply and consistent DO-15 lead-forming.
Supply support for SF27G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.
The SF2xG series was designed specifically for high-efficiency, high-reliability power conversion in space-constrained applications - emphasizing fast recovery, low VF, and robust surge capability in standard axial packages.
FAQ
What is the maximum repetitive peak reverse voltage rating of SF27G?
The SF27G has a maximum repetitive peak reverse voltage (VRRM) rating of 500 V. This value is specified in the Absolute Maximum Ratings table and confirmed across all revision versions of the official Taiwan Semiconductor datasheet (H2105). The 500 V rating ensures safe operation in 400 V DC bus systems with adequate derating margin. SF27G must not be operated beyond this voltage under repetitive conditions.
What is the forward voltage drop of SF27G at 2 A and 25°C?
The forward voltage (VF) of SF27G is 1.70 V at 2 A and 25°C, as specified in the Electrical Specifications table under "SF27G SF28G" grouping. This value is measured under pulsed conditions (PW = 0.3 ms) and represents typical conduction loss behavior. At elevated junction temperatures, VF decreases slightly due to negative temperature coefficient of silicon diodes.
Is SF27G AEC-Q101 qualified?
SF27G itself is not AEC-Q101 qualified; however, the variant SF27GH is explicitly qualified per AEC-Q101. The datasheet states "AEC-Q101 qualified available" and confirms the "H" suffix denotes AEC-Q101 qualification. Therefore, SF27G is suitable for industrial applications, while SF27GH meets automotive stress-test requirements including HTGB, HTRB, and temperature cycling.
What is the reverse recovery time (trr) specification for SF27G?
The reverse recovery time (trr) for SF27G is 35 ns maximum, tested under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is shared across SF25G–SF28G in the Electrical Specifications table and defines the device's suitability for high-frequency switching applications up to ~500 kHz without excessive dynamic loss.
What package type does SF27G use, and what are its key mechanical features?
SF27G uses the DO-204AC (DO-15) axial-leaded package. Key mechanical features include glass passivation for junction protection, pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, cathode band polarity marking, and a typical weight of 0.400 g. The package meets JESD 201 Class 2 whisker resistance requirements.
SF27G B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 500 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 500 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF27G B0G FAQ
1.How can I place an order for SF27G B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF27G B0G 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 SF27G B0G reliable?
The price and inventory of SF27G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF27G B0G is usually 5 days.
3.What payment methods are accepted for SF27G B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF27G B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF27G B0G?
SF27G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF27G B0G 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 SF27G B0G?
For technical support, including SF27G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF27G B0G requirements.
6.How does Aetrix verify that SF27G B0G is sourced from the original manufacturer or authorized distributors?
All SF27G B0G 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 SF27G B0G meets industry standards.
7.What is the process for return or replacement of SF27G B0G?
All SF27G B0G units undergo pre-shipment inspection (PSI). If there is an issue with SF27G B0G, 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 SF27G B0G part is unused and in its original packaging.
Return procedure for SF27G B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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