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Taiwan Semiconductor Corporation SF28G B0G
- Part No.:
- SF28G B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF28G B0G.pdf
- Description:
- DIODE GEN PURP 600V 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,559
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Product details
Overview
SF28G from Taiwan Semiconductor is a 2 A, 600 V super fast rectifier diode in DO-204AC (DO-15) package, featuring 1.70 V forward voltage at 2 A and 35 ns reverse recovery time. It delivers high surge current capability (50 A), low power loss, and operates up to 150 °C junction temperature-used in high-efficiency DC-DC converters and switching inverters.
For engineers reviewing the SF28G datasheet, SF28G pinout, SF28G application, or SF28G equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, 1.70 V VF at 2 A, 35 ns trr, 20 pF junction capacitance at 1 MHz/4 V, and AEC-Q101 qualification availability (SF28GH variant).
Technical Context
The SF28G employs a glass passivated single-die silicon junction optimized for fast switching in high-voltage, medium-current applications. Its 600 V VRRM rating and 35 ns reverse recovery time enable efficient operation in hard-switched topologies where voltage overshoot and switching losses must be minimized.
Thermal performance is defined by RθJA = 65 °C/W and RθJC = 16 °C/W, supporting reliable conduction at 2 A continuous forward current with proper PCB copper area. The device exhibits IR ≤ 5 µA at 25 °C and ≤ 100 µA at 125 °C under rated reverse voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports input stages in 400 V AC rectification or 300–450 V DC bus systems |
| IF | 2 A continuous - suitable for medium-power SMPS outputs and freewheeling paths |
| VF @ 2 A, 25°C | 1.70 V - contributes ~3.4 W conduction loss at full load, requiring thermal management |
| trr | 35 ns - enables operation up to ~3–5 MHz switching frequencies with low recovery loss |
| CJ @ 1 MHz, 4 V | 20 pF - minimizes capacitive coupling noise in high-dv/dt gate-drive or snubber circuits |
| IFSM (8.3 ms) | 50 A - withstands startup surges and short-circuit transients in industrial power supplies |
| TJ max | 150 °C - allows operation in sealed enclosures or high-ambient environments without derating |
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 (unbanded end) | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return in flyback secondary) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or positive bus; blocks 600 V reverse voltage during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability and moisture resistance in humid or automotive under-hood environments |
| AEC-Q101 qualified option (SF28GH) | Validated for automotive powertrain and body electronics per stress test requirements |
| UL 94V-0 molding compound | Meets flame-retardancy standards for safety-critical industrial and medical auxiliary power supplies |
| Halogen-free per IEC 61249-2-21 | Complies with RoHS and environmental directives for green manufacturing and end-of-life processing |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24–48 V output DC-DC converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: Unidirectional current conduction and energy transfer during transformer reset phase. Use Value: 35 ns trr and 1.70 V VF minimize switching and conduction losses, improving efficiency by ≥0.8% over standard fast rectifiers at 200 kHz. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during high-side switch off-time. Use Value: 600 V VRRM withstands inductive kickback spikes; 50 A IFSM handles transient overload without failure. |
| Industrial AC-DC Front-End | Automotive On-Board Charger Auxiliary Supply |
Use Scenario: Input bridge rectification in universal-input (90–264 V AC) industrial PSUs with PFC stage. IC Role / Device Role / Timing Role: Converts AC line to high-voltage DC bus while sustaining repetitive 600 V reverse stress. Use Value: 150 °C TJ max and 65 °C/W RθJA allow stable operation without heatsink in compact 15–30 W designs. | Use Scenario: Auxiliary 12 V supply rectification in OBC modules, exposed to under-hood ambient up to 105 °C. IC Role / Device Role / Timing Role: High-reliability rectifier in isolated flyback or forward converter powering control logic. Use Value: AEC-Q101-qualified SF28GH variant ensures qualification for automotive temperature cycling, vibration, and lifetime testing. |
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; VF = 1.7 V typical, trr = 35 ns, DO-15 package | Qualified to AEC-Q101 Grade 0; slightly higher RθJA (70 °C/W) | Preferred where automotive qualification is mandatory and ST's supply chain is preferred |
| ES2D | 2 A / 200 V rating; VF = 0.95 V, trr = 35 ns, same DO-15 package | Limited to ≤200 V applications; unsuitable for 400 V bus systems | Select only for cost-sensitive, low-voltage (<200 V) consumer power supplies |
Compared with STTH2R06, SF28G offers lower thermal resistance (65 vs. 70 °C/W) and halogen-free compliance; compared with ES2D, SF28G provides triple the VRRM rating but higher VF-making it essential for 600 V industrial and EV auxiliary systems where voltage margin is critical.
Availability
SF28G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial AC-DC front-ends requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for SF28G 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, specializing in power rectifiers, TVS diodes, and MOSFETs since 1979.
The SF21G–SF28G series was designed specifically for high-efficiency, high-reliability power conversion in industrial, computing, and automotive auxiliary power applications-emphasizing fast recovery, thermal robustness, and environmental compliance.
FAQ
What is the maximum junction temperature rating for SF28G?
The SF28G has a maximum junction temperature (TJ max) of 150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version H2105). This allows sustained operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood auxiliary converters when mounted on adequate copper area. Derating begins above 25 °C ambient per the forward current derating curve in Figure 1.
Is SF28G pin-compatible with other DO-204AC rectifiers like SF26G or STTH2R06?
Yes, SF28G uses the standard DO-204AC (DO-15) axial package with anode/cathode polarity marked by a cathode band, making it mechanically and electrically pin-compatible with all DO-15 rectifiers including SF26G and STTH2R06. No PCB layout change is required for substitution-however, electrical differences (e.g., VF, trr, VRRM) must be validated in the target circuit.
Does SF28G meet automotive qualification standards?
The base SF28G is not AEC-Q101 qualified, but the SF28GH variant-identical in electrical specs and DO-15 packaging-is explicitly qualified per AEC-Q101. Taiwan Semiconductor's ordering code table confirms "H" denotes AEC-Q101 qualification. For automotive applications, specify SF28GH to ensure compliance with stress testing for temperature cycling, humidity, and mechanical shock.
What is the reverse leakage current specification for SF28G at elevated temperature?
Per the Electrical Specifications table, SF28G exhibits IR ≤ 5 µA at TJ = 25 °C and ≤ 100 µA at TJ = 125 °C under rated reverse voltage. This low leakage supports stable operation in high-impedance feedback networks and reduces standby power loss in energy-efficient power supplies using SF28G in auxiliary winding rectification.
How does the junction capacitance of SF28G affect EMI performance in high-frequency SMPS?
SF28G has a typical junction capacitance (CJ) of 20 pF at 1 MHz and 4 V reverse bias. This low value minimizes displacement current during high-dv/dt switching transitions, reducing common-mode EMI generation in flyback and LLC resonant converters. Combined with its 35 ns trr, this enables cleaner turn-off waveforms and relaxed filtering requirements compared to standard recovery diodes with >50 pF CJ.
SF28G B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 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 @ 600 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
SF28G B0G FAQ
1.How can I place an order for SF28G B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF28G 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 SF28G B0G reliable?
The price and inventory of SF28G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF28G B0G is usually 5 days.
3.What payment methods are accepted for SF28G B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF28G B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF28G B0G?
SF28G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF28G 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 SF28G B0G?
For technical support, including SF28G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF28G B0G requirements.
6.How does Aetrix verify that SF28G B0G is sourced from the original manufacturer or authorized distributors?
All SF28G 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 SF28G B0G meets industry standards.
7.What is the process for return or replacement of SF28G B0G?
All SF28G B0G units undergo pre-shipment inspection (PSI). If there is an issue with SF28G 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 SF28G B0G part is unused and in its original packaging.
Return procedure for SF28G B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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