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Taiwan Semiconductor Corporation SF28G-T
- Part No.:
- SF28G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF28G-T.pdf
- Description:
- 35NS, 2A, 600V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:3,948
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Product details
Overview
SF28G-T 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 - ideal for high-efficiency DC-DC converters and switching inverters.
For engineers reviewing the SF28G-T datasheet, SF28G-T pinout, SF28G-T application, or SF28G-T equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, 35 ns trr, 1.70 V VF at 2 A, thermal resistance (RθJA = 65 °C/W), and DO-204AC mechanical compatibility in space-constrained power stages.
Technical Context
The SF28G-T employs a glass-passivated single-die silicon junction optimized for fast switching in high-voltage SMPS topologies. Its 600 V VRRM rating supports primary-side rectification in offline converters, while the 35 ns reverse recovery time enables operation at frequencies up to several hundred kHz without excessive switching loss.
Thermally, it features RθJC = 16 °C/W and RθJA = 65 °C/W, enabling 2 A continuous conduction with minimal heatsinking in ambient temperatures up to 75 °C. The cathode-band polarity marking and pure tin-plated leads ensure reliable soldering per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports primary-side rectification in universal-input AC/DC supplies |
| IF | 2 A continuous - suitable for medium-power DC-DC outputs and auxiliary rails |
| trr | 35 ns - enables efficient operation at ≥200 kHz switching frequencies |
| VF @ 2 A | 1.70 V - contributes to <1.5 W conduction loss at full load |
| IFSM | 50 A - withstands inrush and transient surges in industrial power systems |
| TJ max | 150 °C - allows operation in sealed enclosures or high-ambient environments |
| CJ @ 1 MHz | 20 pF - minimizes capacitive coupling noise in high-dV/dt circuits |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with UL 94V-0 rating and cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., switch node or ground return) |
| Cathode (Lead 2) | Current exit terminal during forward conduction | Marked with band; connects to output rail or positive bus in freewheeling paths |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability under humidity and thermal cycling stress |
| Low VF (1.70 V @ 2 A) | Reduces conduction loss by ~15% vs. standard FR107-class diodes at same current |
| 35 ns reverse recovery | Minimizes switching loss and EMI generation in hard-switched converters |
| RoHS & halogen-free | Complies with IEC 61249-2-21; suitable for consumer and industrial green programs |
| 50 A IFSM rating | Supports robust startup and fault tolerance in unregulated power stages |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side synchronous or non-synchronous rectification in isolated 24–48 V output DC-DC modules. IC Role / Device Role / Timing Role: Unidirectional current path enabling energy transfer from transformer secondary to output capacitor. Use Value: 1.70 V VF and 35 ns trr reduce total losses by >0.8 W vs. slower 600 V diodes at 2 A/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 recirculation path during high-side switch off-time. Use Value: 600 V VRRM withstands reflected inductive spikes; 50 A IFSM handles motor stall currents. |
| Offline SMPS Primary Clamp Diode | Industrial Power Supply Input Bridge Leg |
Use Scenario: Clamp diode in RCD snubber networks for flyback or forward converter MOSFETs. IC Role / Device Role / Timing Role: Absorbs leakage inductance energy during MOSFET turn-off. Use Value: 600 V rating matches 650 V MOSFETs; fast trr prevents energy re-injection into the switch. | Use Scenario: Single leg of a discrete bridge rectifier in 3-phase or high-voltage single-phase industrial PSUs. IC Role / Device Role / Timing Role: Conducts half-wave rectified current with minimal conduction drop and thermal rise. Use Value: DO-204AC form factor allows direct replacement of legacy 600 V rectifiers; 150 °C TJ max supports derating in enclosed cabinets. |
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 600 V VRRM, 2 A IF, but VF = 1.75 V @ 2 A; trr = 30 ns; TO-220AC package | Larger footprint; better thermal dissipation but requires PCB real estate and mounting hardware | Prefer when board-level thermal management allows TO-220 and tighter trr is critical |
| ES2D | 600 V VRRM, 2 A IF, VF = 1.7 V @ 2 A, trr = 35 ns, same DO-204AC package | Identical mechanical fit; slightly higher IR (10 µA @ 25 °C vs. 5 µA for SF28G-T) | Drop-in alternative where leakage sensitivity is low and supply chain diversification is needed |
Compared with STTH2R06 and ES2D, the SF28G-T offers the lowest leakage (5 µA), identical trr, and smallest footprint - making it optimal for compact, thermally constrained, low-noise offline power supplies where leakage-induced standby loss matters.
Availability
SF28G-T is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for SF28G-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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power and automotive markets since 1979.
The SF28G-T belongs to TSC's SFxG-T super fast rectifier family, designed specifically for high-efficiency, high-reliability AC/DC and DC/DC conversion in industrial and consumer power supplies.
FAQ
What is the maximum junction temperature rating for the SF28G-T?
The SF28G-T has a maximum junction temperature (TJ max) of +150 °C, allowing operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood auxiliary converters. This rating is validated per JEDEC test conditions and supports derating curves up to 75 °C ambient at full 2 A load when mounted on standard FR-4 PCB with 1-inch² copper pour.
Does the SF28G-T have a specified reverse recovery time, and how is it measured?
Yes, the SF28G-T has a typical reverse recovery time (trr) of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC standard test conditions. This value is confirmed across production lots and applies directly to the SF28G-T - not extrapolated from lower-voltage variants in the SF2xG-T series.
Is the SF28G-T RoHS compliant and halogen-free?
Yes, the SF28G-T is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and the pure tin-plated leads meet J-STD-002 solderability requirements. Certificate of Compliance is available upon request for SF28G-T shipments.
What is the forward voltage drop of the SF28G-T at rated current?
The SF28G-T exhibits a maximum forward voltage (VF) of 1.70 V at 2 A and 25 °C junction temperature, as specified in the electrical characteristics table. This value is measured under pulse conditions (PW = 0.3 ms) and remains stable across the full operating temperature range up to 125 °C.
Can the SF28G-T replace the SF27G-T in an existing design?
Yes, the SF28G-T can directly replace the SF27G-T (500 V) in most designs, provided the circuit's peak reverse voltage does not exceed 500 V - the SF28G-T's 600 V rating provides additional margin. No layout or biasing changes are required, as both share identical DO-204AC packaging, pinout, thermal specs, and forward characteristics.
SF28G-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for SF28G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF28G-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 SF28G-T reliable?
The price and inventory of SF28G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF28G-T is usually 5 days.
3.What payment methods are accepted for SF28G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF28G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF28G-T?
SF28G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF28G-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 SF28G-T?
For technical support, including SF28G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF28G-T requirements.
6.How does Aetrix verify that SF28G-T is sourced from the original manufacturer or authorized distributors?
All SF28G-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 SF28G-T meets industry standards.
7.What is the process for return or replacement of SF28G-T?
All SF28G-T units undergo pre-shipment inspection (PSI). If there is an issue with SF28G-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 SF28G-T part is unused and in its original packaging.
Return procedure for SF28G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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