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Taiwan Semiconductor Corporation SF38G
- Part No.:
- SF38G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF38G.pdf
- Description:
- DIODE GEN PURP 600V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,069
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Product details
Overview
SF38G from Taiwan Semiconductor is a 600V, 3A super fast rectifier diode in DO-201AD package, featuring 1.70V forward voltage at 3A and 35ns reverse recovery time, designed for high-efficiency DC-DC converters and switching inverters operating under high-frequency, high-surge conditions.
For engineers reviewing the SF38G datasheet, SF38G pinout, SF38G application, or SF38G equivalent, key selection criteria include its 600V repetitive peak reverse voltage, 125A surge rating, AEC-Q101 qualification option (SF38GH), junction-to-lead thermal resistance of 10°C/W, and cathode-band polarity marking for unambiguous PCB layout.
Technical Context
The SF38G employs a single-die silicon PN junction optimized for super-fast recovery (trr ≤ 35ns) to minimize switching losses in hard-switched topologies. Its 600V VRRM rating enables use in 400V DC bus systems with margin, while the 125A IFSM supports transient overloads in motor drives and UPS inverters.
Thermally, the DO-201AD package delivers RθJL = 10°C/W and RθJA = 35°C/W, enabling 3A continuous conduction at up to +125°C ambient when mounted on ≥1 cm² copper. Junction capacitance is 60pF at 4V reverse bias, supporting stable operation in >100kHz SMPS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports 400V DC-link applications with 50% safety margin |
| IF | 3 A - rated average forward current at TA = 75°C with adequate heatsinking |
| VF @ 3A, 25°C | 1.70 V - determines conduction loss: ~5.1W max at full load |
| trr | 35 ns - enables efficient operation in 100–500 kHz switching converters |
| IFSM | 125 A - withstands short-circuit surges in industrial power supplies |
| RθJL | 10 °C/W - allows direct lead-to-heatsink thermal path for compact layouts |
| IR @ 600V, 125°C | 100 µA - ensures low leakage in high-temperature freewheeling paths |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by a painted band; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 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 in buck converter) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; blocks 600V reverse voltage |
Key Features
| Feature | Design Value |
|---|---|
| Super-fast recovery (trr ≤ 35 ns) | Reduces switching loss and EMI in high-frequency SMPS above 200 kHz |
| 600 V VRRM rating | Enables use in 400 V nominal DC bus systems including solar inverters and EV chargers |
| 125 A IFSM surge capability | Survives line transients and motor startup currents without degradation |
| AEC-Q101 qualified variant available (SF38GH) | Validated for automotive under-hood temperature cycling and vibration stress |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with EU environmental directives and enables lead-free reflow assembly |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Isolated flyback and forward converters in telecom power supplies delivering 12–48 V outputs from 300–400 V DC input. IC Role / Device Role / Timing Role: Output rectifier handling 3 A continuous current with minimal conduction and switching loss. Use Value: 1.70 V VF and 35 ns trr reduce total power loss by ≥15% vs. standard fast rectifiers at 250 kHz. | Use Scenario: Single-phase H-bridge inverters in UPS and solar microinverters converting 350–450 V DC to 230 V AC. IC Role / Device Role / Timing Role: Freewheeling diode across IGBTs/MOSFETs during dead-time commutation. Use Value: 600 V VRRM and 125 A IFSM ensure robustness against voltage spikes and shoot-through transients. |
| Industrial Motor Drives | Automotive On-Board Chargers |
Use Scenario: Regenerative braking circuits in 24–48 V BLDC motor controllers requiring bidirectional energy recovery. IC Role / Device Role / Timing Role: Reverse-polarity protection and regen path clamp diode. Use Value: 150°C TJ max and 10°C/W RθJL allow operation in sealed enclosures without forced air cooling. | Use Scenario: Secondary-side synchronous rectification in 6.6 kW OBCs converting 400 V battery to 14 V auxiliary supply. IC Role / Device Role / Timing Role: High-reliability output rectifier qualified per AEC-Q101 (SF38GH variant). Use Value: Halogen-free, RoHS-compliant construction meets automotive material compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-3EYH06-M3/45 | Same DO-201AD package, 600 V VRRM, but VF = 1.85 V @ 3 A (higher conduction loss) | Higher VF increases thermal stress in high-duty-cycle applications | Prefer SF38G where efficiency or thermal headroom is critical |
| ON Semiconductor MUR360G | 600 V VRRM, 3 A IF, but trr = 50 ns (slower recovery) and VF = 1.75 V | Higher trr increases switching loss and EMI in >300 kHz designs | Prefer SF38G for high-frequency SMPS where fast recovery is essential |
Compared with VS-3EYH06-M3/45 and MUR360G, the SF38G delivers the lowest combined conduction (1.70 V VF) and switching (35 ns trr) losses in the 600 V/3 A super fast rectifier class, making it optimal for thermally constrained, high-frequency power conversion.
Availability
SF38G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, freewheeling circuits, and automotive on-board chargers requiring stable component supply with consistent parametric performance across production lots.
Supply support for SF38G 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 for industrial and automotive markets.
The SF38G belongs to TSC's SF3xG super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding applications.
FAQ
What is the maximum junction temperature rating for the SF38G?
The SF38G has a maximum junction temperature (TJ MAX) of +150°C, verified per JEDEC JESD22-A108. This rating allows continuous operation at full 3 A current in ambient temperatures up to +125°C when mounted on ≥1 cm² copper area. Derating curves in the official SF38G datasheet confirm usable current remains above 2.2 A at +100°C ambient. The SF38G must be operated within this limit to maintain reliability and avoid parametric shift.
Does the SF38G have AEC-Q101 qualification?
The base SF38G is not AEC-Q101 qualified; however, the variant SF38GH is explicitly qualified per AEC-Q101 Rev D for automotive applications. SF38GH undergoes extended temperature cycling, mechanical shock, and humidity testing per the standard. For non-automotive industrial use, SF38G is fully suitable; for under-hood or safety-critical automotive systems, only SF38GH should be selected. Both share identical electrical specs and DO-201AD packaging.
What is the reverse recovery time (trr) specification for the SF38G?
The SF38G has a maximum reverse recovery time (trr) of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC test conditions. This value is confirmed across production lots and is critical for minimizing switching loss in high-frequency converters. The SF38G achieves this via optimized carrier lifetime control in its epitaxial structure, distinguishing it from standard fast rectifiers with trr > 50 ns.
How is polarity marked on the SF38G package?
The SF38G uses a cathode band - a single painted stripe near one lead end - to indicate the cathode terminal. This marking complies with JEDEC DO-201AD standards and is visible under standard optical inspection. The unbanded lead is the anode. Polarity must be observed during PCB layout to prevent reverse-bias failure; incorrect orientation results in immediate conduction and potential thermal runaway at rated voltage.
What is the thermal resistance from junction to lead (RθJL) for the SF38G?
The SF38G has a typical junction-to-lead thermal resistance (RθJL) of 10°C/W, measured per JEDEC JESD51-14. This low value enables effective heat transfer from the die directly into PCB copper or external heatsinks via the leads. When used with 1 cm² of 2 oz copper connected to both leads, the SF38G sustains 3 A continuous current at +75°C ambient without exceeding 150°C junction temperature.
SF38G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF38G FAQ
1.How can I place an order for SF38G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF38G 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 SF38G reliable?
The price and inventory of SF38G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF38G is usually 5 days.
3.What payment methods are accepted for SF38G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF38G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF38G?
SF38G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF38G 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 SF38G?
For technical support, including SF38G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF38G requirements.
6.How does Aetrix verify that SF38G is sourced from the original manufacturer or authorized distributors?
All SF38G 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 SF38G meets industry standards.
7.What is the process for return or replacement of SF38G?
All SF38G units undergo pre-shipment inspection (PSI). If there is an issue with SF38G, 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 SF38G part is unused and in its original packaging.
Return procedure for SF38G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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