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Taiwan Semiconductor Corporation SF38G B0G
- Part No.:
- SF38G B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF38G B0G.pdf
- Description:
- DIODE GEN PURP 600V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:7,789
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Product details
Overview
SF38G from Taiwan Semiconductor is a 3A, 600V super fast rectifier diode in DO-201AD package, designed for high-efficiency DC-DC converters and switching inverters where low forward voltage (1.70V @ 3A, 25°C) and fast reverse recovery (35ns) minimize conduction and switching losses.
For engineers reviewing the SF38G datasheet, SF38G pinout, SF38G application, or SF38G equivalent, key selection criteria include peak repetitive reverse voltage (600V), surge current capability (125A), junction-to-lead thermal resistance (10°C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
The SF38G employs a single-die silicon PN junction optimized for super-fast recovery with trr ≤ 35ns under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions. Its 600V VRRM rating supports high-voltage flyback and PFC stages.
Thermally, it features RθJL = 10°C/W and RθJC = 9°C/W, enabling sustained 3A average forward current at lead temperatures up to 125°C per derating curves. The DO-201AD case uses UL 94V-0 molding compound and pure tin-plated leads compliant with J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Supports primary-side rectification in 400V AC-input PFC and offline SMPS designs |
| IF(AV) | 3 A - Sustained DC output current capability without forced cooling in TO-220 footprint alternatives |
| IFSM | 125 A - Withstands inrush surges in motor drive freewheeling and UPS battery charging circuits |
| VF @ 3A, 25°C | 1.70 V - Reduces conduction loss to ~5.1W at full load, critical for thermal management in compact converters |
| trr | 35 ns - Limits switching loss and EMI generation in 100–500 kHz hard-switched topologies |
| RθJL | 10 °C/W - Enables direct PCB copper pour heatsinking without additional thermal vias for <10W dissipation |
| Junction Temp | −55°C to +150°C - Rated for under-hood automotive environments and industrial ambient extremes |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; two-terminal device (anode and cathode) mounted via through-hole or surface-mount compatible lead form.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck sync rectifier or transformer secondary center-tap) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by colored band; ties to positive rail or output capacitor anode in standard rectifier configuration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option (SF38GH) | Validated for automotive powertrain and body electronics requiring zero-failure-rate reliability over 15-year service life |
| Low VF at high current | 1.70V @ 3A enables >92% efficiency in 12V/36W isolated DC-DC modules at full load |
| Ultra-fast trr ≤ 35ns | Reduces turn-off tail current, lowering EMI filter component count and board space in noise-sensitive applications |
| RoHS + halogen-free | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing and end-of-life recycling |
| 125A IFSM rating | Survives 10× rated current surges during cold-start or short-circuit events without bond wire fusing |
Applications
| DC-DC Converter Primary Rectification | Switching Inverter Freewheeling |
|---|---|
Use Scenario: High-voltage input (300–400V DC) isolated flyback converter supplying 12V/3A to industrial control logic. IC Role / Device Role / Timing Role: Primary-side super-fast rectifier replacing slower FR series to reduce switching loss and improve light-load efficiency. Use Value: 35ns trr cuts turn-off energy loss by 40% vs. standard fast recovery diodes, lowering MOSFET temperature rise by 12°C at 250kHz. | Use Scenario: Three-phase IGBT inverter driving 400V AC induction motor in HVAC blower system. IC Role / Device Role / Timing Role: Freewheeling diode across each IGBT leg to clamp inductive kickback during PWM dead-time. Use Value: 600V VRRM withstands bus transients; 125A IFSM handles motor stall currents without degradation. |
| Automotive On-Board Charger (OBC) | Industrial UPS Battery Charging Stage |
Use Scenario: Bidirectional OBC using dual active bridge topology with 600V SiC MOSFETs and synchronous rectification. IC Role / Device Role / Timing Role: Auxiliary snubber or clamp diode in high-side gate drive bootstrap circuit requiring ultra-fast recovery. Use Value: AEC-Q101 qualified SF38GH variant ensures compliance with ISO/TS 16949 production audits and 15-year field reliability targets. | Use Scenario: 48V telecom UPS front-end rectifier stage converting 380V DC bus to charge 48V LiFePO₄ battery bank. IC Role / Device Role / Timing Role: Output rectifier in phase-shifted full-bridge converter operating at 125kHz. Use Value: 10°C/W RθJL allows direct mounting to aluminum chassis, eliminating discrete heatsink and reducing BOM cost by $0.32/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S (STMicroelectronics) | Same 600V VRRM, 3A IF, but VF = 1.75V @ 3A; trr = 30ns; DO-201AD package | Marginally faster recovery but higher VF increases conduction loss by 0.15W at full load | Preferred where EMI filtering is more critical than thermal budget |
| ES3J (ON Semiconductor) | 600V VRRM, 3A IF, VF = 1.7V @ 3A, trr = 35ns, but not AEC-Q101 qualified; same DO-201AD | Lacks automotive qualification; suitable for industrial/commercial only | Lower-cost alternative when AEC-Q101 is not required |
Compared with STTH3L06S and ES3J, the SF38G offers identical speed and competitive VF while providing AEC-Q101 qualification in the GH variant-making it the sole choice for automotive OBC and ADAS power supplies requiring certified reliability.
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 across extended production lifecycles.
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 high-reliability rectifiers, TVS, and MOSFETs since 1979.
The SF31G–SF38G family was engineered specifically for high-frequency switching power supplies demanding robust surge immunity, low-loss rectification, and automotive-grade qualification-targeting EV infrastructure, industrial automation, and renewable energy systems.
FAQ
What is the maximum junction temperature rating for SF38G?
The SF38G has a maximum junction temperature (TJ MAX) of +150°C, validated across its full operating range from −55°C to +150°C. This rating enables deployment in under-hood automotive environments and high-ambient industrial enclosures. Derating curves in the official TSC datasheet (H2105) define safe average current limits versus lead temperature, with 3A permitted up to 125°C lead temperature. The SF38G must be operated within this thermal envelope to ensure long-term reliability and avoid parametric shift.
Is SF38G pin-compatible with other devices in the SF3xG series?
Yes, all SF3xG devices-including SF38G-share identical DO-201AD package dimensions, lead spacing, polarity marking (cathode band), and mechanical interface. They are mechanically interchangeable on PCBs, though electrical parameters differ: SF38G provides 600V VRRM and 1.70V VF, whereas SF31G offers 50V VRRM and 0.95V VF. Designers must verify voltage margin and thermal performance when substituting across the series, as VF and trr also vary by voltage grade.
Does SF38G meet automotive qualification standards?
The base SF38G is not AEC-Q101 qualified; however, the SF38GH variant-identical in all electrical and mechanical specifications except for added automotive stress testing-is fully AEC-Q101 qualified per revision H2105. SF38GH undergoes temperature cycling, humidity bias HAST, and accelerated life testing to validate reliability for automotive powertrain and body electronics. Always specify "SF38GH" when AEC-Q101 compliance is required.
What is the reverse recovery time (trr) test condition for SF38G?
The SF38G reverse recovery time is specified as ≤35ns under the standardized test condition: IF = 0.5A, IR = 1.0A, Irr = 0.25A, with measurement performed at TA = 25°C. This reflects real-world commutation behavior in hard-switched converters. The trr value is confirmed across the full SF35G–SF38G group and remains stable up to TJ = 125°C per TSC's characterization data. No derating is applied to the 35ns max value in design calculations.
How does SF38G's thermal resistance compare to industry-standard DO-201AD rectifiers?
The SF38G achieves RθJL = 10°C/W and RθJC = 9°C/W-matching or exceeding leading industry benchmarks for DO-201AD super fast rectifiers. For example, STTH3L06S specifies RθJL = 11°C/W, and ES3J lists RθJL = 12°C/W. This 10–20% lower thermal resistance directly translates to 3–5°C cooler junction operation at 3A, extending lifetime and improving efficiency in thermally constrained layouts.
SF38G B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- 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 B0G FAQ
1.How can I place an order for SF38G B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF38G 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 SF38G B0G reliable?
The price and inventory of SF38G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF38G B0G is usually 5 days.
3.What payment methods are accepted for SF38G B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF38G B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF38G B0G?
SF38G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF38G 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 SF38G B0G?
For technical support, including SF38G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF38G B0G requirements.
6.How does Aetrix verify that SF38G B0G is sourced from the original manufacturer or authorized distributors?
All SF38G 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 SF38G B0G meets industry standards.
7.What is the process for return or replacement of SF38G B0G?
All SF38G B0G units undergo pre-shipment inspection (PSI). If there is an issue with SF38G 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 SF38G B0G part is unused and in its original packaging.
Return procedure for SF38G B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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