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Taiwan Semiconductor Corporation SF38GH
- Part No.:
- SF38GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF38GH.pdf
- Description:
- DIODE GEN PURP 600V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
SF38GH from Taiwan Semiconductor is an AEC-Q101-qualified 3A, 600V super fast rectifier diode in DO-201AD package, featuring 1.70V forward voltage at 3A/25°C, 35ns reverse recovery time, and 125A surge capability - deployed in automotive DC-DC converters and industrial switching inverters.
For engineers reviewing the SF38GH datasheet, SF38GH pinout, SF38GH application, or SF38GH equivalent, key selection criteria include peak reverse voltage (600V), thermal resistance (RθJL = 10°C/W), junction temperature range (–55°C to +150°C), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This single-die silicon rectifier uses optimized epitaxial structure and controlled lifetime reduction to achieve sub-35ns reverse recovery while sustaining 600V blocking capability. Its low Qrr and tight trr distribution support high-frequency switching up to 100 kHz in hard-switched topologies.
The device operates with 5µA max reverse leakage at 25°C and 100µA at 125°C, and exhibits 60pF junction capacitance at 4V reverse bias - enabling efficient freewheeling and snubberless operation in compact power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports primary-side rectification in 400V DC bus systems with 50% safety margin |
| IF | 3 A continuous - delivers rated current without derating up to 90°C ambient with PCB copper area ≥1 cm² |
| IFSM | 125 A (8.3 ms half-sine) - withstands inrush surges in motor drive startup and capacitor charging |
| VF | 1.70 V @ 3 A, 25°C - contributes ≤5.1 W conduction loss per diode in 3A load path |
| trr | 35 ns - enables >100 kHz switching with minimal switching loss and EMI generation |
| RθJL | 10 °C/W - allows direct lead-to-heatsink thermal path for improved power density in TO-220 footprint-compatible layouts |
| Junction Temp | –55°C to +150°C - qualified for under-hood automotive environments and industrial enclosures |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter freewheel path) |
| Cathode (banded end) | Current exit point during forward conduction; reverse-blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive in boost rectifier) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications per stress test requirements |
| Super fast recovery (35 ns) | Reduces switching losses by >40% vs. standard rectifiers in 50–100 kHz SMPS designs |
| Low VF (1.70 V) | Lowers conduction loss in high-current paths where thermal management is constrained |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing |
| 125 A surge rating | Supports transient overload handling without bond wire fusing in industrial motor drives |
Applications
| Automotive DC-DC Converters | Industrial Switching Inverters |
|---|---|
Use Scenario: 12V-to-48V bidirectional converter in 48V mild hybrid vehicles. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck-boost stage, conducting during low-side switch off-time. Use Value: 35ns trr minimizes reverse recovery charge injection, reducing gate driver stress on Si MOSFETs and improving efficiency above 50 kHz. | Use Scenario: Output rectification in 3-phase IGBT-based VFDs for HVAC compressors. IC Role / Device Role / Timing Role: Snubberless freewheeling diode across IGBT collector-emitter during turn-off. Use Value: 600V VRRM and 125A IFSM ensure robustness against inductive kickback transients up to 1 kV overshoot. |
| Server PSU Secondary Side | Renewable Energy Charge Controllers |
Use Scenario: OR-ing diode in redundant 12V server power supply outputs. IC Role / Device Role / Timing Role: Unidirectional current valve preventing backfeed between parallel PSUs. Use Value: 1.70V VF limits power dissipation to <5W at 3A, enabling compact heatsink-less layout in dense 1U chassis. | Use Scenario: Battery charging path isolation in solar MPPT controllers with LiFePO4 banks. IC Role / Device Role / Timing Role: Reverse polarity and overvoltage protection diode in PV-to-battery path. Use Value: –55°C to +150°C operating range ensures reliable start-up in desert daytime and arctic nighttime 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 |
|---|---|---|---|
| STTH3L06S | 600V, 3A, 50ns trr, TO-220AC package, no AEC-Q101 | Higher trr increases switching loss in >60 kHz designs; larger footprint requires PCB rework | Preferred where cost sensitivity outweighs automotive qualification and high-frequency efficiency |
| ON Semi MUR360 | 600V, 3A, 35ns trr, DO-201AD, not AEC-Q101 qualified | Same package and speed but lacks automotive stress validation; limited to industrial use | Drop-in replacement for non-automotive designs requiring identical electrical performance and footprint |
Compared with STTH3L06S and MUR360, SF38GH uniquely combines AEC-Q101 qualification, DO-201AD form factor, and 35ns recovery - making it the only option qualified for automotive under-hood deployment without layout change or derating.
Availability
SF38GH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching inverters, and renewable energy charge controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SF38GH 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 automotive, industrial, and consumer markets since 1979.
The SF3xG series was developed specifically for high-reliability power conversion in harsh-environment applications, emphasizing AEC-Q101 compliance, low-loss fast recovery, and robust thermal performance in legacy axial packages.
FAQ
What is the maximum junction temperature rating for SF38GH?
The SF38GH has a maximum junction temperature (TJ) of +150°C, validated per AEC-Q101 stress testing. This rating enables operation in under-hood automotive environments and sealed industrial enclosures without active cooling. The device maintains specified electrical parameters up to this limit when thermal design accounts for RθJL = 10°C/W and ambient constraints. Derating curves in the SF38GH datasheet define safe operating current versus case temperature.
Is SF38GH pin-compatible with other SF3xG variants?
Yes, all SF3xG devices including SF38GH share identical DO-201AD package dimensions, lead spacing, and cathode band polarity marking. Mechanical interchangeability is guaranteed across the family. However, electrical parameters differ - SF38GH is rated for 600V VRRM and 1.70V VF, whereas SF31GH is 50V/0.95V. Substitution requires verification of voltage and thermal margins in the target circuit.
Does SF38GH require a heatsink in 3A continuous operation?
SF38GH can operate at 3A continuous without an external heatsink when mounted on ≥1 cm² of 2-oz copper on FR-4 PCB, assuming 25°C ambient and natural convection. With RθJA = 35°C/W, junction temperature rise is ~105°C - staying within the 150°C limit. For sustained 3A loads above 60°C ambient or in enclosed spaces, a small clip-on heatsink or increased copper area is recommended to maintain margin.
What does the 'H' suffix in SF38GH signify?
The 'H' suffix in SF38GH indicates full AEC-Q101 qualification per Rev H2105 specification. This includes temperature cycling, high-temperature operating life, unbiased high-humidity storage, and mechanical shock testing required for automotive power electronics. Non-H variants (e.g., SF38G) lack this validation and are restricted to industrial or consumer applications per TSC's ordering documentation.
How does SF38GH's reverse recovery time compare to standard rectifiers?
SF38GH achieves 35ns reverse recovery time (trr), which is 4–6× faster than standard 600V rectifiers (typically 150–250ns). This reduces reverse recovery charge (Qrr) and associated switching losses, especially critical in 50–100 kHz converters. Measured under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions, SF38GH's trr is tightly distributed and stable across temperature - unlike general-purpose diodes whose recovery degrades significantly above 85°C.
SF38GH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF38GH FAQ
1.How can I place an order for SF38GH through Aetrix?
Please submit a Request for Quotation (RFQ) for SF38GH 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 SF38GH reliable?
The price and inventory of SF38GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF38GH is usually 5 days.
3.What payment methods are accepted for SF38GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF38GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF38GH?
SF38GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF38GH 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 SF38GH?
For technical support, including SF38GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF38GH requirements.
6.How does Aetrix verify that SF38GH is sourced from the original manufacturer or authorized distributors?
All SF38GH 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 SF38GH meets industry standards.
7.What is the process for return or replacement of SF38GH?
All SF38GH units undergo pre-shipment inspection (PSI). If there is an issue with SF38GH, 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 SF38GH part is unused and in its original packaging.
Return procedure for SF38GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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