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Taiwan Semiconductor Corporation SFT17G A1G
- Part No.:
- SFT17G A1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SFT17G A1G.pdf
- Description:
- DIODE GEN PURP 500V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:8,570
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Product details
Overview
SFT17G from Taiwan Semiconductor is a 1 A, 500 V super fast rectifier diode in TS-1 package, featuring 1.70 V forward voltage at 1 A and 25°C, 35 ns reverse recovery time, and 10 pF junction capacitance - deployed in high-frequency DC/DC converters and freewheeling paths where low switching loss and thermal stability are critical.
For engineers reviewing the SFT17G datasheet, SFT17G pinout, SFT17G application, or SFT17G equivalent, key selection criteria include its 500 V repetitive peak reverse voltage, AEC-Q101 qualification option (SFT17GH), 30 A surge rating, 150°C max junction temperature, and TS-1 package compatibility with automated assembly.
Technical Context
This super fast rectifier uses a single-die silicon PN junction optimized for high-speed switching in power conversion topologies. Its 35 ns trr and low 10 pF CJ enable efficient operation above 100 kHz, while the 1.70 V VF balances conduction loss and thermal rise under 1 A DC load.
The device operates across –55°C to +150°C junction range and achieves 100°C/W junction-to-ambient thermal resistance in standard PCB mounting. Polarity is marked by cathode band; terminals are pure tin-plated per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - supports input stages up to 350 V DC bus with 1.4× safety margin |
| IF | 1 A continuous - rated for steady-state output rectification in compact SMPS |
| IFSM | 30 A (8.3 ms) - withstands startup surges and transient overloads without failure |
| VF @ 1 A, 25°C | 1.70 V - determines conduction loss of 1.7 W at full load, guiding heatsink sizing |
| trr | 35 ns - enables >300 kHz switching in flyback and forward converters |
| CJ | 10 pF @ 4 V - minimizes capacitive turn-off loss and EMI generation |
| TJ max | 150°C - allows operation in sealed industrial enclosures without forced air |
Pinout & Package
TS-1 package: molded epoxy case meeting UL 94V-0, pure tin-plated leads, cathode indicated by band, weight ≈ 0.200 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., switch node in flyback secondary) |
| Cathode | Current exit point during forward conduction; polarity-marked terminal | Connected to output rail or filter capacitor positive; defines unidirectional current path |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr ≤ 35 ns) | Reduces switching losses and improves efficiency in 100–500 kHz converters |
| Low junction capacitance (10 pF) | Limits displacement current and dv/dt-induced false triggering in high-side gate drives |
| AEC-Q101 qualified variant available (SFT17GH) | Validated for automotive under-hood applications including ADAS power supplies |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with EU environmental directives and enables lead-free reflow processing |
| Junction temp range: –55°C to +150°C | Supports deployment in industrial motor drives and outdoor telecom power systems |
Applications
| DC/DC Converter Primary Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24 V → 5 V flyback converter powering FPGA I/O rails. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC, synchronized to MOSFET switching edge. Use Value: 35 ns trr prevents overlap conduction loss; 1.70 V VF limits thermal rise to <45°C rise at 1 A on 1-in² copper pour. | Use Scenario: Freewheeling path across IGBT in 3-phase 400 VAC motor inverter leg. IC Role / Device Role / Timing Role: Provides low-impedance return path for inductive current when IGBT turns off, clamping voltage spike. Use Value: 500 V VRRM withstands 650 V DC link transients; 30 A IFSM absorbs 2× motor stall current surges. |
| High-Frequency SMPS Output Stage | Automotive Body Control Module Power Supply |
Use Scenario: Output rectifier in 300 kHz forward converter supplying 12 V/0.8 A to sensor interface circuitry. IC Role / Device Role / Timing Role: Conducts during transformer reset phase; blocks reverse voltage during primary conduction. Use Value: 10 pF CJ reduces high-frequency ringing on output rail; 150°C TJ max enables operation near engine-control MCU. | Use Scenario: Input rectifier in 12 V battery-fed buck converter for LED lighting control in headlamp ECU. IC Role / Device Role / Timing Role: Converts alternator ripple to stable DC input for downstream PMIC; must survive load dump pulses. Use Value: AEC-Q101-qualified SFT17GH variant ensures reliability under 125°C ambient and 100 V load dump stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06U (STMicroelectronics) | Same 1 A / 600 V rating; VF = 1.7 V; trr = 30 ns; DO-214AC package | DO-214AC footprint differs - requires PCB layout change vs. TS-1 | Preferred where tighter trr tolerance (<30 ns) is required and board redesign is feasible |
| ES1D (ON Semiconductor) | 1 A / 200 V; VF = 0.95 V; trr = 35 ns; SMA package | Lower VRRM limits use to ≤140 V DC bus; smaller package reduces thermal mass | Select only for sub-200 V applications where lower VF outweighs voltage derating need |
Compared with STTH1R06U and ES1D, the SFT17G provides optimal balance of 500 V rating, TS-1 manufacturability, and AEC-Q101 readiness - making it preferred for industrial 400 V systems and automotive body electronics where voltage margin and assembly compatibility are prioritized.
Availability
SFT17G is available at Aetrix Electronics and suitable for DC/DC converters, switching inverters, and freewheeling applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for SFT17G 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 industrial, computing, and automotive markets since 1979.
The SFT11G–SFT18G series was designed specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding environments - emphasizing fast recovery, low VF consistency, and robust surge handling.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SFT17G?
The SFT17G has a VRRM of 500 V, verified per Taiwan Semiconductor's J2104 datasheet. This rating ensures reliable blocking capability in 350 V DC bus applications with standard 1.4× design margin. The value is measured under specified test conditions and applies across the full operating temperature range.
Does SFT17G have AEC-Q101 qualification?
The base SFT17G is not AEC-Q101 qualified; however, the variant SFT17GH is fully AEC-Q101 qualified per J2104 documentation. SFT17GH undergoes additional stress testing for automotive under-hood use, including temperature cycling, humidity bias, and mechanical shock validation.
What is the forward voltage (VF) of SFT17G at 1 A and 25°C?
The SFT17G exhibits a typical forward voltage of 1.70 V at IF = 1 A and TJ = 25°C, as specified in the Electrical Specifications table of the J2104 datasheet. This value is measured using a 0.3 ms pulse test and represents conduction loss under nominal operating conditions.
What package type does SFT17G use, and what are its key mechanical features?
SFT17G uses the TS-1 package: a molded epoxy case rated UL 94V-0, with pure tin-plated leads compliant with J-STD-002 solderability, cathode polarity marked by band, and approximate weight of 0.200 g. It meets JESD201 Class 2 whisker resistance requirements.
How does the reverse recovery time (trr) of SFT17G compare to slower rectifiers in high-frequency designs?
SFT17G has a trr of 35 ns, enabling clean commutation in converters operating above 100 kHz. Compared to standard fast rectifiers (≥100 ns), this reduces switching loss by up to 40% and minimizes voltage overshoot during turn-off - critical for maintaining EMI compliance in compact power supplies.
SFT17G A1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 500 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 500 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFT17G A1G FAQ
1.How can I place an order for SFT17G A1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFT17G A1G 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 SFT17G A1G reliable?
The price and inventory of SFT17G A1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT17G A1G is usually 5 days.
3.What payment methods are accepted for SFT17G A1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT17G A1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFT17G A1G?
SFT17G A1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFT17G A1G 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 SFT17G A1G?
For technical support, including SFT17G A1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT17G A1G requirements.
6.How does Aetrix verify that SFT17G A1G is sourced from the original manufacturer or authorized distributors?
All SFT17G A1G 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 SFT17G A1G meets industry standards.
7.What is the process for return or replacement of SFT17G A1G?
All SFT17G A1G units undergo pre-shipment inspection (PSI). If there is an issue with SFT17G A1G, 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 SFT17G A1G part is unused and in its original packaging.
Return procedure for SFT17G A1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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