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Taiwan Semiconductor Corporation SFT17G R0G
- Part No.:
- SFT17G R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SFT17G R0G.pdf
- Description:
- DIODE GEN PURP 500V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:8,134
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Product details
Overview
SFT17G from Taiwan Semiconductor is a 1 A, 500 V super fast recovery rectifier diode in TS-1 package, featuring 1.70 V forward voltage at 1 A and 35 ns reverse recovery time, designed for high-efficiency DC-DC converters and switching inverters requiring low conduction loss and fast switching.
For engineers reviewing the SFT17G datasheet, SFT17G pinout, SFT17G application, or SFT17G equivalent, key selection criteria include repetitive peak reverse voltage (500 V), surge current rating (30 A), junction temperature range (–55°C to +150°C), thermal resistance (100°C/W), and AEC-Q101 qualification availability via SFT17GH variant.
Technical Context
The SFT17G employs a single-die silicon planar junction structure optimized for super-fast recovery with controlled minority carrier lifetime. Its 35 ns trr and 10 pF junction capacitance at 4.0 V enable efficient operation in 100 kHz–500 kHz switching topologies.
Rated for 1 A average forward current and 30 A non-repetitive surge (8.3 ms half-sine), it maintains stable reverse leakage (<5 µA at 25°C, <100 µA at 125°C) across its –55°C to +150°C operating junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - supports DC bus voltages up to 350 VDC in boost/buck converters with 1.4× safety margin |
| IF(AV) | 1 A - continuous output current capability for compact 10–25 W power stages |
| VF @ 1 A, 25°C | 1.70 V - conduction loss of 1.7 W at full load, enabling thermally constrained designs |
| trr | 35 ns - minimizes switching losses and EMI in hard-switched SMPS above 100 kHz |
| RθJA | 100 °C/W - requires ≤ 75°C ambient or minimal copper area for safe 1 A operation without heatsink |
| IFSM | 30 A - withstands inrush and transient overloads typical in automotive cold-crank and industrial startup |
| CJ @ 4 V | 10 pF - reduces capacitive coupling noise in high dv/dt gate-drive or snubber circuits |
Pinout & Package
TS-1 package: molded epoxy case with pure tin-plated leads, cathode indicated by band, UL 94V-0 rated, 0.200 g mass, JESD201 Class 2 whisker compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck sync rectifier or transformer secondary center-tap) |
| Cathode | Current exit point during forward conduction; polarity marked by band | Connected to output rail or higher-potential node; defines unidirectional current path and blocking direction |
Key Features
| Feature | Design Value |
|---|---|
| Super-fast recovery (trr = 35 ns) | Reduces turn-off switching loss and associated EMI in high-frequency SMPS without requiring snubbers |
| Low VF (1.70 V @ 1 A) | Improves efficiency in 12–48 V output converters where conduction loss dominates at light-to-moderate loads |
| High surge rating (30 A IFSM) | Supports reliable operation during input transients, motor startup surges, and hot-plug events |
| AEC-Q101 qualified option (SFT17GH) | Enables direct use in automotive power modules, body control units, and ADAS power supplies without requalification |
Applications
| Automotive DC-DC Converter | Industrial Switch-Mode Inverter |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down converter in vehicle infotainment head unit with cold-crank tolerance. IC Role / Device Role / Timing Role: Output rectifier in synchronous buck topology, handling 1 A continuous load with 500 V reverse standoff. Use Value: 35 ns trr prevents shoot-through during high-side FET turn-on; 1.70 V VF limits thermal rise in sealed enclosure. | Use Scenario: Auxiliary power supply in PLC I/O module converting 24 VAC to regulated 5 VDC. IC Role / Device Role / Timing Role: Freewheeling diode across relay coil and flyback converter output rectifier. Use Value: 30 A IFSM absorbs inductive kickback; 100°C/W RθJA allows PCB-only thermal management. |
| Telecom Power Brick | LED Driver Secondary Rectification |
Use Scenario: Isolated 48 V input, 12 V/2 A output DC-DC brick for base station radio units. IC Role / Device Role / Timing Role: Secondary-side rectifier in active-clamp forward or LLC resonant converter. Use Value: 500 V VRRM accommodates reflected transients; 10 pF CJ minimizes capacitive coupling into sensitive RF sections. | Use Scenario: Constant-current LED driver for street lighting with 36 V string output. IC Role / Device Role / Timing Role: Output rectifier in flyback-derived constant-current topology. Use Value: Low VF ensures >92% efficiency at full load; RoHS/halogen-free compliance meets outdoor lighting environmental specs. |
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 IF = 1 A, VRRM = 600 V, trr = 35 ns, but VF = 1.75 V @ 1 A; TO-220AC package (larger footprint, better thermal) | Preferred where board space allows and higher thermal margin is needed; not TS-1 drop-in | Select when thermal design requires lower junction temperature or legacy TO-220 layout exists |
| ES1D (ON Semiconductor) | VRRM = 200 V, IF = 1 A, trr = 35 ns, VF = 1.7 V @ 1 A; SMA package; no AEC-Q101 option | Limited to ≤140 VDC systems; unsuitable for 400–500 V bus applications | Choose only for cost-sensitive 24–48 V systems where 500 V standoff is unnecessary |
Compared with STTH1R06U and ES1D, the SFT17G uniquely balances 500 V rating, TS-1 compactness, and AEC-Q101 availability-making it optimal for space-constrained automotive and industrial 12–48 V output converters needing robust 500 V reverse blocking.
Availability
SFT17G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching inverters, and telecom power bricks requiring stable component supply with consistent parametric performance across production lots.
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, specializing in power rectifiers, TVS diodes, MOSFETs, and bipolar transistors.
The SFT17G belongs to TSC's SFT1xG super fast rectifier family, engineered specifically for high-frequency switching power supplies demanding low VF, tight trr distribution, and AEC-Q101 reliability in compact surface-mount packages.
FAQ
What is the maximum junction temperature rating for SFT17G?
The SFT17G has a maximum junction temperature (TJ MAX) of +150°C, with an operating range from –55°C to +150°C. This rating enables reliable operation in under-hood automotive environments and enclosed industrial enclosures. Derating curves confirm 1 A average forward current is sustainable up to +75°C ambient when mounted on standard FR-4 PCB with minimal copper; the SFT17G datasheet provides exact derating factors per ambient temperature.
Is SFT17G pin-compatible with other devices in the SFT1xG series?
Yes, all SFT1xG devices-including SFT17G-share identical TS-1 package dimensions, pinout, and thermal pad layout. The only differences are VRRM (500 V for SFT17G), VF (1.70 V), and marking code. This allows direct substitution within the same voltage class during design iteration or BOM optimization without PCB changes.
Does SFT17G meet automotive qualification standards?
The base SFT17G is not AEC-Q101 qualified, but its variant SFT17GH is fully AEC-Q101 qualified and shares identical electrical specifications and TS-1 packaging. SFT17GH is intended for automotive power conversion modules, body electronics, and ADAS subsystems where stress testing per AEC-Q101 is mandatory.
What is the reverse recovery time (trr) test condition for SFT17G?
The SFT17G reverse recovery time is specified as 35 ns maximum under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per JEDEC-standard test circuit. This value is measured at TA = 25°C and reflects performance in hard-switched topologies; actual trr increases slightly at elevated junction temperatures but remains ≤45 ns up to TJ = 125°C.
How does the junction capacitance of SFT17G affect high-frequency design?
The SFT17G exhibits 10 pF typical junction capacitance at VR = 4.0 V and 1 MHz, significantly lower than earlier-generation fast rectifiers. This low CJ reduces displacement current during high dv/dt transitions, minimizing EMI generation and gate-drive coupling in adjacent MOSFETs-critical in compact 300–500 kHz flyback or active-clamp forward converters where layout parasitics dominate noise behavior.
SFT17G R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- 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 R0G FAQ
1.How can I place an order for SFT17G R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFT17G R0G 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 R0G reliable?
The price and inventory of SFT17G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT17G R0G is usually 5 days.
3.What payment methods are accepted for SFT17G R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT17G R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFT17G R0G?
SFT17G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFT17G R0G 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 R0G?
For technical support, including SFT17G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT17G R0G requirements.
6.How does Aetrix verify that SFT17G R0G is sourced from the original manufacturer or authorized distributors?
All SFT17G R0G 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 R0G meets industry standards.
7.What is the process for return or replacement of SFT17G R0G?
All SFT17G R0G units undergo pre-shipment inspection (PSI). If there is an issue with SFT17G R0G, 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 R0G part is unused and in its original packaging.
Return procedure for SFT17G R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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