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Taiwan Semiconductor Corporation SFT18G A1G
- Part No.:
- SFT18G A1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SFT18G A1G.pdf
- Description:
- DIODE GEN PURP 600V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:7,099
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Product details
Overview
SFT18G from Taiwan Semiconductor is a 1 A, 600 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 - optimized for high-efficiency DC-DC converters and freewheeling paths in automotive-grade switching inverters.
For engineers reviewing the SFT18G datasheet, SFT18G pinout, SFT18G application, or SFT18G equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, AEC-Q101 qualification (when ordered as SFT18GH), 30 A surge rating, thermal resistance of 100°C/W, and TS-1 package compatibility with high-density power layouts.
Technical Context
The SFT18G is a single-die, planar epitaxial super fast recovery rectifier designed for high-frequency switching applications. Its 35 ns trr and low 10 pF CJ enable minimal switching loss in 100–500 kHz SMPS topologies, while the 600 V VRRM supports primary-side rectification in offline AC-DC and industrial DC-DC stages.
Thermally, it operates from –55°C to +150°C junction temperature with 100°C/W RθJA, requiring minimal heatsinking in ≤1 A continuous conduction mode. The pure tin-plated TS-1 leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - supports primary-side rectification in universal-input AC-DC supplies up to 400 VDC bus |
| IF | 1 A continuous - rated for sustained conduction in low-power auxiliary rails and gate-drive bias supplies |
| IFSM | 30 A (8.3 ms) - withstands inrush and transient overloads in motor drive freewheeling paths |
| VF @ 1 A, 25°C | 1.70 V - contributes ~1.7 W conduction loss at full load, enabling >92% efficiency in 12 V output converters |
| trr | 35 ns - reduces switching loss and EMI in 200–500 kHz flyback and forward converters |
| CJ @ 4 V | 10 pF - minimizes capacitive coupling noise in high dv/dt gate-drive isolation circuits |
| TJ max | +150°C - enables operation in under-hood automotive environments without derating below 1 A |
Pinout & Package
TS-1 package: molded epoxy case with gull-wing leads, cathode band marking, 0.200 g mass, UL 94V-0 rated compound, and pure tin plating per J-STD-002.
| 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; marked by band | Connected to higher-potential rail (e.g., output capacitor positive or DC bus); polarity critical for reverse blocking |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option (SFT18GH) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, and UHAST |
| Super fast recovery (trr = 35 ns) | Reduces turn-off tail current and associated switching losses in high-frequency SMPS designs |
| Low VF (1.70 V @ 1 A) | Lowers conduction loss versus standard FRDs, improving thermal margin in sealed enclosures |
| TS-1 package with J-STD-002 solderability | Enables reliable reflow assembly in high-volume automotive PCB manufacturing |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated end equipment |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: 12 V to 48 V bidirectional DC-DC converter in 48 V mild hybrid vehicles. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck-boost stage handling regenerative braking energy. Use Value: 35 ns trr minimizes reverse recovery charge (Qrr), reducing MOSFET voltage overshoot and snubber losses during hard commutation. | Use Scenario: Auxiliary power supply in variable-frequency drives for HVAC compressors. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback converter powering gate drivers and MCU rails. Use Value: 600 V VRRM ensures safe operation across reflected transients up to 450 V, eliminating need for voltage clamping. |
| LED Driver Secondary Rectification | UPS Battery Charger Front-End |
Use Scenario: Constant-current LED driver for commercial street lighting with 300 VAC input. IC Role / Device Role / Timing Role: Secondary-side rectifier in quasi-resonant flyback delivering 36 V/0.7 A to LED string. Use Value: 1.70 V VF maintains <1.3 W dissipation at full load, enabling compact heatsinkless design in IP66 enclosures. | Use Scenario: On-line UPS battery charger operating from 230 VAC with PFC front-end and LLC resonant stage. IC Role / Device Role / Timing Role: Primary-side clamp diode in active clamp forward topology. Use Value: 30 A IFSM withstands repeated 20 A surge events during battery equalization cycles without degradation. |
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-1EWH06-M3 | 600 V, 1 A, VF = 1.75 V @ 1 A, trr = 30 ns, DO-214AC package | Smaller footprint but higher RθJA (125°C/W); requires tighter layout thermal relief | Preferred where board space is constrained and 5 ns faster trr justifies 0.05 V VF penalty |
| ON Semiconductor MUR160RLG | 600 V, 1 A, VF = 1.7 V @ 1 A, trr = 50 ns, DO-41 package | Slower recovery increases switching loss above 150 kHz; axial leads limit automated assembly | Acceptable for cost-sensitive industrial supplies operating ≤100 kHz with through-hole assembly |
Compared with VS-1EWH06-M3 and MUR160RLG, the SFT18G offers balanced performance: identical VRRM and IF rating, lowest VF among TS-1 packaged alternatives, and trr optimized for 200–400 kHz operation - making it ideal for automotive and high-density industrial SMPS where thermal and EMI constraints are tight.
Availability
SFT18G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switch-mode inverters, and LED driver secondary rectification requiring stable component supply and long-term lifecycle support.
Supply support for SFT18G 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 SFT11G–SFT18G series was developed to deliver AEC-Q101-qualified super fast rectifiers with optimized VF/trr trade-offs for next-generation 48 V automotive systems and high-frequency industrial SMPS.
FAQ
What is the maximum junction temperature rating for SFT18G?
The SFT18G has a maximum junction temperature (TJ max) of +150°C, allowing uninterrupted operation in under-hood automotive environments and sealed industrial enclosures without current derating below 1 A at ambient temperatures up to +85°C. This rating is validated per JEDEC JESD22-A108 and applies to both standard and AEC-Q101-qualified SFT18GH variants.
Is SFT18G pin-compatible with other devices in the SFT11G–SFT18G family?
Yes, all SFT11G through SFT18G devices share identical TS-1 package dimensions, pinout, and thermal pad layout - enabling drop-in voltage rating upgrades on existing PCBs. The anode and cathode terminals remain fixed across the family, and marking differs only in laser-etched code (e.g., "SFT18G" vs "SFT15G"). No layout changes are required when substituting within this series.
Does SFT18G meet automotive reliability standards?
The base SFT18G is not AEC-Q101 qualified; however, the variant SFT18GH is fully AEC-Q101 certified for stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). Only SFT18GH carries the "H" suffix and is approved for automotive powertrain and chassis applications.
What is the reverse recovery time (trr) specification for SFT18G and how is it measured?
The SFT18G has a maximum reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC JESD282B. This value reflects the time required for minority carriers to clear after forward conduction, directly impacting switching loss and EMI in high-frequency converters - a key differentiator versus standard fast recovery diodes.
How does the forward voltage (VF) of SFT18G compare to lower-voltage variants in the same family?
The SFT18G exhibits a typical VF of 1.70 V at 1 A and 25°C - higher than SFT14G (0.95 V) and SFT16G (1.30 V) due to its wider bandgap silicon design needed to sustain 600 V blocking. This trade-off ensures robustness at high voltage while maintaining competitive conduction loss for its class; VF increases incrementally across the SFT11G–SFT18G series as VRRM rises.
SFT18G 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):
- 600 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 @ 600 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
SFT18G A1G FAQ
1.How can I place an order for SFT18G A1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFT18G 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 SFT18G A1G reliable?
The price and inventory of SFT18G A1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT18G A1G is usually 5 days.
3.What payment methods are accepted for SFT18G A1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT18G A1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFT18G A1G?
SFT18G A1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFT18G 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 SFT18G A1G?
For technical support, including SFT18G A1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT18G A1G requirements.
6.How does Aetrix verify that SFT18G A1G is sourced from the original manufacturer or authorized distributors?
All SFT18G 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 SFT18G A1G meets industry standards.
7.What is the process for return or replacement of SFT18G A1G?
All SFT18G A1G units undergo pre-shipment inspection (PSI). If there is an issue with SFT18G 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 SFT18G A1G part is unused and in its original packaging.
Return procedure for SFT18G A1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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