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Taiwan Semiconductor Corporation SFT12G A1G
- Part No.:
- SFT12G A1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- T-18, Axial
- Datasheet:
-
SFT12G A1G.pdf
- Description:
- DIODE GEN PURP 100V 1A TS-1
- Quantity:
- Payment:
- Shipping:
Inventory:5,916
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Product details
Overview
SFT12G from Taiwan Semiconductor is a 1 A, 100 V super fast rectifier diode in TS-1 package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 1 A and 25°C, and 30 A surge current capability; used in DC-DC converters and switching-mode inverters requiring high efficiency and low conduction loss.
For engineers reviewing the SFT12G datasheet, SFT12G pinout, SFT12G application, or SFT12G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), junction-to-ambient thermal resistance (100 °C/W), AEC-Q101 qualification status, RoHS/halogen-free compliance, and TS-1 mechanical compatibility with automated assembly.
Technical Context
The SFT12G is a single-die, planar-junction super fast recovery rectifier optimized for high-frequency switching applications. Its 35 ns trr and low VF (0.95 V @ 1 A, 25°C) minimize switching losses and conduction losses simultaneously.
Designed for operation up to 150°C junction temperature, it supports continuous 1 A forward current with derating above 25°C ambient and withstands 30 A non-repetitive surge (8.3 ms half-sine). The TS-1 package provides UL 94V-0 mold compound and pure tin-plated leads compliant with J-STD-002 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse blocking voltage without breakdown |
| IF | 1 A - continuous average forward current rating at TA = 25°C |
| IFSM | 30 A - peak non-repetitive surge current handling capability (8.3 ms) |
| trr | 35 ns - reverse recovery time enabling efficient operation in >100 kHz SMPS |
| VF | 0.95 V @ 1 A, 25°C - low forward drop reducing conduction loss and heat generation |
| RθJA | 100 °C/W - thermal resistance defining junction temperature rise under natural convection |
| CJ | 20 pF @ 1 MHz, 4 V - low junction capacitance minimizing capacitive switching loss |
Pinout & Package
TS-1 package: surface-mount, single-ended cathode-band-marked leadframe device with pure tin-plated leads; polarity indicated by cathode band; weight ≈ 0.200 g; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to lower-potential side of load or switch node in freewheeling path |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connected to higher-potential rail; blocks 100 V reverse voltage |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery | 35 ns trr enables use in high-frequency DC-DC converters (>100 kHz) without excessive switching loss |
| Low forward voltage | 0.95 V @ 1 A reduces power dissipation by ~15% vs. standard fast rectifiers with VF > 1.1 V |
| AEC-Q101 qualified option | SFT12GH variant available for automotive-grade reliability in engine control and ADAS power supplies |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained industrial designs |
| High surge robustness | 30 A IFSM supports inrush and fault-current transients in offline SMPS and motor drive snubbers |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 12 V–48 V telecom and server PSUs. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side switch off-time to recover energy and maintain output regulation. Use Value: 0.95 V VF and 35 ns trr reduce total power loss by ≥0.3 W per diode versus standard fast rectifiers at 500 kHz. | Use Scenario: Output stage in 1 kW solar micro-inverters converting DC to 60 Hz AC. IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge leg, blocking reverse voltage during PWM dead-time. Use Value: 100 V VRRM and 30 A IFSM support 400 V DC bus with margin for line surges and ringing. |
| Freewheeling Diode | Industrial SMPS |
Use Scenario: Inductive load flyback protection in PLC output modules driving solenoids and relays. IC Role / Device Role / Timing Role: Clamp inductive kickback voltage across MOSFET/IGBT switches during turn-off. Use Value: 150°C TJ max and 100 °C/W RθJA allow reliable operation in sealed enclosures without forced air cooling. | Use Scenario: Auxiliary bias supply in factory automation variable-frequency drives. IC Role / Device Role / Timing Role: Input rectifier feeding 15 V linear regulator for gate driver ICs and MCU rails. Use Value: TS-1 footprint enables compact layout; halogen-free construction meets IPC-J-STD-609A requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | VRRM = 600 V, VF = 1.15 V @ 1 A, trr = 45 ns, DO-41 package | Higher voltage rating but slower recovery and larger footprint; not drop-in compatible | Select when >100 V blocking is required and board space allows axial/DO-41 mounting |
| ES1B | VRRM = 100 V, VF = 0.93 V @ 1 A, trr = 35 ns, SMA package | Same electrical specs but SMA-4L footprint differs; thermal resistance 70 °C/W vs. TS-1's 100 °C/W | Prefer for higher power density if PCB copper area supports lower RθJA; verify land pattern compatibility |
Compared with STTH1R06 and ES1B, the SFT12G offers optimal balance of 100 V rating, 35 ns trr, and TS-1 manufacturability-making it ideal for cost-sensitive, high-volume SMT power supplies where thermal margin and assembly yield are critical.
Availability
SFT12G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for SFT12G 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 SFT1xG series belongs to TSC's Super Fast Rectifier product line, engineered specifically for high-efficiency, high-frequency switching power supplies where low VF, fast trr, and robust surge capability are mandatory.
FAQ
What is the maximum junction temperature rating for SFT12G?
The SFT12G has a maximum junction temperature (TJ MAX) of +150°C, allowing operation in high-ambient environments such as enclosed industrial power supplies or automotive under-hood auxiliary systems. Derating begins above 25°C ambient per the forward current derating curve in the datasheet. Thermal design must account for its 100 °C/W junction-to-ambient resistance to ensure the SFT12G stays within this limit under full load.
Is SFT12G AEC-Q101 qualified?
The base SFT12G is not AEC-Q101 qualified; however, the SFT12GH variant-identical electrically and mechanically but subjected to automotive-grade stress testing-is qualified per AEC-Q101. For automotive applications like body control modules or infotainment power supplies, specify SFT12GH to meet reliability requirements. The SFT12G remains suitable for industrial and commercial designs where AEC-Q101 is not mandated.
What does the 'G' suffix mean in SFT12G?
The 'G' suffix in SFT12G indicates RoHS-compliant, halogen-free construction per IEC 61249-2-21 and EU directives. It denotes green molding compound and pure tin-plated leads meeting J-STD-002 solderability standards. This distinguishes it from legacy non-RoHS versions and confirms suitability for environmentally regulated end equipment. The SFT12G is not the AEC-Q101 version-that requires the 'H' suffix (SFT12GH).
How does SFT12G compare to SFT11G and SFT13G in forward voltage?
The SFT12G shares the same 0.95 V typical forward voltage (VF) at 1 A and 25°C as SFT11G and SFT13G-these three variants (50 V, 100 V, 150 V VRRM) are grouped under identical VF and trr specifications. Only SFT14G and above show increased VF (1.30 V and 1.70 V), reflecting trade-offs between voltage rating and conduction loss. So for 100 V applications, the SFT12G delivers best-in-class VF among its voltage class.
What is the reverse leakage current of SFT12G at elevated temperature?
At 25°C, the SFT12G exhibits ≤5 µA reverse leakage current (IR) at rated VR; at 125°C, IR increases to ≤100 µA. This temperature-dependent behavior is typical for silicon PN-junction rectifiers and must be considered in high-temperature bias networks or precision sensing paths. The SFT12G's low IR at room temperature supports efficient standby modes in energy-sensitive applications.
SFT12G 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):
- 100 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TS-1
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFT12G A1G FAQ
1.How can I place an order for SFT12G A1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFT12G 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 SFT12G A1G reliable?
The price and inventory of SFT12G A1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT12G A1G is usually 5 days.
3.What payment methods are accepted for SFT12G A1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT12G A1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFT12G A1G?
SFT12G A1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFT12G 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 SFT12G A1G?
For technical support, including SFT12G A1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT12G A1G requirements.
6.How does Aetrix verify that SFT12G A1G is sourced from the original manufacturer or authorized distributors?
All SFT12G 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 SFT12G A1G meets industry standards.
7.What is the process for return or replacement of SFT12G A1G?
All SFT12G A1G units undergo pre-shipment inspection (PSI). If there is an issue with SFT12G 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 SFT12G A1G part is unused and in its original packaging.
Return procedure for SFT12G A1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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