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Taiwan Semiconductor Corporation SF34G A0G
- Part No.:
- SF34G A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF34G A0G.pdf
- Description:
- DIODE GEN PURP 200V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:10
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Product details
Overview
SF34G A0G from Taiwan Semiconductor is a 3A, 200V super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 0.95V forward voltage at 3A/25°C, and 125A surge capability - deployed in DC-DC converter freewheeling paths for high-efficiency power conversion.
For engineers reviewing the SF34G A0G datasheet, SF34G A0G pinout, SF34G A0G application, or SF34G A0G equivalent, key selection criteria include VRRM=200V, trr=35ns, VF=0.95V @3A, RθJL=10°C/W, and DO-201AD mechanical compatibility with automated through-hole assembly.
Technical Context
This single-die silicon rectifier uses epitaxial planar construction to achieve fast switching with low stored charge. Its 35ns reverse recovery time (IF=0.5A, IR=1.0A, Irr=0.25A) enables operation in high-frequency SMPS topologies up to several hundred kHz.
Thermal performance is defined by RθJL=10°C/W and RθJA=35°C/W, supporting continuous 3A conduction at ≤75°C ambient when mounted on standard copper land patterns. The cathode band polarity marking ensures unambiguous PCB orientation during manual or automated placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse voltage; sets upper limit for off-state blocking in flyback/freewheeling circuits |
| IF | 3 A - Continuous average forward current; defines steady-state thermal design basis at TA ≤ 75°C |
| IFSM | 125 A - Non-repetitive surge rating; supports inrush and transient overload without failure |
| trr | 35 ns - Reverse recovery time; determines switching loss and EMI profile in >100 kHz converters |
| VF | 0.95 V @ 3A, 25°C - Forward voltage drop; directly impacts conduction loss and thermal rise under load |
| RθJL | 10 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling using lead temperature as proxy |
| CJ | 80 pF @ 1MHz, VR=4V - Junction capacitance; affects high-frequency noise coupling and snubber design |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by a painted band; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to switch node or inductor output in freewheeling path; requires thermal relief pad for heat dissipation |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; polarity must match schematic symbol to prevent reverse breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr ≤ 35 ns) | Enables high-frequency switching (>200 kHz) with minimal turn-off loss and reduced EMI generation |
| Low VF = 0.95 V @ 3A | Reduces conduction loss by ~15% vs. standard fast rectifiers, improving efficiency in 12–48V output converters |
| DO-201AD mechanical standard | Ensures compatibility with legacy through-hole tooling, wave solder profiles, and IPC-A-610 Class 2/3 assembly |
| AEC-Q101 qualified option (SF34GH) | Validated for automotive under-hood applications including engine control and ADAS power supplies |
| RoHS + halogen-free | Meets IEC 61249-2-21 compliance for environmentally constrained industrial and consumer end equipment |
Applications
| DC-DC Converter Freewheeling | Switched-Mode Inverter Output |
|---|---|
Use Scenario: Freewheeling path in synchronous buck converter supplying FPGA core voltage (1.2V/15A). IC Role / Device Role / Timing Role: Unidirectional current path during low-side switch off-time; blocks reverse voltage while conducting inductive kickback. Use Value: 35ns trr minimizes tail current overlap loss; 0.95V VF reduces average conduction loss to <2.9W at 3A, easing thermal management. | Use Scenario: Output rectification in 48V-to-380V boost PFC stage of telecom rectifier. IC Role / Device Role / Timing Role: High-voltage output diode handling 200V reverse stress and 3A average current in discontinuous conduction mode. Use Value: 200V VRRM provides 2× safety margin over peak line voltage; 125A IFSM withstands startup surges without derating. |
| Industrial Motor Drive Snubber | LED Driver Flyback Secondary |
Use Scenario: Clamp diode in IGBT snubber network for 7.5kW AC drive inverter leg. IC Role / Device Role / Timing Role: Fast recovery path for inductive energy dissipation during IGBT turn-off transitions. Use Value: 35ns trr ensures clean voltage clamping before next switching cycle; DO-201AD leadframe handles 125A surge without bond wire failure. | Use Scenario: Secondary-side rectifier in isolated 24V/2A LED driver operating at 65kHz. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates in continuous conduction mode with tight ripple constraints. Use Value: 80pF junction capacitance limits high-frequency noise injection into output filter; 0.95V VF maintains >89% efficiency at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L02S (STMicroelectronics) | VRRM=200V, IF=3A, trr=30ns, VF=0.92V @3A, SOD-123FL package | Surface-mount only; requires reflow-compatible layout and lacks axial lead mechanical robustness | Preferred for space-constrained PCBs where automated SMT is available and thermal mass is limited |
| ES3D (ON Semiconductor) | VRRM=200V, IF=3A, trr=35ns, VF=0.97V @3A, DO-204AL (DO-41) package | Same speed and rating but larger DO-41 body; 1.5g weight vs. SF34G A0G's 1.1g | Used where legacy DO-41 footprint exists and higher surge margin (IFSM=150A) is prioritized over weight or size |
Compared with STTH3L02S and ES3D, SF34G A0G offers optimal balance of axial-mount reliability, 1.1g lightweight construction, and verified 35ns trr performance in through-hole power stages - especially where mechanical shock resistance and wave-solder compatibility are required.
Availability
SF34G A0G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric binning, and long-term industrial lifecycle support.
Supply support for SF34G A0G 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 devices, and MOSFETs since 1979.
The SF3xG series was developed specifically for high-frequency, high-reliability power conversion in industrial and automotive systems - emphasizing fast recovery, low VF, and robust thermal performance in standardized axial packages.
FAQ
What is the maximum junction temperature rating for SF34G A0G?
The SF34G A0G has a maximum junction temperature (TJ MAX) of +150°C, validated across its full operating range. This rating allows reliable operation in enclosed industrial enclosures with ambient temperatures up to +75°C when mounted on standard 1-inch² copper land pattern per JEDEC 51-3. Derating curves in the SF34G A0G datasheet confirm 3A continuous current is sustainable at TJ ≤ 150°C.
Does SF34G A0G meet automotive qualification standards?
The SF34G A0G itself is not AEC-Q101 qualified; however, the pin-compatible SF34GH variant (same DO-201AD package, identical electrical specs) is fully AEC-Q101 certified. For automotive applications requiring qualification, SF34GH must be specified - SF34G A0G is intended for industrial and commercial power supplies where AEC-Q101 is not mandated.
What is the reverse leakage current specification for SF34G A0G at elevated temperature?
At TJ = 125°C and rated VRRM = 200V, the SF34G A0G exhibits a maximum reverse leakage current (IR) of 100 µA, measured under pulse conditions (PW = 30ms). At 25°C, IR is ≤5 µA. This low leakage supports stable operation in high-impedance feedback networks and minimizes standby power loss in always-on systems.
How does the junction capacitance of SF34G A0G affect EMI in high-frequency designs?
SF34G A0G has a typical junction capacitance (CJ) of 80 pF at 1MHz and VR = 4V. In 200–500 kHz SMPS designs, this value contributes to high-frequency common-mode noise coupling across the transformer barrier. Layout best practices - such as minimizing loop area and adding RC snubbers - are recommended to suppress ringing caused by CJ interacting with circuit stray inductance.
Is SF34G A0G compatible with lead-free wave soldering processes?
Yes, SF34G A0G features pure tin-plated leads compliant with J-STD-002 and rated for lead-free wave soldering (peak temperature ≤ 260°C, 10s max). Its DO-201AD molding compound meets UL 94V-0 flammability rating, and the device passes JESD201 Class 2 whisker testing - ensuring long-term solder joint integrity in RoHS-compliant manufacturing lines.
SF34G A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF34G A0G FAQ
1.How can I place an order for SF34G A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF34G A0G 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 SF34G A0G reliable?
The price and inventory of SF34G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF34G A0G is usually 5 days.
3.What payment methods are accepted for SF34G A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF34G A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF34G A0G?
SF34G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF34G A0G 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 SF34G A0G?
For technical support, including SF34G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF34G A0G requirements.
6.How does Aetrix verify that SF34G A0G is sourced from the original manufacturer or authorized distributors?
All SF34G A0G 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 SF34G A0G meets industry standards.
7.What is the process for return or replacement of SF34G A0G?
All SF34G A0G units undergo pre-shipment inspection (PSI). If there is an issue with SF34G A0G, 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 SF34G A0G part is unused and in its original packaging.
Return procedure for SF34G A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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