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Taiwan Semiconductor Corporation SF14G
- Part No.:
- SF14G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SF14G.pdf
- Description:
- DIODE GEN PURP 200V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,040
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Product details
Overview
SF14G from Taiwan Semiconductor is a 1 A, 200 V super fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 1 A and 25°C, 30 A surge current rating, and 20 °C/W junction-to-lead thermal resistance. It is used in DC-DC converters and switching-mode power supplies where fast switching and low conduction loss are required.
For engineers reviewing the SF14G datasheet, SF14G pinout, SF14G application, or SF14G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward voltage drop (0.95 V @ 1 A), reverse recovery time (35 ns), thermal resistance (20 °C/W), and AEC-Q101 qualification availability in H-suffix variants.
Technical Context
The SF14G is a single-die, planar passivated silicon rectifier optimized for high-frequency switching applications. Its 35 ns trr and low VF enable reduced switching losses in SMPS topologies operating up to several hundred kHz.
Designed with pure tin-plated leads compliant with J-STD-002 and JESD201 Class 2 whisker resistance, it supports automated soldering and automotive-grade reliability when ordered with AEC-Q101 qualification (e.g., SF14GH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive reverse blocking voltage; defines usable input voltage range in flyback or boost converters |
| IF | 1 A - continuous average forward current; sets output power capability in 12–24 V DC-DC stages |
| IFSM | 30 A - non-repetitive surge rating; withstands inrush and fault currents without failure |
| trr | 35 ns - reverse recovery time; enables efficient operation at ≥200 kHz switching frequencies |
| VF @ 1A, 25°C | 0.95 V - forward voltage drop; determines conduction loss (0.95 W at 1 A) and thermal design margin |
| RθJL | 20 °C/W - junction-to-lead thermal resistance; allows direct heatsinking via PCB copper or lead frame |
| CJ @ 1 MHz, 4 V | 20 pF - junction capacitance; impacts EMI generation and snubber sizing in high-dV/dt circuits |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band polarity marking. Weight ≈ 0.350 g. UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential node (e.g., switch node in buck converter); accepts 1 A DC and 30 A surge |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connected to output rail or ground return; blocks up to 200 V reverse voltage |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery | 35 ns trr enables high-frequency SMPS operation with minimal switching loss |
| Low forward voltage | 0.95 V @ 1 A reduces conduction loss and improves efficiency in low-voltage outputs |
| AEC-Q101 qualified option | SF14GH variant meets automotive stress test requirements for under-hood use |
| Tin-plated leads | J-STD-002 compliant terminations ensure reliable reflow and wave solder joint integrity |
| Halogen-free construction | Meets IEC 61249-2-21; supports RoHS-compliant and environmentally regulated designs |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V to 5 V/3.3 V flyback converters powering microcontrollers and sensors. IC Role / Device Role / Timing Role: Output rectifier diode conducting during transformer demagnetization phase. Use Value: 0.95 V VF minimizes power loss at 1 A load; 35 ns trr prevents cross-conduction in synchronous designs. | Use Scenario: Freewheeling path in H-bridge motor inverters driving 24 V BLDC fans or pumps. IC Role / Device Role / Timing Role: Unidirectional current path during PWM off-time to sustain inductive current flow. Use Value: 30 A IFSM handles motor startup surges; 200 V VRRM covers bus voltage transients up to 160 V DC. |
| AC-DC Adapters | Industrial Power Supplies |
Use Scenario: Output rectification in compact 5–10 W offline adapters for IoT gateways and smart home hubs. IC Role / Device Role / Timing Role: Primary output rectifier in discontinuous conduction mode (DCM) flyback topology. Use Value: 20 pF CJ limits high-frequency noise coupling; DO-41 package fits tight board spacing constraints. | Use Scenario: Auxiliary bias supply rectification in 48 V telecom PSUs requiring long-term reliability. IC Role / Device Role / Timing Role: Low-power auxiliary rail rectifier delivering <100 mA to control ICs and gate drivers. Use Value: 150 °C TJ max and 20 °C/W RθJL support operation in sealed enclosures without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02U (STMicroelectronics) | Same 1 A / 200 V rating; trr = 30 ns (slightly faster); VF = 0.92 V; DO-41 package | Optimized for ultra-low-noise applications; tighter VF distribution across temperature | Preferred where sub-30 ns trr and tighter VF consistency improve EMI compliance |
| ES1D (ON Semiconductor) | 1 A / 200 V; trr = 35 ns; VF = 0.97 V; same DO-41 package; no AEC-Q101 option | General-purpose industrial use; lacks automotive qualification path | Cost-sensitive designs where AEC-Q101 is not required and VF tolerance >0.95 V acceptable |
Compared with STTH1R02U and ES1D, the SF14G offers identical trr and competitive VF while providing an AEC-Q101-qualified variant (SF14GH) - a differentiating factor for automotive subsystems requiring component-level reliability validation.
Availability
SF14G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SF14G 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 consumer markets since 1979.
The SF11G–SF18G series is part of TSC's Super Fast Rectifier product line, engineered specifically for high-efficiency, high-frequency AC-DC and DC-DC conversion in space-constrained and thermally demanding environments.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SF14G?
The SF14G has a VRRM rating of 200 V, meaning it can reliably block up to 200 V of reverse voltage in repetitive operation. This value is fixed per the SF14G designation in the SF11G–SF18G family and is confirmed in the Absolute Maximum Ratings table. Exceeding 200 V may cause avalanche breakdown or permanent damage. The SF14G datasheet specifies this parameter at TA = 25°C with derating above that temperature.
Does SF14G have AEC-Q101 qualification?
The base SF14G is not AEC-Q101 qualified, but the variant SF14GH is explicitly listed as AEC-Q101 qualified in the Ordering Information section. The "H" suffix denotes automotive-grade qualification per JESD201 Class 2 and full AEC-Q101 stress testing. Engineers requiring automotive compliance must specify SF14GH, not SF14G, to ensure qualification coverage.
What is the forward voltage drop of SF14G at 1 A and 25°C?
The SF14G exhibits a typical forward voltage (VF) of 0.95 V at IF = 1 A and TJ = 25°C, as specified in the Electrical Specifications table. This value is measured under pulse conditions (PW = 0.3 ms) and represents the conduction loss baseline. At higher junction temperatures (e.g., 125°C), VF decreases slightly, but system-level thermal design must maintain TJ ≤ 150°C per absolute maximum rating.
What package type does SF14G use, and what are its mechanical features?
SF14G uses the DO-204AL (DO-41) axial-leaded package with a molded epoxy case rated UL 94V-0. It features pure tin-plated leads compliant with J-STD-002 for solderability and JESD201 Class 2 for whisker resistance. Polarity is indicated by a cathode band, and the device weighs approximately 0.350 g. Dimensions conform to standard DO-41 outline drawings in the datasheet.
How does SF14G compare to SF13G and SF15G in terms of voltage rating and forward voltage?
SF14G is rated for 200 V VRRM and has VF = 0.95 V @ 1 A, positioning it between SF13G (150 V, same VF) and SF15G (300 V, VF = 1.30 V). The VF increase in SF15G reflects higher voltage silicon design trade-offs. Selecting SF14G over SF15G avoids unnecessary VF penalty when 200 V blocking suffices - improving efficiency in 24–48 V input systems without over-specifying voltage margin.
SF14G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 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 @ 200 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF14G FAQ
1.How can I place an order for SF14G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF14G 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 SF14G reliable?
The price and inventory of SF14G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF14G is usually 5 days.
3.What payment methods are accepted for SF14G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF14G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF14G?
SF14G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF14G 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 SF14G?
For technical support, including SF14G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF14G requirements.
6.How does Aetrix verify that SF14G is sourced from the original manufacturer or authorized distributors?
All SF14G 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 SF14G meets industry standards.
7.What is the process for return or replacement of SF14G?
All SF14G units undergo pre-shipment inspection (PSI). If there is an issue with SF14G, 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 SF14G part is unused and in its original packaging.
Return procedure for SF14G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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