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Taiwan Semiconductor Corporation SF24G
- Part No.:
- SF24G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF24G.pdf
- Description:
- DIODE GEN PURP 200V 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
SF24G from Taiwan Semiconductor is a 2 A, 200 V super fast rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 40 pF junction capacitance at 1 MHz and 4.0 V reverse bias, and 0.95 V forward voltage at 2 A and 25°C - used in high-frequency DC-DC converters and switching inverters.
For engineers reviewing the SF24G datasheet, SF24G pinout, SF24G application, or SF24G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), junction capacitance (40 pF @ 1 MHz, VR = 4.0 V), trr (≤35 ns), VF (≤0.95 V), and thermal resistance (RθJA = 65°C/W).
Technical Context
The SF24G employs a glass-passivated silicon junction optimized for high-speed switching, with a single-die configuration enabling low forward conduction loss and rapid carrier recombination. Its 35 ns trr and 40 pF CJ support operation in 100–500 kHz SMPS topologies where diode recovery behavior directly impacts efficiency and EMI.
Rated for TJ = –55°C to +150°C and qualified per JESD201 Class 2 whisker testing, the device sustains 50 A non-repetitive surge current (8.3 ms half-sine) and exhibits stable IR ≤5 µA at 25°C and ≤100 µA at 125°C under rated VR.
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 | 2 A - average forward current rating; sets continuous power handling limit at TA ≤ 75°C with derating |
| trr | ≤35 ns - reverse recovery time; enables efficient operation up to ~500 kHz without excessive switching loss |
| CJ | 40 pF @ 1 MHz, VR = 4.0 V - junction capacitance; impacts high-frequency turn-off loss and EMI generation |
| VF | ≤0.95 V @ IF = 2 A, TJ = 25°C - forward voltage drop; determines conduction loss and thermal load at full load |
| RθJA | 65°C/W - junction-to-ambient thermal resistance; defines required heatsinking for 2 A continuous operation |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, glass-passivated, cathode indicated by band. Weight ≈ 0.400 g. RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must withstand surge currents up to 50 A |
| Cathode | Forward current exit / reverse blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive); marked by visible band; blocks 200 V continuously |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery | trr ≤ 35 ns ensures minimal switching loss and reduced EMI in 100–500 kHz SMPS designs |
| Glass passivated junction | Enhances humidity resistance and long-term reliability in automotive and industrial environments |
| Low VF (0.95 V) | Reduces conduction loss by ~15% vs. standard FR107 at 2 A, lowering thermal stress on PCB layout |
| High IFSM (50 A) | Withstands transient inrush and short-circuit events without failure in unregulated DC inputs |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 200 kHz flyback converter delivering 12 V/1.5 A. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during transformer reset phase; synchronized with primary MOSFET gate timing. Use Value: 35 ns trr minimizes reverse recovery charge (Qrr), reducing voltage spikes and improving efficiency by ~2.1% over standard fast rectifiers. | Use Scenario: Output stage freewheeling path in 3-phase IGBT-based motor drive operating at 8 kHz PWM. IC Role / Device Role / Timing Role: Unidirectional current path during IGBT off-time; clamps inductive kickback energy. Use Value: 200 V VRRM and 50 A IFSM provide margin against bus transients; 40 pF CJ limits capacitive coupling into gate drive circuits. |
| Freewheeling Diode | Switch-Mode Power Supply |
Use Scenario: Inductor current recirculation path in synchronous buck regulator with 500 kHz switching frequency. IC Role / Device Role / Timing Role: Conducts during high-side MOSFET off-time; blocks reverse voltage during on-time. Use Value: Low 0.95 V VF reduces average conduction loss; 65°C/W RθJA allows direct PCB copper pour cooling without heatsink. | Use Scenario: Input rectification and PFC front-end in compact AC-DC adapter (90–264 VAC input). IC Role / Device Role / Timing Role: High-voltage bridge leg component; handles 200 V reverse stress and 2 A RMS current. Use Value: AEC-Q101 qualification option available; 150°C TJ max supports sealed enclosure operation up to 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R02 | VRRM = 200 V, trr = 30 ns, VF = 0.92 V @ 2 A, DO-204AC package | Marginally faster trr but identical voltage/current ratings; slightly lower VF improves light-load efficiency | Preferred where <30 ns trr is critical; same footprint and thermal profile |
| ES2D | VRRM = 200 V, trr = 35 ns, VF = 0.98 V @ 2 A, DO-204AC package | Near-identical timing and thermal specs; 0.03 V higher VF increases conduction loss by ~3% at full load | Valid alternative when STTH2R02 is unavailable; verify IR spec (5 µA max) matches design leakage budget |
Compared with STTH2R02 and ES2D, the SF24G offers balanced performance: identical VRRM and trr to ES2D, lower VF than ES2D, and tighter VF tolerance than STTH2R02 - making it optimal for cost-sensitive, thermally constrained 200 V SMPS designs requiring AEC-Q101 option.
Availability
SF24G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, freewheeling circuits, and AC-DC power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SF24G 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 rectifiers, TVS, MOSFETs, and bipolar transistors since 1979.
The SF24G belongs to TSC's SF2xG super fast rectifier family, engineered for high-efficiency, high-frequency power conversion in automotive, industrial, and consumer power supplies where low trr and stable VF are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the SF24G?
The SF24G has a VRRM of 200 V, meaning it can reliably block up to 200 V of reverse voltage in repetitive operation. This rating is confirmed in the Absolute Maximum Ratings table and defines its suitability for 200 V-class power stages - such as secondary-side rectification in 12 V/24 V output flyback converters or input bridges in universal-input AC-DC adapters. Exceeding this voltage risks avalanche breakdown.
What is the junction capacitance (CJ) of the SF24G and under what test conditions is it specified?
The SF24G junction capacitance is 40 pF, measured at 1 MHz with 4.0 V reverse bias (VR) and TA = 25°C. This value appears in the Electrical Specifications table and directly influences high-frequency switching loss and EMI behavior. It is specific to the SF21G–SF24G subgroup; higher-voltage variants (SF25G–SF28G) specify 20 pF due to thicker depletion layers.
Is the SF24G suitable for automotive applications?
Yes - an AEC-Q101 qualified version of the SF24G is available (ordering code SF24GH). The base SF24G meets JESD201 Class 2 whisker testing and operates from –55°C to +150°C, supporting under-hood and infotainment power supply use. For automotive-grade compliance, specify the "H" suffix variant, which undergoes additional stress testing per AEC-Q101 requirements.
What is the forward voltage (VF) of the SF24G at rated current and temperature?
The SF24G has a maximum forward voltage of 0.95 V at IF = 2 A and TJ = 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating. At elevated junction temperatures (e.g., 125°C), VF decreases slightly (~0.85 V), while conduction loss remains well-controlled due to the device's low RDS(on)-like behavior in forward conduction.
Does the SF24G have a defined reverse recovery time (trr), and how is it tested?
Yes - the SF24G has a maximum reverse recovery time (trr) of 35 ns, tested under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC standards. This parameter is critical for high-frequency switching efficiency and is validated using the test circuit shown in Figure 6 of the datasheet. The 35 ns trr places SF24G in the "super fast" category, distinguishing it from standard rectifiers (typically >500 ns) and fast rectifiers (100–300 ns).
SF24G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 40pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF24G FAQ
1.How can I place an order for SF24G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF24G 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 SF24G reliable?
The price and inventory of SF24G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF24G is usually 5 days.
3.What payment methods are accepted for SF24G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF24G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF24G?
SF24G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF24G 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 SF24G?
For technical support, including SF24G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF24G requirements.
6.How does Aetrix verify that SF24G is sourced from the original manufacturer or authorized distributors?
All SF24G 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 SF24G meets industry standards.
7.What is the process for return or replacement of SF24G?
All SF24G units undergo pre-shipment inspection (PSI). If there is an issue with SF24G, 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 SF24G part is unused and in its original packaging.
Return procedure for SF24G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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