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Taiwan Semiconductor Corporation SFAF505G C0G
- Part No.:
- SFAF505G C0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF505G C0G.pdf
- Description:
- DIODE GEN PURP 300V 5A ITO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,079
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Product details
Overview
SFAF505G from Taiwan Semiconductor is a 5A, 500V super fast rectifier diode in ITO-220AC package, featuring 35ns reverse recovery time, 1.300V max forward voltage at 5A/25°C, 125A surge capability, and AEC-Q101 qualification option (SFAF505GH). It serves as a freewheeling or output rectifier in high-frequency switching power supplies.
For engineers reviewing the SFAF505G datasheet, SFAF505G pinout, SFAF505G application, or SFAF505G equivalent, key selection criteria include VRRM = 500V, IF = 5A, trr = 35ns, RθJC = 5°C/W, and UL recognition (E-326243), critical for DC-DC converters and automotive-grade SMPS designs.
Technical Context
The SFAF505G employs a glass-passivated silicon junction optimized for fast recovery and low conduction loss. Its 500V repetitive peak reverse voltage and 35ns reverse recovery time enable operation in 100–500kHz switching topologies with minimal switching loss.
Thermally, it delivers 5°C/W junction-to-case resistance in the ITO-220AC package, supporting continuous 5A conduction up to 150°C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - Maximum non-repetitive reverse blocking voltage; defines safe operating range in boost/flyback output stages |
| IF | 5 A - Continuous average forward current; sets minimum heatsink sizing for 100% duty-cycle operation |
| trr | 35 ns - Measured at IF = 0.5A, IR = 1.0A, Irr = 0.25A; enables high-frequency rectification with low switching loss |
| VF (max) | 1.300 V @ 5A, 25°C - Directly determines conduction loss (Pcond ≈ 6.5W at full load); impacts thermal design margin |
| RθJC | 5 °C/W - Junction-to-case thermal resistance; allows direct calculation of case temperature rise under known power dissipation |
| IFSM | 125 A - Non-repetitive surge rating (8.3ms half-sine); supports inrush and fault-current handling in SMPS startup |
Pinout & Package
Package: ITO-220AC - 3-terminal through-hole package with isolated tab (cathode-connected), matte tin-plated leads, UL 94V-0 molding compound, and 0.56 N·m maximum mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to input/source side of rectifier path; requires PCB trace width sufficient for 5A continuous |
| Cathode (Tab & Lead 2) | Forward current exit / Heat sink interface | Electrically and thermally connected to metal tab; must be mounted to heatsink with electrically insulating but thermally conductive interface |
| NC / Isolation | No internal connection | ITO-220AC has no third functional terminal; tab is cathode, not isolated |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reliability and moisture resistance without hermetic sealing |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in industrial and automotive power systems |
| AEC-Q101 qualified version available | SFAF505GH meets stress-test requirements for automotive under-hood applications (e.g., engine control DC-DC) |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth on matte tin leads, ensuring long-term solder joint integrity in high-reliability systems |
Applications
| DC-DC Converter Output Rectification | Automotive DC-DC Module |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated 12V→3.3V/5V buck-derived converters. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; defines efficiency and thermal profile. Use Value: 35ns trr minimizes reverse recovery loss; 1.300V VF limits conduction loss to ≤6.5W at 5A, reducing heatsink requirements. | Use Scenario: 12V battery-fed DC-DC supply for ADAS camera modules or infotainment head units. IC Role / Device Role / Timing Role: Main output rectifier in 200–300kHz flyback converter; exposed to transient surges and wide ambient temperature swings. Use Value: AEC-Q101-qualified variant (SFAF505GH) ensures validated reliability; 125A IFSM withstands load-dump transients per ISO 7637-2. |
| Switching Inverter Freewheeling | Industrial AC-DC Power Supply |
Use Scenario: Freewheeling path across IGBTs in motor drive inverters (e.g., HVAC compressors). IC Role / Device Role / Timing Role: Provides low-loss current recirculation during IGBT turn-off; clamps inductive kickback. Use Value: 500V VRRM safely blocks bus voltage spikes; 5°C/W RθJC enables direct heatsink mounting for compact thermal design. | Use Scenario: Primary-side bridge rectifier or secondary-side output rectifier in 1kW telecom rectifiers. IC Role / Device Role / Timing Role: High-efficiency power conversion element operating continuously at elevated ambient temperatures (up to 85°C). Use Value: 150°C TJMAX and RoHS/halogen-free construction meet IPC-1752 and EU EcoDesign 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 |
|---|---|---|---|
| STTH5L06 | VRRM = 600V, trr = 35ns, VF = 1.35V @ 5A - Slightly higher VF, same speed | Widely used in industrial SMPS; lacks AEC-Q101 option | Select when 600V margin is required and automotive qualification is unnecessary |
| VS-5EYH05-M3 | VRRM = 500V, trr = 30ns, VF = 1.25V @ 5A - Faster recovery, lower VF, DPAK package | Surface-mount alternative; lower thermal resistance to PCB but no isolated tab | Select for space-constrained SMT designs where heatsinking via tab is not feasible |
Compared with STTH5L06 and VS-5EYH05-M3, the SFAF505G offers a balanced trade-off of 500V rating, 35ns speed, through-hole mechanical robustness, and optional AEC-Q101 qualification-making it optimal for cost-sensitive, thermally demanding, or automotive-qualified through-hole power supplies.
Availability
SFAF505G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SFAF505G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and automotive markets since 1979.
The SFAF505G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC power conversion where fast recovery, low VF, and rugged packaging are essential.
FAQ
What is the maximum junction temperature rating for the SFAF505G?
The SFAF505G has a maximum junction temperature (TJMAX) of +150°C, verified per absolute maximum ratings table. This allows continuous operation in high-ambient environments when paired with appropriate heatsinking. Derating curves in the datasheet specify usable current vs. case temperature, and the device must remain within this limit to ensure reliability and avoid thermal runaway.
Is the SFAF505G pin-compatible with other devices in the SFAF50xG series?
Yes, all SFAF501G–SFAF508G devices share identical ITO-220AC packaging, pinout, and mechanical dimensions. Only VRRM (50–600V) and VF (0.975–1.700V) vary across the series. This enables drop-in voltage-scaling substitutions in existing layouts without PCB changes, provided thermal and surge margins are re-verified for the new rating.
Does the SFAF505G have AEC-Q101 qualification?
The base SFAF505G is not AEC-Q101 qualified, but the variant SFAF505GH is explicitly qualified per AEC-Q101 Rev D. The "H" suffix denotes automotive-grade screening including HTGB, TC, HTRB, and UHAST testing. For automotive applications, only SFAF505GH should be specified and sourced.
What is the reverse recovery time test condition for the SFAF505G?
The SFAF505G reverse recovery time (trr) is measured at IF = 0.5A, IR = 1.0A, and Irr = 0.25A, per JEDEC standard conditions. The typical value is ≤35ns, confirmed across production lots. This test setup reflects real-world commutation behavior in hard-switched converters and directly impacts switching loss calculations for the SFAF505G.
How does the SFAF505G compare to standard fast recovery diodes in terms of efficiency?
The SFAF505G achieves higher efficiency than standard fast recovery diodes due to its 35ns trr and 1.300V VF max - significantly faster than 50–100ns FRDs and lower VF than many 600V-class alternatives. In a 200kHz 5A converter, this reduces total losses by ~15–20% versus legacy FRDs, directly improving thermal design margin and system efficiency for the SFAF505G.
SFAF505G C0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- 70pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAF505G C0G FAQ
1.How can I place an order for SFAF505G C0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF505G C0G 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 SFAF505G C0G reliable?
The price and inventory of SFAF505G C0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF505G C0G is usually 5 days.
3.What payment methods are accepted for SFAF505G C0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF505G C0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF505G C0G?
SFAF505G C0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF505G C0G 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 SFAF505G C0G?
For technical support, including SFAF505G C0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF505G C0G requirements.
6.How does Aetrix verify that SFAF505G C0G is sourced from the original manufacturer or authorized distributors?
All SFAF505G C0G 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 SFAF505G C0G meets industry standards.
7.What is the process for return or replacement of SFAF505G C0G?
All SFAF505G C0G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF505G C0G, 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 SFAF505G C0G part is unused and in its original packaging.
Return procedure for SFAF505G C0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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