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Taiwan Semiconductor Corporation SFAF508G
- Part No.:
- SFAF508G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF508G.pdf
- Description:
- DIODE GEN PURP 600V 5A ITO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SFAF508G from Taiwan Semiconductor is a 600 V, 5 A super fast rectifier diode in ITO-220AC package, featuring 1.700 V forward voltage at 5 A and 25°C, 35 ns reverse recovery time, and AEC-Q101 qualification option (SFAF508GH), used in high-efficiency DC-DC converters and switching inverters.
For engineers reviewing the SFAF508G datasheet, SFAF508G pinout, SFAF508G application, or SFAF508G equivalent, key selection criteria include peak reverse voltage (600 V), surge current rating (125 A), thermal resistance (5 °C/W), junction temperature limit (+150 °C), and UL recognition (E-326243).
Technical Context
The SFAF508G is a single-die, glass-passivated super fast recovery rectifier optimized for high-frequency switching applications. Its 35 ns trr and low 1.700 V VF at 5 A enable reduced conduction and switching losses in SMPS topologies.
Designed for automotive-grade reliability when ordered as SFAF508GH, it meets JESD201 Class 2 whisker resistance and operates across –55 °C to +150 °C junction temperature range with UL 94V-0 molding compound and matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - maximum repetitive reverse blocking voltage; defines safe operating ceiling in high-voltage DC bus or inverter leg applications |
| IF | 5 A - average forward current rating; determines continuous power handling capability under heatsink-limited thermal conditions |
| IFSM | 125 A - non-repetitive surge current (8.3 ms half-sine); supports motor startup or transient overload without failure |
| VF @ 5A, 25°C | 1.700 V - forward voltage drop; directly impacts conduction loss (P = IF × VF) and thermal design margin |
| trr | 35 ns - reverse recovery time; enables operation up to ~3–5 MHz switching frequencies with minimal switching loss penalty |
| RθJC | 5 °C/W - junction-to-case thermal resistance; allows precise heatsink sizing for target TJ ≤ 150 °C under 5 A load |
| TJ max | +150 °C - maximum junction temperature; sets upper thermal boundary for derating curves and system-level thermal management |
Pinout & Package
Package: ITO-220AC - isolated tab, single-diode configuration, matte tin-plated leads, UL 94V-0 mold compound, 1.70 g mass, 0.56 N·m max mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential side of circuit; must be routed with low-inductance path for fast-switching integrity |
| Cathode (Lead 2) | Forward current exit point | Connected to higher-potential rail; serves as reference node for gate drive or snubber networks |
| Tab (Case) | Electrically isolated metal thermal path | Provides primary heat dissipation route to heatsink; electrically floating-no internal connection to die |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr = 35 ns) | Enables high-frequency switching (>1 MHz) with minimized reverse recovery charge (Qrr) and associated EMI |
| Glass passivated junction | Ensures long-term stability of electrical parameters under humidity, thermal cycling, and bias stress |
| AEC-Q101 qualified variant available | Validated for automotive under-hood environments including temperature cycling, mechanical shock, and HTOL |
| UL Recognized (E-326243) | Confirms compliance with safety standards for end-equipment certification in industrial and consumer power supplies |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental directives for lead-free assembly and green manufacturing |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: High-efficiency isolated flyback or forward converter in telecom power supplies. IC Role / Device Role / Timing Role: Output rectifier handling 5 A continuous output current at 600 V blocking level. Use Value: Low VF (1.700 V) reduces conduction loss by ~15% vs. standard FRDs; 35 ns trr minimizes switching loss in 100–500 kHz designs. | Use Scenario: DC link freewheeling path in 3-phase motor drives or solar microinverters. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during IGBT/MOSFET turn-off. Use Value: 125 A IFSM withstands motor stall surges; 600 V VRRM supports 400 V DC bus with 50% safety margin. |
| Automotive On-Board Chargers | Industrial SMPS |
Use Scenario: Secondary-side rectification in bidirectional OBC modules meeting ISO 16750-4. IC Role / Device Role / Timing Role: High-reliability output diode in AEC-Q101-qualified design (SFAF508GH variant). Use Value: JESD201 Class 2 whisker resistance and –55 °C to +150 °C operation ensure field durability in engine bay environments. | Use Scenario: Main output rectifier in 1–3 kW industrial AC-DC front-end supplies. IC Role / Device Role / Timing Role: Primary high-voltage rectifier in bridge or center-tapped configurations. Use Value: UL E-326243 recognition simplifies end-product safety certification; 5 °C/W RθJC enables compact heatsink integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06DJF | 600 V, 8 A, VF = 1.75 V @ 8 A, trr = 30 ns, TO-220AC package | Higher current rating but larger VF at rated current; tighter trr spec | Select when >5 A average current or sub-30 ns trr is required; verify thermal interface compatibility with ITO-220AC footprint |
| VS-5EYH06-M3 | 600 V, 5 A, VF = 1.7 V @ 5 A, trr = 45 ns, TO-220AC package | Similar VF but slower recovery; no AEC-Q101 option listed | Acceptable where 45 ns trr is tolerable and automotive qualification is not required; check UL recognition status |
Compared with STTH8R06DJF and VS-5EYH06-M3, the SFAF508G offers balanced performance at 5 A with verified AEC-Q101 availability (SFAF508GH), UL recognition, and industry-standard ITO-220AC mechanical fit-making it optimal for cost-sensitive, certified, and thermally constrained designs.
Availability
SFAF508G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive on-board chargers requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for SFAF508G 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 SFAF501G–SFAF508G series targets high-efficiency power conversion systems demanding robustness, fast recovery, and regulatory compliance-including automotive-grade SMPS, renewable energy inverters, and UL-certified industrial power supplies.
FAQ
What is the maximum junction temperature rating for the SFAF508G?
The SFAF508G has a maximum junction temperature (TJ max) of +150 °C, validated across its full operating range from –55 °C to +150 °C. This rating enables reliable operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations when paired with appropriate heatsinking per its 5 °C/W RθJC specification. Derating curves in the datasheet define allowable IF versus case temperature.
Does the SFAF508G have AEC-Q101 qualification?
The SFAF508G itself is not automatically AEC-Q101 qualified; however, the AEC-Q101-qualified version is explicitly designated as SFAF508GH in the ordering code. This variant undergoes additional stress testing per AEC-Q101 Rev D, including temperature cycling, high-temperature operating life, and mechanical shock. Always specify "H" suffix when automotive-grade reliability is required for SFAF508G applications.
What is the reverse recovery time (trr) of the SFAF508G and how is it measured?
The SFAF508G has a maximum reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC standard test methods. This value reflects the diode's speed in transitioning from forward conduction to reverse blocking, directly influencing switching loss and EMI in high-frequency converters. The 35 ns trr is confirmed across the full SFAF507G–SFAF508G voltage grade subset.
Is the SFAF508G UL recognized and what is its file number?
Yes, the SFAF508G is UL Recognized under File # E-326243, covering the entire SFAF501G–SFAF508G family. This recognition applies to the ITO-220AC package with UL 94V-0 compliant molding compound and confirms compliance with UL 60747-5 for discrete semiconductors. It supports end-equipment safety certifications in North America and other UL-accepting regions.
What is the forward voltage (VF) of the SFAF508G at rated current and temperature?
The SFAF508G exhibits a maximum forward voltage (VF) of 1.700 V at IF = 5 A and TJ = 25 °C, per the datasheet's Electrical Specifications table. At elevated junction temperatures (e.g., 125 °C), VF decreases slightly due to semiconductor physics, but system-level thermal design must maintain TJ ≤ 150 °C to ensure long-term reliability and parameter stability across the SFAF508G lifetime.
SFAF508G 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):
- 600 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 600 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
SFAF508G FAQ
1.How can I place an order for SFAF508G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF508G 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 SFAF508G reliable?
The price and inventory of SFAF508G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF508G is usually 5 days.
3.What payment methods are accepted for SFAF508G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF508G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF508G?
SFAF508G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF508G 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 SFAF508G?
For technical support, including SFAF508G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF508G requirements.
6.How does Aetrix verify that SFAF508G is sourced from the original manufacturer or authorized distributors?
All SFAF508G 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 SFAF508G meets industry standards.
7.What is the process for return or replacement of SFAF508G?
All SFAF508G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF508G, 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 SFAF508G part is unused and in its original packaging.
Return procedure for SFAF508G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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