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Taiwan Semiconductor Corporation SFAF2005G
- Part No.:
- SFAF2005G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF2005G.pdf
- Description:
- 35NS, 20A, 300V, SUPER FAST RECO
- Quantity:
- Payment:
- Shipping:
Inventory:9,710
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Product details
Overview
SFAF2005G from Taiwan Semiconductor is a 20 A, 300 V repetitive peak reverse voltage (VRRM) super fast rectifier diode in ITO-220AC package, featuring 1.300 V forward voltage at 20 A and 25°C, 35 ns reverse recovery time, and 150 pF junction capacitance - deployed in DC-DC converters and switching inverters requiring high efficiency and low conduction loss.
For engineers reviewing the SFAF2005G datasheet, SFAF2005G pinout, SFAF2005G application, or SFAF2005G equivalent, key selection criteria include verified VRRM = 300 V, IF = 20 A continuous rating, trr ≤ 35 ns, RθJC = 3°C/W thermal resistance, and AEC-Q101 qualification eligibility (via SFAF2005GH variant).
Technical Context
This super fast rectifier uses a glass passivated silicon die optimized for high-frequency switching applications. Its 35 ns reverse recovery time and low 150 pF junction capacitance minimize switching losses in hard-switched topologies, while the single-die ITO-220AC construction supports direct heatsink mounting with 0.56 N·m max torque.
The device operates across –55°C to +150°C junction temperature range and sustains 200 A non-repetitive surge current (8.3 ms half-sine). Forward voltage remains stable under 25°C–125°C operating conditions, with IR ≤ 400 µA at 125°C and rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling paths |
| IF | 20 A - average forward current rating at case temperature ≤ 100°C; determines continuous power handling |
| trr | 35 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables operation up to ~3 MHz switching frequency |
| VF | 1.300 V @ 20 A, 25°C - directly impacts conduction loss and thermal design in high-current output stages |
| RθJC | 3°C/W - junction-to-case thermal resistance; enables precise heatsink sizing for 20 A continuous load |
| CJ | 150 pF @ 1 MHz, 4.0 V - limits capacitive turn-on loss and EMI generation in high-dv/dt environments |
| IFSM | 200 A - 8.3 ms single half-sine surge rating; withstands inrush and fault currents without failure |
Pinout & Package
Package: ITO-220AC - insulated thermoplastic outline with isolated collector tab, UL 94V-0 molding compound, matte tin-plated leads compliant with J-STD-002 solderability, and polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to source/switch node in freewheeling path; requires low-inductance layout |
| Cathode (Tab) | Forward current exit / heat transfer surface | Electrically active and thermally conductive; must be mounted to heatsink with electrically isolating thermal pad if system ground referenced |
| Cathode (Lead 2) | Secondary cathode connection | Provides redundant current path and mechanical stability; tied to same potential as tab |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable long-term reliability and moisture resistance without hermetic sealing |
| UL Recognized (E-326243) | Validates flammability, insulation, and safety compliance for end-equipment certification |
| AEC-Q101 qualification option | Available as SFAF2005GH for automotive-grade stress testing (HTOL, TC, HTRB, etc.) |
| Low VF and low CJ | Reduces both conduction and switching losses simultaneously in high-frequency SMPS designs |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for industrial and automotive longevity |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: High-efficiency 48 V to 12 V isolated buck-derived converter in telecom power supply. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement; handles 20 A continuous forward current during low-side conduction phase. Use Value: 1.300 V VF reduces conduction loss by ~15% vs. standard FRDs; 35 ns trr enables >200 kHz operation without excessive switching loss. | Use Scenario: Three-phase motor drive inverter leg with regenerative braking. IC Role / Device Role / Timing Role: Freewheeling path for inductive load current when IGBTs are off; clamps voltage spikes during turn-off. Use Value: 200 A IFSM withstands motor stall surges; 300 V VRRM provides 2× margin over 150 V bus, ensuring robustness. |
| Industrial SMPS Secondary Side | Automotive On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: 24 V/15 A auxiliary power rail in PLC controller with wide ambient temperature range. IC Role / Device Role / Timing Role: Main output rectifier in forward or LLC resonant converter secondary. Use Value: –55°C to +150°C TJ rating supports uncooled operation in sealed enclosures; RθJC = 3°C/W simplifies thermal interface design. | Use Scenario: 12 V auxiliary supply in 6.6 kW OBC using SiC primary-side switching. IC Role / Device Role / Timing Role: Secondary-side rectifier in isolated flyback stage powering gate drivers and MCU. Use Value: AEC-Q101 qualified variant (SFAF2005GH) meets automotive reliability requirements; RoHS/halogen-free compliance satisfies OEM material specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2003D | VRRM = 300 V, IF = 20 A, trr = 35 ns, but TO-220AC package with different lead spacing and no AEC-Q101 option | Same electrical specs but lacks automotive qualification path; UL recognition not claimed | Select when cost sensitivity outweighs automotive qualification need and PCB footprint allows TO-220AC |
| VS-20EWH03-M3 | VRRM = 300 V, IF = 20 A, trr = 30 ns, VF = 1.25 V @ 20 A, but ITO-220AB (non-isolated tab) package | Lower VF and faster trr, but tab is electrically connected to cathode - requires isolation redesign if heatsink is grounded | Select when thermal performance is prioritized and system-level isolation permits non-isolated tab mounting |
Compared with STTH2003D and VS-20EWH03-M3, the SFAF2005G offers ITO-220AC's isolated tab for flexible heatsinking, UL recognition, and AEC-Q101 qualification pathway - making it preferable for safety-critical and automotive-adjacent industrial systems where isolation and certification matter.
Availability
SFAF2005G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for SFAF2005G 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 diodes, MOSFETs, and ICs for industrial and automotive markets.
The SFAF2005G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power supplies where low trr, stable VF, and rugged surge capability are essential - targeting telecom, industrial SMPS, and EV auxiliary systems.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the SFAF2005G?
The SFAF2005G has a VRRM rating of 300 V, confirmed in the Absolute Maximum Ratings table for the SFAF2005G row. This value is fixed per part number and distinct from other variants in the SFAF2001G–SFAF2008G series, which span 50 V to 600 V. It defines the highest reverse voltage the device can block repeatedly without breakdown.
Does the SFAF2005G have AEC-Q101 qualification?
The base SFAF2005G is not AEC-Q101 qualified, but the pin-compatible SFAF2005GH variant is explicitly listed as AEC-Q101 qualified in the Ordering Information section. The "H" suffix denotes qualification, and both share identical electrical and thermal specifications - only reliability testing differs.
What is the forward voltage (VF) of the SFAF2005G at full rated current?
The SFAF2005G exhibits a maximum forward voltage of 1.300 V at IF = 20 A and TJ = 25°C, per the Electrical Specifications table. This value increases with junction temperature but remains within 1.55 V at 125°C, supporting accurate loss modeling in thermal-aware designs.
How is thermal management handled for the SFAF2005G?
The SFAF2005G uses an ITO-220AC package with RθJC = 3°C/W, meaning 3°C temperature rise per watt dissipated at the junction-to-case interface. Effective heatsinking requires mounting the isolated tab to a thermally conductive surface with appropriate thermal interface material, respecting the 0.56 N·m maximum mounting torque.
What does the "G" suffix in SFAF2005G indicate?
The "G" suffix in SFAF2005G indicates RoHS-compliant and halogen-free construction per IEC 61249-2-21, confirmed in the FEATURES section. It also denotes green molding compound and UL Recognition File # E-326243 - distinguishing it from non-RoHS or non-UL versions in legacy ordering codes.
SFAF2005G 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):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- 150pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAF2005G FAQ
1.How can I place an order for SFAF2005G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF2005G 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 SFAF2005G reliable?
The price and inventory of SFAF2005G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF2005G is usually 5 days.
3.What payment methods are accepted for SFAF2005G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF2005G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF2005G?
SFAF2005G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF2005G 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 SFAF2005G?
For technical support, including SFAF2005G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF2005G requirements.
6.How does Aetrix verify that SFAF2005G is sourced from the original manufacturer or authorized distributors?
All SFAF2005G 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 SFAF2005G meets industry standards.
7.What is the process for return or replacement of SFAF2005G?
All SFAF2005G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF2005G, 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 SFAF2005G part is unused and in its original packaging.
Return procedure for SFAF2005G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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