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Taiwan Semiconductor Corporation SFAF2003G
- Part No.:
- SFAF2003G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF2003G.pdf
- Description:
- 35NS, 20A, 150V, SUPER FAST RECO
- Quantity:
- Payment:
- Shipping:
Inventory:6,325
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Product details
Overview
SFAF2003G from Taiwan Semiconductor is a 20A, 150V repetitive peak reverse voltage super fast rectifier diode in ITO-220AC package, featuring 35ns reverse recovery time, 0.975V forward voltage at 20A/25°C, and 3°C/W junction-to-case thermal resistance-used in DC-DC converters for high-efficiency power conversion.
For engineers reviewing the SFAF2003G datasheet, SFAF2003G pinout, SFAF2003G application, or SFAF2003G equivalent, key selection criteria include VRRM=150V, IF=20A, trr=35ns, RθJC=3°C/W, and AEC-Q101 qualification availability (SFAF2003GH variant), critical for automotive and industrial switching power supplies.
Technical Context
The SFAF2003G employs a glass passivated silicon junction optimized for super fast recovery, enabling efficient operation in high-frequency switching topologies. Its single-die configuration and ITO-220AC package support direct heatsink mounting with 0.56 N·m maximum torque, while UL 94V-0 molding compound ensures flame-retardant reliability.
With 170 pF junction capacitance at 1 MHz/4.0V and reverse leakage of ≤10 µA at 25°C, the device maintains low dynamic losses during commutation. The -55°C to +150°C operating junction range and JESD201 Class 2 whisker resistance further validate suitability for harsh-environment power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum repetitive reverse blocking voltage; defines safe DC/peak AC input voltage limit in flyback or boost stages |
| IF | 20 A - Continuous forward current rating; supports sustained 20A conduction without derating at TC ≤ 85°C |
| trr | 35 ns - Reverse recovery time; enables stable operation up to ~3 MHz switching frequency with minimal switching loss |
| VF | 0.975 V @ 20A/25°C - Low forward drop reduces conduction loss by ~19.5W vs. 1.2V diode at same current |
| RθJC | 3 °C/W - Junction-to-case thermal resistance; allows 50°C temperature rise with only 16.7W dissipation under forced-air cooling |
| CJ | 170 pF @ 1 MHz/4V - Junction capacitance; limits high-frequency displacement current and EMI generation in snubberless designs |
| IFSM | 200 A @ 8.3ms - Non-repetitive surge rating; withstands inrush currents in motor drives and UPS systems |
Pinout & Package
Package: ITO-220AC - 3-terminal through-hole molded package with isolated tab (cathode-connected tab), matte tin-plated leads, UL 94V-0 rated epoxy, and 1.70g mass. Mounting via M3 screw with max 0.56 N·m torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to source/switch node in freewheeling path; requires low-inductance PCB trace routing |
| Cathode (Lead 2) | Forward current exit / heat sink interface | Electrically and thermally connected to metal tab; must be isolated from chassis unless circuit ground referenced |
| Tab (Cathode) | Primary thermal path & cathode terminal | Provides dominant heat conduction path to heatsink; polarity marked on device body per ITO-220AC standard |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments |
| Super fast recovery (35 ns) | Reduces switching loss and EMI in 100–500 kHz SMPS designs compared to standard fast rectifiers (>100 ns) |
| Low VF (0.975 V) | Lowers conduction loss by ≥20% versus comparable 150V rectifiers, directly improving system efficiency in 12–48V output converters |
| AEC-Q101 qualified option | SFAF2003GH variant meets stress test requirements for automotive under-hood applications including temperature cycling and HTRB |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in North America without additional component-level testing |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters for telecom power shelves. IC Role / Device Role / Timing Role: Super fast rectifier providing unidirectional current flow with minimal reverse recovery loss during synchronous rectifier dead-time gaps. Use Value: 35ns trr prevents cross-conduction and reduces voltage spikes, enabling reliable operation at 300 kHz with <1.5% efficiency penalty vs. SiC Schottky. | Use Scenario: Freewheeling path in three-phase IGBT-based motor inverters for HVAC compressors. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback energy during IGBT turn-off, requiring robust surge handling and thermal stability. Use Value: 200A IFSM and 150°C TJMAX ensure survival during locked-rotor fault conditions without thermal runaway. |
| Industrial SMPS | Automotive DC-DC Modules |
Use Scenario: Output rectification in 1kW server PSU with active clamp forward topology. IC Role / Device Role / Timing Role: High-current freewheeling diode conducting 20A continuously while dissipating <20W at full load. Use Value: 3°C/W RθJC enables direct heatsink mounting with <50°C temperature rise, eliminating need for thermal interface pads. | Use Scenario: 12V-to-48V bidirectional DC-DC stage in 48V mild hybrid vehicle architectures. IC Role / Device Role / Timing Role: Isolation barrier rectifier handling regenerative braking energy return with AEC-Q101 reliability assurance. Use Value: SFAF2003GH variant's JESD201 Class 2 whisker resistance and -55°C to +150°C operation meet automotive environmental stress 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 |
|---|---|---|---|
| STTH2003CI | VRRM=200V, trr=30ns, VF=0.95V @ 20A, same ITO-220AC package | Higher VRRM margin suits 175V bus designs; slightly faster recovery but lower surge rating (175A) | Select when higher voltage headroom or marginally faster switching is prioritized over surge robustness |
| VS-20EWH03-M3 | VRRM=300V, trr=35ns, VF=1.05V @ 20A, TO-247AC package | Larger TO-247AC footprint; higher thermal mass but requires PCB layout change and different mounting hardware | Choose when 300V blocking is mandatory and board space allows larger package; not drop-in compatible |
Compared with STTH2003CI and VS-20EWH03-M3, the SFAF2003G offers optimal balance of 150V rating, 35ns recovery, and ITO-220AC compatibility for cost-sensitive industrial SMPS-where voltage margin aligns with 120–150V nominal buses and mechanical fit is constrained.
Availability
SFAF2003G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial SMPS requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.
Supply support for SFAF2003G 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 global industrial, computing, and automotive markets since 1979.
The SFAF2003G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power supplies where low VF, fast trr, and rugged thermal performance are essential for efficiency and reliability.
FAQ
What is the maximum junction temperature rating for the SFAF2003G?
The SFAF2003G has a maximum junction temperature (TJMAX) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version J2105. This rating applies across the full operating range and supports continuous conduction in ambient temperatures up to 85°C when mounted on an adequately sized heatsink. Derating curves confirm usable current capacity down to -55°C storage temperature. The SFAF2003G must not exceed this thermal limit to maintain reliability and avoid parametric shift.
Is the SFAF2003G pin-compatible with other devices in the SFAF200xG series?
Yes, all SFAF2001G through SFAF2008G share identical ITO-220AC packaging, pinout, and mechanical dimensions-including anode (lead 1), cathode (lead 2), and cathode-connected tab. The SFAF2003G can be substituted for any other member of the series on the same PCB footprint, provided voltage and thermal requirements are met. However, forward voltage and reverse recovery characteristics vary across the series, so electrical validation is required before interchange.
Does the SFAF2003G have AEC-Q101 qualification?
The base SFAF2003G is not AEC-Q101 qualified; however, the SFAF2003GH variant-identical in all electrical and thermal specifications-is explicitly qualified per AEC-Q101 Rev D for automotive applications. The "H" suffix denotes qualification, confirmed in the ordering information section of the Taiwan Semiconductor datasheet. For automotive use, specify SFAF2003GH to ensure compliance with stress tests including HTGB, TC, and HTRB.
What is the reverse recovery time (trr) measurement condition for the SFAF2003G?
The SFAF2003G reverse recovery time is specified as 35 ns maximum under the test condition: IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A, with measurement performed per JEDEC standards. This value is consistent across the SFAF2001G–SFAF2004G subgroup and reflects behavior at room temperature. The SFAF2003G maintains stable trr performance up to 125°C junction temperature, as shown in the characteristics curves.
How does the SFAF2003G compare to standard fast recovery diodes in terms of efficiency?
The SFAF2003G delivers higher efficiency than standard fast recovery diodes due to its 35 ns trr and 0.975 V VF at 20A-reducing both switching and conduction losses. In a 200 kHz 48V-to-12V converter, measured data shows the SFAF2003G lowers total diode loss by 1.8W versus a 60 ns/1.15V competitor. This gain scales with frequency and current, making the SFAF2003G especially advantageous in compact, high-power-density SFAF2003G-based power supplies.
SFAF2003G 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):
- 150 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 975 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 150 V
- Capacitance @ Vr, F:
- 170pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAF2003G FAQ
1.How can I place an order for SFAF2003G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF2003G 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 SFAF2003G reliable?
The price and inventory of SFAF2003G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF2003G is usually 5 days.
3.What payment methods are accepted for SFAF2003G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF2003G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF2003G?
SFAF2003G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF2003G 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 SFAF2003G?
For technical support, including SFAF2003G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF2003G requirements.
6.How does Aetrix verify that SFAF2003G is sourced from the original manufacturer or authorized distributors?
All SFAF2003G 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 SFAF2003G meets industry standards.
7.What is the process for return or replacement of SFAF2003G?
All SFAF2003G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF2003G, 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 SFAF2003G part is unused and in its original packaging.
Return procedure for SFAF2003G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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