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Taiwan Semiconductor Corporation SFAF501G
- Part No.:
- SFAF501G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF501G.pdf
- Description:
- 35NS, 5A, 50V, SUPER FAST RECOVE
- Quantity:
- Payment:
- Shipping:
Inventory:7,675
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Product details
Overview
SFAF501G from Taiwan Semiconductor is a 5 A, 50 V repetitive peak reverse voltage super fast rectifier diode in ITO-220AC package, featuring 35 ns reverse recovery time, 0.975 V forward voltage at 5 A and 25°C, and 5 °C/W junction-to-case thermal resistance-designed for high-efficiency DC-DC converters and freewheeling paths in automotive-grade power supplies.
For engineers reviewing the SFAF501G datasheet, SFAF501G pinout, SFAF501G application, or SFAF501G equivalent, key selection criteria include its AEC-Q101 qualification option (SFAF501GH), low VF performance at rated current, surge capability (125 A IFSM), and thermal performance in high-density board layouts requiring reliable conduction under transient loads.
Technical Context
The SFAF501G employs a single-die, glass-passivated silicon junction optimized for fast switching with minimal reverse recovery charge. Its 35 ns trr and 70 pF junction capacitance support operation in high-frequency switching topologies up to several hundred kHz without excessive switching loss.
Rated for TJ = –55°C to +150°C and UL Recognized (E-326243), the device delivers stable conduction under pulsed and continuous loads, with IR ≤ 10 µA at 25°C and ≤ 400 µA at 125°C-enabling use in thermally constrained environments where leakage-sensitive bias networks exist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines minimum system isolation margin in 12–24 V DC-DC outputs. |
| IF | 5 A - Continuous average forward current; supports sustained load delivery without derating below 100°C case temperature. |
| IFSM | 125 A - Non-repetitive surge rating (8.3 ms half-sine); withstands inrush and fault currents in motor drives and SMPS startup. |
| VF @ 5 A, 25°C | 0.975 V - Low conduction loss; reduces power dissipation to ≤4.875 W at full rated current, easing thermal design. |
| trr | 35 ns - Fast reverse recovery; minimizes switching losses and EMI in 100–500 kHz hard-switched converters. |
| RθJC | 5 °C/W - Thermal resistance from junction to case; enables direct heatsink mounting for >3 W steady-state dissipation. |
Pinout & Package
Package: ITO-220AC - Insulated TO-220 variant with isolated tab, matte tin-plated leads, UL 94V-0 molding compound, and 0.56 N·m maximum mounting torque. Polarity marked on device body.
| 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 to minimize voltage overshoot during turn-off. |
| Cathode (Lead 2) | Forward current exit / reverse blocking terminal | Typically tied to switching node or output rail; serves as reference for voltage clamping and freewheeling return path. |
| Tab (Isolated) | Thermal interface only | Electrically isolated metal surface for heatsink attachment; no electrical connection-must not be used as ground or signal reference. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and moisture resistance in humid or automotive under-hood environments. |
| AEC-Q101 qualified version available (SFAF501GH) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, and HAST. |
| UL Recognized (E-326243) | Confirms flammability, tracking, and dielectric strength compliance for safety-critical AC/DC and industrial power systems. |
| Halogen-free per IEC 61249-2-21 | Meets RoHS and environmental compliance mandates for end-of-life recycling and thermal decomposition safety. |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V to 5 V/3.3 V buck-derived converters operating at 200–300 kHz. IC Role / Device Role / Timing Role: Unidirectional conduction path delivering regulated output while blocking reverse voltage during transformer reset. Use Value: 0.975 V VF at 5 A reduces conduction loss by ~15% vs. standard FRDs, improving efficiency by 0.8–1.2% at full load. | Use Scenario: Freewheeling path across inductive loads (e.g., BLDC motor phases) in 48 V automotive inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation during PWM off-time, preventing voltage spikes and MOSFET avalanche stress. Use Value: 35 ns trr limits reverse recovery charge (Qrr), reducing switching loss and EMI generation during commutation transitions. |
| Automotive Body Control Module Power Supply | Industrial PLC Input Protection Stage |
Use Scenario: Input rectification and hold-up in 24 V nominal BMS-supplied power rails for BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Converts rectified AC or battery-fed unregulated input to stable DC bus; handles cold-crank and load-dump transients. Use Value: 125 A IFSM and –55°C to +150°C TJ range ensure uninterrupted operation during automotive thermal and surge stress events. | Use Scenario: Reverse polarity and surge protection in 24 V DC input stages of programmable logic controllers exposed to field wiring faults. IC Role / Device Role / Timing Role: Blocks reverse current and clamps transient overvoltage via controlled avalanche behavior during induced surges. Use Value: 10 µA IR at 25°C ensures negligible standby leakage in always-on monitoring circuits, preserving system quiescent current budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH5L06D (STMicroelectronics) | 600 V VRRM, 5 A IF, VF = 1.15 V @ 5 A, trr = 30 ns, TO-220AC package | Higher voltage rating suits 48 V+ systems; slightly higher VF increases conduction loss in 12–24 V rails | Select when system requires ≥400 V blocking or tighter trr tolerance; verify layout compatibility with identical footprint. |
| ES5J (ON Semiconductor) | 600 V VRRM, 5 A IF, VF = 1.7 V @ 5 A, trr = 35 ns, DO-201AD package | Lower thermal performance (RθJC ≈ 40 °C/W), surface-mount only, no isolated tab | Prefer for cost-sensitive, low-power, space-constrained designs where heatsinking is impractical and 50 V rating is sufficient. |
Compared with STTH5L06D and ES5J, the SFAF501G offers optimal balance of low VF (0.975 V), robust 50 V rating, and ITO-220AC thermal performance-making it ideal for thermally demanding 12–24 V automotive and industrial DC-DC applications where efficiency and reliability are prioritized over ultra-high voltage headroom.
Availability
SFAF501G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching mode inverter freewheeling, and automotive body control module power supplies requiring stable component supply across production lifecycles.
Supply support for SFAF501G 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 automotive, industrial, and consumer markets since 1979.
The SFAF501G belongs to TSC's Super Fast Rectifier family-engineered specifically for high-frequency, high-reliability power conversion where low VF, fast trr, and AEC-Q101 readiness are critical in compact, thermally constrained designs.
FAQ
What is the maximum junction temperature rating for the SFAF501G?
The SFAF501G has a maximum junction temperature (TJ MAX) of +150°C, with operational range from –55°C to +150°C. This rating allows sustained operation in under-hood automotive environments and industrial enclosures without forced cooling, provided thermal design maintains junction temperature within limit using the 5 °C/W RθJC value.
Does the SFAF501G have AEC-Q101 qualification?
The base SFAF501G is not AEC-Q101 qualified; however, the AEC-Q101 qualified version is explicitly designated as SFAF501GH in the ordering code. Both share identical electrical and thermal specifications, but only SFAF501GH undergoes the full stress test suite required for automotive powertrain and chassis applications.
What is the reverse recovery time (trr) of the SFAF501G and under what conditions is it measured?
The SFAF501G has a reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value reflects performance in typical high-frequency switching scenarios and is validated per JEDEC standards for super fast rectifiers.
Can the SFAF501G replace a standard FR107 diode in an existing design?
The SFAF501G is not a drop-in replacement for FR107 due to differences in VRRM (50 V vs. 1000 V), VF (0.975 V vs. ~1.3 V), and package (ITO-220AC vs. DO-41). It may be used only where 50 V blocking suffices and thermal performance justifies the larger ITO-220AC footprint-requiring layout and stress re-evaluation.
What is the marking code and packaging format for the SFAF501G?
The SFAF501G is marked "SFAF501G" on the device body and supplied in tubes of 50 units per tube. The "G" suffix denotes green (halogen-free) compound per IEC 61249-2-21, and date code follows YWW (year-week) format per TSC standard marking diagram.
SFAF501G 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):
- 50 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 975 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 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
SFAF501G FAQ
1.How can I place an order for SFAF501G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF501G 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 SFAF501G reliable?
The price and inventory of SFAF501G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF501G is usually 5 days.
3.What payment methods are accepted for SFAF501G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF501G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF501G?
SFAF501G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF501G 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 SFAF501G?
For technical support, including SFAF501G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF501G requirements.
6.How does Aetrix verify that SFAF501G is sourced from the original manufacturer or authorized distributors?
All SFAF501G 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 SFAF501G meets industry standards.
7.What is the process for return or replacement of SFAF501G?
All SFAF501G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF501G, 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 SFAF501G part is unused and in its original packaging.
Return procedure for SFAF501G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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