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Taiwan Semiconductor Corporation SFA803G
- Part No.:
- SFA803G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
SFA803G.pdf
- Description:
- 35NS, 8A, 150V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:5,750
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Product details
Overview
SFA803G from Taiwan Semiconductor is an AEC-Q101-qualified super fast rectifier diode in TO-220AC package, rated for 150 V repetitive peak reverse voltage (VRRM), 8 A average forward current (IF), and 125 A non-repetitive surge current (IFSM), used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the SFA803G datasheet, SFA803G pinout, SFA803G application, or SFA803G equivalent, key selection criteria include VF = 0.975 V at IF = 8 A and TJ = 25°C, trr = 35 ns, CJ = 100 pF at 1 MHz/4.0 V, RθJC = 4 °C/W, and AEC-Q101 qualification status.
Technical Context
The SFA803G is a single-die, unidirectional super fast recovery rectifier optimized for high-frequency switching applications. It delivers low conduction loss via VF ≤ 0.975 V and rapid commutation with trr ≤ 35 ns under IF = 0.5 A / IR = 1.0 A / Irr = 0.25 A test conditions.
Thermally, it features a junction-to-case thermal resistance of 4 °C/W and operates across –55°C to +150°C junction temperature range. Its TO-220AC package supports direct heatsink mounting with max torque of 0.56 N·m and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum repetitive reverse blocking voltage; defines usable DC bus or output voltage headroom in flyback/freewheeling paths |
| IF | 8 A - Continuous average forward current at TC = 100°C; sets steady-state power stage current rating |
| IFSM | 125 A - Non-repetitive 8.3 ms surge capability; enables robustness against startup inrush or short-circuit transients |
| VF | 0.975 V @ IF = 8 A, TJ = 25°C - Low forward drop reduces conduction loss and improves efficiency in high-duty-cycle converters |
| trr | 35 ns - Ultra-fast reverse recovery time minimizes switching loss and EMI in >100 kHz SMPS designs |
| RθJC | 4 °C/W - Thermal resistance from junction to case; enables precise heatsink sizing for thermal management |
| CJ | 100 pF @ 1 MHz, VR = 4.0 V - Low junction capacitance limits displacement current and improves high-frequency noise immunity |
Pinout & Package
TO-220AC package: single-ended, 3-lead outline with center tab (cathode) electrically connected to the metal tab; anode and cathode terminals on outer leads; polarity marked on device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to input/source side of rectification path; must withstand full reverse voltage when off |
| Cathode (Lead 2) | Forward current exit | Electrically tied to metal tab; serves as primary heat transfer path and common reference node |
| Metal Tab (Cathode) | Thermal & electrical cathode node | Provides low-thermal-resistance path to heatsink; requires insulating washer if mounted to grounded chassis |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | Validated for automotive powertrain and body electronics per stress test requirements (HTOL, TCT, HTRB, etc.) |
| Super fast recovery (trr ≤ 35 ns) | Enables operation in high-frequency (>200 kHz) topologies without excessive switching loss or ringing |
| Low VF = 0.975 V @ 8 A | Reduces conduction loss by ~15–20% vs. standard fast rectifiers, improving system efficiency at full load |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for environmentally regulated industrial and automotive production |
| Junction temp range –55°C to +150°C | Supports operation in under-hood or high-ambient industrial environments without derating below –40°C |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 48 V–12 V buck-derived DC-DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Unidirectional power switch conducting during positive half-cycle; replaces slower FRDs to reduce losses. Use Value: 0.975 V VF and 35 ns trr cut total rectifier loss by ≥1.2 W at 8 A/100 kHz, improving full-load efficiency by 0.8–1.1%. | Use Scenario: Freewheeling path in three-phase motor drive inverters operating up to 20 kHz PWM frequency. IC Role / Device Role / Timing Role: Clamp-inductive kickback during IGBT turn-off; recovers before next switching edge. Use Value: 35 ns trr prevents tail-current overlap with IGBT switching, reducing cross-conduction loss and MOSFET/IGBT stress. |
| Freewheeling Diode | Automotive Power Supply |
Use Scenario: Inductor current续流 path in non-isolated buck regulators powering ADAS ECUs and infotainment systems. IC Role / Device Role / Timing Role: Provides low-loss return path during high-side switch off-time; handles continuous 8 A DC current. Use Value: 4 °C/W RθJC allows direct mounting to aluminum chassis, eliminating need for external heatsink in space-constrained modules. | Use Scenario: Input rectification and transient clamping in 12 V/24 V automotive front-end power supplies meeting ISO 7637-2 pulse 5a/b. IC Role / Device Role / Timing Role: AEC-Q101-qualified rectifier handling cold-crank (–40°C) to load-dump (+150°C) thermal cycling. Use Value: –55°C to +150°C TJ range and 125 A IFSM ensure reliability during engine start-stop cycles and alternator overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8L06D (STMicroelectronics) | VRRM = 600 V, VF = 1.7 V @ 8 A, trr = 35 ns, TO-220AC | Higher voltage rating but higher VF; less efficient at 150 V-class designs | Select only if system requires >300 V blocking margin or legacy 600 V design reuse |
| VS-8EWH06FN-M3 (Vishay) | VRRM = 600 V, VF = 1.75 V @ 8 A, trr = 25 ns, TO-220AC | Faster trr but significantly higher VF; better for ultra-high-frequency but worse thermal performance at DC | Prefer only when trr < 30 ns is mandatory and VF penalty is acceptable in thermally relaxed layouts |
Compared with STTH8L06D and VS-8EWH06FN-M3, the SFA803G offers optimal balance of 150 V rating, 0.975 V VF, and 35 ns trr-enabling highest efficiency in 12–48 V automotive and industrial SMPS where voltage margin and thermal density are tightly constrained.
Availability
SFA803G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, AEC-Q101 qualification, and consistent thermal performance across temperature extremes.
Supply support for SFA803G 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, automotive, and computing markets since 1979.
The SFA803G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive-grade and industrial-grade switching power supplies.
FAQ
What is the maximum junction temperature rating for the SFA803G?
The SFA803G has a maximum junction temperature (TJ MAX) of +150°C and a minimum of –55°C. This wide operating range allows the SFA803G to function reliably in under-hood automotive environments and high-ambient industrial enclosures without additional derating below –40°C ambient. The SFA803G's thermal performance is validated per JEDEC standards.
Is the SFA803G pin-compatible with other devices in the SFA801G–SFA808G series?
Yes, all SFA801G through SFA808G share identical TO-220AC packaging, pinout, and mechanical footprint-including anode (lead 1), cathode (lead 2), and electrically connected metal tab. The SFA803G can be substituted within the same family for voltage rating changes without PCB layout modification, provided thermal and electrical margins remain satisfied.
Does the SFA803G meet AEC-Q101 reliability requirements?
The base SFA803G is not AEC-Q101 qualified; however, the AEC-Q101-qualified version is designated SFA803GH and carries the "H" suffix. The SFA803GH undergoes full stress testing per AEC-Q101 including HTOL, TCT, HTRB, and UHAST, and is intended for automotive powertrain and body electronics applications where qualification is mandatory.
What is the reverse recovery time (trr) specification for the SFA803G?
The SFA803G has a typical reverse recovery time (trr) of 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is confirmed across the full –55°C to +150°C junction temperature range and enables clean commutation in switching power supplies operating above 100 kHz, minimizing switching loss and EMI generation.
How does the forward voltage (VF) of the SFA803G compare to higher-voltage variants in the same family?
The SFA803G exhibits VF = 0.975 V at IF = 8 A and TJ = 25°C-lower than SFA805G (1.300 V) and SFA807G (1.700 V) due to its lower VRRM (150 V vs. 300 V and 500 V). This makes the SFA803G the most efficient choice among the SFA801G–SFA808G series for 12–48 V applications where 150 V blocking is sufficient.
SFA803G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 975 mV @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 150 V
- Capacitance @ Vr, F:
- 100pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFA803G FAQ
1.How can I place an order for SFA803G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFA803G 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 SFA803G reliable?
The price and inventory of SFA803G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFA803G is usually 5 days.
3.What payment methods are accepted for SFA803G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFA803G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFA803G?
SFA803G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFA803G 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 SFA803G?
For technical support, including SFA803G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFA803G requirements.
6.How does Aetrix verify that SFA803G is sourced from the original manufacturer or authorized distributors?
All SFA803G 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 SFA803G meets industry standards.
7.What is the process for return or replacement of SFA803G?
All SFA803G units undergo pre-shipment inspection (PSI). If there is an issue with SFA803G, 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 SFA803G part is unused and in its original packaging.
Return procedure for SFA803G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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