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Taiwan Semiconductor Corporation SFAF805G C0G
- Part No.:
- SFAF805G C0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF805G C0G.pdf
- Description:
- DIODE GEN PURP 300V 8A ITO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,020
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Product details
Overview
SFAF805G from Taiwan Semiconductor is an 8 A, 300 V repetitive peak reverse voltage super fast rectifier diode in ITO-220AC package, featuring 35 ns reverse recovery time, 1.300 V max forward voltage at 8 A and 25°C, 60 pF junction capacitance at 1 MHz/4 V, and 125 A surge capability - used in DC-DC converters and freewheeling paths in high-frequency switching power supplies.
For engineers reviewing the SFAF805G datasheet, SFAF805G pinout, SFAF805G application, or SFAF805G equivalent, key selection criteria include VRRM = 300 V, trr = 35 ns, VF ≤ 1.300 V @ 8 A, RθJC = 4°C/W, and ITO-220AC thermal/mechanical compatibility with heatsink-mounting requirements.
Technical Context
This super fast rectifier uses a glass-passivated silicon junction optimized for high-efficiency switching-mode power conversion. Its 35 ns reverse recovery time and low 60 pF junction capacitance minimize switching losses and EMI generation during turn-off transitions in 100–500 kHz SMPS topologies.
The device operates across -55°C to +150°C junction temperature range with 4°C/W junction-to-case thermal resistance, enabling stable 8 A continuous conduction in thermally constrained industrial and automotive-grade (AEC-Q101 optional) power stages when mounted to heatsinks per 0.56 N·m torque spec.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - maximum non-repetitive reverse blocking voltage; defines usable input voltage range in boost/flyback designs |
| IF | 8 A - continuous average forward current rating at case temperature ≤ 115°C; sets output power ceiling in rectification stage |
| trr | 35 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient operation up to ~500 kHz switching |
| VF | ≤ 1.300 V @ 8 A, 25°C - low conduction loss improves efficiency vs. standard fast recovery diodes |
| CJ | 60 pF @ 1 MHz, 4 V - reduced capacitive charge minimizes turn-on switching loss and ringing |
| RθJC | 4°C/W - enables direct heatsink mounting without thermal interface pads for compact thermal design |
| IFSM | 125 A @ 8.3 ms half-sine - withstands inrush and transient overloads in offline AC-DC front-ends |
Pinout & Package
Package: ITO-220AC - insulated TO-220 variant with electrically isolated tab, matte tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and 1.70 g mass. Mounting torque ≤ 0.56 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to switching node (e.g., MOSFET drain) in flyback/freewheeling configuration |
| Cathode (Lead 2) | Forward current exit point | Connected to output rail or ground return path; carries full load current continuously |
| Tab (Isolated) | Thermal interface only | Electrically isolated metal surface for heatsink attachment; no electrical connection required |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and moisture resistance in humid or high-bias stress environments |
| Super fast recovery (35 ns) | Reduces reverse recovery charge (Qrr) and associated switching losses in high-frequency converters |
| Low VF (≤1.300 V @ 8 A) | Lowers conduction loss by ~15–20% versus comparable 300 V fast rectifiers, improving thermal margin |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in industrial and consumer power supplies |
| AEC-Q101 qualified option (SFAF805GH) | Supports automotive under-hood applications requiring extended temperature and reliability validation |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated 48 V–300 V input DC-DC converters operating at 100–300 kHz. IC Role / Device Role / Timing Role: Unidirectional current valve conducting during transformer secondary positive half-cycle; blocks reverse voltage during reset phase. Use Value: 35 ns trr and 60 pF CJ reduce switching loss and EMI, enabling higher frequency operation without efficiency penalty. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in H-bridge inverters driving HVAC compressors or industrial actuators. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during PWM off-time, clamping inductive kickback voltage to safe levels. Use Value: 125 A IFSM and 300 V VRRM ensure robustness against load dump transients and inductive energy spikes. |
| AC-DC Front-End Bridge Leg | High-Efficiency Flyback Snubber Clamp |
Use Scenario: Single-diode replacement in discrete bridge rectifier configurations for universal-input (85–265 VAC) offline SMPS with PFC pre-regulator. IC Role / Device Role / Timing Role: Conducts during positive half-cycle of rectified AC line; blocks reverse voltage during negative half-cycle with minimal leakage. Use Value: 10 µA max IR @ 25°C ensures low standby power loss; glass passivation prevents parametric drift in long-life applications. | Use Scenario: Clamp diode in RCD snubber network across flyback transformer primary to absorb leakage inductance energy. IC Role / Device Role / Timing Role: Rapidly conducts clamp current during MOSFET turn-off, then blocks high-voltage spike with minimal stored charge. Use Value: Low Qrr from 35 ns trr reduces snubber dissipation and improves overall converter efficiency by >0.5%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R03DJF | VRRM = 300 V, trr = 30 ns, VF = 1.25 V @ 8 A, same ITO-220AC package | Slightly faster recovery but lower surge rating (100 A vs. 125 A); not AEC-Q101 qualified | Preferred where ultra-low trr dominates over surge margin; verify layout thermal relief for identical footprint |
| ON Semi MUR830 | VRRM = 300 V, trr = 50 ns, VF = 1.35 V @ 8 A, TO-220AC (non-isolated tab) | Slower recovery increases switching loss; tab is electrically connected to cathode - requires insulation if heatsink grounded | Lower-cost alternative where 50 ns trr is acceptable and isolation not required; check creepage/clearance for safety compliance |
Compared with STTH8R03DJF and MUR830, the SFAF805G delivers optimal balance of 35 ns recovery speed, 125 A surge headroom, and electrically isolated tab - making it preferred for thermally dense, high-reliability industrial and automotive-qualified designs where layout flexibility and transient robustness are critical.
Availability
SFAF805G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.
Supply support for SFAF805G 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 power semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS, MOSFETs, and ICs for industrial, computing, and consumer markets.
The SFAF80xG series was developed specifically for high-frequency, high-efficiency power conversion systems demanding low VF, fast trr, and rugged thermal packaging - targeting next-generation SMPS, server PSUs, and EV auxiliary power modules.
FAQ
What is the maximum junction temperature rating for SFAF805G?
The SFAF805G has a maximum junction temperature (TJ) rating of +150°C, with operational storage temperature spanning -55°C to +150°C. This allows reliable use in high-ambient environments such as enclosed industrial enclosures or under-hood automotive locations when properly heatsinked. The SFAF805G maintains specified electrical parameters within this full range, provided case temperature limits are observed per its derating curve.
Does SFAF805G have an AEC-Q101 qualified version?
Yes, the AEC-Q101 qualified version of SFAF805G is designated SFAF805GH. It undergoes additional stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing per AEC-Q101 Rev D. The SFAF805GH shares identical electrical and thermal specifications with SFAF805G but is certified for automotive-grade reliability in powertrain and body electronics applications.
What is the reverse leakage current specification for SFAF805G at elevated temperature?
The SFAF805G specifies a maximum reverse leakage current (IR) of 10 µA at 25°C and rated VR, rising to 400 µA at 100°C. This temperature-dependent behavior is typical for silicon super fast rectifiers and must be accounted for in low-power standby circuits or precision voltage reference paths where microamp-level leakage could affect accuracy or quiescent current.
How does the ITO-220AC package of SFAF805G differ from standard TO-220AC?
The ITO-220AC package used by SFAF805G features an electrically isolated metal tab, unlike standard TO-220AC where the tab connects internally to the cathode. This isolation eliminates need for insulating washers or pads when mounting to grounded heatsinks - simplifying mechanical assembly and improving thermal reliability. The SFAF805G's tab remains at floating potential unless externally bonded, supporting flexible grounding schemes in multi-rail power systems.
What test conditions define the 35 ns reverse recovery time for SFAF805G?
The 35 ns reverse recovery time (trr) for SFAF805G is measured under standardized conditions: forward current IF = 0.5 A, reverse current IR = 1.0 A, reverse recovery current Irr = 0.25 A, and junction temperature TJ = 25°C. These conditions reflect typical light-load switching behavior and correlate directly to Qrr performance in real-world SMPS operation - enabling accurate loss estimation using manufacturer-provided curves.
SFAF805G C0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-2 Full Pack
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ITO-220AC
- Operating Temperature - Junction:
- -55°C ~ 150°C
SFAF805G C0G FAQ
1.How can I place an order for SFAF805G C0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF805G C0G 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 SFAF805G C0G reliable?
The price and inventory of SFAF805G C0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF805G C0G is usually 5 days.
3.What payment methods are accepted for SFAF805G C0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF805G C0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF805G C0G?
SFAF805G C0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF805G C0G 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 SFAF805G C0G?
For technical support, including SFAF805G C0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF805G C0G requirements.
6.How does Aetrix verify that SFAF805G C0G is sourced from the original manufacturer or authorized distributors?
All SFAF805G C0G 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 SFAF805G C0G meets industry standards.
7.What is the process for return or replacement of SFAF805G C0G?
All SFAF805G C0G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF805G C0G, 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 SFAF805G C0G part is unused and in its original packaging.
Return procedure for SFAF805G C0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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