My Inquiry
My Account
Taiwan Semiconductor Corporation SFAF806G
- Part No.:
- SFAF806G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-2 Full Pack
- Datasheet:
-
SFAF806G.pdf
- Description:
- DIODE GEN PURP 400V 8A ITO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SFAF806G from Taiwan Semiconductor is an 8A, 400V repetitive peak reverse voltage (VRRM) super fast rectifier diode in ITO-220AC package, featuring 1.300 V forward voltage at 8A/25°C, 35 ns reverse recovery time, and AEC-Q101 qualification option; used in switching-mode DC-DC converters requiring high surge capability and low conduction loss.
For engineers reviewing the SFAF806G datasheet, SFAF806G pinout, SFAF806G application, or SFAF806G equivalent, key selection criteria include verified VRRM = 400 V, IF = 8 A continuous rating, trr = 35 ns, RθJC = 4 °C/W thermal resistance, and ITO-220AC mechanical compatibility with heatsink mounting.
Technical Context
The SFAF806G is a single-die, glass-passivated silicon super fast recovery rectifier optimized for high-frequency switching applications. Its 400 V VRRM, 125 A IFSM (8.3 ms half-sine), and 35 ns trr enable efficient freewheeling and output rectification in compact SMPS designs.
Thermally, it delivers 4 °C/W junction-to-case resistance and operates across –55°C to +150°C junction temperature range. The device meets UL 94V-0 flammability, JESD201 Class 2 whisker resistance, and RoHS/halogen-free compliance per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling circuits |
| IF | 8 A - continuous average forward current at case temperature ≤ 100°C; determines heatsink sizing baseline |
| IFSM | 125 A - peak non-repetitive surge current (8.3 ms); supports inrush and transient overload tolerance |
| VF | 1.300 V @ 8 A, 25°C - forward conduction loss directly impacts efficiency and thermal rise in high-duty-cycle operation |
| trr | 35 ns - reverse recovery time; enables stable operation up to ~3 MHz switching frequencies with minimal switching loss |
| RθJC | 4 °C/W - thermal resistance from junction to case; enables direct calculation of junction temperature rise under known power dissipation |
| CJ | 60 pF @ 1 MHz, 4 V - junction capacitance affects EMI generation and snubber design in high-dv/dt environments |
Pinout & Package
Package: ITO-220AC - insulated through-hole outline with single anode/cathode terminals, matte tin-plated leads (J-STD-002 solderable), UL 94V-0 molding compound, and 0.56 N·m max mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); polarity marked on case |
| Cathode (Lead 2) | Forward current exit point | Connected to higher-potential node (e.g., output rail); electrically tied to metal tab for thermal path |
| Metal Tab | Case / Cathode connection | Internally bonded to cathode; serves as primary thermal interface to heatsink; must be electrically isolated if cathode is not ground-referenced |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and moisture resistance without requiring hermetic sealing |
| AEC-Q101 qualified version available (SFAF806GH) | Validated for automotive under-hood applications including engine control and ADAS power stages |
| UL Recognized (E-326243) | Meets safety requirements for end-equipment certification in industrial and consumer power supplies |
| Halogen-free construction | Complies with IEC 61249-2-21, supporting environmental compliance and safer thermal decomposition profiles |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for high-reliability industrial deployments |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling |
|---|---|
Use Scenario: High-efficiency 48 V to 12 V isolated DC-DC converter in telecom power shelf. IC Role / Device Role / Timing Role: Primary output rectifier handling 8 A continuous load with 400 V reverse standoff during transformer reset. Use Value: 35 ns trr minimizes switching loss at 500 kHz operation; 1.300 V VF reduces conduction loss vs. standard FRDs. | Use Scenario: Bidirectional motor drive inverter with regenerative braking. IC Role / Device Role / Timing Role: Freewheeling diode across IGBTs to clamp inductive kickback during turn-off. Use Value: 125 A IFSM safely absorbs motor back-EMF surges; 400 V VRRM accommodates bus voltage overshoot. |
| Industrial SMPS Secondary Side | Automotive On-Board Charger (OBC) Stage |
Use Scenario: 24 V industrial power supply with 100–240 V AC input and active PFC front-end. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement in LLC resonant converter. Use Value: Low CJ (60 pF) reduces capacitive coupling noise; 4 °C/W RθJC enables compact heatsinking in enclosed enclosures. | Use Scenario: 6.6 kW OBC AC/DC stage converting grid AC to 400 V DC battery bus. IC Role / Device Role / Timing Role: Boost diode in PFC stage where 400 V reverse rating matches intermediate bus voltage. Use Value: AEC-Q101-qualified variant (SFAF806GH) ensures automotive-grade lifetime and thermal cycling robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R04DJF | VRRM = 400 V, IF = 8 A, trr = 30 ns, TO-220AC package, but no AEC-Q101 option | Lacks automotive qualification; suitable for industrial/commercial only | Preferred when ultra-fast trr (30 ns) is prioritized over automotive compliance |
| ON Semi MUR840E | VRRM = 400 V, IF = 8 A, trr = 50 ns, same ITO-220AC footprint, halogen-free | Slower recovery increases switching loss above 200 kHz; wider VF spread (1.25–1.55 V) | Acceptable where cost sensitivity outweighs efficiency at high frequency |
Compared with STTH8R04DJF and MUR840E, the SFAF806G offers balanced trr (35 ns), tight VF spec (≤1.300 V), and optional AEC-Q101 qualification-making it optimal for thermally constrained, automotive-adjacent, or high-reliability industrial SMPS where both speed and ruggedness matter.
Availability
SFAF806G 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 SFAF806G 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 SFAF806G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power supplies demanding low VF, fast trr, and robust surge immunity in space-constrained layouts.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SFAF806G?
The SFAF806G has a specified VRRM of 400 V, confirmed in the Absolute Maximum Ratings table across all versions of the SFAF801G–SFAF808G family. This value defines the highest reverse voltage the device can block repeatedly without breakdown and is validated per JEDEC test conditions.
Is SFAF806G suitable for automotive applications?
Yes-the SFAF806G is available in an AEC-Q101 qualified version designated SFAF806GH. While the base SFAF806G is not automotive-qualified, the GH suffix indicates full stress testing per AEC-Q101, enabling use in engine control units, body electronics, and ADAS power stages where reliability under thermal cycling and vibration is mandatory.
What is the forward voltage (VF) of SFAF806G at rated current?
The SFAF806G exhibits a maximum forward voltage of 1.300 V at IF = 8 A and TJ = 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal design calculations.
Does SFAF806G have a defined reverse recovery time (trr)?
Yes-the SFAF806G has a maximum reverse recovery time of 35 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is explicitly listed in the Electrical Specifications table and applies to all members of the SFAF805G–SFAF808G subgroup, confirming its suitability for high-frequency switching topologies.
What package type does SFAF806G use, and how is thermal management handled?
SFAF806G uses the ITO-220AC package, with the metal tab internally connected to the cathode and serving as the primary thermal path. Its junction-to-case thermal resistance is 4 °C/W, enabling direct heatsink mounting. Mounting torque must not exceed 0.56 N·m to avoid mechanical damage while ensuring optimal thermal contact.
SFAF806G 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):
- 400 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 @ 400 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
SFAF806G FAQ
1.How can I place an order for SFAF806G through Aetrix?
Please submit a Request for Quotation (RFQ) for SFAF806G 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 SFAF806G reliable?
The price and inventory of SFAF806G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFAF806G is usually 5 days.
3.What payment methods are accepted for SFAF806G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFAF806G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SFAF806G?
SFAF806G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SFAF806G 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 SFAF806G?
For technical support, including SFAF806G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFAF806G requirements.
6.How does Aetrix verify that SFAF806G is sourced from the original manufacturer or authorized distributors?
All SFAF806G 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 SFAF806G meets industry standards.
7.What is the process for return or replacement of SFAF806G?
All SFAF806G units undergo pre-shipment inspection (PSI). If there is an issue with SFAF806G, 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 SFAF806G part is unused and in its original packaging.
Return procedure for SFAF806G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SFAF806G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
