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Taiwan Semiconductor Corporation SF808G
- Part No.:
- SF808G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-220-3
- Datasheet:
-
SF808G.pdf
- Description:
- DIODE GEN PURP 600V 8A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SF808G from Taiwan Semiconductor is a 600V, 8A super fast rectifier diode in TO-220AB package, featuring 1.700 V forward voltage at 4A and 25°C, 35 ns reverse recovery time, and dual-die construction for high surge capability - deployed in high-frequency DC/DC converters and freewheeling paths in automotive-grade power supplies.
For engineers reviewing the SF808G datasheet, SF808G pinout, SF808G application, or SF808G equivalent, key selection criteria include peak reverse voltage (600 V), thermal resistance (3 °C/W), junction temperature range (−55 to +150 °C), AEC-Q101 qualification status, and TO-220AB mechanical compatibility with heatsink mounting.
Technical Context
The SF808G implements a super fast recovery silicon PN junction optimized for switching-mode power conversion above 50 kHz. Its 35 ns trr and low 50 pF junction capacitance per diode minimize switching losses and EMI generation during hard commutation.
Rated for 125 A non-repetitive surge current (8.3 ms half-sine), the device supports robust operation under transient overload conditions. Dual-die configuration enables balanced current sharing and improved thermal distribution across the TO-220AB case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - maximum repetitive reverse blocking voltage; defines safe operating limit in high-voltage DC bus applications |
| IF | 8 A - continuous average forward current; determines steady-state power handling without derating at TC = 100 °C |
| IFSM | 125 A - peak non-repetitive surge current; supports inrush and fault-current tolerance in SMPS primary-side rectification |
| VF | 1.700 V @ 4 A, 25 °C - forward voltage drop per diode; directly impacts conduction loss and thermal design margin |
| trr | 35 ns - reverse recovery time; critical for minimizing switching loss and cross-conduction risk in synchronous/freewheeling topologies |
| RθJC | 3 °C/W - junction-to-case thermal resistance; enables accurate heatsink sizing for 8 A continuous operation |
| Junction temp | −55 to +150 °C - operational temperature range; supports under-hood automotive and industrial ambient environments |
Pinout & Package
TO-220AB package with three terminals: Anode (pin 1), Cathode (pin 2), and Case (pin 3, electrically connected to cathode). Mounting tab is cathode-connected and designed for direct heatsink attachment with ≤0.56 N·m torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Lead 1) | Anode | Input terminal for forward conduction; connects to high-side switch node or transformer secondary |
| Pin 2 (Lead 2) | Cathode | Output terminal for forward conduction; ties to output rail or ground return path |
| Pin 3 (Tab) | Cathode (common) | Electrically bonded to pin 2; provides low-inductance thermal path to heatsink and must be isolated if floating cathode required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option (SF808GH) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, HTRB |
| Super fast recovery (35 ns) | Enables >100 kHz switching frequencies with minimal reverse recovery loss and reduced snubber demands |
| Dual-die construction | Improves current sharing uniformity and thermal reliability versus single-die equivalents at 8 A rating |
| Low CJ (50 pF) | Reduces capacitive coupling and displacement current during dv/dt transitions, lowering EMI in compact layouts |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained production |
Applications
| Automotive DC/DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: High-efficiency 12 V to 48 V bidirectional DC/DC converter in 48 V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Primary-side super fast rectifier in synchronous buck-boost topology, handling 8 A continuous output current. Use Value: 600 V VRRM accommodates voltage spikes from motor regeneration; 35 ns trr minimizes switching loss at 200 kHz operation. | Use Scenario: Output stage rectification in 3 kW industrial servo drive inverters. IC Role / Device Role / Timing Role: Freewheeling diode across IGBTs in H-bridge output stage, clamping inductive kickback. Use Value: 125 A IFSM withstands motor stall surges; TO-220AB tab enables direct heatsink mounting for thermal stability. |
| Telecom Power Supplies | Renewable Energy Charge Controllers |
Use Scenario: Secondary-side rectification in 48 V telecom rectifier modules with forced-air cooling. IC Role / Device Role / Timing Role: Output rectifier in phase-shifted full-bridge topology delivering up to 50 A aggregate current. Use Value: 1.700 V VF reduces conduction loss at partial load; RθJC = 3 °C/W allows predictable thermal design. | Use Scenario: MPPT charge controller for 24 V battery banks fed by 100–200 V PV arrays. IC Role / Device Role / Timing Role: Blocking diode between PV input and battery bus to prevent reverse discharge at night. Use Value: 600 V VRRM safely isolates open-circuit PV voltage; <10 µA IR at 25 °C minimizes standby leakage loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06DJF | 600 V, 8 A, 35 ns trr, TO-220AC package (single cathode lead), RθJC = 3.5 °C/W | No AEC-Q101 variant available; lower surge rating (100 A vs. 125 A) | Preferred where AEC-Q101 compliance is not required and layout allows TO-220AC footprint |
| VS-8EWH06FN-M3 | 600 V, 8 A, 30 ns trr, TO-220AC, VF = 1.65 V @ 4 A, RθJC = 3.2 °C/W, AEC-Q101 qualified | Lower trr improves light-load efficiency but higher cost; same mounting torque spec | Best for high-frequency (>300 kHz) designs requiring tighter recovery control and automotive qualification |
Compared with STTH8R06DJF and VS-8EWH06FN-M3, the SF808G offers superior surge robustness (125 A) and lower thermal resistance (3 °C/W), making it optimal for thermally constrained or high-transient industrial and automotive applications where AEC-Q101 is optional or fulfilled via SF808GH.
Availability
SF808G is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switch-mode inverters, and renewable energy charge controllers requiring stable component supply with long-term lifecycle support.
Supply support for SF808G 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, automotive, and consumer markets since 1979.
The SF808G belongs to TSC's SF-series super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial environments where fast recovery, surge resilience, and thermal performance are critical.
FAQ
What is the maximum junction temperature rating for the SF808G?
The SF808G has a maximum junction temperature (TJ) of +150 °C and a minimum of −55 °C. This wide operating range supports deployment in under-hood automotive locations and high-ambient industrial enclosures. The SF808G must be mounted to a heatsink with appropriate thermal interface material to maintain TJ ≤ 150 °C under full 8 A load conditions.
Is the SF808G pin-compatible with other devices in the SF80xG series?
Yes, all SF801G through SF808G share identical TO-220AB packaging, pinout (anode–cathode–tab), and mechanical dimensions. Voltage ratings differ only in internal die design - VRRM scales from 50 V to 600 V - so SF808G can replace lower-voltage variants in high-voltage designs without PCB changes, provided thermal and electrical margins are verified.
Does the SF808G have AEC-Q101 qualification?
The base SF808G is not AEC-Q101 qualified, but the SF808GH variant is explicitly qualified per AEC-Q101 Rev D. Both share identical electrical specs and TO-220AB packaging; the "H" suffix denotes qualification testing including HTOL, temperature cycling, and HTRB. For automotive applications, specify SF808GH to ensure compliance.
What is the forward voltage drop of the SF808G at rated current?
The SF808G exhibits a typical forward voltage (VF) of 1.700 V at 4 A and 25 °C, measured per diode. At full 8 A average current and elevated junction temperature (125 °C), VF increases to approximately 1.85 V. This value directly determines conduction loss and must be included in thermal modeling for the SF808G.
How does the SF808G's reverse recovery time compare to standard fast rectifiers?
The SF808G achieves a reverse recovery time (trr) of 35 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions - significantly faster than standard fast rectifiers (typically 100–500 ns). This enables efficient operation in high-frequency SMPS designs and reduces switching losses and EMI compared to slower alternatives like UF808G or BYV26E.
SF808G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 8 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 600 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF808G FAQ
1.How can I place an order for SF808G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF808G 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 SF808G reliable?
The price and inventory of SF808G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF808G is usually 5 days.
3.What payment methods are accepted for SF808G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF808G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF808G?
SF808G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF808G 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 SF808G?
For technical support, including SF808G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF808G requirements.
6.How does Aetrix verify that SF808G is sourced from the original manufacturer or authorized distributors?
All SF808G 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 SF808G meets industry standards.
7.What is the process for return or replacement of SF808G?
All SF808G units undergo pre-shipment inspection (PSI). If there is an issue with SF808G, 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 SF808G part is unused and in its original packaging.
Return procedure for SF808G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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