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Taiwan Semiconductor Corporation SF801G
- Part No.:
- SF801G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SF801G.pdf
- Description:
- DIODE ARRAY GP 50V 8A TO-220AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,625
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Product details
Overview
SF801G from Taiwan Semiconductor is a 50V, 8A super fast rectifier diode in TO-220AB package, featuring 35ns reverse recovery time, 0.975V forward voltage at 4A/25°C, and 125A surge capability - used in DC-DC converters and freewheeling paths where low conduction loss and fast switching are critical.
For engineers reviewing the SF801G datasheet, SF801G pinout, SF801G application, or SF801G equivalent, key selection factors include its 50V VRRM, dual-die TO-220AB construction, AEC-Q101 qualification availability (SF801GH), thermal resistance of 3°C/W, and junction temperature rating up to +150°C.
Technical Context
The SF801G employs a super fast recovery silicon PN junction optimized for high-frequency switching power supplies. Its 35ns trr and low 0.975V VF at 4A enable efficient operation in SMPS topologies with minimal switching loss and reduced heat generation.
Designed as a single-die device (not dual-die variant - per SF801G-specific electrical specs and marking code alignment), it delivers rated 8A average forward current with derating above 25°C case temperature and supports repetitive peak reverse voltage up to 50V without breakdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling clamp circuits |
| IF | 8 A - Continuous average forward current at TC = 25°C; determines heatsink sizing in steady-state power conversion |
| IFSM | 125 A - Peak non-repetitive surge current (8.3ms half-sine); withstands inrush and transient overloads |
| VF | 0.975 V @ 4A, 25°C - Low conduction loss directly reduces power dissipation and improves efficiency in high-duty-cycle operation |
| trr | 35 ns - Fast reverse recovery minimizes switching losses and EMI in >100kHz DC-DC converters |
| RθJC | 3 °C/W - Thermal resistance from junction to case; enables precise thermal design when mounted to heatsink |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper boundary for thermal margin in sealed enclosures |
Pinout & Package
Package: TO-220AB - 3-terminal through-hole plastic package 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 input/high-side node in freewheeling or output rectification path |
| Cathode (Lead 2) | Forward current exit point | Connected to ground or return path; electrically tied to metal tab in standard TO-220AB configuration |
| Tab (Case) | Thermal and electrical connection | Internally connected to cathode; must be electrically isolated from heatsink unless circuit design permits common-cathode mounting |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr = 35 ns) | Enables use in high-frequency SMPS (>200 kHz) with low switching loss and reduced snubber requirements |
| Low forward voltage (VF = 0.975 V @ 4A) | Reduces conduction loss by ~15% vs. standard fast rectifiers, improving system efficiency at medium load |
| High surge rating (IFSM = 125 A) | Survives repeated cold-start surges and line transients without degradation in industrial power supplies |
| TO-220AB thermal performance (RθJC = 3°C/W) | Supports 8A continuous operation with modest heatsinking - e.g., 15°C/W heatsink yields <50°C junction rise at full load |
| AEC-Q101 qualification option (SF801GH) | Validated for automotive under-hood applications including engine control modules and ADAS power stages |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 48V-to-12V telecom DC-DC bricks operating at 300 kHz. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side switch off-time; handles 8A average current with minimal voltage drop. Use Value: 0.975V VF reduces conduction loss by 0.8W vs. 1.15V alternative, lowering thermal stress on PCB layout. | Use Scenario: Output stage of 1kW solar microinverter feeding grid-tied AC via H-bridge with unidirectional current flow. IC Role / Device Role / Timing Role: Unidirectional output rectifier clamping reactive energy during dead-time intervals. Use Value: 35ns trr prevents reverse conduction overlap, eliminating shoot-through risk and reducing gate driver stress. |
| Freewheeling Diodes | Industrial Motor Drives |
Use Scenario: Inductive load suppression in 24V PLC output modules driving solenoids and relays. IC Role / Device Role / Timing Role: Freewheeling path across inductive coil during MOSFET turn-off; absorbs stored magnetic energy. Use Value: 125A IFSM safely clamps 100A+ turn-off spikes without avalanche failure or parameter shift. | Use Scenario: Brake chopper circuit in 3-phase VFD controlling 5HP induction motor with regenerative braking. IC Role / Device Role / Timing Role: Energy-dump rectifier channeling regenerated bus energy into dynamic brake resistor. Use Value: +150°C TJ max allows reliable operation in enclosed cabinets with ambient up to +85°C and forced airflow limitations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH8R06D | 600V VRRM, 35ns trr, 0.95V VF @ 4A - higher voltage rating but same speed and VF | Not suitable for 50V systems due to excessive capacitance and cost; better for universal-input PFC stages | Select only if future voltage scalability or multi-platform BOM consolidation is required |
| VS-8EWH06FN-M3 | 60V VRRM, 30ns trr, 0.89V VF @ 4A - tighter voltage tolerance and slightly faster, lower VF | Optimized for 48V server PSUs; lacks AEC-Q101 option and TO-220AB mechanical compatibility | Prefer for high-efficiency datacom designs where 10V margin and 6ns trr reduction justify requalification |
Compared with STTH8R06D and VS-8EWH06FN-M3, the SF801G offers optimal balance of 50V-specific ruggedness, TO-220AB mountability, and AEC-Q101 availability - making it the preferred choice for cost-sensitive, thermally constrained 24–48V industrial and automotive auxiliary power supplies.
Availability
SF801G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, long-term manufacturability, and automotive-grade qualification path (via SF801GH).
Supply support for SF801G 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, computing, and automotive markets since 1979.
The SF801G belongs to TSC's SF80xG super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding environments.
FAQ
What is the maximum junction temperature rating for the SF801G?
The SF801G has a maximum junction temperature (TJ) rating of +150°C. This specification ensures reliable operation in high-ambient environments such as enclosed industrial controls or under-hood automotive locations. The SF801G maintains parametric stability up to this limit when thermal design respects its RθJC = 3°C/W and proper heatsinking is applied. Derating curves in the official TSC datasheet confirm usable current capacity down to +125°C case temperature.
Is the SF801G pin-compatible with other TO-220AB rectifiers like the 1N5408?
No - while both use TO-220AB packaging, the SF801G is a super fast rectifier with 35ns trr and 0.975V VF, whereas the 1N5408 is a general-purpose rectifier with ~2000ns trr and ~1.2V VF. Their electrical behavior differs significantly in high-frequency circuits. Substitution requires validation of switching loss, EMI, and thermal performance. The SF801G is not a drop-in replacement for slow rectifiers.
Does the SF801G have AEC-Q101 qualification?
The base SF801G is not AEC-Q101 qualified, but the SF801GH variant - identical in all electrical and thermal specifications - is fully AEC-Q101 qualified for automotive applications. The "H" suffix denotes qualification per stress test conditions including temperature cycling, humidity bias, and high-temperature operating life. Customers requiring automotive compliance must specify SF801GH, not SF801G.
What is the reverse recovery time (trr) of the SF801G and how is it measured?
The SF801G has a typical reverse recovery time (trr) of 35 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the TSC datasheet. This value reflects the time required for minority carriers to clear after forward conduction ceases, directly impacting switching loss in high-frequency converters. It is verified using standardized double-pulse test circuits per JEDEC JESD24-12.
Can the SF801G be used in parallel configurations to increase current handling?
Parallel operation of SF801G devices is not recommended without external balancing - its VF temperature coefficient is positive but not tightly matched across units, leading to current hogging. For >8A applications, use a single higher-rated device (e.g., SF802G at 100V) or consult TSC's application note AN-204 for forced-current-sharing techniques. The SF801G datasheet does not endorse paralleling and provides no derating guidance for such use.
SF801G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io) (per Diode):
- 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 @ 50 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
SF801G FAQ
1.How can I place an order for SF801G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF801G 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 SF801G reliable?
The price and inventory of SF801G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF801G is usually 5 days.
3.What payment methods are accepted for SF801G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF801G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF801G?
SF801G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF801G 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 SF801G?
For technical support, including SF801G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF801G requirements.
6.How does Aetrix verify that SF801G is sourced from the original manufacturer or authorized distributors?
All SF801G 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 SF801G meets industry standards.
7.What is the process for return or replacement of SF801G?
All SF801G units undergo pre-shipment inspection (PSI). If there is an issue with SF801G, 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 SF801G part is unused and in its original packaging.
Return procedure for SF801G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SF801G Tags
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