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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SFA808G

Name: SFA808G
Brand: Taiwan Semiconductor Corporation
SKU: SFA808G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFA808G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: SFA808G.pdf

Description:: DIODE GEN PURP 600V 8A TO220AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SFA808G from Taiwan Semiconductor is a single-die, TO-220AC packaged super fast rectifier diode rated for 600 V repetitive peak reverse voltage (V_RRM), 8 A average forward current (I_F), and 125 A non-repetitive surge current (I_FSM), with 1.700 V typical forward voltage at 8 A and 25°C. It serves as a high-efficiency freewheeling or output rectification device in high-voltage DC-DC converters and switching inverters.

For engineers reviewing the SFA808G datasheet, SFA808G pinout, SFA808G application, or SFA808G equivalent, key selection criteria include its 600 V V_RRM, 35 ns reverse recovery time (t_rr), 60 pF junction capacitance at 4 V, 4 °C/W junction-to-case thermal resistance, and AEC-Q101 qualification availability (SFA808GH variant).

Technical Context

The SFA808G is a silicon planar super fast recovery rectifier optimized for high-voltage, medium-current switching applications. Its 35 ns t_rr enables operation in high-frequency SMPS topologies up to several hundred kHz, while its 600 V V_RRM supports primary-side snubber or secondary-side rectification in industrial and automotive 400–600 V bus systems.

Thermally, it delivers 4 °C/W R_θJC in TO-220AC package with matte tin-plated leads compliant to J-STD-002, enabling reliable 8 A continuous conduction at T_C ≤ 100°C. The 1.700 V V_F at 8 A/25°C reflects trade-off between speed and conduction loss in the 600 V class.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Supports rectification in 400–600 V DC bus systems without derating
I_F	8 A - Continuous average forward current rating at T_C = 100°C
I_FSM	125 A - Withstands single half-sine surge (8.3 ms) during power-up or fault events
t_rr	35 ns - Enables efficient operation in >200 kHz switching converters with low switching loss
V_F	1.700 V @ 8 A, 25°C - Confirmed forward drop impacting conduction loss and thermal design
C_J	60 pF @ 1 MHz, 4 V - Low junction capacitance reduces capacitive switching loss and EMI
R_θJC	4 °C/W - Enables direct heatsink mounting for thermally constrained PCB layouts

Pinout & Package

TO-220AC package: 3-lead, single-diode configuration with anode (pin 1), cathode (pin 2), and electrically connected tab (pin 3, cathode). Mounting torque ≤ 0.56 N·m; matte tin-plated leads; polarity marked on case.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Lead)	Anode	Input terminal for forward conduction; connects to source of energy (e.g., transformer secondary or switch node)
Pin 2 (Lead)	Cathode	Output terminal for forward conduction; connects to load or filter capacitor
Tab (Metal Surface)	Cathode	Electrically tied to pin 2; provides thermal path to heatsink and must be isolated if cathode is not chassis-ground referenced

Key Features

Feature	Design Value
Super fast recovery	35 ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching losses in hard-switched topologies
High-voltage capability	600 V V_RRM allows use in 400 V+ DC link applications without series stacking
Low junction capacitance	60 pF reduces displacement current and EMI generation during voltage transitions
AEC-Q101 qualified option	SFA808GH variant meets stress-test requirements for automotive under-hood power electronics
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally regulated end equipment

Applications

Industrial DC-DC Converters	Automotive Onboard Chargers (OBC)
Use Scenario: High-efficiency 400–600 V input DC-DC stage converting battery or grid-derived DC to 12/48 V for auxiliary systems. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asymmetrical half-bridge topology. Use Value: 35 ns t_rr and 600 V rating enable high-frequency operation with reduced snubber loss and compact magnetics.	Use Scenario: Secondary-side rectification in bidirectional OBC AC/DC and DC/DC stages operating at 400–800 V DC bus. IC Role / Device Role / Timing Role: Freewheeling diode in active clamp or LLC resonant converter output stage. Use Value: 125 A I_FSM withstands inrush during soft-start; AEC-Q101-qualified variant supports automotive qualification.
Renewable Energy Inverters	Server & Telecom Power Supplies
Use Scenario: DC link clamping and freewheeling in string inverters interfacing PV arrays with 600–1000 V open-circuit voltage. IC Role / Device Role / Timing Role: Snubber diode across IGBTs or SiC MOSFETs in three-phase bridge legs. Use Value: 600 V V_RRM matches system DC bus; 4 °C/W R_θJC supports forced-air-cooled thermal management.	Use Scenario: OR-ing and hold-up rectification in redundant 48 V intermediate bus architectures. IC Role / Device Role / Timing Role: High-reliability freewheeling diode in active OR-ing controllers or backup power paths. Use Value: 1.700 V V_F balances conduction loss vs. thermal margin; RoHS/halogen-free compliance meets datacenter environmental specs.

Industrial DC-DC Converters

Automotive Onboard Chargers (OBC)

Use Scenario: High-efficiency 400–600 V input DC-DC stage converting battery or grid-derived DC to 12/48 V for auxiliary systems.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or asymmetrical half-bridge topology.

Use Value: 35 ns t_rr and 600 V rating enable high-frequency operation with reduced snubber loss and compact magnetics.

Use Scenario: Secondary-side rectification in bidirectional OBC AC/DC and DC/DC stages operating at 400–800 V DC bus.

IC Role / Device Role / Timing Role: Freewheeling diode in active clamp or LLC resonant converter output stage.

Use Value: 125 A I_FSM withstands inrush during soft-start; AEC-Q101-qualified variant supports automotive qualification.

Renewable Energy Inverters

Server & Telecom Power Supplies

Use Scenario: DC link clamping and freewheeling in string inverters interfacing PV arrays with 600–1000 V open-circuit voltage.

IC Role / Device Role / Timing Role: Snubber diode across IGBTs or SiC MOSFETs in three-phase bridge legs.

Use Value: 600 V V_RRM matches system DC bus; 4 °C/W R_θJC supports forced-air-cooled thermal management.

Use Scenario: OR-ing and hold-up rectification in redundant 48 V intermediate bus architectures.

IC Role / Device Role / Timing Role: High-reliability freewheeling diode in active OR-ing controllers or backup power paths.

Use Value: 1.700 V V_F balances conduction loss vs. thermal margin; RoHS/halogen-free compliance meets datacenter environmental specs.

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 V_RRM, 8 A I_F, 30 ns t_rr, TO-220AC, VF = 1.75 V @ 8 A	Marginally faster t_rr but higher V_F; no AEC-Q101 option	Preferred where ultra-low Q_rr outweighs conduction loss; not suitable for automotive qualification
VS-8EWH06FN-M3	600 V V_RRM, 8 A I_F, 35 ns t_rr, TO-220AC, VF = 1.65 V @ 8 A, AEC-Q101 qualified	Lower V_F and same t_rr; identical qualification status	Drop-in alternative when lower conduction loss is critical; requires verification of lead finish compatibility

Compared with STTH8R06DJF and VS-8EWH06FN-M3, the SFA808G offers balanced speed-loss trade-off and optional AEC-Q101 qualification, making it suitable for cost-sensitive industrial and automotive-qualified designs where 1.700 V V_F and 35 ns t_rr meet system efficiency targets.

Availability

SFA808G is available at Aetrix Electronics and suitable for industrial DC-DC converters, automotive onboard chargers, and renewable energy inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SFA808G 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, specializing in power devices, rectifiers, and protection components.

The SFA808G belongs to TSC's Super Fast Rectifier family, designed specifically for high-voltage, medium-current switching power supplies demanding low recovery time, robust surge capability, and industrial-grade reliability.

FAQ

What is the maximum junction temperature rating for the SFA808G?

The SFA808G has a maximum junction temperature (T_J) rating of +150°C, with a storage temperature range of –55°C to +150°C. This allows operation in high-ambient environments such as engine compartments or enclosed power enclosures, provided thermal design maintains T_J ≤ 150°C under worst-case I_F and switching conditions. The SFA808G datasheet specifies derating curves for I_F versus case temperature.

Is the SFA808G pin-compatible with other parts in the SFA80xG series?

Yes, all SFA80xG devices-including SFA808G-share identical TO-220AC package dimensions, pinout (anode–cathode–tab), and mechanical footprint. Voltage ratings differ only in internal die design; external layout and mounting remain unchanged across the series, enabling voltage-scaling design reuse.

Does the SFA808G have AEC-Q101 qualification?

The base SFA808G is not AEC-Q101 qualified; however, the SFA808GH variant is explicitly qualified per AEC-Q101. The "H" suffix denotes automotive-grade screening and testing. Designers requiring automotive compliance must specify SFA808GH-not SFA808G-to ensure qualification coverage.

What is the reverse recovery time (t_rr) test condition for the SFA808G?

The SFA808G reverse recovery time is specified as 35 ns under the condition: I_F = 0.5 A, I_R = 1.0 A, I_RR = 0.25 A, measured using the standard test circuit in Figure 6 of the datasheet. This reflects performance in realistic switching transitions, not idealized small-signal conditions.

How does the junction capacitance of the SFA808G compare to lower-voltage variants in the same family?

The SFA808G exhibits 60 pF junction capacitance at 1 MHz and 4 V reverse bias-lower than the 100 pF of SFA801G–SFA804G variants. This reduction results from higher-voltage die construction (thicker depletion region), directly lowering displacement current and improving high-frequency EMI behavior in 600 V applications.

SFA808G 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):: 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:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AC

Operating Temperature - Junction:: -55°C ~ 150°C

SFA808G FAQ

1.How can I place an order for SFA808G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFA808G 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 SFA808G reliable?

The price and inventory of SFA808G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFA808G is usually 5 days.

3.What payment methods are accepted for SFA808G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFA808G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFA808G?

SFA808G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFA808G 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 SFA808G?

For technical support, including SFA808G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFA808G requirements.

6.How does Aetrix verify that SFA808G is sourced from the original manufacturer or authorized distributors?

All SFA808G 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 SFA808G meets industry standards.

7.What is the process for return or replacement of SFA808G?

All SFA808G units undergo pre-shipment inspection (PSI). If there is an issue with SFA808G, 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 SFA808G part is unused and in its original packaging.

Return procedure for SFA808G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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