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

Taiwan Semiconductor Corporation SF2L6G

Name: SF2L6G
Brand: Taiwan Semiconductor Corporation
SKU: SF2L6G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF2L6G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SF2L6G.pdf

Description:: DIODE GEN PURP 400V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,499

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Product details

Overview

SF2L6G from Taiwan Semiconductor is a 2A, 400V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 1.30V max forward voltage at 2A/25°C, 35ns reverse recovery time, 50A surge capability, and AEC-Q101 qualification option. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SF2L6G datasheet, SF2L6G pinout, SF2L6G application, or SF2L6G equivalent, key selection criteria include repetitive peak reverse voltage (400V), forward voltage drop under load, thermal resistance (R_θJL = 17°C/W), and automotive-grade reliability validation where required.

Technical Context

This single-die silicon rectifier uses glass-passivated junction technology to achieve fast recovery (t_rr ≤ 35 ns) with low conduction loss. Its 400V V_RRM rating and 50A I_FSM support robust operation in 8.3ms surge conditions typical of SMPS output stages.

The device operates across –55°C to +150°C junction temperature range and exhibits 20pF junction capacitance at 1MHz/4V, enabling stable high-frequency rectification without excessive capacitive loading on switching nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse blocking voltage; defines safe DC or peak AC voltage limit before breakdown
I_F	2 A - Continuous average forward current rating at case temperature ≤ 75°C; sets steady-state power delivery capacity
V_F (max)	1.30 V @ 2A, 25°C - Forward voltage drop directly determines conduction loss (P_cond ≈ I_F × V_F)
t_rr	35 ns - Reverse recovery time governs switching loss and EMI generation in hard-switched topologies
I_FSM	50 A - Non-repetitive surge current handling for line transients or startup inrush
R_θJL	17 °C/W - Junction-to-lead thermal resistance enables direct heatsinking via PCB copper or lead frame
C_J	20 pF @ 1 MHz, 4 V - Low junction capacitance minimizes displacement current and improves high-frequency efficiency

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, glass-passivated silicon die, cathode indicated by band. Lead finish: pure tin, J-STD-002 solderable.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to output rail or positive bus; blocks up to 400V reverse voltage

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35 ns)	Reduces switching losses and EMI in 100 kHz–1 MHz SMPS designs
Low V_F (1.30 V max @ 2A)	Minimizes conduction loss and thermal stress in compact, unheatsinked layouts
AEC-Q101 qualified version available	Validated for automotive under-hood applications requiring extended temperature and reliability compliance
Glass-passivated junction	Enhances moisture resistance and long-term stability in humid or industrial environments
RoHS & halogen-free	Meets IEC 61249-2-21 and global environmental compliance mandates for end-product certification

Applications

DC–DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 5–24 V at up to 2 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 35 ns t_rr and 1.30 V V_F jointly reduce total power loss versus standard fast rectifiers, improving efficiency by ~0.8% at full load.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during switch off-time, clamping inductive kickback. Use Value: 50 A I_FSM withstands repetitive inductive surges; 400 V V_RRM supports 24–48 V bus systems with safety margin.
Automotive LED Driver Supply	Industrial AC–DC Adapter Secondary Rectification
Use Scenario: Output rectification in AEC-Q101-compliant LED driver modules for exterior lighting (headlamps, DRLs). IC Role / Device Role / Timing Role: High-reliability rectifier ensuring stable DC output under wide ambient temperature (–40°C to +125°C). Use Value: AEC-Q101 qualification and 150°C T_JMAX enable operation in thermally constrained headlamp housings without derating.	Use Scenario: Secondary-side rectification in universal-input (85–265 VAC), 12–24 V/2 A open-frame AC–DC adapters for industrial control panels. IC Role / Device Role / Timing Role: Primary power conversion element defining efficiency, thermal profile, and no-load input power. Use Value: 17°C/W R_θJL allows direct PCB copper pour heatsinking-eliminating need for discrete heatsinks in space-constrained enclosures.

DC–DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 5–24 V at up to 2 A.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 35 ns t_rr and 1.30 V V_F jointly reduce total power loss versus standard fast rectifiers, improving efficiency by ~0.8% at full load.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters operating at 20–100 kHz.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during switch off-time, clamping inductive kickback.

Use Value: 50 A I_FSM withstands repetitive inductive surges; 400 V V_RRM supports 24–48 V bus systems with safety margin.

Automotive LED Driver Supply

Industrial AC–DC Adapter Secondary Rectification

Use Scenario: Output rectification in AEC-Q101-compliant LED driver modules for exterior lighting (headlamps, DRLs).

IC Role / Device Role / Timing Role: High-reliability rectifier ensuring stable DC output under wide ambient temperature (–40°C to +125°C).

Use Value: AEC-Q101 qualification and 150°C T_JMAX enable operation in thermally constrained headlamp housings without derating.

Use Scenario: Secondary-side rectification in universal-input (85–265 VAC), 12–24 V/2 A open-frame AC–DC adapters for industrial control panels.

IC Role / Device Role / Timing Role: Primary power conversion element defining efficiency, thermal profile, and no-load input power.

Use Value: 17°C/W R_θJL allows direct PCB copper pour heatsinking-eliminating need for discrete heatsinks in space-constrained enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R06	Same 2A/600V rating but higher V_F (1.7 V typ), slower t_rr (50 ns), TO-220AC package	Requires heatsink mounting; not suitable for DO-15 footprint replacement	Select when higher V_RRM margin is critical and board space allows TO-220 layout
ES2D	2A/200V, lower V_F (0.95 V), faster t_rr (30 ns), same DO-15 package	Limited to ≤200 V circuits; unsuitable for 400 V bus applications	Choose only if system V_R stays below 140 V RMS and lowest conduction loss is prioritized

Compared with STTH2R06 and ES2D, the SF2L6G uniquely balances 400 V blocking, DO-15 compatibility, and 1.30 V/35 ns performance-making it optimal for cost-sensitive, space-constrained 24–48 V industrial and automotive SMPS where thermal and EMI constraints exclude higher-V_F or larger-package alternatives.

Availability

SF2L6G is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and automotive LED driver supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SF2L6G 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 SF2L6G belongs to TSC's SF2LxG super fast rectifier family, engineered specifically for high-efficiency, high-reliability secondary-side rectification and freewheeling in compact, high-frequency power conversion systems.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF2L6G?

The SF2L6G has a specified V_RRM of 400 V, meaning it can reliably block up to 400 V of repetitive reverse voltage without breakdown. This rating is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2105), and distinguishes SF2L6G from SF2L4G (200 V) and SF2L8G (600 V) in the same family. Designers must ensure circuit peak reverse voltage remains below this limit with appropriate safety margin.

Is SF2L6G pin-compatible with other devices in the SF2LxG series?

Yes, all SF2LxG devices-including SF2L6G-share identical DO-204AC (DO-15) packaging, axial lead configuration, and cathode-band polarity marking. The anode and cathode terminals are physically and functionally interchangeable across the series, enabling voltage-rating upgrades (e.g., from SF2L4G to SF2L6G) without PCB layout changes, provided thermal and electrical margins remain acceptable.

Does SF2L6G meet automotive qualification standards?

The base SF2L6G is not AEC-Q101 qualified; however, the variant SF2L6GH (with 'H' suffix) is explicitly qualified per AEC-Q101. Per Taiwan Semiconductor's ordering information, 'H' denotes AEC-Q101 compliance, including stress testing for temperature cycling, humidity, and mechanical shock. For automotive applications, specify SF2L6GH-not SF2L6G-to ensure qualification coverage.

What is the typical junction capacitance (C_J) of SF2L6G and why does it matter?

The SF2L6G exhibits a typical junction capacitance of 20 pF measured at 1 MHz and 4 V reverse bias. This low C_J reduces displacement current during switching transitions, lowering EMI generation and minimizing capacitive loading on high-speed switching nodes-critical for maintaining efficiency and signal integrity in 100+ kHz SMPS designs where the SF2L6G is commonly deployed.

How does the forward voltage (V_F) of SF2L6G compare to SF2L4G and SF2L8G?

Per the Electrical Specifications table, SF2L6G has a maximum V_F of 1.30 V at 2 A and 25°C-higher than SF2L4G (0.95 V) but lower than SF2L8G (1.70 V). This reflects the inherent trade-off between reverse voltage capability and conduction loss in silicon rectifiers. The SF2L6G thus delivers optimal V_F/V_RRM balance for 400 V-class applications, making it more efficient than SF2L8G while offering greater voltage margin than SF2L4G.

SF2L6G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 1 µA @ 400 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

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

SF2L6G FAQ

1.How can I place an order for SF2L6G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF2L6G 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 SF2L6G reliable?

The price and inventory of SF2L6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF2L6G is usually 5 days.

3.What payment methods are accepted for SF2L6G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF2L6G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF2L6G?

SF2L6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF2L6G 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 SF2L6G?

For technical support, including SF2L6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF2L6G requirements.

6.How does Aetrix verify that SF2L6G is sourced from the original manufacturer or authorized distributors?

All SF2L6G 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 SF2L6G meets industry standards.

7.What is the process for return or replacement of SF2L6G?

All SF2L6G units undergo pre-shipment inspection (PSI). If there is an issue with SF2L6G, 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 SF2L6G part is unused and in its original packaging.

Return procedure for SF2L6G:

1.Submit a request within 90 days.

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

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