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

Taiwan Semiconductor Corporation SF25G

Name: SF25G
Brand: Taiwan Semiconductor Corporation
SKU: SF25G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF25G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SF25G.pdf

Description:: DIODE GEN PURP 300V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,481

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Product details

Overview

SF25G from Taiwan Semiconductor is a 2 A, 300 V repetitive peak reverse voltage super fast rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 1.30 V forward voltage at 2 A and 25°C, and 20 pF junction capacitance - used in DC-DC converters and switching mode inverters.

For engineers reviewing the SF25G datasheet, SF25G pinout, SF25G application, or SF25G equivalent, key selection criteria include its 300 V V_RRM, 50 A I_FSM, 150°C maximum junction temperature, AEC-Q101 qualification option, and thermal resistance of 65°C/W (junction-to-ambient).

Technical Context

This single-die silicon rectifier uses glass passivated junction technology to achieve high surge current capability (50 A, 8.3 ms half-sine) and low power loss. Its 35 ns trr and 20 pF CJ support high-frequency switching in SMPS topologies.

The device operates across –55°C to +150°C junction temperature range with pure tin-plated leads compliant to J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked by cathode band on DO-204AC body.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	300 V - supports 300 V DC bus or 210 V RMS input in AC-DC front ends
I_F	2 A continuous - rated for sustained conduction in low-to-medium power converters
I_FSM	50 A - handles transient surges without failure in motor drive freewheeling paths
t_rr	35 ns - enables efficient operation up to ~3 MHz switching frequencies
V_F	1.30 V @ 2 A, 25°C - contributes to <1.3 W conduction loss at full load
C_J	20 pF @ 4 V - minimizes capacitive switching losses and EMI in high-dV/dt circuits
R_θJA	65°C/W - requires ≤13°C ambient rise at 2 A to stay within 150°C T_J limit

Pinout & Package

DO-204AC (DO-15) axial-leaded package with cathode indicated by band; no internal pins - two terminals only: anode and cathode.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential side (e.g., switch node in buck converter)
Cathode	Current exit point during forward conduction; polarity marker via band	Connected to output rail or ground return path; defines unidirectional current flow

Key Features

Feature	Design Value
Super fast recovery (t_rr = 35 ns)	Reduces switching losses and improves efficiency in 100 kHz–1 MHz SMPS designs
Glass passivated junction	Enhances reliability under humidity and thermal cycling vs. epoxy-passivated alternatives
AEC-Q101 qualified version available	Validated for automotive under-hood applications including engine control and lighting modules
RoHS & halogen-free (IEC 61249-2-21)	Meets global environmental compliance requirements for industrial and consumer end equipment
UL 94V-0 molding compound	Provides flame-retardant housing essential for safety-critical power supplies

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at ≤2 A. IC Role / Device Role / Timing Role: Unidirectional current steering diode enabling synchronous or non-synchronous rectification. Use Value: 1.30 V V_F and 35 ns t_rr reduce conduction and switching losses, improving overall conversion efficiency by ~1.2% over standard FR107.	Use Scenario: Freewheeling path in H-bridge motor drives or solar microinverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Clamp diode providing safe current recirculation during MOSFET turn-off transitions. Use Value: 50 A I_FSM withstands motor startup surges; 20 pF C_J limits capacitive shoot-through in bridge legs.
AC-DC Adapters	Automotive Lighting Modules
Use Scenario: Output rectification in compact 12–19 V, 20–40 W wall adapters with universal AC input. IC Role / Device Role / Timing Role: High-efficiency output stage diode replacing slower UF4007 in cost-sensitive designs. Use Value: 65°C/W R_θJA allows natural convection cooling without heatsink in enclosed plastic housings.	Use Scenario: LED driver rectification in headlamp or DRL modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Input-stage rectifier converting alternator output (13.5–14.5 V) to stable DC bus. Use Value: AEC-Q101-qualified variant ensures operation at 125°C ambient with 150°C T_J margin and JESD201 Class 2 whisker resistance.

DC-DC Converters

Switching Inverters

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

IC Role / Device Role / Timing Role: Unidirectional current steering diode enabling synchronous or non-synchronous rectification.

Use Value: 1.30 V V_F and 35 ns t_rr reduce conduction and switching losses, improving overall conversion efficiency by ~1.2% over standard FR107.

Use Scenario: Freewheeling path in H-bridge motor drives or solar microinverters operating at 20–100 kHz.

IC Role / Device Role / Timing Role: Clamp diode providing safe current recirculation during MOSFET turn-off transitions.

Use Value: 50 A I_FSM withstands motor startup surges; 20 pF C_J limits capacitive shoot-through in bridge legs.

AC-DC Adapters

Automotive Lighting Modules

Use Scenario: Output rectification in compact 12–19 V, 20–40 W wall adapters with universal AC input.

IC Role / Device Role / Timing Role: High-efficiency output stage diode replacing slower UF4007 in cost-sensitive designs.

Use Value: 65°C/W R_θJA allows natural convection cooling without heatsink in enclosed plastic housings.

Use Scenario: LED driver rectification in headlamp or DRL modules exposed to under-hood temperatures.

IC Role / Device Role / Timing Role: Input-stage rectifier converting alternator output (13.5–14.5 V) to stable DC bus.

Use Value: AEC-Q101-qualified variant ensures operation at 125°C ambient with 150°C T_J margin and JESD201 Class 2 whisker resistance.

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	V_RRM = 600 V, V_F = 1.7 V @ 2 A, t_rr = 35 ns, DO-15	Higher blocking voltage but higher forward drop; less optimal for 300 V systems	Select when system requires >420 V RMS input compatibility and can tolerate +0.4 V V_F
ES2D	V_RRM = 200 V, V_F = 0.95 V @ 2 A, t_rr = 35 ns, DO-15	Lower V_RRM limits use to ≤140 V RMS inputs; lower V_F reduces conduction loss	Prefer for 100–120 V AC-input adapters where 300 V margin is unnecessary

Compared with STTH2R06 and ES2D, the SF25G delivers optimal balance of 300 V rating, 1.30 V forward drop, and 35 ns recovery for mid-voltage SMPS - avoiding over-spec'd voltage headroom or insufficient blocking capability.

Availability

SF25G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive lighting modules requiring stable component supply with traceable sourcing and long-term lifecycle support.

Supply support for SF25G 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 SF21G–SF28G series was designed specifically for high-efficiency, high-reliability rectification in switching power supplies - emphasizing fast recovery, thermal robustness, and AEC-Q101 qualification readiness.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF25G?

The SF25G has a V_RRM of 300 V, confirmed in the Absolute Maximum Ratings table of the H2105 datasheet. This rating defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown, making it suitable for 210 V RMS AC inputs or 300 V DC bus applications. Exceeding this value risks avalanche failure.

Is SF25G RoHS and halogen-free compliant?

Yes, SF25G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the H2105 datasheet. The molding compound meets UL 94V-0 flammability rating, and terminals are pure tin plated to satisfy J-STD-002 solderability requirements - all verified for SF25G within the SF21G–SF28G family documentation.

Does SF25G have AEC-Q101 qualification?

The base SF25G is not AEC-Q101 qualified, but the AEC-Q101-qualified variant is designated SF25GH (as noted in the ORDERING INFORMATION table). SF25GH shares identical electrical and thermal specs with SF25G but adds automotive-grade stress testing and traceability - required for under-hood automotive applications.

What is the forward voltage (V_F) of SF25G at rated current?

The SF25G exhibits a typical forward voltage of 1.30 V at 2 A and 25°C, per the ELECTRICAL SPECIFICATIONS table. This value is measured under pulsed conditions (PW = 0.3 ms) and increases with junction temperature - at 125°C, V_F rises to approximately 1.15 V due to negative temperature coefficient of silicon diodes.

What package type does SF25G use, and what are its mechanical features?

SF25G uses the DO-204AC (DO-15) axial-leaded package, with cathode polarity indicated by a band. It weighs ~0.400 g, features UL 94V-0 flame-retardant molding compound, and uses pure tin-plated leads compliant to J-STD-002. The package meets JESD201 Class 2 whisker resistance, ensuring long-term solder joint integrity.

SF25G 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):: 300 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:: 5 µA @ 300 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

SF25G FAQ

1.How can I place an order for SF25G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF25G 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 SF25G reliable?

The price and inventory of SF25G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF25G is usually 5 days.

3.What payment methods are accepted for SF25G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF25G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF25G?

SF25G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF25G 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 SF25G?

For technical support, including SF25G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF25G requirements.

6.How does Aetrix verify that SF25G is sourced from the original manufacturer or authorized distributors?

All SF25G 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 SF25G meets industry standards.

7.What is the process for return or replacement of SF25G?

All SF25G units undergo pre-shipment inspection (PSI). If there is an issue with SF25G, 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 SF25G part is unused and in its original packaging.

Return procedure for SF25G:

1.Submit a request within 90 days.

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

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