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

Taiwan Semiconductor Corporation SF26G A0G

Name: SF26G A0G
Brand: Taiwan Semiconductor Corporation
SKU: SF26G A0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF26G A0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SF26G A0G.pdf

Description:: DIODE GEN PURP 400V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SF26G A0G from Taiwan Semiconductor is a 400V, 2A super fast rectifier diode in DO-204AC (DO-15) package, featuring 35ns reverse recovery time, 1.30V forward voltage at 2A/25°C, and 50A surge capability - deployed in switching-mode DC-DC converters requiring low-loss freewheeling paths.

For engineers reviewing the SF26G A0G datasheet, SF26G A0G pinout, SF26G A0G application, or SF26G A0G equivalent, key selection criteria include V_RRM = 400V, I_F = 2A, t_rr = 35ns, thermal resistance R_θJA = 65°C/W, and DO-204AC mechanical compatibility with legacy through-hole layouts.

Technical Context

This single-die silicon rectifier uses glass-passivated junction technology to achieve high surge robustness and stable reverse leakage (<5µA @ 25°C, <100µA @ 125°C) under repetitive switching stress. Its 35ns t_rr enables operation in high-frequency SMPS topologies up to several hundred kHz without excessive switching loss.

The device operates across -55°C to +150°C junction temperature range and delivers 2A average forward current with derating above 75°C ambient. Junction-to-case thermal resistance of 16°C/W supports moderate heatsinking in compact power stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum non-repetitive reverse voltage before breakdown; defines safe operating margin in 350V DC bus applications.
I_F	2 A - Continuous average forward current rating at 75°C ambient; sets baseline conduction capacity for output rectification.
t_rr	35 ns - Measured reverse recovery time at I_F=0.5A, I_R=1.0A, I_rr=0.25A; enables efficient operation in 200–500 kHz SMPS designs.
V_F	1.30 V - Forward voltage drop at I_F=2A and T_J=25°C; directly determines conduction loss (2.6W max at full load).
C_J	20 pF - Junction capacitance at 1MHz, V_R=4.0V; impacts high-frequency noise coupling and snubber design in flyback converters.
I_FSM	50 A - Non-repetitive surge current (8.3ms half-sine); withstands inrush and fault transients in industrial power supplies.
R_θJA	65 °C/W - Junction-to-ambient thermal resistance in free-air; defines required PCB copper area and airflow for thermal management.

Pinout & Package

DO-204AC (DO-15) axial-leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node in synchronous rectification).
Cathode	Forward current exit / reverse blocking terminal	Marked by colored band; ties to output rail or filter capacitor positive; blocks 400V reverse voltage during off-state.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures long-term reliability and stable leakage performance under humidity and thermal cycling stress.
Super fast recovery (35ns)	Reduces switching losses and EMI generation compared to standard rectifiers in high-frequency converters.
RoHS & halogen-free compliance	Meets IEC 61249-2-21; supports environmentally regulated industrial and automotive production programs.
UL 94V-0 molding compound	Provides flame-retardant encapsulation essential for safety-critical power supply certifications (e.g., UL 62368-1).
AEC-Q101 qualified option available	Enables use in automotive-grade power modules where qualification beyond standard industrial specs is mandated.

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: High-efficiency 48V-to-12V isolated buck-derived converter in telecom power shelf. IC Role / Device Role / Timing Role: Primary output rectifier conducting 2A continuous current with minimal conduction loss and fast turn-off to minimize dead-time losses. Use Value: 1.30V V_F and 35ns t_rr reduce total power loss by ~18% versus standard FR107 in same layout.	Use Scenario: Bidirectional H-bridge inverter driving inductive motor loads with regenerative braking. IC Role / Device Role / Timing Role: Freewheeling path for inductive kickback during PWM off-periods; handles 50A surge peaks during fault events. Use Value: 50A I_FSM and 400V V_RRM provide 2× safety margin over 240V AC line-derived DC bus.
Industrial SMPS Auxiliary Supply	LED Driver Secondary Rectification
Use Scenario: 12V/0.5A auxiliary bias supply derived from main transformer auxiliary winding. IC Role / Device Role / Timing Role: Low-current, high-reliability rectifier operating continuously at <0.5A with minimal self-heating. Use Value: 5µA reverse leakage at 25°C ensures negligible standby power drain in always-on control circuits.	Use Scenario: Constant-current LED driver with flyback topology powering 24V LED strings. IC Role / Device Role / Timing Role: Output rectifier synchronizing with primary-side switching frequency (~100kHz) to maintain regulation accuracy. Use Value: 20pF junction capacitance minimizes capacitive coupling noise into current-sense feedback path.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: High-efficiency 48V-to-12V isolated buck-derived converter in telecom power shelf.

IC Role / Device Role / Timing Role: Primary output rectifier conducting 2A continuous current with minimal conduction loss and fast turn-off to minimize dead-time losses.

Use Value: 1.30V V_F and 35ns t_rr reduce total power loss by ~18% versus standard FR107 in same layout.

Use Scenario: Bidirectional H-bridge inverter driving inductive motor loads with regenerative braking.

IC Role / Device Role / Timing Role: Freewheeling path for inductive kickback during PWM off-periods; handles 50A surge peaks during fault events.

Use Value: 50A I_FSM and 400V V_RRM provide 2× safety margin over 240V AC line-derived DC bus.

Industrial SMPS Auxiliary Supply

LED Driver Secondary Rectification

Use Scenario: 12V/0.5A auxiliary bias supply derived from main transformer auxiliary winding.

IC Role / Device Role / Timing Role: Low-current, high-reliability rectifier operating continuously at <0.5A with minimal self-heating.

Use Value: 5µA reverse leakage at 25°C ensures negligible standby power drain in always-on control circuits.

Use Scenario: Constant-current LED driver with flyback topology powering 24V LED strings.

IC Role / Device Role / Timing Role: Output rectifier synchronizing with primary-side switching frequency (~100kHz) to maintain regulation accuracy.

Use Value: 20pF junction capacitance minimizes capacitive coupling noise into current-sense feedback path.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R04	V_RRM = 400V, I_F = 2A, t_rr = 30ns, VF = 1.35V @ 2A - slightly faster but higher V_F.	Optimized for ultra-low-noise PFC stages; tighter t_rr tolerance but less surge margin (I_FSM = 45A).	Prefer when t_rr consistency is critical and surge stress is low.
ON Semi MUR240	V_RRM = 400V, I_F = 2A, t_rr = 50ns, V_F = 1.25V @ 2A - slower recovery but lower forward drop.	Better conduction efficiency in low-frequency (<100kHz) inverters; higher leakage (10µA @ 25°C).	Prefer when thermal budget dominates and switching frequency ≤100kHz.

Compared with STTH2R04 and MUR240, SF26G A0G offers balanced trade-off: 35ns t_rr supports 300kHz+ operation while maintaining 50A surge headroom and 1.30V V_F, making it optimal for cost-sensitive industrial SMPS where both speed and ruggedness matter.

Availability

SF26G A0G is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent DO-204AC form factor, and AEC-Q101-qualified variants for automotive-adjacent systems.

Supply support for SF26G A0G 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 rectifiers, TVS devices, and MOSFETs for industrial and consumer markets.

The SF2xG series was designed specifically for high-reliability, high-frequency switching power supplies - emphasizing low t_rr, stable V_F, and robust surge handling in compact DO-204AC packaging.

FAQ

What is the peak repetitive reverse voltage rating for SF26G A0G?

The SF26G A0G has a peak repetitive reverse voltage (V_RRM) rating of 400V, verified per Taiwan Semiconductor's H2105 datasheet. This value defines the maximum allowable reverse-biased voltage the device can block repeatedly without breakdown. It is not interchangeable with SF25G (300V) or SF27G (500V), and must be respected in circuit design to ensure long-term reliability of SF26G A0G.

Does SF26G A0G have AEC-Q101 qualification?

SF26G A0G itself is not AEC-Q101 qualified; only the "H" suffix variant (SF26GH or SF26GHA0G) meets AEC-Q101. The "A0G" suffix denotes ammo box packaging (1,500 units), not qualification level. Engineers requiring automotive-grade validation must specify SF26GH or confirm qualification status via Taiwan Semiconductor's official documentation before using SF26G A0G in vehicle applications.

What is the forward voltage drop of SF26G A0G at rated current?

The forward voltage (V_F) of SF26G A0G is 1.30V maximum at I_F = 2A and T_J = 25°C, as specified in the electrical characteristics table. This value increases with junction temperature and current - e.g., ~1.45V at 125°C - and directly determines conduction loss in power stage calculations for SF26G A0G.

Is SF26G A0G compatible with lead-free reflow soldering processes?

SF26G A0G features pure tin-plated leads compliant with J-STD-002 for solderability, and its DO-204AC package is rated for lead-free wave and hand-soldering. However, it is not designed for lead-free reflow due to axial-leaded construction and thermal mass limitations - reflow may cause internal delamination. Recommended assembly for SF26G A0G is wave or selective soldering per JEDEC J-STD-020 guidelines.

What is the junction-to-ambient thermal resistance of SF26G A0G?

The junction-to-ambient thermal resistance (R_θJA) of SF26G A0G is 65°C/W under standard free-air conditions, per the thermal performance section of the datasheet. This value assumes no added heatsinking and guides minimum PCB copper area requirements - e.g., ≥1.5 cm² of 2-oz copper per lead - to maintain T_J ≤150°C when SF26G A0G conducts 2A continuously.

SF26G A0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Cut Tape (CT)

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:: 5 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

SF26G A0G FAQ

1.How can I place an order for SF26G A0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF26G A0G 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 SF26G A0G reliable?

The price and inventory of SF26G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF26G A0G is usually 5 days.

3.What payment methods are accepted for SF26G A0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF26G A0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF26G A0G?

SF26G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF26G A0G 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 SF26G A0G?

For technical support, including SF26G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF26G A0G requirements.

6.How does Aetrix verify that SF26G A0G is sourced from the original manufacturer or authorized distributors?

All SF26G A0G 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 SF26G A0G meets industry standards.

7.What is the process for return or replacement of SF26G A0G?

All SF26G A0G units undergo pre-shipment inspection (PSI). If there is an issue with SF26G A0G, 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 SF26G A0G part is unused and in its original packaging.

Return procedure for SF26G A0G:

1.Submit a request within 90 days.

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

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