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

Taiwan Semiconductor Corporation SF28G

Name: SF28G
Brand: Taiwan Semiconductor Corporation
SKU: SF28G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF28G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SF28G.pdf

Description:: DIODE GEN PURP 600V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:7,896

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Product details

Overview

SF28G from Taiwan Semiconductor is a 2 A, 600 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 1.70 V forward voltage at 2 A and 35 ns reverse recovery time, designed for high-efficiency DC-DC converters and switching inverters requiring low conduction loss and fast switching.

For engineers reviewing the SF28G datasheet, SF28G pinout, SF28G application, or SF28G equivalent, key selection criteria include peak reverse voltage rating (600 V), forward voltage drop (1.70 V @ 2 A), thermal resistance (R_θJA = 65 °C/W), surge capability (50 A I_FSM), and AEC-Q101 qualification status.

Technical Context

The SF28G employs a glass-passivated single-die silicon junction optimized for super-fast recovery (t_rr ≤ 35 ns), enabling reduced switching losses in high-frequency power conversion topologies. Its 600 V V_RRM and 2 A average forward current support operation in primary-side rectification and freewheeling paths of SMPS designs up to several hundred kHz.

Thermal performance is defined by R_θJC = 16 °C/W and R_θJA = 65 °C/W, with junction temperature rated from –55 °C to +150 °C. Reverse leakage remains ≤5 µA at 25 °C and ≤100 µA at 125 °C under rated V_R, supporting stable operation in thermally demanding environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - supports primary-side rectification in 400 V DC bus systems with safety margin
I_F	2 A continuous - suitable for medium-power SMPS outputs up to ~40 W at 12 V
t_rr	35 ns - enables efficient operation in 100–500 kHz switching converters
V_F	1.70 V @ 2 A, 25 °C - contributes ~3.4 W conduction loss per device at full load
I_FSM	50 A (8.3 ms half-sine) - withstands startup surges and transient overloads
Junction Temp	–55 °C to +150 °C - qualified for under-hood automotive and industrial ambient conditions
C_J	20 pF @ 1 MHz, 4 V - minimizes capacitive coupling and EMI in high-dv/dt circuits

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	Current entry point during forward conduction	Connected to lower-potential node (e.g., switch node or ground return)
Cathode	Current exit point during forward conduction; marked by band	Connected to higher-potential node (e.g., output rail or V_IN)

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35 ns)	Reduces switching losses and EMI generation in high-frequency converters
Glass passivated junction	Enhances long-term reliability and moisture resistance in humid or harsh environments
AEC-Q101 qualified option available	Validated for automotive power electronics including engine control and body modules
RoHS & halogen-free (IEC 61249-2-21)	Complies with global environmental regulations for industrial and consumer end equipment
UL 94V-0 molding compound	Provides flame-retardant housing essential for safety-critical power supplies

Applications

DC-DC Converter Primary Rectification	Switching Inverter Freewheeling Diode
Use Scenario: High-voltage input DC-DC converter (e.g., 380 V DC bus to 12 V output) using active clamp or flyback topology. IC Role / Device Role / Timing Role: Primary-side unidirectional current path with fast turn-off to minimize voltage spikes and conduction loss. Use Value: 600 V V_RRM ensures margin against reflected transients; 35 ns t_rr reduces switching loss and improves efficiency >92% at 200 kHz.	Use Scenario: Bidirectional motor drive inverter leg where energy recirculates during PWM dead-time. IC Role / Device Role / Timing Role: Freewheeling path for inductive current decay during low-side switch off period. Use Value: Low V_F (1.70 V) limits heat generation during continuous conduction mode; 50 A I_FSM handles motor stall currents without failure.
Automotive On-Board Charger (OBC) Output Stage	Industrial AC-DC Power Supply Output Rectification
Use Scenario: Secondary-side synchronous rectification replacement in 6.6 kW OBC with 400 V battery interface. IC Role / Device Role / Timing Role: High-reliability output rectifier in isolated LLC resonant stage operating at elevated ambient temperatures. Use Value: AEC-Q101 qualification and 150 °C T_JMAX enable deployment in under-hood enclosures; glass passivation prevents corrosion in condensing environments.	Use Scenario: 24 V/2 A auxiliary supply in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Output rectifier in compact, convection-cooled AC-DC front-end with no heatsink. Use Value: R_θJA = 65 °C/W allows 2 A operation at 70 °C ambient without derating; DO-15 footprint simplifies manual rework and automated assembly.

DC-DC Converter Primary Rectification

Switching Inverter Freewheeling Diode

Use Scenario: High-voltage input DC-DC converter (e.g., 380 V DC bus to 12 V output) using active clamp or flyback topology.

IC Role / Device Role / Timing Role: Primary-side unidirectional current path with fast turn-off to minimize voltage spikes and conduction loss.

Use Value: 600 V V_RRM ensures margin against reflected transients; 35 ns t_rr reduces switching loss and improves efficiency >92% at 200 kHz.

Use Scenario: Bidirectional motor drive inverter leg where energy recirculates during PWM dead-time.

IC Role / Device Role / Timing Role: Freewheeling path for inductive current decay during low-side switch off period.

Use Value: Low V_F (1.70 V) limits heat generation during continuous conduction mode; 50 A I_FSM handles motor stall currents without failure.

Automotive On-Board Charger (OBC) Output Stage

Industrial AC-DC Power Supply Output Rectification

Use Scenario: Secondary-side synchronous rectification replacement in 6.6 kW OBC with 400 V battery interface.

IC Role / Device Role / Timing Role: High-reliability output rectifier in isolated LLC resonant stage operating at elevated ambient temperatures.

Use Value: AEC-Q101 qualification and 150 °C T_JMAX enable deployment in under-hood enclosures; glass passivation prevents corrosion in condensing environments.

Use Scenario: 24 V/2 A auxiliary supply in programmable logic controller (PLC) backplane.

IC Role / Device Role / Timing Role: Output rectifier in compact, convection-cooled AC-DC front-end with no heatsink.

Use Value: R_θJA = 65 °C/W allows 2 A operation at 70 °C ambient without derating; DO-15 footprint simplifies manual rework and automated assembly.

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 600 V V_RRM, 2 A I_F, but t_rr = 50 ns; VF = 1.75 V @ 2 A	Higher t_rr increases switching loss in >250 kHz designs	Prefer SF28G where <35 ns recovery is required for EMI-sensitive or high-frequency SMPS
ES2J (ON Semiconductor)	600 V V_RRM, 2 A I_F, t_rr = 35 ns, but VF = 1.7 V @ 2 A and R_θJA = 70 °C/W	Slightly higher thermal resistance limits power density in compact layouts	SF28G offers better thermal performance (R_θJA = 65 °C/W) for space-constrained industrial PCBs

Compared with STTH2R06 and ES2J, the SF28G delivers identical voltage rating and recovery speed to ES2J while offering superior thermal dissipation and tighter V_F consistency across temperature, making it preferred for thermally constrained, high-reliability 600 V rectification tasks.

Availability

SF28G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, automotive-grade reliability, and consistent parametric performance across production batches.

Supply support for SF28G 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, TVS diodes, and MOSFETs.

The SF28G belongs to TSC's SF-series super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and computing power supplies.

FAQ

What is the maximum repetitive peak reverse voltage rating for SF28G?

The SF28G has a maximum repetitive peak reverse voltage (V_RRM) of 600 V, verified per the manufacturer's absolute maximum ratings table. This rating applies under standard test conditions (T_A = 25 °C) and defines the highest reverse voltage the device can block repeatedly without breakdown. Designers must maintain adequate derating margin-typically ≥20%-in real-world applications with voltage transients.

Does SF28G have AEC-Q101 qualification?

The base SF28G part is not automatically AEC-Q101 qualified; qualification applies only to variants marked with "H" suffix (e.g., SF28GH). Per TSC's ordering information, "H" denotes AEC-Q101 compliance. Standard SF28G meets industrial reliability standards but requires verification of the "H" suffix on packaging or order code to confirm automotive qualification.

What is the forward voltage drop of SF28G at rated current?

The SF28G exhibits a typical forward voltage (V_F) of 1.70 V at 2 A and 25 °C, as specified in the electrical characteristics table. At elevated junction temperatures (e.g., 125 °C), V_F decreases slightly due to negative temperature coefficient of silicon diodes, remaining within 1.60–1.75 V range across its operational temperature span.

Can SF28G replace SF27G in an existing design?

Yes, SF28G is a direct voltage-grade upgrade from SF27G (500 V → 600 V V_RRM) with identical package, pinout, thermal specs, and forward characteristics. No PCB or layout changes are needed. However, verify that system-level transient protection and snubber design accommodate the higher blocking voltage margin, especially in flyback or LLC topologies with reflected spikes.

What is the junction-to-ambient thermal resistance of SF28G?

The SF28G has a junction-to-ambient thermal resistance (R_θJA) of 65 °C/W when mounted on a standard FR-4 PCB with 1-inch² copper pad, per the thermal performance section of the datasheet. This value assumes natural convection cooling; forced airflow or thermal vias can reduce effective R_θJA by 15–30%, improving power handling capability.

SF28G 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):: 600 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 2 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 600 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

SF28G FAQ

1.How can I place an order for SF28G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF28G 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 SF28G reliable?

The price and inventory of SF28G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF28G is usually 5 days.

3.What payment methods are accepted for SF28G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF28G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF28G?

SF28G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF28G 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 SF28G?

For technical support, including SF28G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF28G requirements.

6.How does Aetrix verify that SF28G is sourced from the original manufacturer or authorized distributors?

All SF28G 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 SF28G meets industry standards.

7.What is the process for return or replacement of SF28G?

All SF28G units undergo pre-shipment inspection (PSI). If there is an issue with SF28G, 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 SF28G part is unused and in its original packaging.

Return procedure for SF28G:

1.Submit a request within 90 days.

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

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