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

Taiwan Semiconductor Corporation SF24G-T

Name: SF24G-T
Brand: Taiwan Semiconductor Corporation
SKU: SF24G-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF24G-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SF24G-T.pdf

Description:: 35NS, 2A, 200V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:9,412

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Product details

Overview

SF24G-T from Taiwan Semiconductor is a 2 A, 200 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 2 A, and 50 A surge current capability - deployed in DC-DC converters and switching-mode power supplies for high-efficiency freewheeling.

For engineers reviewing the SF24G-T datasheet, SF24G-T pinout, SF24G-T application, or SF24G-T equivalent, key selection criteria include repetitive peak reverse voltage (200 V), junction-to-ambient thermal resistance (65 °C/W), low forward voltage drop, and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

This super fast rectifier uses a glass-passivated single-die silicon junction optimized for high-frequency switching applications. Its 35 ns trr and 40 pF junction capacitance enable efficient operation in 50–500 kHz SMPS topologies while maintaining low conduction loss.

The device operates across –55 °C to +150 °C junction temperature range with 16 °C/W junction-to-case thermal resistance, supporting thermally constrained PCB layouts. Cathode-band polarity marking and pure tin-plated leads ensure reliable solderability per J-STD-002.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling clamp circuits
I_F	2 A continuous - rated average forward current at 75 °C ambient; determines heatsink-free power handling in compact converters
t_rr	35 ns - measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables minimal switching loss in high-frequency topologies
V_F	0.95 V @ 2 A, 25 °C - low conduction loss improves efficiency in 12–48 V output DC-DC stages
C_J	40 pF @ 1 MHz, 4 V - limits capacitive coupling noise and EMI in high-dV/dt environments
R_θJA	65 °C/W - thermal resistance from junction to ambient; informs board layout copper area requirements for thermal management

Pinout & Package

DO-204AC (DO-15) axial-leaded package with cathode band marking; 0.400 g mass; UL 94V-0 molding compound; pure tin-plated leads compliant with JESD 201 Class 1A whisker testing.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); requires adequate trace width for 2 A RMS
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output rail or ground return; critical for correct polarity in freewheeling path

Key Features

Feature	Design Value
Glass passivated junction	Enhances humidity resistance and long-term reliability under thermal cycling in industrial power modules
Super fast recovery (35 ns)	Reduces reverse recovery charge (Q_rr) and associated switching losses vs. standard rectifiers in >100 kHz designs
Low V_F (0.95 V)	Lowers conduction loss by ~15% compared to 1.1 V alternatives at 2 A, improving full-load efficiency in 24 V systems
RoHS & halogen-free	Meets IEC 61249-2-21; supports compliance-critical deployments in EU/Asia-sourced industrial equipment

Applications

DC-DC Converter Freewheeling	Switch-Mode Inverter Output Stage
Use Scenario: Freewheeling path in synchronous or non-synchronous buck converters delivering 12–48 V at up to 2 A. IC Role / Device Role / Timing Role: Unidirectional current path during low-side switch off-time; blocks reverse voltage during high-side conduction. Use Value: 35 ns t_rr minimizes shoot-through risk and reduces EMI generation during transition edges.	Use Scenario: Output rectification in half-bridge inverters for motor drives or UPS systems. IC Role / Device Role / Timing Role: High-speed commutation of inductive load current; handles bidirectional voltage reversal during PWM dead-time. Use Value: 200 V V_RRM and 50 A I_FSM support robust operation under transient overvoltage and motor back-EMF spikes.
AC-DC Auxiliary Supply	Industrial LED Driver Secondary Side
Use Scenario: Rectification in auxiliary bias supplies derived from main transformer windings in offline SMPS. IC Role / Device Role / Timing Role: Low-power, high-reliability AC input rectifier feeding linear or buck controller ICs. Use Value: 0.95 V V_F ensures stable 5–15 V bias rails even at light loads without excessive dropout.	Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting or signage. IC Role / Device Role / Timing Role: Isolated output rectifier converting high-frequency transformer output to DC for LED string current regulation. Use Value: 40 pF C_J and 65 °C/W R_θJA allow compact layout with minimal parasitic ringing and self-heating in sealed enclosures.

DC-DC Converter Freewheeling

Switch-Mode Inverter Output Stage

Use Scenario: Freewheeling path in synchronous or non-synchronous buck converters delivering 12–48 V at up to 2 A.

IC Role / Device Role / Timing Role: Unidirectional current path during low-side switch off-time; blocks reverse voltage during high-side conduction.

Use Value: 35 ns t_rr minimizes shoot-through risk and reduces EMI generation during transition edges.

Use Scenario: Output rectification in half-bridge inverters for motor drives or UPS systems.

IC Role / Device Role / Timing Role: High-speed commutation of inductive load current; handles bidirectional voltage reversal during PWM dead-time.

Use Value: 200 V V_RRM and 50 A I_FSM support robust operation under transient overvoltage and motor back-EMF spikes.

AC-DC Auxiliary Supply

Industrial LED Driver Secondary Side

Use Scenario: Rectification in auxiliary bias supplies derived from main transformer windings in offline SMPS.

IC Role / Device Role / Timing Role: Low-power, high-reliability AC input rectifier feeding linear or buck controller ICs.

Use Value: 0.95 V V_F ensures stable 5–15 V bias rails even at light loads without excessive dropout.

Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting or signage.

IC Role / Device Role / Timing Role: Isolated output rectifier converting high-frequency transformer output to DC for LED string current regulation.

Use Value: 40 pF C_J and 65 °C/W R_θJA allow compact layout with minimal parasitic ringing and self-heating in sealed 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
STTH2R02U (STMicroelectronics)	Same 2 A / 200 V rating; 30 ns t_rr, 0.92 V V_F; TO-220AC package (larger footprint, better thermal dissipation)	Preferred where board space allows and higher thermal margin is needed; not DO-15 drop-in	Select when thermal design requires >16 °C/W R_θJC or >50 W power handling
ES2D (Vishay)	2 A / 200 V; 35 ns t_rr, 0.95 V V_F; same DO-204AC package; 5 µA max I_R @ 25 °C (vs. 5 µA for SF24G-T)	Direct physical replacement; identical pinout and mounting; minor leakage spec alignment	Choose for second-source assurance with matched electrical and mechanical behavior

Compared with STTH2R02U, SF24G-T offers smaller DO-15 footprint and lower cost for space-constrained designs; versus ES2D, it provides identical form-fit-function with verified halogen-free compliance per IEC 61249-2-21.

Availability

SF24G-T is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for SF24G-T 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 global industrial, computing, and power electronics markets since 1979.

The SF-series super fast rectifiers are engineered for high-frequency switching power conversion, emphasizing low V_F, fast t_rr, and robust thermal performance in compact axial packages for cost-sensitive industrial power supplies.

FAQ

What is the maximum repetitive peak reverse voltage rating for SF24G-T?

The SF24G-T has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse voltage the device can block repeatedly without breakdown under normal operating conditions. Exceeding 200 V risks avalanche failure. The SF24G-T is part of the SF21G-T to SF28G-T family, where the digit '24' directly indicates the 200 V rating.

What is the forward voltage drop of SF24G-T at its rated current?

The SF24G-T exhibits a typical forward voltage (V_F) of 0.95 V at 2 A forward current and 25 °C junction temperature, per the Electrical Specifications table. This low V_F contributes to reduced conduction losses in power conversion stages. The measurement is based on a pulse test with 0.3 ms pulse width, ensuring accurate characterization under realistic switching conditions. The SF24G-T maintains this V_F performance across its qualified operating temperature range.

Does SF24G-T meet RoHS and halogen-free requirements?

Yes, the SF24G-T is RoHS compliant and halogen-free in accordance with IEC 61249-2-21. This is explicitly stated in the FEATURES section and confirmed in the Notice page of the datasheet. The device uses green molding compound and pure tin-plated leads, satisfying environmental regulations for industrial and commercial electronics. These compliance attributes are inherent to the SF24G-T part number and verified in TSC's manufacturing process control.

What is the reverse recovery time (t_rr) specification for SF24G-T?

The SF24G-T has a maximum reverse recovery time (t_rr) of 35 ns, tested under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value is listed in the ELECTRICAL SPECIFICATIONS table and applies specifically to the SF24G-T variant. The 35 ns t_rr enables efficient operation in high-frequency switching applications such as 200–500 kHz DC-DC converters where fast diode turn-off is critical to minimize switching loss.

What package type does SF24G-T use, and what are its key mechanical properties?

The SF24G-T uses the DO-204AC (DO-15) axial-leaded package. Key mechanical properties include UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002 solderability standards, cathode band polarity marking, and a nominal weight of 0.400 g. The package outline dimensions and marking diagram are documented in the PACKAGE OUTLINE DIMENSIONS section of the datasheet, confirming full compatibility with standard DO-15 footprint and assembly processes.

SF24G-T 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):: 200 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 2 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 200 V

Capacitance @ Vr, F:: 40pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

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

SF24G-T FAQ

1.How can I place an order for SF24G-T through Aetrix?

Please submit a Request for Quotation (RFQ) for SF24G-T 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 SF24G-T reliable?

The price and inventory of SF24G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF24G-T is usually 5 days.

3.What payment methods are accepted for SF24G-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF24G-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF24G-T?

SF24G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF24G-T 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 SF24G-T?

For technical support, including SF24G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF24G-T requirements.

6.How does Aetrix verify that SF24G-T is sourced from the original manufacturer or authorized distributors?

All SF24G-T 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 SF24G-T meets industry standards.

7.What is the process for return or replacement of SF24G-T?

All SF24G-T units undergo pre-shipment inspection (PSI). If there is an issue with SF24G-T, 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 SF24G-T part is unused and in its original packaging.

Return procedure for SF24G-T:

1.Submit a request within 90 days.

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

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