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

Taiwan Semiconductor Corporation SFT15G A1G

Name: SFT15G A1G
Brand: Taiwan Semiconductor Corporation
SKU: SFT15G A1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFT15G A1G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: T-18, Axial

Datasheet:: SFT15G A1G.pdf

Description:: DIODE GEN PURP 300V 1A TS-1

Quantity:: RFQ Add To RFQ list

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Inventory:5,554

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Product details

Overview

SFT15G from Taiwan Semiconductor is a 1 A, 300 V repetitive peak reverse voltage super fast rectifier diode in TS-1 package, featuring 1.30 V forward voltage at 1 A and 35 ns reverse recovery time, used for freewheeling and switching-mode DC-DC converter output stages.

For engineers reviewing the SFT15G datasheet, SFT15G pinout, SFT15G application, or SFT15G equivalent, key selection criteria include V_RRM = 300 V, I_F = 1 A, t_rr = 35 ns, V_F = 1.30 V, and thermal resistance R_θJA = 100 °C/W - all critical for high-efficiency, high-frequency power conversion designs.

Technical Context

The SFT15G is a single-die, planar junction super fast recovery rectifier optimized for high-frequency switching applications. Its 35 ns reverse recovery time and low 1.30 V forward voltage at 1 A enable reduced switching losses and improved efficiency in SMPS output stages.

Rated for 300 V V_RRM and 30 A non-repetitive surge current (8.3 ms half-sine), it operates across –55 °C to +150 °C junction temperature range with 100 °C/W junction-to-ambient thermal resistance - suitable for compact, thermally constrained industrial and automotive-grade power supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	300 V - maximum blocking voltage in reverse bias; defines usable input/output voltage range in DC-DC converters
I_F	1 A continuous - steady-state forward current rating; sets maximum average load current capability
t_rr	35 ns - measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables operation up to ~3 MHz switching frequency
V_F	1.30 V @ 1 A, 25 °C - forward conduction loss directly impacts conduction efficiency and thermal design
C_J	10 pF @ 1 MHz, 4 V - low junction capacitance minimizes capacitive switching loss and EMI generation
R_θJA	100 °C/W - thermal resistance determines required heatsinking or PCB copper area for 1 A continuous operation

Pinout & Package

TS-1 package: surface-mount, single-ended anode-cathode configuration with cathode band marking; lead-free, RoHS-compliant, pure tin-plated leads; UL 94V-0 molding compound; 0.200 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node or ground return) in freewheeling path
Cathode	Forward current exit point	Connected to higher-potential node (e.g., output rail); marked by visible band on device body

Key Features

Feature	Design Value
Super fast recovery	t_rr = 35 ns enables high-frequency (>500 kHz) switching with minimal reverse recovery loss
Low forward voltage	V_F = 1.30 V @ 1 A reduces conduction loss and improves system efficiency at light-to-moderate loads
High surge robustness	I_FSM = 30 A (8.3 ms) supports transient overload conditions without failure
AEC-Q101 qualified option	SFT15GH variant available - meets stress test requirements for automotive under-hood applications

Applications

DC-DC Converter Output Rectification	Switching Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current path during transformer reset phase; conducts only when secondary winding voltage exceeds output rail. Use Value: 35 ns t_rr and 1.30 V V_F minimize switching loss and improve full-load efficiency by ≥0.8% vs. standard fast rectifiers.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during PWM off-time to maintain current continuity. Use Value: 30 A I_FSM withstands motor startup surges; 100 °C/W R_θJA allows direct PCB mounting without heatsink in <1 W dissipation designs.
Automotive Body Control Module Power Supply	Industrial PLC Digital Output Stage
Use Scenario: 12 V input-to-5 V/3.3 V step-down supply in BCMs requiring AEC-Q101 compliance. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant buck-derived topologies. Use Value: SFT15GH variant satisfies automotive qualification; 300 V V_RRM provides margin against load dump transients up to 28 V nominal systems.	Use Scenario: Isolated 24 V DC output stage driving relay coils or indicator LEDs in programmable logic controllers. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback from switched 24 V loads. Use Value: 10 pF C_J limits capacitive coupling of fast edges into control logic; RoHS/halogen-free construction meets industrial environmental standards.

DC-DC Converter Output Rectification

Switching Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A.

IC Role / Device Role / Timing Role: Unidirectional current path during transformer reset phase; conducts only when secondary winding voltage exceeds output rail.

Use Value: 35 ns t_rr and 1.30 V V_F minimize switching loss and improve full-load efficiency by ≥0.8% vs. standard fast rectifiers.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in H-bridge inverters.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during PWM off-time to maintain current continuity.

Use Value: 30 A I_FSM withstands motor startup surges; 100 °C/W R_θJA allows direct PCB mounting without heatsink in <1 W dissipation designs.

Automotive Body Control Module Power Supply

Industrial PLC Digital Output Stage

Use Scenario: 12 V input-to-5 V/3.3 V step-down supply in BCMs requiring AEC-Q101 compliance.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant buck-derived topologies.

Use Value: SFT15GH variant satisfies automotive qualification; 300 V V_RRM provides margin against load dump transients up to 28 V nominal systems.

Use Scenario: Isolated 24 V DC output stage driving relay coils or indicator LEDs in programmable logic controllers.

IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback from switched 24 V loads.

Use Value: 10 pF C_J limits capacitive coupling of fast edges into control logic; RoHS/halogen-free construction meets industrial environmental standards.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R03S	V_RRM = 300 V, t_rr = 25 ns, V_F = 1.15 V @ 1 A - faster recovery but lower surge rating (I_FSM = 20 A)	Better for >1 MHz switching; less robust under repetitive surge stress	Select STTH1R03S where speed dominates over surge margin; verify layout thermal relief for 1.15 V V_F drop
ES1D-E3/54	V_RRM = 200 V, t_rr = 35 ns, V_F = 1.7 V @ 1 A - lower voltage rating, higher V_F, same package (DO-214AC)	Not suitable for 300 V bus applications; higher conduction loss increases thermal load	Use ES1D-E3/54 only in ≤200 V systems where cost sensitivity outweighs efficiency loss

Compared with STTH1R03S and ES1D-E3/54, the SFT15G delivers balanced performance: 300 V rating and 30 A surge capability exceed ES1D-E3/54, while its 1.30 V V_F and 100 °C/W thermal resistance support simpler thermal design than STTH1R03S's tighter layout constraints.

Availability

SFT15G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching inverter freewheeling, and automotive body control module power supplies requiring stable component supply and long-term industrial availability.

Supply support for SFT15G 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 SFT15G belongs to TSC's SFT1xG super fast rectifier family, designed specifically for high-frequency, high-efficiency power conversion in space-constrained and thermally demanding applications.

FAQ

What is the maximum repetitive peak reverse voltage rating for SFT15G?

The SFT15G has a maximum repetitive peak reverse voltage (V_RRM) of 300 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version J2104). This rating defines the highest reverse-biased voltage the device can block continuously without breakdown and is critical for selecting appropriate input/output voltage margins in DC-DC and inverter designs using the SFT15G.

What is the forward voltage drop of SFT15G at rated current?

The SFT15G exhibits a typical forward voltage (V_F) of 1.30 V at 1 A forward current and 25 °C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction loss and thermal design - for example, at 1 A DC, the SFT15G dissipates approximately 1.30 W, requiring attention to PCB copper area or ambient temperature limits.

Does SFT15G have automotive qualification?

The base SFT15G is not AEC-Q101 qualified; however, the SFT15GH variant - identical electrically and mechanically but subjected to additional stress testing - is AEC-Q101 qualified. The "H" suffix denotes qualification, and this version is explicitly listed in the Ordering Information section of the Taiwan Semiconductor datasheet for automotive under-hood and body electronics applications requiring reliability validation.

What is the reverse recovery time specification for SFT15G?

The SFT15G 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 parameter is specified in the Electrical Specifications table and confirms the device's suitability for high-frequency switching applications up to several megahertz, where fast recovery minimizes switching loss and EMI generation in circuits using the SFT15G.

What package type does SFT15G use and what are its key mechanical features?

The SFT15G uses the TS-1 surface-mount package - a compact, single-ended outline with cathode band polarity marking. Key mechanical features include UL 94V-0 flammability-rated molding compound, pure tin-plated leads compliant with J-STD-002 solderability, JESD 201 Class 2 whisker resistance, and a typical weight of 0.200 g. These attributes ensure reliable automated assembly and long-term reliability in industrial and automotive environments using the SFT15G.

SFT15G A1G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: T-18, Axial

Packaging:: Tape & Box (TB)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 300 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 300 V

Capacitance @ Vr, F:: 10pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TS-1

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

SFT15G A1G FAQ

1.How can I place an order for SFT15G A1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFT15G A1G 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 SFT15G A1G reliable?

The price and inventory of SFT15G A1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFT15G A1G is usually 5 days.

3.What payment methods are accepted for SFT15G A1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFT15G A1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFT15G A1G?

SFT15G A1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFT15G A1G 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 SFT15G A1G?

For technical support, including SFT15G A1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFT15G A1G requirements.

6.How does Aetrix verify that SFT15G A1G is sourced from the original manufacturer or authorized distributors?

All SFT15G A1G 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 SFT15G A1G meets industry standards.

7.What is the process for return or replacement of SFT15G A1G?

All SFT15G A1G units undergo pre-shipment inspection (PSI). If there is an issue with SFT15G A1G, 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 SFT15G A1G part is unused and in its original packaging.

Return procedure for SFT15G A1G:

1.Submit a request within 90 days.

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

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