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

Taiwan Semiconductor Corporation SFT15G

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

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Part No.:: SFT15G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: T-18, Axial

Datasheet:: SFT15G.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SFT15G from Taiwan Semiconductor is a 1 A, 300 V repetitive peak reverse voltage (V_RRM) super fast rectifier diode in TS-1 package, featuring 35 ns reverse recovery time (t_rr), 1.30 V forward voltage at 1 A and 25°C, and 10 pF junction capacitance - used for freewheeling and 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, t_rr ≤ 35 ns, I_F = 1 A continuous, thermal resistance R_θJA = 100 °C/W, and TS-1 surface-mount compatibility with J-STD-002 solderability.

Technical Context

The SFT15G is a single-die, planar epitaxial super fast recovery rectifier optimized for high-frequency switching applications. Its 35 ns reverse recovery time and low 10 pF junction capacitance minimize switching losses in SMPS output stages and freewheeling paths.

It operates across –55°C to +150°C junction temperature range with 30 A surge capability (8.3 ms half-sine) and is rated for 300 V repetitive reverse voltage - matching mid-range voltage requirements between SFT14G (200 V) and SFT16G (400 V) in the same family.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	300 V - supports DC-DC converters with up to 300 V input or output clamping
I_F	1 A continuous - suitable for low-to-medium power output rectification
t_rr	35 ns - enables efficient operation at 100–500 kHz switching frequencies
V_F	1.30 V @ 1 A, 25°C - balances conduction loss and thermal rise in compact layouts
C_J	10 pF @ 1 MHz, 4 V - reduces high-frequency noise coupling in snubberless designs
R_θJA	100 °C/W - requires minimal PCB copper area for thermal management at full load
I_FSM	30 A (8.3 ms) - withstands transient inrush during startup or fault conditions

Pinout & Package

TS-1 package: surface-mount, single-anode/single-cathode configuration with cathode band marking; lead-free, pure tin-plated terminals compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current entry point	Connected to switch node or transformer secondary in flyback/forward topologies
Cathode	Output current exit point	Connected to output capacitor and load; polarity marked by visible band on case

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35 ns)	Reduces switching loss and EMI in high-frequency SMPS without external snubbers
Low junction capacitance (10 pF)	Minimizes capacitive feedthrough and improves transient response in feedback-sensitive outputs
100 °C/W thermal resistance	Enables use on standard FR-4 with 25 mm² copper pad for full 1 A derating to 75°C ambient
AEC-Q101 qualified option (SFT15GH)	Validated for automotive under-hood applications requiring reliability beyond industrial grade
RoHS & halogen-free (IEC 61249-2-21)	Complies with global environmental regulations without compromising thermal or electrical performance

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 24–48 V input DC-DC converters delivering up to 12 V/1 A output. IC Role / Device Role / Timing Role: Unidirectional current path with fast turn-off to prevent cross-conduction in synchronous or quasi-resonant topologies. Use Value: 35 ns t_rr and 1.30 V V_F jointly reduce total power loss to < 1.4 W at full load, easing thermal design.	Use Scenario: Freewheeling path in half-bridge motor drive inverters operating at 20–100 kHz PWM frequency. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during MOSFET off-time, suppressing voltage spikes across switching devices. Use Value: 30 A I_FSM handles motor inductive kickback surges; 10 pF C_J limits dv/dt-induced false triggering.
Industrial Power Supply Hold-up	LED Driver Secondary Rectification
Use Scenario: Output rectifier in 300 V-rated auxiliary supplies powering control circuitry in PLCs and HMIs. IC Role / Device Role / Timing Role: Maintains regulated output during brief AC line dips by sustaining conduction through energy stored in bulk capacitors. Use Value: 300 V V_RRM ensures margin over 230 VAC-derived 325 VDC rails; 150°C T_JMAX supports sealed enclosure operation.	Use Scenario: Low-noise rectification stage in constant-current LED drivers for architectural lighting (24–48 V output). IC Role / Device Role / Timing Role: Converts high-frequency transformer output to stable DC while minimizing conducted EMI into LED strings. Use Value: 10 pF C_J and 35 ns t_rr suppress high-frequency ringing that causes audible noise and LED current ripple.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 24–48 V input DC-DC converters delivering up to 12 V/1 A output.

IC Role / Device Role / Timing Role: Unidirectional current path with fast turn-off to prevent cross-conduction in synchronous or quasi-resonant topologies.

Use Value: 35 ns t_rr and 1.30 V V_F jointly reduce total power loss to < 1.4 W at full load, easing thermal design.

Use Scenario: Freewheeling path in half-bridge motor drive inverters operating at 20–100 kHz PWM frequency.

IC Role / Device Role / Timing Role: Provides low-loss recirculation path during MOSFET off-time, suppressing voltage spikes across switching devices.

Use Value: 30 A I_FSM handles motor inductive kickback surges; 10 pF C_J limits dv/dt-induced false triggering.

Industrial Power Supply Hold-up

LED Driver Secondary Rectification

Use Scenario: Output rectifier in 300 V-rated auxiliary supplies powering control circuitry in PLCs and HMIs.

IC Role / Device Role / Timing Role: Maintains regulated output during brief AC line dips by sustaining conduction through energy stored in bulk capacitors.

Use Value: 300 V V_RRM ensures margin over 230 VAC-derived 325 VDC rails; 150°C T_JMAX supports sealed enclosure operation.

Use Scenario: Low-noise rectification stage in constant-current LED drivers for architectural lighting (24–48 V output).

IC Role / Device Role / Timing Role: Converts high-frequency transformer output to stable DC while minimizing conducted EMI into LED strings.

Use Value: 10 pF C_J and 35 ns t_rr suppress high-frequency ringing that causes audible noise and LED current ripple.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-1EWH03-M3/5AT	V_RRM = 300 V, t_rr = 30 ns, V_F = 1.25 V @ 1 A - slightly faster and lower VF	Same TS-1 footprint but tighter t_rr tolerance; better for >300 kHz designs	Preferred when minimizing switching loss is critical and layout allows tighter thermal margin
ON Semiconductor MUR130	V_RRM = 300 V, t_rr = 50 ns, V_F = 1.35 V @ 1 A - slower recovery, higher VF	TO-220AC package; requires heatsink for 1 A continuous; not surface-mount compatible	Select only if through-hole assembly is mandated and board space permits larger footprint

Compared with VS-1EWH03-M3/5AT and MUR130, the SFT15G offers optimal balance of speed (35 ns), surface-mount fit (TS-1), and thermal efficiency (100 °C/W) for space-constrained 1 A SMPS outputs - neither the fastest nor lowest-VF, but best overall integration for mid-frequency industrial converters.

Availability

SFT15G 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 manufacturing.

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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.

The SFT15G belongs to TSC's SFT1xG super fast rectifier product line, engineered specifically for high-efficiency, high-reliability switching power supplies where fast recovery, low forward drop, and robust surge handling are essential.

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 voltage the device can block repeatedly without breakdown under normal operating conditions and provides safe margin for 230 VAC-derived 325 VDC bus applications.

Does SFT15G have AEC-Q101 qualification?

The base SFT15G is not AEC-Q101 qualified; however, the variant SFT15GH is explicitly listed in the Ordering Information section as AEC-Q101 qualified. The "H" suffix denotes automotive-grade qualification, including stress testing per AEC-Q101 standards, while maintaining identical electrical specs and TS-1 packaging as the SFT15G.

What is the forward voltage drop of SFT15G at 1 A and 25°C?

The forward voltage (V_F) of the SFT15G is 1.30 V maximum 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 represents the upper limit for conduction loss calculation in thermal and efficiency modeling of the SFT15G.

What package type does SFT15G use, and what are its mounting features?

The SFT15G uses the TS-1 surface-mount package - a compact, gull-wing leaded outline with pure tin-plated terminals. It meets J-STD-002 solderability requirements, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance, enabling reliable reflow soldering on standard PCBs without lead-free process modifications.

How does the reverse recovery time of SFT15G compare to other devices in the SFT1xG family?

The SFT15G shares the same 35 ns maximum reverse recovery time (t_rr) as SFT16G, SFT17G, and SFT18G, while SFT11G–SFT14G are rated at 35 ns maximum only up to their respective voltage grades. All SFT1xG devices specify t_rr ≤ 35 ns under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A test conditions, confirming consistent fast-recovery performance across the 50–600 V family.

SFT15G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: T-18, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

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 FAQ

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

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

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

3.What payment methods are accepted for SFT15G?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFT15G?

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

Once your SFT15G 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?

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

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

All SFT15G 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 meets industry standards.

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

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

Return procedure for SFT15G:

1.Submit a request within 90 days.

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

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