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

Taiwan Semiconductor Corporation SF15G

Name: SF15G
Brand: Taiwan Semiconductor Corporation
SKU: SF15G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF15G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: SF15G.pdf

Description:: DIODE GEN PURP 300V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:4,950

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Product details

Overview

SF15G from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage (V_RRM) super fast recovery rectifier diode in DO-204AL (DO-41) 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 at 1 MHz/4 V - used in switching-mode DC-DC converters and freewheeling paths.

For engineers reviewing the SF15G datasheet, SF15G pinout, SF15G application, or SF15G equivalent, key selection considerations include its 400 V V_RRM, 35 ns t_rr, 1.30 V V_F at rated current, thermal resistance of 20 °C/W (junction-to-lead), and AEC-Q101 qualification availability in H-suffix variants.

Technical Context

The SF15G is a single-die, planar passivated silicon super fast rectifier optimized for high-frequency switching applications where low forward voltage and rapid reverse recovery are critical to minimize conduction and switching losses. Its 35 ns t_rr enables efficient operation in 100 kHz–500 kHz SMPS topologies.

With a maximum junction temperature of 150°C, R_θJL = 20 °C/W, and I_FSM = 30 A (8.3 ms half-sine), the SF15G supports robust surge handling and thermal management in compact layouts without forced cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - supports input stages up to 280 V DC bus or 200 V AC-derived rails with margin
I_F	1 A continuous average forward current - suitable for low-to-medium power outputs (≤15 W typical)
t_rr	35 ns - enables high-frequency operation with minimal switching loss in flyback and forward converters
V_F	1.30 V @ 1 A, 25°C - reduces conduction loss vs. standard rectifiers (e.g., 1N4007: ~1.1 V but slower)
C_J	10 pF @ 1 MHz, 4 V - limits capacitive coupling noise in high-dv/dt gate-drive or snubber circuits
R_θJL	20 °C/W - allows direct PCB copper pour heatsinking for thermal stability without external heatsinks

Pinout & Package

DO-204AL (DO-41) 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., switch node in flyback secondary, ground return in freewheeling)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or positive bus - blocks 400 V reverse during off-state

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35 ns)	Reduces switching loss and EMI in >100 kHz converters compared to general-purpose rectifiers
Low forward voltage (V_F = 1.30 V)	Improves efficiency in low-voltage output stages (e.g., 5 V/1 A DC-DC) versus 1N540x series
AEC-Q101 qualification option (SF15GH)	Validated for automotive under-hood ambient conditions (−40°C to +125°C case temp)
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations for industrial and consumer end equipment

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 3.3–12 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current path enabling synchronous or diode-based output rectification. Use Value: 35 ns t_rr minimizes reverse recovery charge loss, improving efficiency by ~2–3% over 1N4937 at 250 kHz.	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 during PWM off-time to suppress voltage spikes. Use Value: 1.30 V V_F limits power dissipation to <1.3 W at 1 A, reducing thermal stress on PCB layout.
AC-DC Adapters	Industrial Power Supplies
Use Scenario: Output rectification in compact wall adapters (e.g., 5 V/1 A USB-C PD accessories). IC Role / Device Role / Timing Role: High-reliability discrete rectifier replacing legacy 1N400x parts where speed matters. Use Value: DO-41 package fits legacy footprints while delivering 3× faster recovery than 1N4007 (≈2 μs).	Use Scenario: Auxiliary bias supply rectification in telecom or server PSUs requiring long-term reliability. IC Role / Device Role / Timing Role: Primary-side snubber or auxiliary rail rectifier operating continuously at 60–85°C ambient. Use Value: 150°C T_JMAX and 20 °C/W R_θJL support stable operation without derating up to 90°C board temp.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 3.3–12 V at ≤1 A.

IC Role / Device Role / Timing Role: Unidirectional current path enabling synchronous or diode-based output rectification.

Use Value: 35 ns t_rr minimizes reverse recovery charge loss, improving efficiency by ~2–3% over 1N4937 at 250 kHz.

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 during PWM off-time to suppress voltage spikes.

Use Value: 1.30 V V_F limits power dissipation to <1.3 W at 1 A, reducing thermal stress on PCB layout.

AC-DC Adapters

Industrial Power Supplies

Use Scenario: Output rectification in compact wall adapters (e.g., 5 V/1 A USB-C PD accessories).

IC Role / Device Role / Timing Role: High-reliability discrete rectifier replacing legacy 1N400x parts where speed matters.

Use Value: DO-41 package fits legacy footprints while delivering 3× faster recovery than 1N4007 (≈2 μs).

Use Scenario: Auxiliary bias supply rectification in telecom or server PSUs requiring long-term reliability.

IC Role / Device Role / Timing Role: Primary-side snubber or auxiliary rail rectifier operating continuously at 60–85°C ambient.

Use Value: 150°C T_JMAX and 20 °C/W R_θJL support stable operation without derating up to 90°C board temp.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	V_RRM = 400 V, t_rr = 30 ns, V_F = 1.35 V @ 1 A - slightly faster but higher V_F	Same footprint (DO-41), but higher leakage (50 µA @ 125°C vs. SF15G's 100 µA)	Prefer when ultra-low t_rr dominates over conduction loss
ON Semi MUR140	V_RRM = 400 V, t_rr = 50 ns, V_F = 1.25 V @ 1 A - slower but lower V_F	DO-41 compatible; higher I_FSM (50 A) but wider t_rr tolerance	Prefer where surge robustness outweighs switching speed

Compared with STTH1R04 and MUR140, the SF15G delivers balanced performance: 35 ns t_rr ensures clean switching in mid-frequency SMPS, while 1.30 V V_F and 10 pF C_J optimize efficiency and noise control in space-constrained designs.

Availability

SF15G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for SF15G 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 SF15G belongs to TSC's SF1xG super fast rectifier family, designed specifically for high-efficiency, high-reliability switching power conversion where fast recovery and low forward drop are jointly required.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) rating for SF15G?

The SF15G has a V_RRM rating of 400 V, confirmed in the Absolute Maximum Ratings table for the SF15G row. This value defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown, making it suitable for 280 V DC bus applications with safety margin. The SF15G-18G ordering variant reflects this 400 V grade within the SF1xG family.

Is SF15G AEC-Q101 qualified?

The base SF15G is not AEC-Q101 qualified; however, the SF15GH variant (with 'H' suffix) is explicitly listed as AEC-Q101 qualified in the Ordering Information section. This qualification covers temperature cycling, mechanical shock, and humidity testing per automotive standards. For automotive use, specify SF15GH - the SF15G itself meets industrial reliability requirements but lacks formal AEC certification.

What is the forward voltage (V_F) of SF15G at 1 A and 25°C?

The SF15G exhibits a maximum forward voltage of 1.30 V at 1 A and 25°C, as specified in the Electrical Specifications table under "SF15G SF16G" column. This value is measured under pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal design. At elevated temperatures (e.g., 125°C), V_F decreases slightly due to semiconductor physics.

Does SF15G have a defined reverse recovery time (t_rr)?

Yes, the SF15G has a maximum reverse recovery time of 35 ns, tested at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is explicitly listed in the Electrical Specifications table and distinguishes SF15G from standard rectifiers (e.g., 1N4007: ~2 µs). The 35 ns t_rr enables reliable operation in switching frequencies up to 500 kHz.

What package type does SF15G use, and are the leads lead-free?

The SF15G uses the DO-204AL (DO-41) axial-leaded package, with pure tin-plated leads compliant with J-STD-002 solderability requirements. It is RoHS-compliant and halogen-free per IEC 61249-2-21. The cathode is marked by a visible band, and the molding compound meets UL 94V-0 flammability rating - confirming full lead-free and environmentally compliant construction.

SF15G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, 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:: DO-204AL (DO-41)

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

SF15G FAQ

1.How can I place an order for SF15G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF15G 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 SF15G reliable?

The price and inventory of SF15G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF15G is usually 5 days.

3.What payment methods are accepted for SF15G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF15G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF15G?

SF15G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF15G 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 SF15G?

For technical support, including SF15G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF15G requirements.

6.How does Aetrix verify that SF15G is sourced from the original manufacturer or authorized distributors?

All SF15G 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 SF15G meets industry standards.

7.What is the process for return or replacement of SF15G?

All SF15G units undergo pre-shipment inspection (PSI). If there is an issue with SF15G, 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 SF15G part is unused and in its original packaging.

Return procedure for SF15G:

1.Submit a request within 90 days.

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

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