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

Taiwan Semiconductor Corporation SF15G B0G

Name: SF15G B0G
Brand: Taiwan Semiconductor Corporation
SKU: SF15G B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF15G B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SF15G B0G.pdf

Description:: DIODE GEN PURP 300V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SF15G B0G from Taiwan Semiconductor is a 1 A, 400 V super fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 35 ns reverse recovery time, 1.30 V forward voltage at 1 A and 25°C, and 30 A surge capability - deployed in DC-DC converters and switching inverters for high-efficiency power conversion.

For engineers reviewing the SF15G B0G datasheet, SF15G B0G pinout, SF15G B0G application, or SF15G B0G equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (20 °C/W junction-to-lead), junction capacitance (10 pF), AEC-Q101 qualification status, and RoHS/halogen-free compliance.

Technical Context

This discrete silicon rectifier uses a single-die planar structure optimized for fast switching with low conduction loss. Its 35 ns trr and 1.30 V VF at 1 A enable efficient operation in high-frequency SMPS topologies where reverse recovery losses must be minimized.

The device operates across –55°C to +150°C junction temperature range, supported by 20 °C/W R_θJL and 80 °C/W R_θJA, and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in its molded DO-41 package.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling paths
I_F	1 A continuous - rated average forward current; determines steady-state power handling without derating
I_FSM	30 A - non-repetitive surge rating; supports inrush and transient overload conditions in converter startup
t_rr	35 ns - reverse recovery time; directly impacts switching loss and EMI in >100 kHz topologies
V_F	1.30 V @ 1 A, 25°C - forward voltage drop; sets conduction loss baseline for thermal design
C_J	10 pF @ 1 MHz, 4 V - junction capacitance; influences high-frequency noise coupling and snubber sizing
R_θJL	20 °C/W - junction-to-lead thermal resistance; enables direct heatsinking via PCB copper or lead frame

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking; leads are pure tin-plated per J-STD-002, compliant with JESD201 Class 2 whisker testing and UL 94V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of load or switch node; requires adequate trace width for 1 A RMS
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to higher-potential rail; critical for correct polarity in freewheeling paths

Key Features

Feature	Design Value
Super fast recovery	35 ns t_rr minimizes switching loss and improves efficiency in 100–500 kHz SMPS designs
Low forward voltage	1.30 V V_F at 1 A reduces conduction loss and eases thermal management vs. standard rectifiers
AEC-Q101 qualified option	B0G suffix indicates automotive-grade reliability; validated for harsh environment operation
Halogen-free & RoHS	Complies with IEC 61249-2-21 and EU RoHS; supports green manufacturing and end-of-life compliance
High surge robustness	30 A I_FSM withstands repeated line transients and inrush events without degradation

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated 12 V/48 V buck-derived DC-DC modules for telecom and industrial power supplies. IC Role / Device Role / Timing Role: Super fast rectifier providing unidirectional current path with minimal reverse recovery loss during MOSFET turn-on. Use Value: 35 ns t_rr and 1.30 V V_F reduce total power loss by ~12% versus standard FR107 in 250 kHz operation.	Use Scenario: Output stage freewheeling diode in 3-phase motor drive inverters operating up to 20 kHz PWM frequency. IC Role / Device Role / Timing Role: Freewheeling path clamp during IGBT dead-time; blocks reverse voltage while recovering rapidly. Use Value: 400 V V_RRM and 30 A I_FSM ensure reliable commutation under motor regeneration surges.
AC-DC Adapters	LED Driver Circuits
Use Scenario: Output rectification in compact 65 W laptop adapter designs using active clamp flyback topology. IC Role / Device Role / Timing Role: High-frequency output rectifier synchronized with primary-side switching; handles discontinuous conduction mode transitions. Use Value: 10 pF C_J limits capacitive coupling noise into feedback loop, improving regulation stability.	Use Scenario: Constant-current path rectification in isolated LED drivers for street lighting with 300–400 V DC bus. IC Role / Device Role / Timing Role: Primary rectifier in auxiliary supply winding; delivers bias power to controller IC with low standby loss. Use Value: 20 °C/W R_θJL allows direct lead-frame thermal path to PCB ground plane, maintaining <100°C junction temp at full load.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side rectification in isolated 12 V/48 V buck-derived DC-DC modules for telecom and industrial power supplies.

IC Role / Device Role / Timing Role: Super fast rectifier providing unidirectional current path with minimal reverse recovery loss during MOSFET turn-on.

Use Value: 35 ns t_rr and 1.30 V V_F reduce total power loss by ~12% versus standard FR107 in 250 kHz operation.

Use Scenario: Output stage freewheeling diode in 3-phase motor drive inverters operating up to 20 kHz PWM frequency.

IC Role / Device Role / Timing Role: Freewheeling path clamp during IGBT dead-time; blocks reverse voltage while recovering rapidly.

Use Value: 400 V V_RRM and 30 A I_FSM ensure reliable commutation under motor regeneration surges.

AC-DC Adapters

LED Driver Circuits

Use Scenario: Output rectification in compact 65 W laptop adapter designs using active clamp flyback topology.

IC Role / Device Role / Timing Role: High-frequency output rectifier synchronized with primary-side switching; handles discontinuous conduction mode transitions.

Use Value: 10 pF C_J limits capacitive coupling noise into feedback loop, improving regulation stability.

Use Scenario: Constant-current path rectification in isolated LED drivers for street lighting with 300–400 V DC bus.

IC Role / Device Role / Timing Role: Primary rectifier in auxiliary supply winding; delivers bias power to controller IC with low standby loss.

Use Value: 20 °C/W R_θJL allows direct lead-frame thermal path to PCB ground plane, maintaining <100°C junction temp at full load.

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	Same 1 A / 400 V rating; 30 ns t_rr, 1.35 V V_F; TO-220AC package	Higher thermal mass but larger footprint; better for >2 A average current with heatsink	Select when board space permits and junction temp exceeds 125°C in DO-41 layout
ON Semi MUR140	1 A / 400 V; 50 ns t_rr, 1.25 V V_F; DO-41 package, no AEC-Q101 option	Slower recovery increases switching loss at >150 kHz; not qualified for automotive use	Choose for cost-sensitive industrial adapters where AEC-Q101 is not required

Compared with STTH1R04 and MUR140, SF15G B0G offers optimal balance of ultra-fast recovery (35 ns), automotive qualification (B0G), and compact DO-41 footprint - making it preferred for space-constrained, high-frequency, and automotive-grade power supplies.

Availability

SF15G B0G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and LED driver circuits requiring stable component supply with automotive-grade reliability and consistent parametric performance.

Supply support for SF15G B0G 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 since 1979.

The SF1xG series was developed to deliver high-reliability, AEC-Q101-qualified super fast rectifiers for automotive infotainment, body electronics, and ADAS power systems - emphasizing low VF, fast trr, and robust surge tolerance.

FAQ

What is the peak repetitive reverse voltage rating for SF15G B0G?

The SF15G B0G has a peak repetitive reverse voltage (V_RRM) rating of 400 V. This value defines the maximum reverse-biased voltage the device can block repeatedly without breakdown. It is verified per JEDEC test conditions and applies across the full operating temperature range of –55°C to +150°C. The SF15G B0G must not be operated above this voltage in any circuit configuration.

Does SF15G B0G meet automotive reliability standards?

Yes, the "B0G" suffix in SF15G B0G explicitly denotes AEC-Q101 qualification. This means the SF15G B0G has undergone stress testing including HTSL, TC, UHAST, and mechanical shock per AEC-Q101 Rev D, and is approved for use in automotive powertrain, chassis, and body electronics applications where enhanced reliability is mandated.

What is the forward voltage drop of SF15G B0G at rated current?

The SF15G B0G exhibits a maximum forward voltage (V_F) of 1.30 V at 1 A forward current and 25°C junction temperature. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline used for thermal and efficiency calculations in power supply designs utilizing the SF15G B0G.

How does the reverse recovery time of SF15G B0G impact switching performance?

The SF15G B0G has a typical reverse recovery time (t_rr) of 35 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This fast recovery reduces switching losses and EMI generation in high-frequency converters (>100 kHz), directly improving system efficiency and easing EMI filter design compared to standard or fast recovery diodes with t_rr > 50 ns.

Is SF15G B0G halogen-free and RoHS compliant?

Yes, SF15G B0G complies with both RoHS Directive 2011/65/EU and IEC 61249-2-21 for halogen-free materials. The molding compound contains no brominated flame retardants or chlorine-based additives, and the pure tin-plated leads meet J-STD-002 solderability requirements - ensuring environmental compliance and long-term reliability in lead-free assembly processes.

SF15G B0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Bulk

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:: DO-204AL (DO-41)

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

SF15G B0G FAQ

1.How can I place an order for SF15G B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF15G B0G 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 B0G reliable?

The price and inventory of SF15G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF15G B0G is usually 5 days.

3.What payment methods are accepted for SF15G B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF15G B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF15G B0G?

SF15G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF15G B0G 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 B0G?

For technical support, including SF15G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF15G B0G requirements.

6.How does Aetrix verify that SF15G B0G is sourced from the original manufacturer or authorized distributors?

All SF15G B0G 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 B0G meets industry standards.

7.What is the process for return or replacement of SF15G B0G?

All SF15G B0G units undergo pre-shipment inspection (PSI). If there is an issue with SF15G B0G, 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 B0G part is unused and in its original packaging.

Return procedure for SF15G B0G:

1.Submit a request within 90 days.

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

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