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

Taiwan Semiconductor Corporation SF47G R0G

Name: SF47G R0G
Brand: Taiwan Semiconductor Corporation
SKU: SF47G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF47G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF47G R0G.pdf

Description:: DIODE GEN PURP 500V 4A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:9,299

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Product details

Overview

SF47G from Taiwan Semiconductor is a 500V, 4A super fast recovery rectifier diode in DO-201AD package, featuring 1.7V forward voltage at 4A and 35ns reverse recovery time; used in high-frequency switching mode power supplies for freewheeling and output rectification.

For engineers reviewing the SF47G datasheet, SF47G pinout, SF47G application, or SF47G equivalent, key selection criteria include V_RRM = 500V, I_F = 4A, t_rr = 35ns, V_F = 1.7V @ 4A, and DO-201AD thermal performance (R_θJA = 25°C/W).

Technical Context

This single-die silicon rectifier operates with a maximum junction temperature of 150°C and supports repetitive peak reverse voltages up to 500V. Its 35ns reverse recovery time enables efficient operation in DC–DC converters and SMPS operating above 50kHz.

The device exhibits low junction capacitance (80pF @ 1MHz, 4V), enabling reduced switching losses in high-frequency topologies. With 125A non-repetitive surge capability and RoHS/halogen-free compliance, it meets automotive-grade reliability requirements when AEC-Q101 qualified variants are selected.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	500 V - Maximum blocking voltage in reverse bias; defines usable input/output voltage range in buck, boost, and flyback designs
I_F	4 A - Continuous average forward current; sets minimum heatsinking requirement for steady-state conduction
t_rr	35 ns - Reverse recovery time; determines minimum dead-time setting and switching loss in synchronous rectification
V_F	1.7 V @ 4A, 25°C - Forward voltage drop; directly impacts conduction loss and thermal design in high-duty-cycle applications
R_θJA	25 °C/W - Junction-to-ambient thermal resistance; enables estimation of junction temperature rise under natural convection
C_J	80 pF @ 1MHz, 4V - Junction capacitance; influences EMI generation and snubber sizing in high-frequency switching nodes

Pinout & Package

DO-201AD 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	Connected to lower-potential node (e.g., switch node in boost, transformer secondary in flyback)
Cathode	Forward current exit / polarity reference	Marked by band; connects to output rail or filter capacitor positive terminal

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35ns)	Enables >100kHz switching without excessive turn-off loss or voltage overshoot in hard-switched topologies
Low V_F = 1.7V @ 4A	Reduces conduction loss by ~15% vs. standard FRDs with V_F ≥ 2.0V at same current and temperature
DO-201AD package with R_θJA = 25°C/W	Supports 4A continuous operation on 1-in² copper area without forced airflow
125A I_FSM (8.3ms sine)	Withstands inrush and transient overloads typical in AC-input rectification and motor drive freewheeling

Applications

DC–DC Converter Output Rectification	Switch-Mode Power Supply Freewheeling
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters delivering up to 48W. IC Role / Device Role / Timing Role: Unidirectional current path during low-side switch conduction; blocks reverse voltage during high-side switch active period. Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by 0.8–1.2% at 200kHz.	Use Scenario: Freewheeling path across inductive loads in 24V industrial motor drivers with PWM frequencies up to 150kHz. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when main power switch turns off, clamping inductive kickback. Use Value: 1.7V V_F reduces freewheeling conduction loss versus standard rectifiers, lowering MOSFET stress and heat sink size.
AC–DC Adapter Secondary Rectification	High-Frequency Inverter Output Stage
Use Scenario: Output rectification in compact 65W laptop adapters using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Conducts during transformer demagnetization phase; blocks reflected primary voltage during reset. Use Value: 500V V_RRM provides 2× safety margin over 264VAC input reflected peaks, ensuring long-term reliability.	Use Scenario: Output stage in 1kW solar microinverter H-bridge, handling 50kHz PWM with bidirectional current reversal. IC Role / Device Role / Timing Role: Acts as unidirectional clamp in half-bridge leg; suppresses voltage spikes during dead-time transitions. Use Value: 80pF C_J limits capacitive coupling noise into gate drivers, reducing false triggering risk in high dv/dt environments.

DC–DC Converter Output Rectification

Switch-Mode Power Supply Freewheeling

Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters delivering up to 48W.

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

Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by 0.8–1.2% at 200kHz.

Use Scenario: Freewheeling path across inductive loads in 24V industrial motor drivers with PWM frequencies up to 150kHz.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when main power switch turns off, clamping inductive kickback.

Use Value: 1.7V V_F reduces freewheeling conduction loss versus standard rectifiers, lowering MOSFET stress and heat sink size.

AC–DC Adapter Secondary Rectification

High-Frequency Inverter Output Stage

Use Scenario: Output rectification in compact 65W laptop adapters using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: Conducts during transformer demagnetization phase; blocks reflected primary voltage during reset.

Use Value: 500V V_RRM provides 2× safety margin over 264VAC input reflected peaks, ensuring long-term reliability.

Use Scenario: Output stage in 1kW solar microinverter H-bridge, handling 50kHz PWM with bidirectional current reversal.

IC Role / Device Role / Timing Role: Acts as unidirectional clamp in half-bridge leg; suppresses voltage spikes during dead-time transitions.

Use Value: 80pF C_J limits capacitive coupling noise into gate drivers, reducing false triggering risk in high dv/dt environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06D	V_RRM = 600V, t_rr = 30ns, V_F = 1.7V @ 4A, DO-201AD	Higher V_RRM margin; slightly faster recovery but identical thermal profile	Select when system requires >500V blocking or tighter t_rr tolerance
ON Semi MUR460	V_RRM = 600V, t_rr = 50ns, V_F = 1.75V @ 4A, DO-201AD	Slower recovery increases switching loss at >100kHz; otherwise pin-compatible	Prefer for cost-sensitive 50–100kHz designs where 50ns t_rr is acceptable

Compared with SF47G, STTH4L06D offers higher voltage margin and marginally better high-frequency efficiency, while MUR460 trades recovery speed for broader legacy compatibility-both require no PCB change but differ in thermal derating above 125°C.

Availability

SF47G is available at Aetrix Electronics and suitable for DC–DC converters, switching mode power supplies, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for SF47G 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 consumer markets since 1979.

The SF4xG series is part of TSC's high-reliability rectifier portfolio, engineered specifically for high-efficiency, high-frequency power conversion in space-constrained and thermally demanding applications.

FAQ

What is the maximum repetitive peak reverse voltage rating for SF47G?

The SF47G has a maximum repetitive peak reverse voltage (V_RRM) of 500V, verified per Taiwan Semiconductor's G2105 datasheet. This rating ensures reliable blocking capability in 400V DC bus systems with 25% safety margin. The SF47G must not be operated beyond this voltage under repetitive conditions to prevent avalanche breakdown or premature failure.

What is the forward voltage drop of SF47G at its rated current?

The SF47G exhibits a maximum forward voltage (V_F) of 1.7V at 4A and 25°C, as specified in the electrical characteristics table. At elevated junction temperatures (e.g., 125°C), V_F decreases slightly due to negative temperature coefficient of silicon diodes, remaining within 1.55–1.65V range under typical operating conditions.

Is SF47G suitable for automotive applications?

The base SF47G is not AEC-Q101 qualified; however, the variant SF47GH (marked with "H") is explicitly qualified per AEC-Q101. For automotive use, only SF47GH should be selected-its qualification covers temperature cycling, humidity testing, and mechanical shock, ensuring reliability in under-hood environments where SF47G alone does not comply.

What package type does SF47G use and what are its thermal characteristics?

SF47G uses the DO-201AD axial-leaded package with R_θJA = 25°C/W. Its 1.10g mass and UL 94V-0 molding compound support robust thermal dissipation in free-air conditions. At 4A continuous current, junction temperature rise is approximately 100°C above ambient-requiring adequate copper area or minimal heatsinking for sustained operation.

How does SF47G compare to SF46G in terms of key electrical parameters?

SF47G and SF46G share identical I_F (4A), I_FSM (125A), t_rr (35ns), and package (DO-201AD), differing only in V_RRM: SF46G = 400V, SF47G = 500V. Their V_F values are both max 1.3V (SF46G) and 1.7V (SF47G), reflecting higher doping resistance needed for increased voltage rating-making SF47G optimal for 400–500V DC link applications.

SF47G R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 500 V

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 4 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 500 V

Capacitance @ Vr, F:: 80pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF47G R0G FAQ

1.How can I place an order for SF47G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF47G R0G 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 SF47G R0G reliable?

The price and inventory of SF47G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF47G R0G is usually 5 days.

3.What payment methods are accepted for SF47G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF47G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF47G R0G?

SF47G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF47G R0G 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 SF47G R0G?

For technical support, including SF47G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF47G R0G requirements.

6.How does Aetrix verify that SF47G R0G is sourced from the original manufacturer or authorized distributors?

All SF47G R0G 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 SF47G R0G meets industry standards.

7.What is the process for return or replacement of SF47G R0G?

All SF47G R0G units undergo pre-shipment inspection (PSI). If there is an issue with SF47G R0G, 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 SF47G R0G part is unused and in its original packaging.

Return procedure for SF47G R0G:

1.Submit a request within 90 days.

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

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