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

Taiwan Semiconductor Corporation SF47G

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

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Part No.:: SF47G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF47G.pdf

Description:: DIODE GEN PURP 500V 4A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:5,001

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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 35ns reverse recovery time, 1.7V forward voltage at 4A/25°C, and 125A surge capability - deployed in high-frequency DC-DC converters and freewheeling paths in automotive power supplies.

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, 25°C), and DO-201AD thermal resistance of 25°C/W - critical for switching loss and thermal design in compact power stages.

Technical Context

The SF47G is a single-die, silicon planar junction super fast rectifier optimized for high-frequency switching applications. Its 35ns reverse recovery time and low junction capacitance (80pF at 1MHz, 4V) minimize switching losses and EMI generation during turn-off transitions.

Designed for operation up to 150°C junction temperature, it supports continuous conduction mode (CCM) and discontinuous conduction mode (DCM) topologies. The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD201 Class 2 whisker testing for automotive-grade reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	500 V - maximum repetitive reverse voltage; defines safe blocking capability in 400–450V DC bus applications
I_F	4 A - average forward current; determines continuous power handling in TO-220-sized footprint
t_rr	35 ns - reverse recovery time; enables efficient operation at ≥100 kHz switching frequencies
V_F	1.7 V @ 4A, 25°C - forward voltage drop; directly impacts conduction loss and thermal rise in high-current paths
R_θJA	25 °C/W - junction-to-ambient thermal resistance; sets minimum heatsinking requirement for 4A continuous load
C_J	80 pF @ 1MHz, 4V - junction capacitance; influences snubber sizing and high-frequency ringing behavior
I_FSM	125 A - non-repetitive surge current (8.3ms half-sine); supports inrush and fault transient tolerance

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; 1.10g mass; UL 94V-0 molding compound; lead-free, RoHS-compliant, halogen-free per IEC 61249-2-21.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to positive rail or output node; withstands 500V reverse bias

Key Features

Feature	Design Value
Super fast recovery	t_rr = 35 ns - reduces switching loss and improves efficiency in >100 kHz SMPS designs
Low forward voltage	V_F = 1.7 V @ 4A - lowers conduction loss vs. standard fast rectifiers (typically >1.9V)
High surge robustness	I_FSM = 125 A - sustains motor startup surges and short-circuit transients without failure
AEC-Q101 qualification option	Available as SF47GH - meets stress test requirements for automotive under-hood power modules
Halogen-free construction	Complies with IEC 61249-2-21 - satisfies environmental compliance for industrial and automotive OEMs

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side synchronous rectification in isolated 48V–54V input telecom DC-DC bricks operating at 200–300 kHz. IC Role / Device Role / Timing Role: Freewheeling diode in active clamp flyback or LLC resonant converter output stage. Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving full-load efficiency by ~0.8% over standard fast diodes.	Use Scenario: Output rectification in 3-phase solar microinverters with 600V DC link and 50 kHz PWM switching. IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge output stage, clamping inductive kickback during dead-time intervals. Use Value: 500V V_RRM provides 20% margin over 420V RMS line-to-line voltage, while 80pF C_J limits capacitive coupling noise into gate drivers.
Automotive Power Supplies	Industrial Motor Drives
Use Scenario: Input rectification and freewheeling in 12V/24V automotive body control modules (BCM) with load dump protection. IC Role / Device Role / Timing Role: Clamp diode across relay coils and solenoid loads; also used in buck-derived auxiliary power rails. Use Value: 125A I_FSM withstands ISO 7637-2 Pulse 5a (load dump) transients; AEC-Q101-qualified variant (SF47GH) supports automotive qualification.	Use Scenario: Snubber network and freewheeling path in 3-phase IGBT-based VFDs driving HVAC compressors (2–5 kW). IC Role / Device Role / Timing Role: Energy recirculation path during IGBT turn-off; suppresses voltage spikes across switching devices. Use Value: 25°C/W R_θJA enables direct PCB copper pour mounting without additional heatsink, reducing BOM cost and board area.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side synchronous rectification in isolated 48V–54V input telecom DC-DC bricks operating at 200–300 kHz.

IC Role / Device Role / Timing Role: Freewheeling diode in active clamp flyback or LLC resonant converter output stage.

Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving full-load efficiency by ~0.8% over standard fast diodes.

Use Scenario: Output rectification in 3-phase solar microinverters with 600V DC link and 50 kHz PWM switching.

IC Role / Device Role / Timing Role: Unidirectional current path in H-bridge output stage, clamping inductive kickback during dead-time intervals.

Use Value: 500V V_RRM provides 20% margin over 420V RMS line-to-line voltage, while 80pF C_J limits capacitive coupling noise into gate drivers.

Automotive Power Supplies

Industrial Motor Drives

Use Scenario: Input rectification and freewheeling in 12V/24V automotive body control modules (BCM) with load dump protection.

IC Role / Device Role / Timing Role: Clamp diode across relay coils and solenoid loads; also used in buck-derived auxiliary power rails.

Use Value: 125A I_FSM withstands ISO 7637-2 Pulse 5a (load dump) transients; AEC-Q101-qualified variant (SF47GH) supports automotive qualification.

Use Scenario: Snubber network and freewheeling path in 3-phase IGBT-based VFDs driving HVAC compressors (2–5 kW).

IC Role / Device Role / Timing Role: Energy recirculation path during IGBT turn-off; suppresses voltage spikes across switching devices.

Use Value: 25°C/W R_θJA enables direct PCB copper pour mounting without additional heatsink, reducing BOM cost and board area.

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-4EY50	V_RRM = 500V, I_F = 4A, t_rr = 35ns, V_F = 1.75V - nearly identical specs; DO-201AD package	No AEC-Q101 option; RoHS but not halogen-free certified	Select when halogen-free compliance is not required and Vishay supply chain preference applies
ON Semiconductor MUR450	V_RRM = 500V, I_F = 4A, t_rr = 50ns, V_F = 1.7V - slower recovery, same V_F; same DO-201AD footprint	Higher Q_rr increases switching loss above 150 kHz; not AEC-Q101 qualified	Acceptable for <150 kHz designs where cost sensitivity outweighs efficiency gain from 35ns t_rr

Compared with VS-4EY50 and MUR450, the SF47G delivers identical 500V/4A rating and 35ns recovery, but only SF47G offers halogen-free construction and AEC-Q101-qualified variant (SF47GH), making it preferred for automotive and green-industrial designs requiring full environmental and reliability certification.

Availability

SF47G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive power supplies requiring stable component supply, long-term lifecycle support, and traceable green-material compliance.

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 global industrial, automotive, and consumer markets since 1979.

The SF47G belongs to TSC's SF4xG super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained and thermally demanding applications - especially where fast recovery, low V_F, and automotive-grade robustness intersect.

FAQ

What is the maximum junction temperature rating for the SF47G?

The SF47G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table. This allows reliable operation in high-ambient environments such as under-hood automotive locations or enclosed industrial enclosures. Derating curves confirm usable current capacity down to 2.2A at 100°C ambient, assuming standard DO-201AD PCB mounting. The SF47G must be operated within this limit to ensure long-term reliability and avoid thermal runaway.

Does the SF47G have an AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified version of the SF47G is designated SF47GH. It undergoes the full stress test suite defined in AEC-Q101, including HTGB, HTRB, and temperature cycling. The SF47GH shares identical electrical parameters and DO-201AD packaging with the standard SF47G, differing only in qualification status and part marking. For automotive applications requiring formal qualification, SF47GH is the appropriate ordering code.

What is the forward voltage of the SF47G at 4A and 125°C junction temperature?

The SF47G datasheet specifies V_F = 1.7V maximum at I_F = 4A and T_J = 25°C. At elevated temperature, V_F decreases - typical data shows ~1.45V at 4A and 125°C. This negative temperature coefficient helps stabilize thermal performance in parallel configurations. The SF47G maintains this behavior across its full operating range without degradation, supporting consistent conduction loss modeling in thermal simulations.

How does the SF47G compare to the SF46G in terms of reverse voltage rating?

The SF47G has a repetitive peak reverse voltage (V_RRM) of 500V, while the SF46G is rated at 400V. Both share identical forward current (4A), surge rating (125A), and recovery time (35ns). The 100V higher blocking capability of the SF47G makes it suitable for 400–450V DC bus systems where margin against transients is critical. Select SF47G over SF46G when system-level voltage stress exceeds 350V or when future-proofing for higher input voltages is required.

Is the SF47G halogen-free and RoHS compliant?

Yes, the SF47G is both RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated or chlorinated flame retardants, and lead content is below 1000 ppm. Tin-plated leads meet J-STD-002 solderability standards. These certifications are documented in TSC's material declarations and apply to all SF47G units shipped under revision G2105 - confirming suitability for environmentally regulated industrial and automotive end equipment.

SF47G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

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 FAQ

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

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

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

3.What payment methods are accepted for SF47G?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF47G?

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

Once your SF47G 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?

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

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

All SF47G 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 meets industry standards.

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

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

Return procedure for SF47G:

1.Submit a request within 90 days.

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

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