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

Taiwan Semiconductor Corporation SF43G R0G

Name: SF43G R0G
Brand: Taiwan Semiconductor Corporation
SKU: SF43G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF43G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF43G R0G.pdf

Description:: DIODE GEN PURP 150V 4A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:3,662

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Product details

Overview

SF43G from Taiwan Semiconductor is a 150 V, 4 A super fast recovery rectifier diode in DO-201AD package, featuring 35 ns reverse recovery time, 1.0 V forward voltage at 4 A and 25 °C, and 125 A surge capability - deployed in DC-DC converters and switching inverters for high-efficiency power conversion.

For engineers reviewing the SF43G datasheet, SF43G pinout, SF43G application, or SF43G equivalent, key selection criteria include V_RRM = 150 V, I_F = 4 A, t_rr = 35 ns, V_F = 1.0 V (at 4 A), and DO-201AD mechanical compatibility in high-frequency switching power supplies.

Technical Context

This single-die, axial-lead super fast rectifier uses optimized epitaxial construction to achieve low Q_rr and tight t_rr distribution. Its 35 ns reverse recovery time enables operation up to several hundred kHz in hard-switched topologies without excessive switching loss.

The device sustains 150 V repetitive peak reverse voltage with only 5 µA leakage at 25 °C and 500 µA at 125 °C, and exhibits 100 pF junction capacitance at 1 MHz and 4 V reverse bias - critical for EMI control and snubber design in compact SMPS layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - maximum blocking voltage in repetitive AC/DC applications without breakdown
I_F	4 A continuous - rated average forward current at case temperature ≤ 75 °C
t_rr	35 ns - enables efficient high-frequency switching in <500 kHz converters
V_F	1.0 V @ 4 A, 25 °C - low conduction loss improves thermal margin and efficiency
I_FSM	125 A @ 8.3 ms - withstands inrush and transient surges in industrial power supplies
C_J	100 pF @ 1 MHz, 4 V - impacts snubber sizing and EMI filter design
T_J max	150 °C - allows operation in sealed enclosures or high ambient environments

Pinout & Package

DO-201AD package: axial-leaded, molded epoxy case with cathode band marking; lead finish is pure tin per J-STD-002; weight ≈ 1.10 g; UL 94V-0 rated compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to input/source side in rectification path; requires thermal relief on PCB for soldering
Cathode (Lead 2, banded end)	Forward current exit / reverse blocking terminal	Connected to output/load side; polarity must be observed to prevent catastrophic failure

Key Features

Feature	Design Value
Super fast recovery (t_rr = 35 ns)	Reduces switching losses and EMI generation in high-frequency SMPS designs
Low forward voltage (V_F = 1.0 V @ 4 A)	Lowers conduction loss by ~15% vs. standard fast rectifiers, easing thermal management
High surge rating (I_FSM = 125 A)	Supports robust start-up and fault tolerance in motor drives and UPS systems
DO-201AD mechanical standardization	Enables drop-in replacement across legacy 4 A rectifier footprints with proven manufacturability

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side synchronous rectification in isolated 48 V–12 V buck-derived converters for telecom and server PSUs. IC Role / Device Role / Timing Role: Power rectification element handling 4 A continuous output current with minimal voltage drop and fast turn-off. Use Value: 1.0 V V_F reduces conduction loss by 0.4 W vs. 1.1 V alternatives, improving full-load efficiency by 0.3–0.5%.	Use Scenario: Freewheeling path in half-bridge motor drive inverters for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode clamping inductive kickback during PWM dead-time intervals. Use Value: 35 ns t_rr prevents cross-conduction and limits reverse recovery charge (Q_rr), reducing MOSFET stress and heat.
AC-DC Adapter	Industrial Power Supply
Use Scenario: Output rectification in 65 W laptop adapters operating at 100–300 kHz switching frequency. IC Role / Device Role / Timing Role: High-speed output rectifier replacing slower FR series diodes to meet CoC Tier 2 efficiency targets. Use Value: 100 pF C_J minimizes capacitive coupling noise into feedback circuits, easing EMI compliance.	Use Scenario: Input bridge leg or PFC boost diode in 300–500 W industrial SMPS with wide ambient range (-40 to +85 °C). IC Role / Device Role / Timing Role: Primary-side rectification component rated for 150 V V_RRM and 125 A surge under line transients. Use Value: 150 °C T_J_max supports reliable operation without derating in convection-cooled enclosures.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side synchronous rectification in isolated 48 V–12 V buck-derived converters for telecom and server PSUs.

IC Role / Device Role / Timing Role: Power rectification element handling 4 A continuous output current with minimal voltage drop and fast turn-off.

Use Value: 1.0 V V_F reduces conduction loss by 0.4 W vs. 1.1 V alternatives, improving full-load efficiency by 0.3–0.5%.

Use Scenario: Freewheeling path in half-bridge motor drive inverters for HVAC compressors and industrial pumps.

IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode clamping inductive kickback during PWM dead-time intervals.

Use Value: 35 ns t_rr prevents cross-conduction and limits reverse recovery charge (Q_rr), reducing MOSFET stress and heat.

AC-DC Adapter

Industrial Power Supply

Use Scenario: Output rectification in 65 W laptop adapters operating at 100–300 kHz switching frequency.

IC Role / Device Role / Timing Role: High-speed output rectifier replacing slower FR series diodes to meet CoC Tier 2 efficiency targets.

Use Value: 100 pF C_J minimizes capacitive coupling noise into feedback circuits, easing EMI compliance.

Use Scenario: Input bridge leg or PFC boost diode in 300–500 W industrial SMPS with wide ambient range (-40 to +85 °C).

IC Role / Device Role / Timing Role: Primary-side rectification component rated for 150 V V_RRM and 125 A surge under line transients.

Use Value: 150 °C T_J_max supports reliable operation without derating in convection-cooled enclosures.

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 = 600 V, t_rr = 30 ns, V_F = 1.15 V @ 4 A, DO-201AD	Higher voltage rating suits 400 V bus designs; slightly higher V_F increases conduction loss	Select when system V_R exceeds 150 V but same footprint and surge capability are required
ON Semi MUR415	V_RRM = 150 V, t_rr = 35 ns, V_F = 1.05 V @ 4 A, DO-201AD	Nearly identical electrical specs; RoHS-compliant but not AEC-Q101 qualified	Preferred for commercial-grade cost-sensitive designs where automotive qualification is unnecessary

Compared with STTH4L06D and MUR415, the SF43G offers optimal balance of 150 V rating, 1.0 V V_F, and AEC-Q101 qualification - making it ideal for automotive auxiliary power modules and industrial converters requiring extended reliability validation.

Availability

SF43G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-term lifecycle support, and consistent DO-201AD mechanical form factor.

Supply support for SF43G 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 devices, and MOSFETs since 1979.

The SF4xG series was developed to deliver AEC-Q101-qualified super fast rectifiers with tightly controlled t_rr and V_F for automotive body electronics and industrial switching power supplies demanding high reliability and thermal robustness.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF43G?

The SF43G has a V_RRM of 150 V, verified per Taiwan Semiconductor's G2105 datasheet. This rating defines the highest instantaneous reverse voltage the SF43G can block repeatedly without avalanche breakdown under normal operating conditions, making it suitable for 100–120 VAC input-derived 150 V bus applications.

Is SF43G AEC-Q101 qualified?

No - the base SF43G variant is not AEC-Q101 qualified. Only versions marked with suffix "H" (e.g., SF43GH) carry AEC-Q101 qualification. The SF43G meets industrial reliability standards including JESD201 Class 2 whisker testing and RoHS/halogen-free compliance, but automotive-grade stress testing applies exclusively to the "H" variants.

What is the forward voltage (V_F) of SF43G at rated current?

The SF43G exhibits a typical forward voltage of 1.0 V at 4 A and 25 °C, as specified in the Electrical Specifications table of the G2105 datasheet. This value is measured under pulsed conditions (PW = 0.3 ms) and decreases slightly at elevated junction temperatures - critical for thermal design of high-density power stages using SF43G.

Does SF43G have the same pinout as other DO-201AD rectifiers?

Yes - the SF43G uses the standard DO-201AD axial package with anode and cathode leads oriented per JEDEC outline. The cathode is marked by a visible band, matching mechanical and electrical pinout conventions of industry-standard 4 A rectifiers like MUR415 and STTH4L06D, enabling direct physical replacement in existing layouts.

What is the junction-to-ambient thermal resistance (R_θJA) of SF43G?

The SF43G has a typical R_θJA of 25 °C/W under standard JEDEC test conditions (single-sided copper pad, 1 in², 2 oz Cu). This value assumes no additional heatsinking; actual thermal performance improves significantly with PCB copper area or external heatsink attachment, directly impacting safe operating area for continuous 4 A operation.

SF43G 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):: 150 V

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 4 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 150 V

Capacitance @ Vr, F:: 100pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF43G R0G FAQ

1.How can I place an order for SF43G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF43G 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 SF43G R0G reliable?

The price and inventory of SF43G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF43G R0G is usually 5 days.

3.What payment methods are accepted for SF43G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF43G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF43G R0G?

SF43G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF43G 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 SF43G R0G?

For technical support, including SF43G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF43G R0G requirements.

6.How does Aetrix verify that SF43G R0G is sourced from the original manufacturer or authorized distributors?

All SF43G 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 SF43G R0G meets industry standards.

7.What is the process for return or replacement of SF43G R0G?

All SF43G R0G units undergo pre-shipment inspection (PSI). If there is an issue with SF43G 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 SF43G R0G part is unused and in its original packaging.

Return procedure for SF43G R0G:

1.Submit a request within 90 days.

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

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