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

Taiwan Semiconductor Corporation SF35G

Name: SF35G
Brand: Taiwan Semiconductor Corporation
SKU: SF35G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF35G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF35G.pdf

Description:: DIODE GEN PURP 300V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:2,490

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Product details

Overview

SF35G from Taiwan Semiconductor is a 3A, 300V super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 1.30V forward voltage at 3A/25°C, and 125A surge capability - deployed in DC-DC converters and switching inverters for high-efficiency power conversion.

For engineers reviewing the SF35G datasheet, SF35G pinout, SF35G application, or SF35G equivalent, key selection criteria include V_RRM = 300V, I_F = 3A, t_rr = 35ns, thermal resistance R_θJL = 10°C/W, and AEC-Q101 qualification status (SF35GH variant only).

Technical Context

The SF35G uses a single-die silicon PN junction optimized for fast switching in hard-commutated topologies. Its 35ns reverse recovery time enables operation up to several hundred kHz in SMPS designs while maintaining low conduction loss via 1.30V V_F at rated current.

Thermally, it delivers R_θJL = 10°C/W and R_θJC = 9°C/W, supporting reliable 3A continuous operation with appropriate PCB copper area. The DO-201AD package features pure tin-plated leads compliant with J-STD-002 and JESD201 Class 2 whisker testing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	300 V - Maximum repetitive reverse voltage before breakdown; sets usable input voltage range in buck/boost stages
I_F	3 A - Continuous forward current rating at T_L = 75°C; defines minimum heatsinking requirement
t_rr	35 ns - Measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables high-frequency switching with low switching loss
V_F	1.30 V @ 3A, 25°C - Forward voltage drop directly impacts conduction loss and thermal design
R_θJL	10 °C/W - Junction-to-lead thermal resistance; used to calculate die temperature rise above lead temperature
C_J	60 pF @ 1MHz, 4V - Junction capacitance affects high-frequency noise and snubber sizing

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connected to lower-potential side of circuit; polarity must match layout to avoid reverse bias failure
Cathode (banded end)	Forward current exit / reverse blocking terminal	Marked by visible band; ties to higher-potential node in freewheeling or output rectification paths

Key Features

Feature	Design Value
Super fast recovery	35 ns t_rr enables efficient operation in 100–500 kHz SMPS without excessive switching loss
Low forward voltage	1.30 V @ 3A reduces conduction loss by ~15% vs. standard FRDs with comparable V_RRM
High surge robustness	125 A I_FSM (8.3 ms sine) supports inrush and transient overload in industrial power supplies
AEC-Q101 option	SF35GH variant qualified for automotive underhood applications per stress test requirements

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side synchronous rectification in isolated flyback or forward converters delivering 12–48V outputs. IC Role / Device Role / Timing Role: Freewheeling rectifier handling 3A continuous output current with minimal V_F-related loss. Use Value: 1.30V V_F and 35ns t_rr reduce total power loss by >0.5W vs. standard FRDs at 200kHz switching.	Use Scenario: Output stage rectification in 1–3kW solar microinverters operating at 50–100kHz. IC Role / Device Role / Timing Role: Fast-recovery output diode managing bidirectional energy flow during PWM dead-time intervals. Use Value: 60pF C_J and 35ns t_rr minimize capacitive ringing and reverse recovery spikes, easing EMI filter design.
Freewheeling Diodes	Industrial SMPS
Use Scenario: Inductive load protection in 24V/48V motor drive H-bridge snubbers and relay coil suppression circuits. IC Role / Device Role / Timing Role: Clamp diode providing low-loss path for stored inductive energy during turn-off. Use Value: 125A I_FSM withstands repeated 50–100A surge events without degradation over 10-year service life.	Use Scenario: Primary-side auxiliary supply and secondary-side bias rail rectification in telecom rectifiers and PLC power modules. IC Role / Device Role / Timing Role: High-reliability rectifier operating continuously at 75°C ambient with full 3A load. Use Value: R_θJL = 10°C/W and T_JMAX = 150°C allow stable operation on 1 oz. copper with no forced air.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side synchronous rectification in isolated flyback or forward converters delivering 12–48V outputs.

IC Role / Device Role / Timing Role: Freewheeling rectifier handling 3A continuous output current with minimal V_F-related loss.

Use Value: 1.30V V_F and 35ns t_rr reduce total power loss by >0.5W vs. standard FRDs at 200kHz switching.

Use Scenario: Output stage rectification in 1–3kW solar microinverters operating at 50–100kHz.

IC Role / Device Role / Timing Role: Fast-recovery output diode managing bidirectional energy flow during PWM dead-time intervals.

Use Value: 60pF C_J and 35ns t_rr minimize capacitive ringing and reverse recovery spikes, easing EMI filter design.

Freewheeling Diodes

Industrial SMPS

Use Scenario: Inductive load protection in 24V/48V motor drive H-bridge snubbers and relay coil suppression circuits.

IC Role / Device Role / Timing Role: Clamp diode providing low-loss path for stored inductive energy during turn-off.

Use Value: 125A I_FSM withstands repeated 50–100A surge events without degradation over 10-year service life.

Use Scenario: Primary-side auxiliary supply and secondary-side bias rail rectification in telecom rectifiers and PLC power modules.

IC Role / Device Role / Timing Role: High-reliability rectifier operating continuously at 75°C ambient with full 3A load.

Use Value: R_θJL = 10°C/W and T_JMAX = 150°C allow stable operation on 1 oz. copper with no forced air.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	V_RRM = 600V, t_rr = 35ns, V_F = 1.45V @ 3A - higher V_RRM, slightly higher V_F	Supports wider input voltage range (e.g., 400VAC PFC front-end), but higher conduction loss at 300V systems	Select when system requires >400V reverse margin; not drop-in due to different marking and minor thermal profile
ON Semi MUR3060CT	Dual common-cathode configuration, V_RRM = 600V, t_rr = 35ns, V_F = 1.75V @ 3A - dual diode, higher V_F, TO-220AB package	Used in dual-output or center-tapped transformer designs; requires PCB footprint change and thermal redesign	Choose only for dual-diode topology needs; not pin-compatible or thermally interchangeable with SF35G

Compared with STTH3L06S and MUR3060CT, the SF35G offers optimal balance of 300V rating, 1.30V V_F, and DO-201AD form factor for cost-sensitive, space-constrained 3A SMPS - avoiding over-spec'd voltage or unnecessary dual-die complexity.

Availability

SF35G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.

Supply support for SF35G 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 SF35G belongs to TSC's SF-series super fast rectifier family, engineered specifically for high-frequency, high-reliability power conversion where low t_rr and controlled V_F are critical to efficiency and thermal performance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF35G?

The SF35G has a V_RRM of 300 V, as confirmed in the Absolute Maximum Ratings table across all versions of the SF31G–SF38G family. This value is fixed for the SF35G marking code and defines its safe reverse-bias operating limit in applications like output rectification and freewheeling paths.

Is SF35G AEC-Q101 qualified?

The base SF35G is not AEC-Q101 qualified; only the SF35GH variant carries AEC-Q101 qualification per the Ordering Information table. The "H" suffix explicitly denotes automotive-grade stress testing compliance, while standard SF35G is intended for industrial and commercial use.

What is the forward voltage (V_F) of SF35G at rated current?

The SF35G exhibits a maximum forward voltage of 1.30 V at I_F = 3 A and T_J = 25°C, as specified in the Electrical Specifications table. This value is measured under pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal design calculations.

What package type does SF35G use, and what are its mechanical highlights?

SF35G uses the DO-201AD axial package with cathode band polarity marking. Key mechanical attributes include UL 94V-0 molding compound, pure tin-plated leads compliant with J-STD-002 solderability, and JESD201 Class 2 whisker resistance - all verified in the Mechanical Data section.

How does SF35G compare to SF34G and SF36G in terms of voltage rating and forward voltage?

SF35G is rated for 300 V V_RRM and 1.30 V V_F; SF34G is 200 V / 0.95 V, and SF36G is 400 V / 1.30 V. The V_F step change occurs between SF34G and SF35G due to process tuning for higher-voltage die, making SF35G the lowest-V_F option among ≥300V variants in the SF-series.

SF35G 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):: 300 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 3 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 300 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF35G FAQ

1.How can I place an order for SF35G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF35G 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 SF35G reliable?

The price and inventory of SF35G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF35G is usually 5 days.

3.What payment methods are accepted for SF35G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF35G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF35G?

SF35G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF35G 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 SF35G?

For technical support, including SF35G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF35G requirements.

6.How does Aetrix verify that SF35G is sourced from the original manufacturer or authorized distributors?

All SF35G 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 SF35G meets industry standards.

7.What is the process for return or replacement of SF35G?

All SF35G units undergo pre-shipment inspection (PSI). If there is an issue with SF35G, 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 SF35G part is unused and in its original packaging.

Return procedure for SF35G:

1.Submit a request within 90 days.

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

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