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

Taiwan Semiconductor Corporation SF13G-K

Name: SF13G-K
Brand: Taiwan Semiconductor Corporation
SKU: SF13G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF13G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SF13G-K.pdf

Description:: 35NS, 1A, 150V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:2,975

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Product details

Overview

SF13G-K from Taiwan Semiconductor is a 1 A, 150 V super fast rectifier diode in DO-204AL (DO-41) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 1 A and 25°C, and 30 A surge current capability. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the SF13G-K datasheet, SF13G-K pinout, SF13G-K application, or SF13G-K equivalent, key selection criteria include V_RRM = 150 V, I_F = 1 A, t_rr = 35 ns, V_F = 0.95 V, and thermal resistance R_θJL = 20 °C/W - all critical for efficiency and reliability in DC-DC converters and SMPS designs.

Technical Context

The SF13G-K is a single-die, planar junction silicon rectifier optimized for high-speed switching operation. Its 35 ns reverse recovery time and low 0.95 V forward voltage enable reduced conduction and switching losses in 50–500 kHz switching topologies.

Designed with pure tin-plated leads compliant with J-STD-002 and JESD 201 Class 1A whisker testing, it supports automated soldering and long-term reliability in industrial-grade ambient temperatures up to +125°C case temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - Maximum repetitive reverse voltage; defines safe blocking capability in 150 V-rated DC bus or flyback secondary circuits.
I_F	1 A continuous - Rated average forward current; supports sustained 1 A load in thermally managed PCB layouts.
t_rr	35 ns - Measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables efficient operation in >200 kHz SMPS without excessive switching loss.
V_F	0.95 V @ 1 A, 25°C - Low conduction drop reduces power dissipation to ≤0.95 W at full rated current.
R_θJL	20 °C/W - Junction-to-lead thermal resistance; allows direct heatsinking via PCB copper pour or lead frame for thermal management.
C_J	20 pF @ 4 V, 1 MHz - Low junction capacitance minimizes capacitive coupling and EMI in high dv/dt environments.
I_FSM	30 A @ 8.3 ms - Non-repetitive surge rating; withstands inrush or fault currents in typical AC/DC front-end or PFC stages.

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, epoxy-molded, cathode indicated by band. RoHS-compliant, halogen-free per IEC 61249-2-21, UL 94V-0 rated molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter or transformer center-tap).
Cathode (banded end)	Forward current exit / reverse voltage blocking terminal	Connected to output rail or positive bus; blocks up to 150 V reverse bias during off-state.

Key Features

Feature	Design Value
Super fast recovery	t_rr = 35 ns ensures minimal switching loss and reduced EMI generation in high-frequency converters.
Low forward voltage	V_F = 0.95 V @ 1 A improves system efficiency by limiting conduction loss to under 1 W at full load.
High surge robustness	I_FSM = 30 A supports reliable operation during startup surges or short-circuit transients.
Thermally optimized package	R_θJL = 20 °C/W enables effective heat transfer to PCB copper or chassis, extending lifetime at T_J ≤ 150°C.
Lead finish & reliability	Pure tin plating meets J-STD-002 solderability and JESD 201 Class 1A whisker resistance for automotive/industrial longevity.

Applications

Buck Converter Output Rectification	Freewheeling Diode in Motor Drives
Use Scenario: Used on the low-side output of non-synchronous buck regulators delivering 1–3 A at 5–24 V. IC Role / Device Role: Freewheeling path for inductor current during high-side switch off-time. Use Value: 35 ns t_rr and 0.95 V V_F minimize voltage overshoot and conduction loss, improving efficiency by ~1.2% vs. standard fast recovery diodes.	Use Scenario: Placed across brushed DC motor windings or relay coils in 12–48 V industrial control modules. IC Role / Device Role: Suppresses inductive kickback voltage spikes during turn-off. Use Value: 150 V V_RRM safely clamps transients up to 150 V, while 30 A I_FSM handles peak energy dissipation without failure.
AC-DC Adapter Secondary Rectifier	DC-DC Isolated Flyback Output
Use Scenario: Secondary-side rectifier in 5–12 V, 1 A wall adapters using 65–100 kHz flyback topology. IC Role / Device Role: Converts transformer-referred AC to regulated DC output. Use Value: Low C_J (20 pF) reduces capacitive coupling noise into feedback circuitry; RoHS/halogen-free compliance meets global safety standards.	Use Scenario: Output rectifier in isolated 12–24 V, 1 A telecom or PoE-powered DC-DC modules. IC Role / Device Role: Provides galvanically isolated DC output with minimal voltage drop. Use Value: 20 °C/W R_θJL allows stable operation at 75°C ambient with no external heatsink, reducing BOM cost and footprint.

Buck Converter Output Rectification

Freewheeling Diode in Motor Drives

Use Scenario: Used on the low-side output of non-synchronous buck regulators delivering 1–3 A at 5–24 V.

IC Role / Device Role: Freewheeling path for inductor current during high-side switch off-time.

Use Value: 35 ns t_rr and 0.95 V V_F minimize voltage overshoot and conduction loss, improving efficiency by ~1.2% vs. standard fast recovery diodes.

Use Scenario: Placed across brushed DC motor windings or relay coils in 12–48 V industrial control modules.

IC Role / Device Role: Suppresses inductive kickback voltage spikes during turn-off.

Use Value: 150 V V_RRM safely clamps transients up to 150 V, while 30 A I_FSM handles peak energy dissipation without failure.

AC-DC Adapter Secondary Rectifier

DC-DC Isolated Flyback Output

Use Scenario: Secondary-side rectifier in 5–12 V, 1 A wall adapters using 65–100 kHz flyback topology.

IC Role / Device Role: Converts transformer-referred AC to regulated DC output.

Use Value: Low C_J (20 pF) reduces capacitive coupling noise into feedback circuitry; RoHS/halogen-free compliance meets global safety standards.

Use Scenario: Output rectifier in isolated 12–24 V, 1 A telecom or PoE-powered DC-DC modules.

IC Role / Device Role: Provides galvanically isolated DC output with minimal voltage drop.

Use Value: 20 °C/W R_θJL allows stable operation at 75°C ambient with no external heatsink, reducing BOM cost and footprint.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, t_rr = 35 ns, V_F = 1.15 V @ 1 A - higher blocking voltage but higher forward drop.	Preferred where input transients exceed 150 V or universal input AC-DC is required.	Select STTH1R06 only if system requires >150 V reverse margin; otherwise SF13G-K offers better efficiency at 150 V systems.
ON Semi MUR115	V_RRM = 150 V, t_rr = 35 ns, V_F = 0.93 V @ 1 A - nearly identical specs, same DO-41 package, slightly lower V_F.	Drop-in replacement in existing layouts; validated in legacy industrial SMPS designs.	MUR115 is suitable for direct substitution where tighter V_F tolerance (<0.93 V) is prioritized over Taiwan Semiconductor's halogen-free compound.

Compared with STTH1R06 and MUR115, the SF13G-K delivers optimal balance of low V_F, industry-standard t_rr, and halogen-free compliance - making it preferred for cost-sensitive, thermally constrained 150 V DC-DC and adapter applications where RoHS and material sustainability are mandated.

Availability

SF13G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS/halogen-free compliance.

Supply support for SF13G-K 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 for industrial and consumer markets.

The SF1xG-K series was developed specifically for high-efficiency, high-reliability switching power conversion - targeting cost-effective, thermally robust rectification in compact 1 A power supplies where speed, low loss, and regulatory compliance are jointly critical.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF13G-K?

The SF13G-K has a V_RRM rating of 150 V, meaning it can reliably block up to 150 V of reverse-biased voltage in repetitive operation. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet Version B2104 and is specific to the SF13G-K variant - not extrapolated from adjacent family members like SF12G-K or SF14G-K.

What is the forward voltage (V_F) of SF13G-K at 1 A and 25°C?

The SF13G-K exhibits a typical forward voltage of 0.95 V when conducting 1 A at 25°C junction temperature, as specified in the Electrical Specifications table under "Forward voltage(1)" for SF13G-K. This value is measured with 0.3 ms pulse width and is critical for calculating conduction losses in power stage design.

Does SF13G-K have a defined reverse recovery time (t_rr)?

Yes, the SF13G-K has a maximum reverse recovery time of 35 ns, tested under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is explicitly listed in the Electrical Specifications section and distinguishes SF13G-K as a super fast rectifier suitable for >200 kHz switching frequencies.

Is SF13G-K RoHS and halogen-free compliant?

Yes, SF13G-K is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. The device uses green molding compound and pure tin-plated leads, satisfying environmental requirements for consumer, industrial, and automotive-tier applications.

What package type does SF13G-K use, and how is polarity marked?

SF13G-K uses the DO-204AL (DO-41) axial package, with polarity indicated by a visible cathode band on the banded end. The mechanical data confirms this package includes UL 94V-0 flammability rating, J-STD-002 solderability, and JESD 201 Class 1A whisker resistance - all verified for SF13G-K in the official documentation.

SF13G-K Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 150 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 1 A

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

Reverse Recovery Time (trr):: 35 ns

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

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

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

SF13G-K FAQ

1.How can I place an order for SF13G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for SF13G-K 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 SF13G-K reliable?

The price and inventory of SF13G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF13G-K is usually 5 days.

3.What payment methods are accepted for SF13G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF13G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF13G-K?

SF13G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF13G-K 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 SF13G-K?

For technical support, including SF13G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF13G-K requirements.

6.How does Aetrix verify that SF13G-K is sourced from the original manufacturer or authorized distributors?

All SF13G-K 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 SF13G-K meets industry standards.

7.What is the process for return or replacement of SF13G-K?

All SF13G-K units undergo pre-shipment inspection (PSI). If there is an issue with SF13G-K, 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 SF13G-K part is unused and in its original packaging.

Return procedure for SF13G-K:

1.Submit a request within 90 days.

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

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