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

Taiwan Semiconductor Corporation SF2L4G

Name: SF2L4G
Brand: Taiwan Semiconductor Corporation
SKU: SF2L4G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF2L4G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SF2L4G.pdf

Description:: DIODE GEN PURP 200V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,500

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Product details

Overview

SF2L4G from Taiwan Semiconductor is a 2 A, 200 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 0.95 V max forward voltage at 2 A and 25°C, 50 A surge capability, and glass passivated junction for reliability in high-frequency switching power supplies.

For engineers reviewing the SF2L4G datasheet, SF2L4G pinout, SF2L4G application, or SF2L4G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward current rating (2 A), thermal resistance (R_θJL = 17 °C/W), and AEC-Q101 qualification availability in higher-grade variants.

Technical Context

The SF2L4G employs a single-die silicon PN junction with glass passivation to ensure stable operation under repeated thermal cycling and high dv/dt conditions. Its 35 ns trr and low VF support high-efficiency DC–DC conversion in compact topologies.

Designed for unidirectional conduction in flyback, boost, and freewheeling paths, it operates across –55°C to +150°C junction temperature range with 17 °C/W junction-to-lead thermal resistance-enabling direct PCB copper pad heat sinking without additional heatsinks at rated load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines safe operating ceiling in clamped or snubbered topologies
I_F	2 A - Continuous average forward current; sets minimum trace width and thermal pad area for PCB layout
I_FSM	50 A - Non-repetitive surge rating (8.3 ms half-sine); supports inrush current handling in SMPS startup
V_F (max)	0.95 V @ 2 A, 25°C - Directly determines conduction loss (1.9 W max at full load), critical for thermal budget
t_rr	35 ns - Enables >100 kHz switching frequencies with minimal switching loss and EMI generation
R_θJL	17 °C/W - Quantifies thermal path efficiency from die to lead; enables accurate junction temp estimation using lead temp
C_J	40 pF @ 4 V - Affects high-frequency noise coupling and snubber design in resonant converters

Pinout & Package

DO-204AC (DO-15) 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 (unmarked end)	Forward current entry point	Connected to lower-potential node (e.g., switch node in boost, source in buck); requires adequate creepage clearance
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or ground return; polarity must match PCB silkscreen to prevent catastrophic failure

Key Features

Feature	Design Value
Super fast recovery (t_rr = 35 ns)	Reduces switching losses and EMI in >100 kHz SMPS designs versus standard rectifiers (t_rr > 500 ns)
Glass passivated junction	Prevents moisture ingress and metallization corrosion, extending lifetime in humid or automotive under-hood environments
Low V_F (0.95 V max)	Lowers conduction loss by ~25% vs. comparable 200 V Schottky diodes above 85°C, improving thermal stability
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated industrial and consumer shipments
Junction temp range (–55°C to +150°C)	Supports operation in extended-temperature applications including outdoor power supplies and industrial motor drives

Applications

DC–DC Converter	Switching Inverter
Use Scenario: Isolated flyback converter delivering 12 V/2 A from 24 V input in telecom power module. IC Role / Device Role / Timing Role: Output rectifier conducting during transformer reset phase; handles 2 A DC output with 35 ns recovery minimizing cross-conduction loss. Use Value: 0.95 V V_F limits conduction loss to ≤1.9 W, enabling natural convection cooling without heatsink.	Use Scenario: Single-phase H-bridge inverter driving 100 W BLDC fan with 20 kHz PWM carrier. IC Role / Device Role / Timing Role: Freewheeling diode across each MOSFET; clamps inductive kickback with 50 A surge tolerance during fault events. Use Value: 35 ns t_rr prevents reverse recovery tail current, reducing shoot-through risk and gate driver stress.
AC–DC Adapter	Industrial Power Supply
Use Scenario: 36 W offline adapter using QR flyback topology with 65 kHz switching frequency. IC Role / Device Role / Timing Role: Secondary-side rectifier synchronized to primary-side MOSFET turn-off; recovers before next cycle begins. Use Value: 40 pF junction capacitance minimizes capacitive coupling of high dv/dt noise into feedback loop.	Use Scenario: 200 W industrial PSU with active PFC front-end and LLC resonant secondary stage. IC Role / Device Role / Timing Role: Output rectifier in LLC synchronous rectification auxiliary path; withstands 150°C ambient via R_θJL = 17 °C/W path. Use Value: Glass passivation ensures long-term reliability under thermal cycling and vibration in factory automation equipment.

DC–DC Converter

Switching Inverter

Use Scenario: Isolated flyback converter delivering 12 V/2 A from 24 V input in telecom power module.

IC Role / Device Role / Timing Role: Output rectifier conducting during transformer reset phase; handles 2 A DC output with 35 ns recovery minimizing cross-conduction loss.

Use Value: 0.95 V V_F limits conduction loss to ≤1.9 W, enabling natural convection cooling without heatsink.

Use Scenario: Single-phase H-bridge inverter driving 100 W BLDC fan with 20 kHz PWM carrier.

IC Role / Device Role / Timing Role: Freewheeling diode across each MOSFET; clamps inductive kickback with 50 A surge tolerance during fault events.

Use Value: 35 ns t_rr prevents reverse recovery tail current, reducing shoot-through risk and gate driver stress.

AC–DC Adapter

Industrial Power Supply

Use Scenario: 36 W offline adapter using QR flyback topology with 65 kHz switching frequency.

IC Role / Device Role / Timing Role: Secondary-side rectifier synchronized to primary-side MOSFET turn-off; recovers before next cycle begins.

Use Value: 40 pF junction capacitance minimizes capacitive coupling of high dv/dt noise into feedback loop.

Use Scenario: 200 W industrial PSU with active PFC front-end and LLC resonant secondary stage.

IC Role / Device Role / Timing Role: Output rectifier in LLC synchronous rectification auxiliary path; withstands 150°C ambient via R_θJL = 17 °C/W path.

Use Value: Glass passivation ensures long-term reliability under thermal cycling and vibration in factory automation equipment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R02	Same 2 A / 200 V rating; t_rr = 30 ns, V_F = 0.92 V typ, but R_θJL = 20 °C/W and no AEC-Q101 option	Better speed/VF trade-off, but higher thermal resistance limits power density in compact designs	Preferred where ultimate efficiency at 25°C dominates; avoid if lead temperature exceeds 110°C
ON Semi MUR220	2 A / 200 V; t_rr = 35 ns, V_F = 0.97 V max, R_θJL = 18 °C/W, halogen-free but not RoHS-compliant in legacy batches	Near-identical electrical specs; requires verification of RoHS status per lot number	Select when sourcing continuity is prioritized and RoHS documentation is confirmed per shipment

Compared with STTH2R02 and MUR220, the SF2L4G offers superior thermal performance (R_θJL = 17 °C/W) and guaranteed RoHS/halogen-free compliance, making it optimal for space-constrained, thermally demanding, and environmentally regulated industrial designs.

Availability

SF2L4G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SF2L4G 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, computing, and consumer markets since 1979.

The SF2L4G belongs to TSC's Super Fast Rectifier family, engineered specifically for high-frequency switching power conversion where low recovery time, stable V_F, and robust thermal performance are critical.

FAQ

What is the maximum junction temperature rating for the SF2L4G?

The SF2L4G has a maximum junction temperature (T_J) rating of +150°C, with operational range spanning –55°C to +150°C. This allows reliable use in high-ambient environments such as enclosed industrial power supplies or automotive under-hood auxiliary systems. The SF2L4G's R_θJL of 17 °C/W enables accurate junction temperature estimation using measured lead temperature, supporting thermal design validation without infrared imaging.

Is the SF2L4G pin-compatible with other devices in the SF2LxG series?

No-the SF2L4G shares the DO-204AC (DO-15) package and axial pinout with SF2L6G and SF2L8G, but its 200 V V_RRM rating is specific to this variant. Substituting SF2L4G for SF2L6G (400 V) or SF2L8G (600 V) in high-voltage circuits risks premature breakdown. Always verify reverse voltage margin against system peak transients before interchanging SF2LxG variants.

Does the SF2L4G meet AEC-Q101 reliability standards?

The base SF2L4G is not AEC-Q101 qualified; however, the AEC-Q101 variant is designated SF2L4GH (with "H" suffix). Per ordering information, only SF2LxGH parts undergo stress testing per AEC-Q101 Rev D. For automotive body control modules or ADAS power rails, specify SF2L4GH-not SF2L4G-to ensure qualification compliance and long-term reliability under automotive thermal and vibration profiles.

What is the typical junction capacitance of the SF2L4G and how does it affect circuit behavior?

The SF2L4G exhibits 40 pF typical junction capacitance at 1 MHz and 4.0 V reverse bias. This value influences high-frequency noise coupling, snubber sizing, and EMI filter design-especially in resonant LLC or ZVS topologies. Compared to SF2L6G/SF2L8G (20 pF), the higher C_J of SF2L4G increases displacement current during fast dv/dt transitions, necessitating tighter layout control near gate drivers or feedback networks.

How does the SF2L4G's forward voltage compare to Schottky alternatives at elevated temperatures?

At 25°C, Schottky diodes may offer lower V_F than the SF2L4G's 0.95 V max, but their V_F rises minimally with temperature while the SF2L4G's V_F decreases slightly. More critically, Schottkys suffer rapid IR increase above 125°C, whereas the SF2L4G maintains stable 1 µA IR at 25°C and only 100 µA at 125°C-making it more predictable in thermally stressed industrial applications where Schottky leakage could compromise regulation or safety margins.

SF2L4G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 2 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 1 µA @ 200 V

Capacitance @ Vr, F:: 40pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

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

SF2L4G FAQ

1.How can I place an order for SF2L4G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF2L4G 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 SF2L4G reliable?

The price and inventory of SF2L4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF2L4G is usually 5 days.

3.What payment methods are accepted for SF2L4G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF2L4G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF2L4G?

SF2L4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF2L4G 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 SF2L4G?

For technical support, including SF2L4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF2L4G requirements.

6.How does Aetrix verify that SF2L4G is sourced from the original manufacturer or authorized distributors?

All SF2L4G 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 SF2L4G meets industry standards.

7.What is the process for return or replacement of SF2L4G?

All SF2L4G units undergo pre-shipment inspection (PSI). If there is an issue with SF2L4G, 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 SF2L4G part is unused and in its original packaging.

Return procedure for SF2L4G:

1.Submit a request within 90 days.

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

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