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

Taiwan Semiconductor Corporation S2GFS

Name: S2GFS
Brand: Taiwan Semiconductor Corporation
SKU: S2GFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2GFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S2GFS.pdf

Description:: DIODE GEN PURP 400V 2A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:7

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Product details

Overview

S2GFS from Taiwan Semiconductor is a 2 A, 400 V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 50 A surge rating (8.3 ms), and 150 °C max junction temperature - used in DC-DC converters and switching-mode inverters.

For engineers reviewing the S2GFS datasheet, S2GFS pinout, S2GFS application, or S2GFS equivalent, key selection criteria include repetitive peak reverse voltage (400 V), forward voltage at 2 A (≤1.10 V @ 25°C), thermal resistance (R_θJL = 14 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.

Technical Context

The S2GFS is a single-die, standard recovery rectifier with unidirectional conduction and cathode-band polarity marking. Its glass-passivated junction ensures stable reverse leakage (<1 µA @ 25°C, <33 µA @ 125°C) and robustness against humidity and mechanical stress.

Thermal performance is characterized for PCB-mounted operation on 5 mm × 5 mm copper pads: R_θJA = 74 °C/W, R_θJC = 20 °C/W, enabling reliable 2 A continuous operation up to 150 °C junction temperature under derated conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse voltage the device blocks without breakdown
I_F	2 A - average forward current rating at 75 °C case temperature per derating curve
I_FSM (8.3 ms)	50 A - non-repetitive surge current capability for transient overload protection
V_F @ 2 A, 25°C	≤1.10 V - forward voltage drop defining conduction loss and thermal load at full rated current
R_θJL	14 °C/W - junction-to-lead thermal resistance, critical for solder-joint temperature estimation
C_J @ 1 MHz, 4 V	12 pF - junction capacitance affecting high-frequency switching noise and EMI behavior

Pinout & Package

Package: SOD-128 - surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity indicated by cathode band, weight ≈ 0.027 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry terminal	Connected to lower-potential side of AC input or switch node in bridge/rectifier configuration
Cathode	Forward current exit terminal	Marked by band; connects to output capacitor or positive rail - defines unidirectional conduction path

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable IR performance and long-term reliability in humid environments without hermetic sealing
MSL Level 1	Allows unlimited floor life and reflow compatibility without dry-pack or baking requirements
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant industrial and consumer designs
Low R_θJL	14 °C/W enables efficient heat transfer to PCB copper, reducing need for oversized thermal pads

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency transformer output to regulated DC. Use Value: 400 V V_RRM and 2 A I_F support common 12–24 V output designs with margin for reflected transients.	Use Scenario: Output stage rectification in motor drive inverters or UPS systems operating from 300–400 V DC bus. IC Role / Device Role / Timing Role: Unidirectional current path for AC waveform reconstruction after H-bridge switching. Use Value: 50 A I_FSM withstands inrush during startup; low V_F minimizes conduction loss in high-duty-cycle operation.
General-Purpose AC/DC Adapter	Industrial Power Supply Input Stage
Use Scenario: Input rectification in compact wall adapters with universal AC input (90–264 VAC). IC Role / Device Role / Timing Role: Bridge or half-wave rectifier feeding bulk capacitor in offline SMPS. Use Value: SOD-128 footprint enables high power density; MSL 1 simplifies manufacturing flow.	Use Scenario: Front-end rectification in DIN-rail mounted 24/48 V industrial PSUs handling 100–240 VAC input. IC Role / Device Role / Timing Role: High-reliability rectifier in harsh ambient (−40 to +85 °C ambient, 150 °C junction). Use Value: 150 °C T_JMAX and halogen-free construction meet extended-life and safety certification needs.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency transformer output to regulated DC.

Use Value: 400 V V_RRM and 2 A I_F support common 12–24 V output designs with margin for reflected transients.

Use Scenario: Output stage rectification in motor drive inverters or UPS systems operating from 300–400 V DC bus.

IC Role / Device Role / Timing Role: Unidirectional current path for AC waveform reconstruction after H-bridge switching.

Use Value: 50 A I_FSM withstands inrush during startup; low V_F minimizes conduction loss in high-duty-cycle operation.

General-Purpose AC/DC Adapter

Industrial Power Supply Input Stage

Use Scenario: Input rectification in compact wall adapters with universal AC input (90–264 VAC).

IC Role / Device Role / Timing Role: Bridge or half-wave rectifier feeding bulk capacitor in offline SMPS.

Use Value: SOD-128 footprint enables high power density; MSL 1 simplifies manufacturing flow.

Use Scenario: Front-end rectification in DIN-rail mounted 24/48 V industrial PSUs handling 100–240 VAC input.

IC Role / Device Role / Timing Role: High-reliability rectifier in harsh ambient (−40 to +85 °C ambient, 150 °C junction).

Use Value: 150 °C T_JMAX and halogen-free construction meet extended-life and safety certification needs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R04S	400 V V_RRM, 2 A I_F, but faster recovery (t_rr = 45 ns vs. standard ~2 µs), higher V_F (~1.3 V)	Better suited for high-frequency PFC or ZVS circuits where reverse recovery matters	Select S2GFS for cost-sensitive, thermally constrained, or low-noise applications where standard recovery is acceptable
ES2D	200 V V_RRM, same I_F/package, lower V_F (~0.95 V), but insufficient voltage margin for 400 V designs	Limited to ≤200 V AC/DC or low-voltage DC-DC outputs	Only viable if system peak reverse voltage stays below 200 V; not a direct replacement for S2GFS in 400 V applications

Compared with STTH2R04S and ES2D, the S2GFS offers optimal balance of voltage rating, thermal efficiency (R_θJL = 14 °C/W), and cost for general-purpose 400 V rectification - especially where standard recovery and low forward drop are prioritized over speed.

Availability

S2GFS is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for S2GFS 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 S2GFS belongs to TSC's S2xFS standard rectifier family, engineered for high-reliability, cost-effective AC/DC and DC/DC power conversion in space-constrained surface-mount applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S2GFS?

The S2GFS has a V_RRM of 400 V, meaning it reliably blocks reverse voltages up to this level without breakdown. This rating is confirmed in the Absolute Maximum Ratings table and distinguishes S2GFS from S2DFS (200 V) and S2JFS (600 V) in the same family. The S2GFS must not be operated beyond 400 V in repetitive reverse bias conditions.

Does the S2GFS have a specified forward voltage (V_F) at full rated current?

Yes - the S2GFS specifies V_F ≤ 1.10 V at I_F = 2 A and T_J = 25°C, with typical value 0.98 V. At elevated temperature (125°C), V_F drops to ≤0.98 V, reflecting silicon's negative temperature coefficient. This V_F directly determines conduction loss and thermal design margin for the S2GFS.

Is the S2GFS compatible with lead-free reflow soldering processes?

Yes - the S2GFS features matte tin-plated leads qualified per J-STD-002 for solderability and meets JEDEC J-STD-020 moisture sensitivity level 1, allowing unlimited floor life and compatibility with standard Pb-free reflow profiles (peak ≤260°C). No pre-baking is required before assembly.

What is the thermal resistance from junction to ambient (R_θJA) for the S2GFS?

The S2GFS has R_θJA = 74 °C/W when mounted on a 5 mm × 5 mm copper pad per JEDEC test board standard. This value assumes natural convection and is used to estimate junction temperature rise above ambient under steady-state I_F loading. For accurate thermal design, R_θJL = 14 °C/W should also be considered for solder-joint temperature prediction.

How is polarity marked on the S2GFS package?

Polarity is marked by a visible cathode band on the SOD-128 body - the banded end is the cathode terminal. This marking aligns with industry-standard diode orientation and must be verified during PCB layout and automated placement to ensure correct unidirectional conduction. The S2GFS anode connects to the lower-potential node in the circuit.

S2GFS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 2 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 400 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

S2GFS FAQ

1.How can I place an order for S2GFS through Aetrix?

Please submit a Request for Quotation (RFQ) for S2GFS 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 S2GFS reliable?

The price and inventory of S2GFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2GFS is usually 5 days.

3.What payment methods are accepted for S2GFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2GFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2GFS?

S2GFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2GFS 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 S2GFS?

For technical support, including S2GFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2GFS requirements.

6.How does Aetrix verify that S2GFS is sourced from the original manufacturer or authorized distributors?

All S2GFS 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 S2GFS meets industry standards.

7.What is the process for return or replacement of S2GFS?

All S2GFS units undergo pre-shipment inspection (PSI). If there is an issue with S2GFS, 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 S2GFS part is unused and in its original packaging.

Return procedure for S2GFS:

1.Submit a request within 90 days.

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

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