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

Taiwan Semiconductor Corporation S1GLS

Name: S1GLS
Brand: Taiwan Semiconductor Corporation
SKU: S1GLS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1GLS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123H

Datasheet:: S1GLS.pdf

Description:: DIODE GP 400V 1.2A SOD123HE

Quantity:: RFQ Add To RFQ list

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Inventory:20,000

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Product details

Overview

S1GLS from Taiwan Semiconductor is a 400 V, 1.2 A standard surface-mount silicon rectifier diode in SOD-123HE package, designed for DC-DC converters and switching-mode power supplies where compact size, high surge capability (50 A IFSM), and low forward voltage (≤1.3 V at 1.2 A) are critical.

For engineers reviewing the S1GLS datasheet, S1GLS pinout, S1GLS application, or S1GLS equivalent, key selection factors include its 400 V repetitive peak reverse voltage, 175 °C maximum junction temperature, moisture sensitivity level 1 compliance, and suitability for automated placement on high-density PCBs.

Technical Context

The S1GLS is a single-die, unidirectional silicon PN junction rectifier optimized for general-purpose AC-to-DC and DC-to-DC conversion. It operates with a maximum forward current of 1.2 A continuous and withstands 50 A non-repetitive surge current per JESD22-A112 (8.3 ms half-sine).

Thermal performance is defined by R_θJL = 46 °C/W and R_θJA = 86 °C/W on a 5 mm × 5 mm Cu pad test board. Its cathode band polarity marking and matte tin-plated leads ensure reliable solderability per J-STD-002.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines usable input voltage range in bridge or flyback designs.
I_F	1.2 A - Continuous average forward current rating at 75 °C case temperature; determines steady-state power handling capacity.
I_FSM	50 A - Peak non-repetitive surge current (8.3 ms half-sine); supports inrush tolerance in SMPS startup and transient load conditions.
V_F	≤1.3 V @ 1.2 A, 25 °C - Forward voltage drop directly impacts conduction loss and thermal design margin in high-efficiency converters.
T_J max	175 °C - Maximum allowable junction temperature; enables operation in thermally constrained industrial or automotive under-hood environments.
R_θJL	46 °C/W - Junction-to-lead thermal resistance; informs heatsinking strategy when lead-frame conduction is primary cooling path.

Pinout & Package

Package: SOD-123HE - Surface-mount plastic package with gull-wing leads, UL 94V-0 rated molding compound, and 0.022 g mass. Cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during forward conduction	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) in rectifier configurations.
Cathode	Current exit terminal during forward conduction; marked with band	Connected to output filter capacitor or positive rail; polarity must be observed to prevent reverse breakdown.

Key Features

Feature	Design Value
Moisture Sensitivity Level 1	Enables unlimited floor life before reflow; eliminates bake requirement and simplifies SMT line integration.
RoHS & Halogen-Free Compliance	Meets IEC 61249-2-21 and EU RoHS directives; supports environmentally regulated industrial and consumer product certifications.
High Surge Current Capability (50 A)	Withstands repeated inrush events in offline SMPS without degradation; extends reliability in unregulated input applications.
Low Forward Voltage (≤1.3 V)	Reduces conduction losses by ~15% vs. comparable 1A rectifiers; improves efficiency in 5–24 V output converters.

Applications

AC-DC Adapter Power Supply	USB-C PD Fast Charger Secondary Rectification
Use Scenario: 12 V/1.2 A output stage in compact wall adapters using flyback topology. IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC; replaces Schottky in cost-sensitive designs. Use Value: 400 V V_RRM provides 2× safety margin over 12 V reflected voltage; 1.2 A I_F matches typical adapter output ratings.	Use Scenario: Secondary-side rectification in 45 W USB-C PD chargers with synchronous rectifier control. IC Role / Device Role / Timing Role: Standby or auxiliary rectifier in multi-rail outputs; used where synchronous FETs are inactive or during startup. Use Value: Low V_F minimizes standby loss; SOD-123HE footprint allows dense layout alongside controller ICs.
Industrial PLC Power Input Stage	LED Driver Constant-Current Stage
Use Scenario: Input rectification for 24 V DC power modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bridge leg component in full-wave rectifier configuration feeding bulk capacitor. Use Value: 175 °C T_J max ensures stable operation in enclosed cabinets with ambient up to 85 °C.	Use Scenario: High-side rectification in isolated LED drivers with constant-current regulation. IC Role / Device Role / Timing Role: Isolated secondary-side rectifier delivering current to LED string via current-sense resistor. Use Value: 50 A I_FSM handles LED turn-on surges; halogen-free construction meets IEC 62471 photobiological safety requirements.

AC-DC Adapter Power Supply

USB-C PD Fast Charger Secondary Rectification

Use Scenario: 12 V/1.2 A output stage in compact wall adapters using flyback topology.

IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC; replaces Schottky in cost-sensitive designs.

Use Value: 400 V V_RRM provides 2× safety margin over 12 V reflected voltage; 1.2 A I_F matches typical adapter output ratings.

Use Scenario: Secondary-side rectification in 45 W USB-C PD chargers with synchronous rectifier control.

IC Role / Device Role / Timing Role: Standby or auxiliary rectifier in multi-rail outputs; used where synchronous FETs are inactive or during startup.

Use Value: Low V_F minimizes standby loss; SOD-123HE footprint allows dense layout alongside controller ICs.

Industrial PLC Power Input Stage

LED Driver Constant-Current Stage

Use Scenario: Input rectification for 24 V DC power modules in programmable logic controllers.

IC Role / Device Role / Timing Role: Bridge leg component in full-wave rectifier configuration feeding bulk capacitor.

Use Value: 175 °C T_J max ensures stable operation in enclosed cabinets with ambient up to 85 °C.

Use Scenario: High-side rectification in isolated LED drivers with constant-current regulation.

IC Role / Device Role / Timing Role: Isolated secondary-side rectifier delivering current to LED string via current-sense resistor.

Use Value: 50 A I_FSM handles LED turn-on surges; halogen-free construction meets IEC 62471 photobiological safety requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR120SFT1G	200 V V_RRM, same 1.2 A I_F, TO-277 package (larger footprint)	Lower voltage rating limits use to ≤100 V AC inputs; higher R_θJA (110 °C/W) reduces thermal headroom	Select only if 200 V blocking suffices and board space permits TO-277 mounting.
Vishay VS-1N4937-M3/54	600 V V_RRM, 1 A I_F, DO-41 through-hole package	Lower current rating requires derating above 85 °C; through-hole assembly incompatible with fully SMT lines	Choose for legacy through-hole designs needing higher voltage margin but accepting reduced current headroom.

Compared with MUR120SFT1G and VS-1N4937-M3/54, the S1GLS uniquely balances 400 V blocking, 1.2 A current, SOD-123HE SMT compatibility, and moisture level 1 handling-making it optimal for new high-density, automated production of mid-voltage industrial and consumer power supplies.

Availability

S1GLS is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose rectification requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for S1GLS 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified products.

The S1GLS belongs to TSC's S1xLS standard rectifier family, engineered for cost-effective, high-reliability AC/DC front-end and secondary-side rectification in industrial, computing, and consumer power systems.

FAQ

What is the maximum junction temperature rating for the S1GLS?

The S1GLS has a maximum junction temperature (T_J) rating of +175 °C, verified per absolute maximum ratings table in the H2103 datasheet. This allows operation in high-ambient environments such as enclosed industrial enclosures or automotive under-dash locations. The S1GLS maintains specified electrical parameters up to this limit when thermal design respects R_θJL = 46 °C/W and proper PCB copper area is used.

Does the S1GLS have a halogen-free construction?

Yes, the S1GLS is halogen-free in accordance with IEC 61249-2-21, as confirmed in the Features section of the H2103 datasheet. This applies to the molding compound and internal materials. The S1GLS also complies with RoHS Directive 2011/65/EU, making it suitable for environmentally regulated end equipment including consumer electronics and industrial automation systems.

What is the forward voltage drop of the S1GLS at rated current?

The S1GLS exhibits a maximum forward voltage (V_F) of 1.3 V at I_F = 1.2 A and T_J = 25 °C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At elevated temperatures or higher currents, V_F decreases slightly due to negative temperature coefficient of silicon PN junctions, but the S1GLS remains within its 1.3 V limit across its full operating range.

Is the S1GLS suitable for automated SMT assembly?

Yes, the S1GLS is explicitly designed for automated placement, as stated in the Features section of the H2103 datasheet. Its SOD-123HE package, matte tin-plated leads compliant with J-STD-002, and moisture sensitivity level 1 (per J-STD-020) eliminate pre-bake requirements and support standard reflow profiles. The S1GLS has been validated for pick-and-place accuracy and solder joint integrity in high-volume manufacturing lines.

How does the S1GLS compare to the S1DLS and S1JLS in terms of voltage rating?

The S1GLS is rated for 400 V repetitive peak reverse voltage (V_RRM), positioned between the 200 V S1DLS and 600 V S1JLS in the S1xLS family. All share identical I_F = 1.2 A, I_FSM = 50 A, package (SOD-123HE), and thermal specs. The S1GLS offers optimal voltage margin for 120 VAC-derived supplies (e.g., 170 V peak) while avoiding over-specification penalties like higher leakage or cost seen in the S1JLS.

S1GLS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123H

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1.2A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1.2 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123HE

Operating Temperature - Junction:: -55°C ~ 175°C

S1GLS FAQ

1.How can I place an order for S1GLS through Aetrix?

Please submit a Request for Quotation (RFQ) for S1GLS 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 S1GLS reliable?

The price and inventory of S1GLS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1GLS is usually 5 days.

3.What payment methods are accepted for S1GLS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1GLS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1GLS?

S1GLS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1GLS 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 S1GLS?

For technical support, including S1GLS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1GLS requirements.

6.How does Aetrix verify that S1GLS is sourced from the original manufacturer or authorized distributors?

All S1GLS 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 S1GLS meets industry standards.

7.What is the process for return or replacement of S1GLS?

All S1GLS units undergo pre-shipment inspection (PSI). If there is an issue with S1GLS, 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 S1GLS part is unused and in its original packaging.

Return procedure for S1GLS:

1.Submit a request within 90 days.

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

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