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

Taiwan Semiconductor Corporation S1DLS

Name: S1DLS
Brand: Taiwan Semiconductor Corporation
SKU: S1DLS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1DLS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123H

Datasheet:: S1DLS.pdf

Description:: DIODE GP 200V 1.2A SOD123HE

Quantity:: RFQ Add To RFQ list

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Inventory:6,381

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Product details

Overview

S1DLS from Taiwan Semiconductor is a 1.2A, 200V standard surface-mount silicon rectifier diode in SOD-123HE package, featuring 50A peak surge current capability, 1.3V max forward voltage at 1.2A, and 5µA max reverse leakage at 25°C - deployed in DC-DC converters and switching-mode power supplies.

For engineers reviewing the S1DLS datasheet, S1DLS pinout, S1DLS application, or S1DLS equivalent, key selection criteria include repetitive peak reverse voltage (200V), thermal resistance (R_θJL = 46°C/W), junction temperature range (–55°C to +175°C), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The S1DLS is a single-die, standard recovery rectifier optimized for high-efficiency AC/DC and DC/DC conversion stages where low conduction loss and robust surge handling are required. Its 200V V_RRM, 1.2A average forward current, and 50A I_FSM support transient-heavy operation in compact switch-mode topologies.

Thermal performance is characterized with R_θJA = 86°C/W on a 5mm × 5mm Cu pad PCB, enabling reliable operation up to +175°C junction temperature. Polarity is marked by a cathode band, and terminals are matte tin-plated per J-STD-002 solderability standards.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - maximum repetitive reverse voltage the device blocks without breakdown
I_F	1.2 A - continuous average forward current rating under specified thermal conditions
I_FSM	50 A - non-repetitive peak surge current (8.3 ms half-sine) the diode withstands
V_F (max)	1.3 V @ 1.2 A, 25°C - forward voltage drop defining conduction loss in power stage
I_R (max)	5 µA @ 200 V, 25°C - reverse leakage current affecting standby efficiency and isolation
T_J (max)	+175°C - maximum junction temperature enabling high-temperature board-level integration
R_θJL	46 °C/W - junction-to-lead thermal resistance critical for heatsinking via PCB copper

Pinout & Package

Package: SOD-123HE - surface-mount plastic case with matte tin-plated leads, UL 94V-0 molding compound, polarity indicated by cathode band, weight ≈ 0.022 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of rectified path; requires adequate trace width for 1.2A continuous current
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or switching node; defines polarity in bridge or flyback configurations

Key Features

Feature	Design Value
High surge current capability	50A I_FSM supports inrush and fault transients in SMPS without failure
Low forward voltage	1.3V max V_F reduces conduction loss and improves system efficiency at 1.2A load
Moisture sensitivity level 1	No bake requirement before reflow; compatible with standard SMT assembly processes
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives for environmentally constrained applications
Compact SOD-123HE footprint	Enables high-density layout in space-constrained power modules and adapters

Applications

DC-DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated buck-boost or flyback converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: Standard recovery rectifier conducting unidirectional current during transformer demagnetization phase. Use Value: 1.2A I_F and 200V V_RRM match typical 12–48V output stages; low V_F minimizes heat generation in sealed enclosures.	Use Scenario: Freewheeling or anti-parallel diode in half-bridge motor drive inverters for HVAC or industrial pumps. IC Role / Device Role / Timing Role: Provides safe commutation path for inductive kickback during MOSFET turn-off. Use Value: 50A I_FSM handles short-circuit surges; 175°C T_J(max) ensures reliability under intermittent overload conditions.
AC-DC Adapters	Industrial Power Supplies
Use Scenario: Output rectification in compact wall adapters powering IoT gateways and embedded controllers. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates continuously at ambient temperatures up to 70°C. Use Value: SOD-123HE package fits tight board spacing; 5µA I_R at 25°C maintains low no-load power draw.	Use Scenario: Input-stage bridge rectification or hold-up capacitor charging in DIN-rail mounted 24V/48V PSUs. IC Role / Device Role / Timing Role: Handles line-frequency rectification with margin for voltage spikes and harmonics. Use Value: R_θJL = 46°C/W enables direct thermal coupling to copper pour, reducing need for external heatsinks.

DC-DC Converters

Switching Inverters

Use Scenario: Secondary-side rectification in isolated buck-boost or flyback converters operating at 100–500 kHz.

IC Role / Device Role / Timing Role: Standard recovery rectifier conducting unidirectional current during transformer demagnetization phase.

Use Value: 1.2A I_F and 200V V_RRM match typical 12–48V output stages; low V_F minimizes heat generation in sealed enclosures.

Use Scenario: Freewheeling or anti-parallel diode in half-bridge motor drive inverters for HVAC or industrial pumps.

IC Role / Device Role / Timing Role: Provides safe commutation path for inductive kickback during MOSFET turn-off.

Use Value: 50A I_FSM handles short-circuit surges; 175°C T_J(max) ensures reliability under intermittent overload conditions.

AC-DC Adapters

Industrial Power Supplies

Use Scenario: Output rectification in compact wall adapters powering IoT gateways and embedded controllers.

IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates continuously at ambient temperatures up to 70°C.

Use Value: SOD-123HE package fits tight board spacing; 5µA I_R at 25°C maintains low no-load power draw.

Use Scenario: Input-stage bridge rectification or hold-up capacitor charging in DIN-rail mounted 24V/48V PSUs.

IC Role / Device Role / Timing Role: Handles line-frequency rectification with margin for voltage spikes and harmonics.

Use Value: R_θJL = 46°C/W enables direct thermal coupling to copper pour, reducing need for external heatsinks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR120	200V V_RRM, 1A I_F, 30A I_FSM, DO-41 package	Higher thermal mass but larger footprint; lower surge rating	Select when through-hole mounting or higher surge margin is not required
Vishay VS-1EWH02-M3/5AT	200V V_RRM, 1A I_F, 30A I_FSM, SMA package	SMA has slightly larger pad area than SOD-123HE; same moisture sensitivity level	Choose if existing SMA footprint reuse is prioritized over size reduction

Compared with MUR120 and VS-1EWH02-M3/5AT, the S1DLS delivers higher average current (1.2A vs. 1A) and superior surge capability (50A vs. 30A) in the smallest standardized SMD rectifier outline, making it optimal for next-generation compact power designs where board space and transient robustness are critical.

Availability

S1DLS is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for S1DLS 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 power, automotive, and industrial markets since 1979.

The S1DLS belongs to TSC's S1xLS standard rectifier family, engineered specifically for high-reliability, cost-optimized AC/DC and DC/DC power conversion in consumer, industrial, and infrastructure equipment.

FAQ

What is the maximum junction temperature rating for the S1DLS?

The S1DLS has a maximum junction temperature (T_J) rating of +175°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision H2103. This allows the S1DLS to operate reliably in high-ambient environments such as enclosed power supplies or industrial control cabinets where thermal management is constrained. Derating curves confirm usable current capacity down to 0.8A at 125°C case temperature.

Is the S1DLS RoHS and halogen-free compliant?

Yes, the S1DLS is fully RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the official Taiwan Semiconductor product documentation (Version H2103). The SOD-123HE package uses lead-free matte tin plating and UL 94V-0 molding compound, meeting environmental requirements for export to EU, Japan, and other regulated markets. This compliance applies directly to the S1DLS, not just the broader S1xLS family.

What does the marking code "1DLS" indicate on the S1DLS device body?

The marking code "1DLS" laser-etched on the S1DLS case identifies the exact part variant with 200V V_RRM within the S1xLS series. Per Taiwan Semiconductor's ordering information, "x" in S1xLS maps to voltage grade: D = 200V, G = 400V, J = 600V, K = 800V, M = 1000V. The S1DLS is the only variant marked "1DLS", confirming its identity and preventing mis-substitution during inspection or rework.

Can the S1DLS replace a 1N4007 in surface-mount designs?

No - the S1DLS is not a drop-in replacement for the through-hole 1N4007. While both are standard rectifiers, the S1DLS is rated for 200V V_RRM and 1.2A I_F in SOD-123HE, whereas the 1N4007 is rated for 1000V and 1A in DO-41. The S1DLS lacks the voltage margin and mechanical form factor needed for legacy 1N4007 applications. Use the S1MLS instead for 1000V compatibility in SMD format.

What is the thermal resistance from junction to ambient (R_θJA) for the S1DLS?

The S1DLS has a junction-to-ambient thermal resistance (R_θJA) of 86°C/W when mounted on a standard 5mm × 5mm copper pad PCB, as measured per JEDEC test conditions and published in the Taiwan Semiconductor datasheet (H2103). This value assumes natural convection and defines the worst-case temperature rise under full 1.2A load; actual performance improves with additional copper area or airflow. R_θJA is specific to the S1DLS and validated for its SOD-123HE package configuration.

S1DLS 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):: 200 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 @ 200 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123HE

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

S1DLS FAQ

1.How can I place an order for S1DLS through Aetrix?

Please submit a Request for Quotation (RFQ) for S1DLS 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 S1DLS reliable?

The price and inventory of S1DLS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1DLS is usually 5 days.

3.What payment methods are accepted for S1DLS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1DLS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1DLS?

S1DLS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1DLS 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 S1DLS?

For technical support, including S1DLS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1DLS requirements.

6.How does Aetrix verify that S1DLS is sourced from the original manufacturer or authorized distributors?

All S1DLS 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 S1DLS meets industry standards.

7.What is the process for return or replacement of S1DLS?

All S1DLS units undergo pre-shipment inspection (PSI). If there is an issue with S1DLS, 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 S1DLS part is unused and in its original packaging.

Return procedure for S1DLS:

1.Submit a request within 90 days.

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

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