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

Taiwan Semiconductor Corporation S1KLWH

Name: S1KLWH
Brand: Taiwan Semiconductor Corporation
SKU: S1KLWH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1KLWH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123W

Datasheet:: S1KLWH.pdf

Description:: DIODE GEN PURP 800V 1A SOD123W

Quantity:: RFQ Add To RFQ list

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Inventory:66,095

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Product details

Overview

S1KLWH from Taiwan Semiconductor is a 1 A, 800 V repetitive peak reverse voltage standard surface-mount silicon rectifier diode in SOD-123W package, featuring 30 A peak forward surge current capability, 1.1 V max forward voltage at 1 A, and AEC-Q101 qualification for automotive-grade reliability - used in DC-DC converter snubber networks and car lighting power stages.

For engineers reviewing the S1KLWH datasheet, S1KLWH pinout, S1KLWH application, or S1KLWH equivalent, key selection criteria include verified 800 V V_RRM, thermal resistance (R_θJA = 80 °C/W), junction temperature range (–55 to +175 °C), moisture sensitivity level 1 compliance, and SOD-123W footprint compatibility with automated placement.

Technical Context

The S1KLWH is a single-die, unidirectional silicon PN junction rectifier optimized for high-efficiency AC-to-DC and DC-to-DC conversion. Its 800 V V_RRM rating supports operation across industrial and automotive input rails up to 560 V RMS, while its 1.1 V max forward voltage at 1 A ensures low conduction loss under continuous load.

Thermally, the device delivers R_θJL = 25 °C/W and R_θJA = 80 °C/W in standard PCB mounting, enabling reliable operation at full rated current up to +125 °C ambient when properly heatsinked. Reverse leakage remains ≤1 µA at 25 °C and ≤50 µA at 125 °C under rated 800 V reverse bias.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - supports DC bus voltages up to 560 V RMS without breakdown
I_F	1 A continuous - suitable for low-power auxiliary supplies and LED driver return paths
I_FSM	30 A (8.3 ms half-sine) - withstands inrush and transient surges in automotive load dumps
V_F max	1.1 V @ 1 A, 25 °C - limits conduction loss to ≤1.1 W at full rated current
T_J max	+175 °C - enables operation in engine-bay or under-hood environments
C_J	8 pF @ 1 MHz, 4 V - minimizes switching noise in high-frequency snubber circuits
MSL	Level 1 (J-STD-020) - allows unlimited floor life and reflow without baking

Pinout & Package

Package: SOD-123W - compact surface-mount case with matte tin-plated leads, UL 94V-0 molding compound, cathode band polarity marking, and 0.019 g mass.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry node	Connected to lower-potential side of AC source or switch node in flyback/freewheeling path
Cathode	Current exit node	Connected to output rail or ground reference; marked by visible band on body

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, HTRB, and UHAST
High surge current (30 A)	Survives 8.3 ms half-sine transients common in 12 V/24 V vehicle electrical systems
Low V_F (≤1.1 V)	Reduces power dissipation in space-constrained LED drivers and auxiliary converters
SOD-123W footprint	Enables high-density layout and compatibility with standard pick-and-place equipment
Moisture Level 1	Eliminates pre-bake requirement before reflow, reducing manufacturing overhead

Applications

DC-DC Converter Snubber	Automotive LED Lighting
Use Scenario: Placed across MOSFET drain-source in flyback or buck-boost converters to suppress voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Passive clamping diode absorbing inductive energy and limiting dv/dt stress on power switches. Use Value: The S1KLWH's 800 V V_RRM and 30 A I_FSM ensure robust suppression of 600+ V transients without avalanche degradation.	Use Scenario: Used as freewheeling diode in constant-current LED driver circuits for headlamps and DRL modules. IC Role / Device Role / Timing Role: Provides reverse-polarity protection and current recirculation path during PWM dimming intervals. Use Value: With 1.1 V V_F max and AEC-Q101 qualification, S1KLWH maintains efficiency and long-term reliability in thermally demanding under-hood locations.
Car Interior Power Supply	Industrial Sensor Interface
Use Scenario: Rectifies low-voltage AC from small transformers or isolated gate drive windings in infotainment or ADAS control units. IC Role / Device Role / Timing Role: AC-to-DC front-end rectifier delivering stable 5–12 V bias rails for microcontrollers and CAN transceivers. Use Value: S1KLWH's 1 A I_F rating and –55 to +175 °C T_J range support uninterrupted operation across vehicle cabin temperature extremes.	Use Scenario: Integrated into 24 V industrial fieldbus interface circuits requiring reverse polarity and ESD-robust rectification. IC Role / Device Role / Timing Role: Input-stage protection diode preventing damage from miswired supply connections or induced transients. Use Value: The S1KLWH's 800 V V_RRM, 1 µA IR at 25 °C, and halogen-free construction meet IEC 61000-4-5 surge immunity and RoHS compliance requirements.

DC-DC Converter Snubber

Automotive LED Lighting

Use Scenario: Placed across MOSFET drain-source in flyback or buck-boost converters to suppress voltage spikes during switching transitions.

IC Role / Device Role / Timing Role: Passive clamping diode absorbing inductive energy and limiting dv/dt stress on power switches.

Use Value: The S1KLWH's 800 V V_RRM and 30 A I_FSM ensure robust suppression of 600+ V transients without avalanche degradation.

Use Scenario: Used as freewheeling diode in constant-current LED driver circuits for headlamps and DRL modules.

IC Role / Device Role / Timing Role: Provides reverse-polarity protection and current recirculation path during PWM dimming intervals.

Use Value: With 1.1 V V_F max and AEC-Q101 qualification, S1KLWH maintains efficiency and long-term reliability in thermally demanding under-hood locations.

Car Interior Power Supply

Industrial Sensor Interface

Use Scenario: Rectifies low-voltage AC from small transformers or isolated gate drive windings in infotainment or ADAS control units.

IC Role / Device Role / Timing Role: AC-to-DC front-end rectifier delivering stable 5–12 V bias rails for microcontrollers and CAN transceivers.

Use Value: S1KLWH's 1 A I_F rating and –55 to +175 °C T_J range support uninterrupted operation across vehicle cabin temperature extremes.

Use Scenario: Integrated into 24 V industrial fieldbus interface circuits requiring reverse polarity and ESD-robust rectification.

IC Role / Device Role / Timing Role: Input-stage protection diode preventing damage from miswired supply connections or induced transients.

Use Value: The S1KLWH's 800 V V_RRM, 1 µA IR at 25 °C, and halogen-free construction meet IEC 61000-4-5 surge immunity and RoHS compliance 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 Semi MUR108	Same 800 V V_RRM, but 1 A average current, 50 A I_FSM, TO-220AC package	Requires through-hole mounting and heatsinking; higher surge margin but larger footprint	Choose for higher surge tolerance where board space permits and thermal management is available
Vishay VS-1N4007-M3/54	1 A, 1000 V V_RRM, DO-41 package, no AEC-Q101 qualification	Through-hole only; not automotive-qualified; higher V_F (~1.1 V typ, but wider distribution)	Choose for cost-sensitive non-automotive general-purpose use where SOD-123W footprint is not required

Compared with MUR108 and VS-1N4007-M3/54, the S1KLWH uniquely combines AEC-Q101 qualification, SOD-123W surface-mount compatibility, and guaranteed 1.1 V V_F max - making it optimal for space-constrained, automotive-grade rectification where reliability and manufacturability are jointly critical.

Availability

S1KLWH is available at Aetrix Electronics and suitable for DC-DC converter snubbers, automotive LED lighting systems, and industrial sensor interfaces requiring stable component supply, consistent parametric performance, and automotive-grade traceability.

Supply support for S1KLWH 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 automotive, industrial, and consumer markets since 1979.

The S1KLWH belongs to TSC's AEC-Q101-qualified SOD-123W rectifier family, engineered specifically for high-reliability, high-surge, surface-mount power conversion in automotive and harsh-environment applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S1KLWH?

The S1KLWH has a maximum repetitive peak reverse voltage (V_RRM) of 800 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2109). This rating defines the highest reverse voltage the diode can block continuously without breakdown under specified thermal conditions, and is strictly validated for the S1KLWH variant - not extrapolated from adjacent part numbers.

Is the S1KLWH qualified for automotive applications?

Yes, the S1KLWH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This qualification covers stress testing including high-temperature operating life (HTOL), temperature cycling (TC), high-temperature reverse bias (HTRB), and unbiased highly accelerated stress test (UHAST), confirming suitability for automotive power electronics such as LED lighting and DC-DC converters.

What package type does the S1KLWH use, and what are its key mechanical features?

The S1KLWH uses the SOD-123W surface-mount package, featuring matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability-rated molding compound, cathode band polarity marking, and JESD 201 Class 2 whisker resistance. Its weight is approximately 0.019 g, and it meets moisture sensitivity level 1 per J-STD-020.

What is the forward voltage (V_F) specification for the S1KLWH at rated current?

The S1KLWH has a maximum forward voltage (V_F) of 1.1 V at 1 A forward current and 25 °C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the upper limit for conduction loss - critical for thermal design in compact LED drivers and snubber circuits.

Does the S1KLWH have a specified junction-to-ambient thermal resistance (R_θJA)?

Yes, the S1KLWH has a typical junction-to-ambient thermal resistance (R_θJA) of 80 °C/W, measured under standard JEDEC PCB mounting conditions. This parameter is essential for estimating junction temperature rise under continuous 1 A operation and informs heatsinking decisions in enclosed or high-ambient-temperature applications.

S1KLWH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123W

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 800 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 1 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 800 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123W

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

S1KLWH FAQ

1.How can I place an order for S1KLWH through Aetrix?

Please submit a Request for Quotation (RFQ) for S1KLWH 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 S1KLWH reliable?

The price and inventory of S1KLWH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1KLWH is usually 5 days.

3.What payment methods are accepted for S1KLWH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1KLWH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1KLWH?

S1KLWH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1KLWH 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 S1KLWH?

For technical support, including S1KLWH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1KLWH requirements.

6.How does Aetrix verify that S1KLWH is sourced from the original manufacturer or authorized distributors?

All S1KLWH 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 S1KLWH meets industry standards.

7.What is the process for return or replacement of S1KLWH?

All S1KLWH units undergo pre-shipment inspection (PSI). If there is an issue with S1KLWH, 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 S1KLWH part is unused and in its original packaging.

Return procedure for S1KLWH:

1.Submit a request within 90 days.

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

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