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

Taiwan Semiconductor Corporation SDLW

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

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Part No.:: SDLW

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123W

Datasheet:: SDLW.pdf

Description:: 0.8A, 200V, STANDARD RECOVERY RE

Quantity:: RFQ Add To RFQ list

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Inventory:20,000

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Product details

Overview

SDLW from Taiwan Semiconductor is a 0.8A, 200V standard surface-mount silicon rectifier diode in SOD-123W package, featuring glass-passivated junction, 20A peak surge rating, and 150°C max junction temperature. It serves as a primary AC/DC input rectifier in compact DC-DC converters requiring reliable low-leakage, low-forward-voltage operation at moderate current.

For engineers reviewing the SDLW datasheet, SDLW pinout, SDLW application, or SDLW equivalent, key selection criteria include repetitive peak reverse voltage (200V), forward voltage at 0.8A (≤1.10V @ 25°C), reverse leakage (≤1 µA @ 25°C), thermal resistance (R_θJA = 84°C/W), and SOD-123W mechanical compatibility with automated placement.

Technical Context

The SDLW is a single-die, planar passivated silicon PN junction rectifier optimized for high-reliability, medium-voltage switching applications. Its 200V V_RRM, 0.8A average forward current, and 20A I_FSM support robust transient handling in flyback and buck-derived topologies.

Thermal performance is defined for mounting on a 5mm × 5mm copper pad: R_θJL = 30°C/W and R_θJA = 84°C/W confirm suitability for thermally constrained PCB layouts. Reverse leakage remains ≤150 µA up to 125°C, enabling stable operation in ambient temperatures up to 85°C with derating.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 120/230VAC input stages.
I_F	0.8 A - Continuous average forward current at T_A = 75°C; defines steady-state power conversion capability.
I_FSM	20 A - Non-repetitive peak surge current (8.3 ms half-sine); withstands inrush and fault transients without failure.
V_F @ 0.8A, 25°C	≤1.10 V - Forward voltage drop determines conduction loss and thermal load in rectification path.
I_R @ 200V, 25°C	≤1 µA - Low reverse leakage minimizes standby power loss and improves efficiency in no-load conditions.
T_J max	+150°C - Maximum junction temperature enables operation in sealed or high-ambient environments with appropriate PCB thermal design.
R_θJA	84°C/W - Junction-to-ambient thermal resistance on standard 5mm × 5mm Cu pad; used to calculate temperature rise under load.

Pinout & Package

Package: SOD-123W - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode band polarity marking, and JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry node	Connected to AC input or transformer secondary; must handle 0.8A continuous and 20A surge.
Cathode	Forward current exit node / reverse voltage reference	Connected to output capacitor or switching node; marked by visible cathode band for orientation assurance.

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term reliability and moisture resistance; eliminates need for conformal coating in humid environments.
Moisture sensitivity level 1	Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without floor-life constraints.
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations; supports green manufacturing and export compliance.
SOD-123W footprint	Standardized 2.7 × 1.6 mm outline with 1.27 mm lead pitch; ensures compatibility with existing pick-and-place tooling and stencil designs.

Applications

AC/DC Adapter Input Rectification	Isolated Flyback Secondary Side
Use Scenario: Converts 120/230VAC mains to unregulated DC bus in wall-wart adapters with <5W output. IC Role / Device Role / Timing Role: Primary unidirectional current path during positive half-cycle; blocks reverse voltage during negative half-cycle. Use Value: 200V V_RRM provides 2× safety margin over 120VAC peak (170V), while 0.8A I_F supports typical adapter loads up to 4W.	Use Scenario: Rectifies high-frequency transformer output in isolated flyback converters for industrial sensors. IC Role / Device Role / Timing Role: Synchronous rectification alternative where low-cost, fixed-timing passive rectification suffices. Use Value: Low 1.10V V_F limits conduction loss at 0.8A, and 150°C T_Jmax accommodates enclosure temperatures up to 85°C.
USB-C PD Auxiliary Power Path	Industrial PLC Digital Input Protection
Use Scenario: Provides reverse-polarity protection and EMI filtering feed in auxiliary 5V/3.3V rails of USB-C PD sink controllers. IC Role / Device Role / Timing Role: Unidirectional clamp between input and local LDO; blocks backfeed from downstream circuitry. Use Value: 1 µA I_R at 25°C prevents loading of low-power monitoring circuits; SOD-123W size fits tight layout constraints near USB-C connectors.	Use Scenario: Protects 24V digital input channels from field-wiring reversals and inductive kickback in programmable logic controllers. IC Role / Device Role / Timing Role: Polarity guard diode placed upstream of optocoupler input; conducts only during miswiring events. Use Value: 20A I_FSM safely clamps 100ms inductive transients; glass passivation ensures stability across 10+ year field deployments.

AC/DC Adapter Input Rectification

Isolated Flyback Secondary Side

Use Scenario: Converts 120/230VAC mains to unregulated DC bus in wall-wart adapters with <5W output.

IC Role / Device Role / Timing Role: Primary unidirectional current path during positive half-cycle; blocks reverse voltage during negative half-cycle.

Use Value: 200V V_RRM provides 2× safety margin over 120VAC peak (170V), while 0.8A I_F supports typical adapter loads up to 4W.

Use Scenario: Rectifies high-frequency transformer output in isolated flyback converters for industrial sensors.

IC Role / Device Role / Timing Role: Synchronous rectification alternative where low-cost, fixed-timing passive rectification suffices.

Use Value: Low 1.10V V_F limits conduction loss at 0.8A, and 150°C T_Jmax accommodates enclosure temperatures up to 85°C.

USB-C PD Auxiliary Power Path

Industrial PLC Digital Input Protection

Use Scenario: Provides reverse-polarity protection and EMI filtering feed in auxiliary 5V/3.3V rails of USB-C PD sink controllers.

IC Role / Device Role / Timing Role: Unidirectional clamp between input and local LDO; blocks backfeed from downstream circuitry.

Use Value: 1 µA I_R at 25°C prevents loading of low-power monitoring circuits; SOD-123W size fits tight layout constraints near USB-C connectors.

Use Scenario: Protects 24V digital input channels from field-wiring reversals and inductive kickback in programmable logic controllers.

IC Role / Device Role / Timing Role: Polarity guard diode placed upstream of optocoupler input; conducts only during miswiring events.

Use Value: 20A I_FSM safely clamps 100ms inductive transients; glass passivation ensures stability across 10+ year field deployments.

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 MURS0820T3G	Ultrafast recovery (t_rr = 25 ns), higher V_F (1.25V @ 0.8A), same SOD-123W package	Better suited for high-frequency SMPS (>100 kHz) where reverse recovery loss dominates	Select MURS0820T3G when switching frequency exceeds 50 kHz and lower t_rr is required; SDLW preferred for cost-sensitive, <50 kHz applications.
Vishay VS-2EY20-M3/54	Same 200V V_RRM, 0.8A I_F, but in SMA package (larger footprint, higher R_θJA = 100°C/W)	Requires PCB redesign due to different pad layout and thermal profile	Choose VS-2EY20-M3/54 only if legacy SMA footprint must be retained; SDLW offers superior thermal performance and smaller area in SOD-123W.

Compared with MURS0820T3G and VS-2EY20-M3/54, the SDLW delivers optimal balance of cost, thermal efficiency (R_θJA = 84°C/W), and manufacturability (MSL-1, SOD-123W) for general-purpose 200V rectification below 50 kHz, without ultrafast timing requirements.

Availability

SDLW is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose power supply designs requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for SDLW 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 industrial, computing, and consumer markets since 1979.

The SDLW belongs to TSC's SxLW family of standard rectifiers-designed specifically for cost-effective, high-yield SMT deployment in space-constrained AC/DC and DC/DC power stages.

FAQ

What is the maximum repetitive peak reverse voltage rating for the SDLW?

The SDLW has a maximum repetitive peak reverse voltage (V_RRM) rating of 200 V. This value is explicitly specified in the Absolute Maximum Ratings table for the SDLW variant and defines the highest reverse voltage the device can block repeatedly without breakdown. It is critical for ensuring safe operation in 120VAC line applications where peak voltage reaches ~170V, providing necessary design margin.

Does the SDLW meet RoHS and halogen-free requirements?

Yes, the SDLW is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance statements are confirmed in the official Taiwan Semiconductor documentation for the SDLW – SMLW series. The device uses matte tin-plated leads and halogen-free molding compound, supporting environmentally regulated manufacturing and export requirements without requiring material declarations beyond standard compliance documentation.

What is the forward voltage drop of the SDLW at 0.8A and 25°C?

The forward voltage drop (V_F) of the SDLW is guaranteed to be ≤1.10 V at 0.8A and 25°C, as stated in the Electrical Specifications table. This maximum value reflects worst-case conduction loss under nominal conditions and is used for thermal and efficiency calculations in power supply designs. Typical V_F at this condition is 0.94 V, per the same datasheet.

What is the moisture sensitivity level (MSL) of the SDLW?

The SDLW has a moisture sensitivity level (MSL) of Level 1 per J-STD-020. This means the device may be stored indefinitely at ambient conditions (<30°C / 60% RH) without baking prior to reflow soldering. No floor life limitation applies, simplifying SMT line integration and eliminating pre-reflow bake steps in standard manufacturing processes.

What package type does the SDLW use, and what are its key mechanical attributes?

The SDLW uses the SOD-123W surface-mount package. Key mechanical attributes include a 2.7 mm × 1.6 mm body, 1.27 mm lead pitch, matte tin-plated leads compliant with J-STD-002, UL 94V-0 flammability rating, and cathode band polarity marking. Its weight is approximately 0.016 g, and it meets JESD201 Class 2 whisker resistance requirements.

SDLW 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):: 200 V

Current - Average Rectified (Io):: 800mA

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 800 mA

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

Reverse Recovery Time (trr):: -

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

Capacitance @ Vr, F:: 7pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123W

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

SDLW FAQ

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

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

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

3.What payment methods are accepted for SDLW?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SDLW?

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

Once your SDLW 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 SDLW?

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

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

All SDLW 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 SDLW meets industry standards.

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

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

Return procedure for SDLW:

1.Submit a request within 90 days.

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

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