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

Taiwan Semiconductor Corporation SMLW

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

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Part No.:: SMLW

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123W

Datasheet:: SMLW.pdf

Description:: 0.8A, 1000V, STANDARD RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:20,000

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Product details

Overview

SMLW from Taiwan Semiconductor is a 1000 V repetitive peak reverse voltage, 0.8 A average forward current standard surface-mount silicon rectifier diode in SOD-123W package, featuring glass passivated junction, 20 A peak surge capability, and 150 °C maximum junction temperature - used in DC-DC converters and switching-mode inverters.

For engineers reviewing the SMLW datasheet, SMLW pinout, SMLW application, or SMLW equivalent, key selection criteria include verified V_RRM = 1000 V, I_F = 0.8 A, V_F ≤ 1.10 V at 0.8 A/25°C, thermal resistance R_θJA = 84 °C/W, and SOD-123W mechanical compatibility with automated placement.

Technical Context

The SMLW is a single-die, unidirectional standard recovery rectifier optimized for high-voltage, low-current switching power supplies. Its glass-passivated junction ensures stable reverse leakage (≤1 µA at 25°C, ≤150 µA at 125°C) and robust moisture resistance (J-STD-020 Level 1).

Thermal performance is characterized with R_θJL = 30 °C/W and R_θJC = 31 °C/W on a 5 mm × 5 mm copper pad PCB, supporting reliable operation up to T_J = 150 °C under continuous 0.8 A conduction with appropriate derating.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in high-voltage DC-DC stages
I_F	0.8 A - Continuous average forward current rating at T_A = 75°C; determines steady-state power handling
I_FSM	20 A - Non-repetitive peak surge current (8.3 ms half-sine); supports inrush and transient overload tolerance
V_F	1.10 V max @ 0.8 A, 25°C - Forward voltage drop directly impacts conduction loss and thermal design margin
R_θJA	84 °C/W - Junction-to-ambient thermal resistance on standard test board; used to calculate temperature rise under load
C_J	7 pF @ 1 MHz, 4 V - Junction capacitance affects high-frequency switching noise and snubber design

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 point	Connected to lower-potential side of circuit; must withstand full reverse voltage when off
Cathode	Forward current exit point	Marked by band; connected to higher-potential side; carries full forward current and reverse leakage

Key Features

Feature	Design Value
Glass passivated junction	Enables stable IR ≤ 1 µA at 25°C and ≤150 µA at 125°C under rated V_RRM, improving long-term reliability in humid environments
SOD-123W package	Supports automated pick-and-place assembly and meets IPC/JEDEC moisture sensitivity Level 1 (unlimited floor life)
RoHS & halogen-free compliance	Fulfills IEC 61249-2-21 and EU RoHS Directive requirements for environmentally constrained industrial and consumer applications
Junction temperature range	–55°C to +150°C operation enables use in automotive under-hood and industrial ambient conditions without derating penalties

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V output from 300–400 V bus. IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 1000 V V_RRM provides sufficient margin against reflected transients and ringing in 400 V nominal systems.	Use Scenario: Output stage rectification in single-phase H-bridge inverters driving induction motors or LED arrays. IC Role / Device Role / Timing Role: Freewheeling and commutation path for inductive load current during PWM dead-time intervals. Use Value: 20 A I_FSM handles motor startup surges and short-circuit fault currents without catastrophic failure.
Industrial Power Supply	AC-DC Adapter
Use Scenario: Input rectification in universal-input (85–265 V_AC) offline SMPS for PLC modules and sensor transmitters. IC Role / Device Role / Timing Role: Bridge or single-diode rectifier conducting during positive half-cycles of rectified line voltage. Use Value: Glass passivation and 150 °C T_JMAX ensure stable operation in enclosed, thermally constrained enclosures.	Use Scenario: Output rectification in compact wall-mounted adapters powering IoT gateways and smart home hubs. IC Role / Device Role / Timing Role: Low-leakage, low-V_F rectifier minimizing no-load losses and improving light-load efficiency. Use Value: V_F ≤ 1.10 V at 0.8 A reduces conduction loss, while 7 pF C_J limits EMI generation at 100+ kHz switching frequencies.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V output from 300–400 V bus.

IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 1000 V V_RRM provides sufficient margin against reflected transients and ringing in 400 V nominal systems.

Use Scenario: Output stage rectification in single-phase H-bridge inverters driving induction motors or LED arrays.

IC Role / Device Role / Timing Role: Freewheeling and commutation path for inductive load current during PWM dead-time intervals.

Use Value: 20 A I_FSM handles motor startup surges and short-circuit fault currents without catastrophic failure.

Industrial Power Supply

AC-DC Adapter

Use Scenario: Input rectification in universal-input (85–265 V_AC) offline SMPS for PLC modules and sensor transmitters.

IC Role / Device Role / Timing Role: Bridge or single-diode rectifier conducting during positive half-cycles of rectified line voltage.

Use Value: Glass passivation and 150 °C T_JMAX ensure stable operation in enclosed, thermally constrained enclosures.

Use Scenario: Output rectification in compact wall-mounted adapters powering IoT gateways and smart home hubs.

IC Role / Device Role / Timing Role: Low-leakage, low-V_F rectifier minimizing no-load losses and improving light-load efficiency.

Use Value: V_F ≤ 1.10 V at 0.8 A reduces conduction loss, while 7 pF C_J limits EMI generation at 100+ kHz switching frequencies.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, I_F = 1.0 A, V_F = 1.15 V @ 1 A, SOD-123 package	Limited to ≤600 V circuits; higher forward drop increases conduction loss at same current	Select when 600 V rating suffices and higher I_F margin is needed over SMLW
SS110	V_RRM = 1000 V, I_F = 1.0 A, V_F = 0.85 V @ 1 A, SMA package	Larger SMA footprint; lower V_F improves efficiency but requires PCB layout change	Choose for improved efficiency where board space allows SMA and thermal design accommodates higher I_F

Compared with STTH1R06 and SS110, the SMLW offers the highest voltage rating (1000 V) in the smallest SOD-123W footprint, making it optimal for space-constrained, high-input-voltage designs where 0.8 A forward current is sufficient and thermal budget permits its 1.10 V V_F.

Availability

SMLW is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.

Supply support for SMLW 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 SMLW belongs to TSC's SxLW family of standard rectifiers designed specifically for cost-sensitive, high-volume power conversion applications demanding reliability, JEDEC-compliant packaging, and tight parametric consistency across voltage grades.

FAQ

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

The SMLW has a maximum repetitive peak reverse voltage (V_RRM) rating of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This rating defines the highest reverse voltage the SMLW can block repeatedly without breakdown under normal operating conditions, making it suitable for high-voltage input stages in offline power supplies and inverters.

Does the SMLW have a glass passivated junction, and why does it matter?

Yes, the SMLW features a glass passivated chip junction, explicitly listed under FEATURES in the Taiwan Semiconductor documentation. This construction enhances long-term stability of reverse leakage current (IR), improves resistance to humidity and environmental contamination, and supports J-STD-020 Level 1 moisture sensitivity - critical for high-reliability manufacturing and extended field life in industrial applications using the SMLW.

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

The forward voltage drop (V_F) of the SMLW is specified as a maximum of 1.10 V at I_F = 0.8 A and T_J = 25°C, per the Electrical Specifications table. This value directly determines conduction loss and thermal dissipation in the SMLW during continuous operation, and is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects.

Which package does the SMLW use, and what are its key mechanical attributes?

The SMLW uses the SOD-123W surface-mount package, confirmed in Mechanical Data and Ordering Information sections. Key attributes include matte tin-plated leads (solderable per J-STD-002), UL 94V-0 flammability-rated molding compound, cathode band polarity marking, and JESD201 Class 2 whisker resistance - all documented for the SMLW in Taiwan Semiconductor's C2103 datasheet.

What is the peak forward surge current rating for the SMLW, and how is it defined?

The SMLW has a peak forward surge current (I_FSM) rating of 20 A, defined as a non-repetitive 8.3 ms single half-sine wave superimposed on rated load, per the Absolute Maximum Ratings table. This rating reflects the SMLW's ability to survive short-duration overcurrent events such as capacitor charging surges or motor startup currents without permanent degradation.

SMLW 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):: 1000 V

Current - Average Rectified (Io):: 800mA

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

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 1000 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

SMLW FAQ

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

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

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

3.What payment methods are accepted for SMLW?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMLW?

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

Once your SMLW 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 SMLW?

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

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

All SMLW 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 SMLW meets industry standards.

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

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

Return procedure for SMLW:

1.Submit a request within 90 days.

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

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