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

Taiwan Semiconductor Corporation HSMLW

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

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Part No.:: HSMLW

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123W

Datasheet:: HSMLW.pdf

Description:: 75NS, 0.8A, 1000V, HIGH EFFICIEN

Quantity:: RFQ Add To RFQ list

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Inventory:19,750

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Product details

Overview

HSMLW from Taiwan Semiconductor is a 1000V, 0.8A surface-mount high-efficiency rectifier diode in SOD-123W package, featuring glass passivated junction, 1.30V max forward voltage at 0.8A/25°C, and 75ns reverse recovery time-designed for freewheeling and switching-mode DC/DC converter applications.

For engineers reviewing the HSMLW datasheet, HSMLW pinout, HSMLW application, or HSMLW equivalent, key selection criteria include peak reverse voltage rating (1000V), thermal resistance (R_θJA = 86°C/W), junction temperature limit (+150°C), and SOD-123W mechanical compatibility with automated placement.

Technical Context

The HSMLW is a single-die, silicon planar epitaxial fast recovery rectifier optimized for high-voltage switching power supplies. Its 1000V V_RRM, 20A I_FSM, and 75ns trr support robust operation under repetitive surge and high-frequency commutation.

Thermal performance is defined for mounting on a 5mm × 5mm copper pad: R_θJL = 34°C/W and R_θJC = 35°C/W confirm efficient heat transfer from junction to lead and case-critical for sustained 0.8A conduction in compact industrial converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports input stages in 800V AC-line or 600V DC bus systems without derating
I_F	0.8 A continuous - suitable for low-to-medium power SMPS outputs up to ~15W
I_FSM	20 A (8.3ms half-sine) - withstands inrush and transient overloads in converter startup
t_rr	75 ns - enables operation up to ~2 MHz switching frequency with low switching loss
V_F @ 0.8A/25°C	1.30 V max - limits conduction loss to ≤1.04 W at full rated current
R_θJA	86 °C/W - requires minimal PCB copper area for thermal management in space-constrained layouts
Junction temp	+150 °C max - allows operation in sealed enclosures or high ambient environments

Pinout & Package

SOD-123W is a low-profile, surface-mount plastic package with cathode band marking; terminals are matte tin-plated, J-STD-002 solderable, and moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential node (e.g., switch node in buck freewheel path)
Cathode	Current exit point during forward conduction; marked by band	Connected to higher-potential rail (e.g., output capacitor positive terminal)

Key Features

Feature	Design Value
Glass passivated junction	Ensures long-term reliability and stable leakage current (<1 µA @ 25°C, <150 µA @ 125°C) across humidity and thermal cycling
Low-profile SOD-123W package	Enables ultra-thin power stage designs (max height 1.1 mm) while maintaining 1000V isolation
Fast recovery (75 ns)	Reduces reverse recovery charge (Q_rr) and associated switching losses in hard-switched topologies
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and UL 94V-0 flammability requirements for industrial and consumer end equipment

Applications

DC/DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–12 V at ≤0.8 A. IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer secondary to regulated DC output. Use Value: 1000V V_RRM provides margin against reflected transients; 1.30V V_F max ensures ≥85% efficiency at light-to-moderate loads.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters. IC Role / Device Role / Timing Role: Clamp diode providing low-impedance return path during switch-off, suppressing voltage spikes. Use Value: 75ns t_rr minimizes tail current and associated EMI; 20A I_FSM handles peak inductive kick energy safely.
AC-DC Adapter Input Bridge Leg	Industrial Power Supply Snubber Network
Use Scenario: Single-leg replacement in compact 200–300W universal-input AC-DC adapters using discrete bridge configurations. IC Role / Device Role / Timing Role: High-voltage rectifying element conducting during positive half-cycle of rectified AC waveform. Use Value: 1000V rating accommodates 265V AC line peaks plus safety margin; SOD-123W footprint simplifies layout versus TO-220 alternatives.	Use Scenario: RC snubber clamp diode in IGBT gate drive or main power stage protection circuits. IC Role / Device Role / Timing Role: Fast-turn-on path to divert transient energy away from sensitive control nodes. Use Value: Low C_J (5 pF) preserves snubber timing accuracy; glass passivation ensures stable breakdown behavior under repeated stress.

DC/DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–12 V at ≤0.8 A.

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

Use Value: 1000V V_RRM provides margin against reflected transients; 1.30V V_F max ensures ≥85% efficiency at light-to-moderate loads.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters.

IC Role / Device Role / Timing Role: Clamp diode providing low-impedance return path during switch-off, suppressing voltage spikes.

Use Value: 75ns t_rr minimizes tail current and associated EMI; 20A I_FSM handles peak inductive kick energy safely.

AC-DC Adapter Input Bridge Leg

Industrial Power Supply Snubber Network

Use Scenario: Single-leg replacement in compact 200–300W universal-input AC-DC adapters using discrete bridge configurations.

IC Role / Device Role / Timing Role: High-voltage rectifying element conducting during positive half-cycle of rectified AC waveform.

Use Value: 1000V rating accommodates 265V AC line peaks plus safety margin; SOD-123W footprint simplifies layout versus TO-220 alternatives.

Use Scenario: RC snubber clamp diode in IGBT gate drive or main power stage protection circuits.

IC Role / Device Role / Timing Role: Fast-turn-on path to divert transient energy away from sensitive control nodes.

Use Value: Low C_J (5 pF) preserves snubber timing accuracy; glass passivation ensures stable breakdown behavior under repeated stress.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	600V V_RRM, 1A I_F, 75ns t_rr, DO-214AA package	Limited to ≤600V systems; higher current rating but larger footprint and higher R_θJA	Select when 1A rating is required and board space permits larger package
ES1J	600V V_RRM, 1A I_F, 35ns t_rr, SMA package	Faster recovery but lower voltage rating; not suitable for 1000V designs	Prefer where ultra-fast recovery dominates over voltage margin, e.g., resonant LLC secondaries

Compared with STTH1R06 and ES1J, the HSMLW uniquely delivers 1000V capability in SOD-123W-enabling compact, high-input-voltage designs where both voltage headroom and board area are constrained.

Availability

HSMLW is available at Aetrix Electronics and suitable for DC/DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for HSMLW 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 HSMLW belongs to TSC's HSxLW high-voltage rectifier family, engineered specifically for space-constrained, high-efficiency power conversion where voltage resilience, thermal performance, and automated assembly compatibility are critical.

FAQ

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

The HSMLW has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table. This rating applies under standard test conditions (T_A = 25°C) and defines the highest reverse voltage the device can block repeatedly without breakdown. It is the defining parameter distinguishing HSMLW from lower-voltage variants like HSDLW (200V) or HSKLW (800V) in the same family.

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

The HSMLW exhibits a maximum forward voltage (V_F) of 1.30 V at 0.8 A and 25°C, per the Electrical Specifications table. At 125°C junction temperature, V_F drops to 1.09–1.30 V range, reflecting silicon's negative temperature coefficient. This value directly determines conduction loss: at 0.8 A, worst-case power dissipation is 1.04 W, guiding thermal design decisions.

Is HSMLW suitable for surface-mount reflow assembly?

Yes, HSMLW is qualified for surface-mount reflow assembly. Its SOD-123W package features matte tin-plated leads compliant with J-STD-002, moisture sensitivity level 1 (per J-STD-020), and is rated for standard Pb-free reflow profiles. The low-profile design and standardized footprint ensure compatibility with high-speed pick-and-place machines and automated optical inspection.

What is the reverse recovery time (t_rr) of HSMLW and how does it impact switching performance?

The HSMLW has a reverse recovery time (t_rr) of 75 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This fast recovery reduces switching losses and EMI generation in high-frequency converters. Compared to slower rectifiers, the 75 ns t_rr enables reliable operation up to ~2 MHz in hard-switched topologies without excessive diode-induced ringing or shoot-through risk.

Does HSMLW have any environmental compliance certifications?

Yes, HSMLW is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and terminals pass JESD 201 Class 2 whisker testing. These certifications are explicitly stated in the FEATURES section and verified in the Mechanical Data and Ordering Information pages of the official Taiwan Semiconductor datasheet revision C2103.

HSMLW 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:: 1.7 V @ 800 mA

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

Reverse Recovery Time (trr):: 75 ns

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

Capacitance @ Vr, F:: 5pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123W

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

HSMLW FAQ

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

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

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

3.What payment methods are accepted for HSMLW?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HSMLW?

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

Once your HSMLW 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 HSMLW?

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

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

All HSMLW 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 HSMLW meets industry standards.

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

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

Return procedure for HSMLW:

1.Submit a request within 90 days.

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

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