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

Taiwan Semiconductor Corporation HS1MAL

Name: HS1MAL
Brand: Taiwan Semiconductor Corporation
SKU: HS1MAL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HS1MAL

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: HS1MAL.pdf

Description:: DIODE GEN PURP 1KV 1A THIN SMA

Quantity:: RFQ Add To RFQ list

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Inventory:5,838

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Product details

Overview

HS1MAL from Taiwan Semiconductor is a 1 A, 1000 V high-efficiency surface-mount silicon rectifier diode in a Thin SMA package, featuring 1.49 V max forward voltage at 1 A and 25°C, 75 ns reverse recovery time, and 8 pF junction capacitance - deployed in high-frequency switching mode power supplies and freewheeling paths.

For engineers reviewing the HS1MAL datasheet, HS1MAL pinout, HS1MAL application, or HS1MAL equivalent, key selection criteria include peak reverse voltage rating (1000 V), thermal resistance (R_θJL = 29 °C/W), low-profile SMT compatibility, and temperature-stable forward voltage performance up to 150°C junction.

Technical Context

The HS1MAL is a single-die, glass-passivated, fast-recovery rectifier optimized for high-frequency DC–DC conversion and switching inverters. Its 1000 V V_RRM, 35 A I_FSM (8.3 ms), and 75 ns t_rr support robust surge handling and reduced switching losses in compact layouts.

Thermal design is enabled by R_θJL = 29 °C/W and R_θJA = 51 °C/W on a 5 mm × 5 mm Cu pad, while its J-STD-020 Level 1 moisture sensitivity and matte tin-plated leads ensure reliability in automated assembly and long-term solderability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports input stages in universal AC/DC front-ends and high-voltage DC link applications
I_F	1 A continuous - rated for sustained conduction in auxiliary rails and low-power SMPS outputs
t_rr	75 ns - enables operation up to ~5 MHz switching frequencies with minimal reverse recovery loss
V_F @ 1 A, 25°C	1.49 V max - defines conduction loss budget in thermally constrained PCB areas
C_J	8 pF - reduces capacitive coupling and EMI in high-dV/dt node placements
R_θJL	29 °C/W - allows direct thermal path to PCB copper, simplifying heatsinking in space-limited designs
T_J max	+150°C - permits operation in sealed enclosures or near hot components without derating

Pinout & Package

Package: Thin SMA - low-profile surface-mount package with cathode band marking, 0.029 g weight, UL 94V-0 molding compound, and JESD 201 Class 2 whisker-resistant matte tin leads.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential side of load or switch node; requires adequate trace width for 1 A RMS
Cathode	Current exit point during forward conduction; marked by band	Connected to higher-potential rail (e.g., output capacitor positive or switch drain); polarity-critical for rectification

Key Features

Feature	Design Value
Glass passivated chip junction	Enhances humidity resistance and long-term reliability under thermal cycling and bias stress
Fast switching (75 ns t_rr)	Reduces switching loss and improves efficiency in >100 kHz SMPS topologies
Low profile Thin SMA package	Enables stacking in ultra-thin power modules and height-constrained consumer adapters
J-STD-020 Level 1 moisture sensitivity	Eliminates bake requirements before reflow, supporting standard SMT line throughput
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental directives for industrial and consumer shipments

Applications

DC–DC Converter	Switching Inverter
Use Scenario: Secondary-side synchronous rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current steering diode enabling energy transfer during transformer reset phase. Use Value: 1000 V V_RRM provides margin against reflected transients; 75 ns t_rr minimizes dead-time loss in quasi-resonant designs.	Use Scenario: DC link freewheeling path in single-phase motor drive inverters operating from 400–800 V DC bus. IC Role / Device Role / Timing Role: Clamp diode conducting reverse current during IGBT turn-off commutation. Use Value: 35 A I_FSM withstands short-circuit surges; 150°C T_J max ensures stability near heat-generating power stages.
AC/DC Adapter	Industrial Power Supply
Use Scenario: Input bridge rectification in universal-input (85–265 V_AC) wall adapters with active PFC. IC Role / Device Role / Timing Role: High-voltage leg rectifier handling peak line voltages exceeding 370 V. Use Value: 1000 V V_RRM accommodates line surges and PFC ripple; 8 pF C_J limits capacitive EMI injection into EMI filters.	Use Scenario: Output rectification in telecom-grade 48 V/1 A backup power modules with forced-air cooling. IC Role / Device Role / Timing Role: Primary output diode in non-isolated buck-derived hold-up stage. Use Value: R_θJL = 29 °C/W enables direct thermal coupling to heatsinked PCB zones; 1.49 V V_F limits conduction loss to <1.5 W at full load.

DC–DC Converter

Switching Inverter

Use Scenario: Secondary-side synchronous rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A.

IC Role / Device Role / Timing Role: Unidirectional current steering diode enabling energy transfer during transformer reset phase.

Use Value: 1000 V V_RRM provides margin against reflected transients; 75 ns t_rr minimizes dead-time loss in quasi-resonant designs.

Use Scenario: DC link freewheeling path in single-phase motor drive inverters operating from 400–800 V DC bus.

IC Role / Device Role / Timing Role: Clamp diode conducting reverse current during IGBT turn-off commutation.

Use Value: 35 A I_FSM withstands short-circuit surges; 150°C T_J max ensures stability near heat-generating power stages.

AC/DC Adapter

Industrial Power Supply

Use Scenario: Input bridge rectification in universal-input (85–265 V_AC) wall adapters with active PFC.

IC Role / Device Role / Timing Role: High-voltage leg rectifier handling peak line voltages exceeding 370 V.

Use Value: 1000 V V_RRM accommodates line surges and PFC ripple; 8 pF C_J limits capacitive EMI injection into EMI filters.

Use Scenario: Output rectification in telecom-grade 48 V/1 A backup power modules with forced-air cooling.

IC Role / Device Role / Timing Role: Primary output diode in non-isolated buck-derived hold-up stage.

Use Value: R_θJL = 29 °C/W enables direct thermal coupling to heatsinked PCB zones; 1.49 V V_F limits conduction loss to <1.5 W at full load.

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	600 V V_RRM, 1.15 V V_F @ 1 A, 50 ns t_rr, DO-214AC package	Limited to ≤600 V systems; faster recovery but lower voltage margin	Select when system peak reverse voltage stays below 600 V and lowest possible t_rr is prioritized over voltage headroom
SB1100	1000 V V_RRM, 1.7 V V_F @ 1 A, 100 ns t_rr, SMA package	Higher forward drop increases conduction loss; slower recovery raises switching loss	Choose only if cost sensitivity outweighs efficiency targets and layout allows larger thermal footprint

Compared with STTH1R06 and SB1100, the HS1MAL uniquely balances 1000 V capability, 75 ns recovery, and 1.49 V forward drop in a Thin SMA footprint - making it optimal for space-constrained, high-input-voltage SMPS where both voltage margin and switching efficiency matter.

Availability

HS1MAL is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle availability.

Supply support for HS1MAL 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 HS1MAL belongs to TSC's HS1xAL high-voltage rectifier family, engineered specifically for high-frequency, high-efficiency switching power conversion in compact SMT form factors.

FAQ

What is the maximum repetitive peak reverse voltage rating for HS1MAL?

The HS1MAL has a maximum repetitive peak reverse voltage (V_RRM) rating of 1000 V, verified per the manufacturer's absolute maximum ratings table. This rating defines the highest transient reverse voltage the device can block repeatedly without breakdown, making HS1MAL suitable for use in 800 V DC bus systems with safety margin. The 1000 V rating is specific to HS1MAL and differs from lower-voltage variants like HS1DAL (200 V) or HS1KAL (800 V).

What is the forward voltage drop of HS1MAL at 1 A and 25°C?

The HS1MAL exhibits a maximum forward voltage (V_F) of 1.49 V at 1 A and 25°C, as specified in the electrical characteristics table. At elevated temperatures (125°C), this drops to 1.16 V max, reflecting the negative temperature coefficient of silicon diodes. This V_F value directly determines conduction loss in the application - for example, 1.49 W dissipation at 1 A - and must be included in thermal design calculations for the HS1MAL.

Does HS1MAL have a defined reverse recovery time, and how is it measured?

Yes, the HS1MAL has a typical reverse recovery time (t_rr) of 75 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is confirmed for HS1JAL, HS1KAL, and HS1MAL variants in the datasheet's electrical specifications section. The 75 ns t_rr enables efficient operation in switching frequencies up to several megahertz, reducing switching losses compared to slower general-purpose rectifiers.

What package type does HS1MAL use, and what are its mechanical highlights?

The HS1MAL uses the Thin SMA package - a low-profile surface-mount variant of the DO-214AC outline. Key mechanical attributes include a 0.029 g mass, UL 94V-0 compliant molding compound, matte tin-plated leads qualified per J-STD-002, and JESD 201 Class 2 whisker resistance. Polarity is indicated by a cathode band, and the package is rated J-STD-020 Level 1 for moisture sensitivity - eliminating pre-bake requirements prior to reflow.

What is the junction-to-lead thermal resistance (R_θJL) of HS1MAL, and why does it matter?

The HS1MAL has a junction-to-lead thermal resistance (R_θJL) of 29 °C/W, measured with the device mounted on a 5 mm × 5 mm copper pad per JEDEC standards. This parameter quantifies how effectively heat flows from the silicon die to the PCB copper via the leads. A low R_θJL like 29 °C/W allows effective passive cooling without external heatsinks - critical for maintaining the HS1MAL's 150°C maximum junction temperature in compact, sealed power modules.

HS1MAL Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-221AC, SMA Flat Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 1 A

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

Reverse Recovery Time (trr):: 75 ns

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

Capacitance @ Vr, F:: 8pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Thin SMA

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

HS1MAL FAQ

1.How can I place an order for HS1MAL through Aetrix?

Please submit a Request for Quotation (RFQ) for HS1MAL 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 HS1MAL reliable?

The price and inventory of HS1MAL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS1MAL is usually 5 days.

3.What payment methods are accepted for HS1MAL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS1MAL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HS1MAL?

HS1MAL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HS1MAL 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 HS1MAL?

For technical support, including HS1MAL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS1MAL requirements.

6.How does Aetrix verify that HS1MAL is sourced from the original manufacturer or authorized distributors?

All HS1MAL 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 HS1MAL meets industry standards.

7.What is the process for return or replacement of HS1MAL?

All HS1MAL units undergo pre-shipment inspection (PSI). If there is an issue with HS1MAL, 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 HS1MAL part is unused and in its original packaging.

Return procedure for HS1MAL:

1.Submit a request within 90 days.

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

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