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

Taiwan Semiconductor Corporation S1MLH

Name: S1MLH
Brand: Taiwan Semiconductor Corporation
SKU: S1MLH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1MLH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-219AB

Datasheet:: S1MLH.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:57,517

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Product details

Overview

S1MLH from Taiwan Semiconductor is a 1 A, 1000 V repetitive peak reverse voltage (V_RRM) standard surface-mount silicon rectifier diode in Sub SMA package, featuring glass-passivated junction, AEC-Q101 qualification, and 1800 ns reverse recovery time - used in automotive snubber networks and DC-DC converter output stages.

For engineers reviewing the S1MLH datasheet, S1MLH pinout, S1MLH application, or S1MLH equivalent, key selection criteria include its 1000 V V_RRM, 30 A I_FSM, 1.1 V max forward voltage at 1 A, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 compliance.

Technical Context

The S1MLH is a single-die, unidirectional standard rectifier optimized for high-voltage, low-leakage operation in automotive and industrial power conversion. Its glass-passivated junction ensures stable reverse characteristics up to 175 °C junction temperature, and its Sub SMA package supports automated placement with matte tin-plated leads.

Thermal performance is differentiated by version: S1KLH–S1MLH exhibit 30 °C/W junction-to-lead thermal resistance (R_θJL). Reverse recovery time of 1800 ns reflects standard recovery behavior suitable for non-switching or low-frequency rectification, not fast-switching SMPS primary-side use.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - maximum repetitive reverse voltage the device blocks without breakdown
I_F	1 A continuous average forward current - defines steady-state conduction capability
I_FSM	30 A peak surge current (8.3 ms half-sine) - supports brief overloads like inrush or transient clamping
V_F max	1.1 V at 1 A, 25 °C - determines conduction loss and thermal rise in linear rectifier applications
I_R	5 µA max at 25 °C, 50 µA at 125 °C - low leakage enables stable blocking in high-impedance circuits
t_rr	1800 ns - standard recovery speed; suitable for line-frequency and low-kHz rectification, not high-frequency switching
T_J max	175 °C - high junction temperature rating supports under-hood automotive environments

Pinout & Package

Sub SMA package: surface-mount, single-anode/single-cathode configuration with cathode band marking; lead finish is matte tin per J-STD-002; weight ≈ 0.019 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connects to lower-potential side of rectified circuit; polarity must align with input source
Cathode (banded end)	Forward current exit / reverse blocking terminal	Marked by visible band; connects to higher-potential output rail; critical for correct orientation in PCB layout

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing
Glass-passivated junction	Enhances long-term stability of reverse leakage and breakdown voltage under humidity and thermal stress
Moisture sensitivity level 1	Enables direct placement without baking; eliminates pre-reflow dry storage requirements
JESD201 Class 2 whisker resistance	Prevents tin whisker growth on leads, ensuring long-term solder joint integrity in high-reliability systems
UL 94V-0 molding compound	Provides flame-retardant encapsulation required for automotive and industrial safety certifications

Applications

Automotive Snubber Networks	DC-DC Converter Output Rectification
Use Scenario: Suppressing voltage spikes across relay coils and inductive loads in vehicle body control modules. IC Role / Device Role / Timing Role: Standard rectifier used as passive clamp diode in RC snubber circuits. Use Value: 1000 V V_RRM withstands high-energy transients; 30 A I_FSM handles short-duration energy dumps without failure.	Use Scenario: Output-stage rectification in isolated 12 V → 5 V/3.3 V automotive DC-DC converters. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output after transformer secondary winding. Use Value: Low 1.1 V V_F minimizes conduction loss at 1 A load; AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient.
Car Lighting Power Supplies	Industrial AC Line Input Protection
Use Scenario: Bridge rectifier leg in LED headlamp driver front-end for 24 V commercial vehicles. IC Role / Device Role / Timing Role: Single-diode element in full-wave bridge configuration converting AC to pulsating DC. Use Value: 175 °C T_J_max supports high-temperature under-hood environments; Sub SMA footprint enables compact board layout.	Use Scenario: Input-stage rectification in industrial PLC power supplies handling 380 V AC line inputs. IC Role / Device Role / Timing Role: High-voltage standard rectifier providing DC bus for downstream filtering and regulation. Use Value: 1000 V V_RRM provides margin above 537 V peak line voltage; UL 94V-0 package meets industrial fire safety standards.

Automotive Snubber Networks

DC-DC Converter Output Rectification

Use Scenario: Suppressing voltage spikes across relay coils and inductive loads in vehicle body control modules.

IC Role / Device Role / Timing Role: Standard rectifier used as passive clamp diode in RC snubber circuits.

Use Value: 1000 V V_RRM withstands high-energy transients; 30 A I_FSM handles short-duration energy dumps without failure.

Use Scenario: Output-stage rectification in isolated 12 V → 5 V/3.3 V automotive DC-DC converters.

IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output after transformer secondary winding.

Use Value: Low 1.1 V V_F minimizes conduction loss at 1 A load; AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient.

Car Lighting Power Supplies

Industrial AC Line Input Protection

Use Scenario: Bridge rectifier leg in LED headlamp driver front-end for 24 V commercial vehicles.

IC Role / Device Role / Timing Role: Single-diode element in full-wave bridge configuration converting AC to pulsating DC.

Use Value: 175 °C T_J_max supports high-temperature under-hood environments; Sub SMA footprint enables compact board layout.

Use Scenario: Input-stage rectification in industrial PLC power supplies handling 380 V AC line inputs.

IC Role / Device Role / Timing Role: High-voltage standard rectifier providing DC bus for downstream filtering and regulation.

Use Value: 1000 V V_RRM provides margin above 537 V peak line voltage; UL 94V-0 package meets industrial fire safety standards.

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 MUR1100	1000 V V_RRM, 1 A I_F, but ultrafast (t_rr = 75 ns); higher V_F (1.7 V typ)	Better suited for high-frequency flyback snubbers; higher conduction loss in linear rectifiers	Select MUR1100 only when faster recovery is required and thermal budget allows higher V_F
Vishay VS-1EWH06-M3/5AT	600 V V_RRM, same 1 A I_F, standard recovery (t_rr ≈ 2000 ns), Sub SMA package	Limited to ≤600 V systems; identical mounting and thermal profile	Use VS-1EWH06-M3/5AT where 600 V rating suffices and cost optimization is prioritized

Compared with MUR1100 and VS-1EWH06-M3/5AT, the S1MLH offers the highest voltage rating (1000 V) among these three while maintaining standard recovery speed and lowest forward voltage - making it optimal for high-voltage, thermally constrained, automotive-qualified rectification where ultrafast switching is unnecessary.

Availability

S1MLH is available at Aetrix Electronics and suitable for automotive snubber networks, DC-DC converter output rectification, and industrial AC line input protection requiring stable component supply and AEC-Q101-compliant sourcing.

Supply support for S1MLH 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 automotive, industrial, and consumer markets since 1979.

The S1MLH belongs to TSC's AEC-Q101-qualified Sub SMA rectifier family, designed specifically for high-reliability, high-voltage rectification in harsh-environment automotive and industrial power systems.

FAQ

What is the maximum junction temperature rating for the S1MLH?

The S1MLH has a maximum junction temperature (T_J_max) of +175 °C, enabling reliable operation in high-ambient environments such as automotive engine compartments or industrial enclosures. This rating is validated per AEC-Q101 stress test conditions and supports continuous operation up to this limit when thermal design accounts for R_θJA = 85 °C/W. The S1MLH maintains specified electrical parameters within this range.

Is the S1MLH pin-compatible with other devices in the S1xLH series?

Yes - all S1xLH devices, including S1MLH, share identical Sub SMA package dimensions, pinout, and mechanical footprint. The only difference across the series is V_RRM rating (50 V to 1000 V), marked by the third character (e.g., "M" in S1MLH). No PCB layout change is needed when substituting within the series for voltage rating validation.

Does the S1MLH meet automotive qualification standards?

Yes, the S1MLH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), confirming suitability for automotive electronic control units, lighting modules, and powertrain subsystems.

What is the reverse recovery time (t_rr) of the S1MLH and what does it imply for circuit design?

The S1MLH has a reverse recovery time (t_rr) of 1800 ns under specified test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A). This confirms it is a standard-recovery rectifier - appropriate for line-frequency and low-kHz applications like snubbers and output rectification, but not recommended for high-frequency switch-mode topologies where faster recovery is required to minimize switching loss.

How is polarity indicated on the S1MLH package?

Polarity on the S1MLH is indicated by a visible cathode band on the molded case - the banded end is the cathode terminal. This marking aligns with industry-standard Sub SMA orientation and must be matched to PCB silkscreen and copper layout to ensure correct forward conduction direction. The unmarked end is the anode.

S1MLH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-219AB

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 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):: 1.8 µs

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: 9pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Sub SMA

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

S1MLH FAQ

1.How can I place an order for S1MLH through Aetrix?

Please submit a Request for Quotation (RFQ) for S1MLH 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 S1MLH reliable?

The price and inventory of S1MLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MLH is usually 5 days.

3.What payment methods are accepted for S1MLH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MLH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1MLH?

S1MLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1MLH 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 S1MLH?

For technical support, including S1MLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MLH requirements.

6.How does Aetrix verify that S1MLH is sourced from the original manufacturer or authorized distributors?

All S1MLH 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 S1MLH meets industry standards.

7.What is the process for return or replacement of S1MLH?

All S1MLH units undergo pre-shipment inspection (PSI). If there is an issue with S1MLH, 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 S1MLH part is unused and in its original packaging.

Return procedure for S1MLH:

1.Submit a request within 90 days.

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

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