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

Taiwan Semiconductor Corporation S3KH

Name: S3KH
Brand: Taiwan Semiconductor Corporation
SKU: S3KH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S3KH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S3KH.pdf

Description:: DIODE GEN PURP 800V 3A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,000

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Product details

Overview

S3KH from Taiwan Semiconductor is a surface-mount silicon rectifier diode rated for 800 V repetitive peak reverse voltage (V_RRM), 3 A average forward current (I_F), and 100 A non-repetitive surge current (I_FSM), with a maximum forward voltage of 1.15 V at 3 A and 25°C. It is used in automotive power conversion, DC-DC converters, and snubber circuits where high reliability and AEC-Q101 qualification are required.

For engineers reviewing the S3KH datasheet, S3KH pinout, S3KH application, or S3KH equivalent, key selection considerations include its DO-214AB (SMC) package, 800 V V_RRM, 1.15 V V_F @ 3 A, 1500 ns reverse recovery time, and AEC-Q101 qualification for automotive-grade deployment.

Technical Context

The S3KH is a single-die, glass-passivated, standard recovery rectifier optimized for medium-voltage, medium-current switching applications. Its 1500 ns reverse recovery time (trr) and 60 pF junction capacitance at 4 V indicate suitability for moderate-frequency operation-not ultra-fast switching-but sufficient for 50–100 kHz DC-DC stages and snubbers.

Thermally, it features a 13 °C/W junction-to-lead resistance (R_θJL) and 47 °C/W junction-to-ambient resistance (R_θJA), enabling 3 A continuous conduction with appropriate PCB copper area. Its moisture sensitivity level (MSL) is Level 1 per J-STD-020, supporting standard reflow without dry-pack requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - supports input rectification or snubbing in 400–600 V DC bus systems
I_F	3 A continuous - suitable for mid-power converter outputs or auxiliary supplies
I_FSM (8.3 ms)	100 A - withstands inrush and transient surges in automotive and industrial power rails
V_F @ 3 A, 25°C	≤1.15 V - limits conduction loss to ≤3.45 W at full load, easing thermal design
trr	1500 ns - compatible with <100 kHz switching frequencies; not for MHz-range SMPS
T_J max	+150°C - enables operation in under-hood automotive environments
Package	DO-214AB (SMC) - industry-standard surface-mount outline with 7.75 mm × 6.25 mm footprint

Pinout & Package

DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode indicated by band, MSL Level 1, weight ≈0.210 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Current entry point during forward conduction	Connected to lower-potential side (e.g., ground or return path) in rectifier configuration
Cathode (banded end)	Current exit point during forward conduction; reverse-blocking terminal	Connected to higher-potential side (e.g., input rail or switch node); polarity marking critical for PCB layout

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements-enables use in engine control, lighting, and body modules
Glass passivated junction	Enhances long-term reliability and humidity resistance versus epoxy-passivated alternatives
Low forward voltage drop	Reduces power dissipation and thermal rise in 3 A continuous operation
High surge current capability	Withstands 100 A for 8.3 ms-critical for handling load dump or capacitor charging transients
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated production

Applications

Automotive DC-DC Converters	LED Headlamp Power Supplies
Use Scenario: Step-down conversion from 12 V or 48 V battery to regulated 5–24 V for control logic and sensors in ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter stage. Use Value: 800 V V_RRM provides margin against load dump spikes; AEC-Q101 ensures functional safety compliance.	Use Scenario: Constant-current driver for high-brightness LED arrays in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Freewheeling diode in boost or SEPIC LED driver topology. Use Value: 3 A rating supports multi-string LED loads; 1500 ns trr avoids excessive switching loss at ~100 kHz PWM frequency.
Snubber Networks	Industrial AC-DC Front Ends
Use Scenario: RC snubber across MOSFET/IGBT switches in motor drives or power inverters to suppress voltage overshoot. IC Role / Device Role / Timing Role: Clamp diode in RCD snubber circuit absorbing turn-off energy. Use Value: 100 A I_FSM handles brief but high-energy snubber pulses; glass passivation improves long-term stability under repetitive stress.	Use Scenario: Input bridge rectification in 230 V AC-powered industrial HMIs or PLC power supplies. IC Role / Device Role / Timing Role: Single-phase rectifier leg in discrete bridge configuration. Use Value: 800 V V_RRM exceeds 230 V AC × √2 × safety margin (~650 V), ensuring robustness against line surges.

Automotive DC-DC Converters

LED Headlamp Power Supplies

Use Scenario: Step-down conversion from 12 V or 48 V battery to regulated 5–24 V for control logic and sensors in ADAS ECUs.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter stage.

Use Value: 800 V V_RRM provides margin against load dump spikes; AEC-Q101 ensures functional safety compliance.

Use Scenario: Constant-current driver for high-brightness LED arrays in adaptive front lighting systems (AFS).

IC Role / Device Role / Timing Role: Freewheeling diode in boost or SEPIC LED driver topology.

Use Value: 3 A rating supports multi-string LED loads; 1500 ns trr avoids excessive switching loss at ~100 kHz PWM frequency.

Snubber Networks

Industrial AC-DC Front Ends

Use Scenario: RC snubber across MOSFET/IGBT switches in motor drives or power inverters to suppress voltage overshoot.

IC Role / Device Role / Timing Role: Clamp diode in RCD snubber circuit absorbing turn-off energy.

Use Value: 100 A I_FSM handles brief but high-energy snubber pulses; glass passivation improves long-term stability under repetitive stress.

Use Scenario: Input bridge rectification in 230 V AC-powered industrial HMIs or PLC power supplies.

IC Role / Device Role / Timing Role: Single-phase rectifier leg in discrete bridge configuration.

Use Value: 800 V V_RRM exceeds 230 V AC × √2 × safety margin (~650 V), ensuring robustness against line surges.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-3EYH08-M3/45	Same DO-214AB package, 800 V V_RRM, 3 A I_F, but trr = 2000 ns; VF = 1.25 V @ 3 A	Higher V_F and slower recovery increase conduction and switching losses	Acceptable where thermal margin exists and switching frequency ≤50 kHz
ON Semiconductor MUR3080CT	TO-220AC package, dual common-cathode die, 800 V, 3 A per diode, trr = 75 ns (ultrafast)	Radically different form factor and speed-requires board redesign and offers faster switching	Only suitable when ultrafast recovery is mandatory and through-hole mounting is acceptable

Compared with VS-3EYH08-M3/45, the S3KH delivers lower forward loss and faster recovery; versus MUR3080CT, it trades ultrafast speed and dual-diode integration for surface-mount compatibility and automotive qualification-making S3KH optimal for space-constrained, AEC-Q101–required SMC layouts.

Availability

S3KH is available at Aetrix Electronics and suitable for automotive power conversion, LED lighting drivers, snubber networks, and industrial AC-DC front ends requiring stable component supply, AEC-Q101 compliance, and DO-214AB packaging.

Supply support for S3KH 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 S3KH belongs to TSC's S3xH family of AEC-Q101-qualified surface-mount rectifiers, engineered specifically for high-reliability automotive power conversion and industrial snubbing where robustness, thermal performance, and standardized SMC packaging are essential.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S3KH?

The S3KH has a maximum repetitive peak reverse voltage (V_RRM) of 800 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse voltage the device can block continuously without breakdown and is confirmed across all official TSC documentation for the S3KH variant. The S3KH is part of the S3AH–S3MH series, where the letter 'K' explicitly denotes the 800 V rating.

Is the S3KH AEC-Q101 qualified?

Yes, the S3KH is explicitly AEC-Q101 qualified, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet. This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing-making S3KH suitable for automotive powertrain, chassis, and body electronics applications.

What is the forward voltage (V_F) of the S3KH at rated current?

The S3KH exhibits a maximum forward voltage (V_F) of 1.15 V at 3 A forward current and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the worst-case conduction loss relevant for thermal design and efficiency calculations in DC-DC and rectifier applications.

Does the S3KH have a defined reverse recovery time (t_rr)?

Yes, the S3KH has a typical reverse recovery time (t_rr) of 1500 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is documented in the Electrical Specifications section and confirms the device's classification as a standard recovery rectifier-appropriate for switching frequencies up to approximately 100 kHz but not for MHz-range topologies.

What package does the S3KH use, and what are its key mechanical attributes?

The S3KH uses the DO-214AB (SMC) surface-mount package, with dimensions of 7.75 mm × 6.25 mm and a height of 2.45 mm. Key mechanical attributes include matte tin-plated leads (solderable per J-STD-002), polarity indicated by a cathode band, MSL Level 1 per J-STD-020, and UL 94V-0 flammability-rated molding compound-ensuring compatibility with automated assembly and high-reliability environments.

S3KH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 800 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.15 V @ 3 A

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

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 10 µA @ 800 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

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

S3KH FAQ

1.How can I place an order for S3KH through Aetrix?

Please submit a Request for Quotation (RFQ) for S3KH 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 S3KH reliable?

The price and inventory of S3KH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3KH is usually 5 days.

3.What payment methods are accepted for S3KH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3KH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S3KH?

S3KH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S3KH 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 S3KH?

For technical support, including S3KH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3KH requirements.

6.How does Aetrix verify that S3KH is sourced from the original manufacturer or authorized distributors?

All S3KH 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 S3KH meets industry standards.

7.What is the process for return or replacement of S3KH?

All S3KH units undergo pre-shipment inspection (PSI). If there is an issue with S3KH, 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 S3KH part is unused and in its original packaging.

Return procedure for S3KH:

1.Submit a request within 90 days.

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

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