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

Taiwan Semiconductor Corporation S2KFSH

Name: S2KFSH
Brand: Taiwan Semiconductor Corporation
SKU: S2KFSH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2KFSH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S2KFSH.pdf

Description:: 2A, 800V, STANDARD RECOVERY RECT

Quantity:: RFQ Add To RFQ list

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Inventory:28,000

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Product details

Overview

S2KFSH from Taiwan Semiconductor is a 2 A, 800 V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, AEC-Q101 qualification, and 14 °C/W junction-to-lead thermal resistance-used in automotive freewheeling and DC/DC converter snubber circuits.

For engineers reviewing the S2KFSH datasheet, S2KFSH pinout, S2KFSH application, or S2KFSH equivalent, key selection criteria include peak reverse voltage (800 V), forward voltage at 2 A (0.98 V max @ 25°C), surge current capability (140 A @ 1 ms), thermal resistance (R_θJL = 14 °C/W), and AEC-Q101 qualification for automotive reliability.

Technical Context

The S2KFSH is a single-die, unidirectional standard recovery rectifier optimized for medium-voltage, medium-current switching applications. Its glass-passivated junction ensures stable reverse leakage (<1 µA @ 25°C) and robustness against humidity and mechanical stress.

Designed for surface-mount assembly on PCBs with 5 mm × 5 mm copper pads, it delivers 74 °C/W junction-to-ambient thermal resistance and supports repetitive operation up to 150 °C junction temperature, with polarity indicated by cathode band marking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - Maximum repetitive reverse blocking voltage; defines safe operating range in DC/DC flyback or snubber networks
I_F	2 A continuous - Rated average forward current; determines steady-state power dissipation under conduction
I_FSM (t=1ms)	140 A - Short-duration surge current handling; critical for inductive load turn-off transients
V_F @ 2 A, 25°C	0.98 V max - Forward voltage drop directly impacts conduction loss and thermal design margin
R_θJL	14 °C/W - Junction-to-lead thermal resistance; enables direct heatsinking via PCB copper and simplifies thermal modeling
Junction Temp Range	–55°C to +150°C - Specifies full operational envelope for under-hood automotive environments
C_J @ 1 MHz	12 pF - Junction capacitance affects high-frequency switching noise and EMI behavior in snubber circuits

Pinout & Package

Package: SOD-128 - Low-profile, surface-mount molded case with matte tin-plated leads (J-STD-002 compliant), UL 94V-0 rated molding compound, and cathode band polarity indicator.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of load or switch node; requires adequate copper area for thermal relief
Cathode	Forward current exit / reverse-blocking terminal	Marked by visible band; ties to higher-potential rail or switch drain/source; carries full reverse voltage stress

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST per JESD22-A108
Glass-passivated junction	Eliminates need for conformal coating in humid environments; improves long-term IR stability vs. epoxy-passivated devices
Moisture sensitivity level 1	No bake preconditioning required before reflow; compatible with standard SMT assembly lines without dry-pack handling
Low profile SOD-128 package	Height ≤1.1 mm enables use in space-constrained modules such as engine control units and ADAS power stages
Halogen-free construction	Complies with IEC 61249-2-21; supports RoHS-compliant manufacturing and end-of-life recycling requirements

Applications

Automotive Freewheeling Diode	DC/DC Converter Snubber
Use Scenario: Suppresses inductive kickback in 12 V/48 V automotive solenoid drivers and fuel injector circuits. IC Role / Device Role / Timing Role: Unidirectional freewheeling path during MOSFET/IGBT turn-off; clamps voltage spike below 800 V rating. Use Value: Prevents switch destruction using low V_F (0.98 V max) and fast thermal response (R_θJL = 14 °C/W).	Use Scenario: Absorbs energy from transformer leakage in isolated buck-boost converters for body electronics. IC Role / Device Role / Timing Role: Passive snubber element across primary-side switch; dissipates transient energy during switching transitions. Use Value: Stable 12 pF junction capacitance and <1 µA reverse leakage ensure predictable RC time constant and minimal standby loss.
Engine Control Unit Power Supply	Onboard Charger Auxiliary Rectification
Use Scenario: Input rectification stage in 5 V/3.3 V auxiliary supplies within engine control modules. IC Role / Device Role / Timing Role: AC-to-DC conversion feeding LDOs or DC/DC controllers; operates continuously at ambient up to 125°C. Use Value: –55°C to +150°C junction range and AEC-Q101 qualification guarantee functional safety over full vehicle lifetime.	Use Scenario: Secondary-side output rectification in 6.6 kW OBC auxiliary power supplies. IC Role / Device Role / Timing Role: Medium-voltage rectifier in low-isolation auxiliary rails (e.g., 15 V bias supply for gate drivers). Use Value: 800 V V_RRM provides margin against reflected transients; 140 A I_FSM handles startup surges without derating.

Automotive Freewheeling Diode

DC/DC Converter Snubber

Use Scenario: Suppresses inductive kickback in 12 V/48 V automotive solenoid drivers and fuel injector circuits.

IC Role / Device Role / Timing Role: Unidirectional freewheeling path during MOSFET/IGBT turn-off; clamps voltage spike below 800 V rating.

Use Value: Prevents switch destruction using low V_F (0.98 V max) and fast thermal response (R_θJL = 14 °C/W).

Use Scenario: Absorbs energy from transformer leakage in isolated buck-boost converters for body electronics.

IC Role / Device Role / Timing Role: Passive snubber element across primary-side switch; dissipates transient energy during switching transitions.

Use Value: Stable 12 pF junction capacitance and <1 µA reverse leakage ensure predictable RC time constant and minimal standby loss.

Engine Control Unit Power Supply

Onboard Charger Auxiliary Rectification

Use Scenario: Input rectification stage in 5 V/3.3 V auxiliary supplies within engine control modules.

IC Role / Device Role / Timing Role: AC-to-DC conversion feeding LDOs or DC/DC controllers; operates continuously at ambient up to 125°C.

Use Value: –55°C to +150°C junction range and AEC-Q101 qualification guarantee functional safety over full vehicle lifetime.

Use Scenario: Secondary-side output rectification in 6.6 kW OBC auxiliary power supplies.

IC Role / Device Role / Timing Role: Medium-voltage rectifier in low-isolation auxiliary rails (e.g., 15 V bias supply for gate drivers).

Use Value: 800 V V_RRM provides margin against reflected transients; 140 A I_FSM handles startup surges without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R08	V_RRM = 800 V, I_F = 2 A, but R_θJL = 18 °C/W and not AEC-Q101 qualified	Lacks automotive qualification; suitable only for industrial/commercial power supplies	Choose STTH2R08 if AEC-Q101 is not required and thermal margin allows higher R_θJL
VS-2EYH08-M3	V_RRM = 800 V, I_F = 2 A, VF = 0.95 V typ @ 2 A, but SOD-123FL package (smaller footprint, higher R_θJA)	Lower profile but reduced thermal performance; limited to lower ambient or pulsed-duty use	Select VS-2EYH08-M3 only when board space is constrained and thermal load is <1.2 W

Compared with STTH2R08 and VS-2EYH08-M3, the S2KFSH uniquely combines AEC-Q101 compliance, SOD-128 thermal efficiency (R_θJL = 14 °C/W), and standardized tape-and-reel packaging-making it the preferred choice for automotive power stages requiring long-term reliability and manufacturability.

Availability

S2KFSH is available at Aetrix Electronics and suitable for automotive freewheeling, DC/DC converter snubbers, and engine control unit power supplies requiring stable component supply across production lifecycles.

Supply support for S2KFSH 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 automotive, industrial, and consumer markets since 1979.

The S2KFSH belongs to TSC's AEC-Q101-qualified S2xFSH standard rectifier family, engineered specifically for high-reliability automotive power conversion where thermal robustness, moisture resistance, and consistent surge handling are mandatory.

FAQ

What is the maximum junction temperature rating for the S2KFSH?

The S2KFSH has a maximum junction temperature (T_J) rating of +150°C, with a minimum of –55°C. This wide operating range supports deployment in under-hood automotive environments and industrial power supplies where ambient temperatures exceed 105°C. The device maintains specified electrical performance-including reverse leakage and forward voltage-across this full range, and its thermal resistance values (R_θJL = 14 °C/W) are measured under defined PCB mounting conditions.

Is the S2KFSH pin-compatible with other SOD-128 rectifiers like S2DFS H or S2MFSH?

Yes-the S2KFSH shares identical SOD-128 package dimensions, pinout (anode/cathode), and mounting footprint with all members of the S2xFSH series (S2DFSH through S2MFSH). The only differences are rated V_RRM (800 V for S2KFSH vs. 200–1000 V for others) and corresponding marking code (S2KFH). No PCB layout change is needed when substituting within the same package variant.

Does the S2KFSH require special handling for moisture sensitivity?

No-the S2KFSH is rated at Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without baking or dry-pack handling. This eliminates process overhead in high-volume SMT lines and reduces risk of popcorning or delamination during soldering-unlike MSL 3 or higher discrete diodes that demand strict floor-life controls.

What is the forward voltage of the S2KFSH at 2 A and 125°C?

The forward voltage (V_F) of the S2KFSH is specified as 0.88 V (typical) and 0.98 V (maximum) at I_F = 2 A and T_J = 125°C. This elevated-temperature V_F value is critical for thermal design validation, as it reflects real-world conduction loss under worst-case operating conditions-enabling accurate power dissipation and heatsink sizing in automotive modules.

How does the AEC-Q101 qualification impact the use of S2KFSH in automotive designs?

The AEC-Q101 qualification confirms that the S2KFSH has passed rigorous stress tests-including HTGB, HTRB, temperature cycling, and ESD-required for discrete semiconductors in automotive applications. This certification assures system designers that the S2KFSH meets zero-defect reliability targets for engine control, transmission, and ADAS subsystems, eliminating the need for additional qualification testing and accelerating time-to-production for Tier 1 suppliers.

S2KFSH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 2 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 600 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

S2KFSH FAQ

1.How can I place an order for S2KFSH through Aetrix?

Please submit a Request for Quotation (RFQ) for S2KFSH 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 S2KFSH reliable?

The price and inventory of S2KFSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KFSH is usually 5 days.

3.What payment methods are accepted for S2KFSH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KFSH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2KFSH?

S2KFSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2KFSH 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 S2KFSH?

For technical support, including S2KFSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KFSH requirements.

6.How does Aetrix verify that S2KFSH is sourced from the original manufacturer or authorized distributors?

All S2KFSH 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 S2KFSH meets industry standards.

7.What is the process for return or replacement of S2KFSH?

All S2KFSH units undergo pre-shipment inspection (PSI). If there is an issue with S2KFSH, 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 S2KFSH part is unused and in its original packaging.

Return procedure for S2KFSH:

1.Submit a request within 90 days.

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

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