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

Taiwan Semiconductor Corporation S2KAL

Name: S2KAL
Brand: Taiwan Semiconductor Corporation
SKU: S2KAL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2KAL

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: S2KAL.pdf

Description:: DIODE GEN PURP 800V 2A THIN SMA

Quantity:: RFQ Add To RFQ list

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Inventory:7,000

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Product details

Overview

S2KAL from Taiwan Semiconductor is a 2 A, 800 V repetitive peak reverse voltage standard surface-mount silicon rectifier diode in a Thin SMA package, featuring glass-passivated junction, 50 A surge rating, and 150 °C maximum junction temperature-used in DC-DC converters and switching-mode inverters.

For engineers reviewing the S2KAL datasheet, S2KAL pinout, S2KAL application, or S2KAL equivalent, key selection criteria include its 800 V V_RRM, 0.98 V forward voltage at 2 A/25 °C, 14 °C/W junction-to-lead thermal resistance, moisture sensitivity level 1 compliance, and cathode-band polarity marking for reliable board-level assembly and thermal management.

Technical Context

The S2KAL operates as a single-die, unidirectional standard recovery rectifier with a 2 A average forward current rating and 50 A non-repetitive surge capability (t = 8.3 ms). Its glass-passivated junction ensures stable reverse leakage (<1 µA at 25 °C, <33 µA at 125 °C) and robustness against humidity and mechanical stress.

Thermal performance is defined for PCB mounting on a 5 mm × 5 mm copper pad: R_θJL = 14 °C/W enables efficient heat transfer to the PCB lead frame, while R_θJA = 74 °C/W reflects ambient-limited dissipation in still air-critical for compact power supply layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - Maximum repetitive reverse blocking voltage; defines usable input voltage range in offline or high-voltage DC-DC stages
I_F	2 A - Continuous average forward current; sets minimum trace width and heatsinking requirements at full load
I_FSM (8.3 ms)	50 A - Non-repetitive surge rating; supports inrush current handling during startup without failure
V_F @ 2 A, 25 °C	0.98 V max - Forward conduction loss directly impacts efficiency and thermal rise in rectification path
T_J max	+150 °C - Maximum junction temperature; allows operation in high-ambient industrial environments with derating
R_θJL	14 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when soldered to PCB copper
C_J	12 pF @ 1 MHz, 4 V - Junction capacitance affects high-frequency switching noise and EMI filter design

Pinout & Package

Package: Thin SMA (Surface Mount Axial), low-profile, RoHS-compliant, matte tin-plated leads, J-STD-002 solderable, polarity indicated by cathode band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of AC source or transformer secondary; requires adequate copper area for current and thermal handling
Cathode	Forward current exit / reverse-blocking terminal	Marked by visible band; ties to positive output rail; reverse voltage applied here must stay ≤800 V

Key Features

Feature	Design Value
Glass-passivated junction	Ensures long-term reliability under humid conditions and prevents junction corrosion during reflow or operation
Moisture sensitivity level 1	Eliminates bake requirement before SMT assembly-reduces process cost and avoids thermal stress on components
Thin SMA package	0.029 g weight and low profile enable use in space-constrained power modules and ultra-thin adapters
UL 94V-0 molding compound	Meets flammability safety standards for end equipment requiring regulatory certification (e.g., ITE, industrial)
JESD 201 Class 2 whisker resistance	Prevents tin whisker growth under thermal cycling-critical for automotive and telecom infrastructure applications

Applications

AC-DC Adapter Rectification	Industrial DC-DC Converter Input Stage
Use Scenario: Converts 100–240 VAC mains to high-voltage DC bus in compact wall adapters and USB-PD power supplies. IC Role / Device Role / Timing Role: Standard recovery rectifier providing unidirectional conduction and 800 V reverse blocking. Use Value: Low 0.98 V forward drop minimizes conduction loss at 2 A, while glass passivation ensures field reliability across global voltage ranges.	Use Scenario: Rectifies high-frequency transformer output in isolated 48 V–12 V industrial DC-DC converters. IC Role / Device Role / Timing Role: Single-die rectifier handling continuous 2 A load and transient surges up to 50 A. Use Value: 14 °C/W R_θJL allows direct thermal coupling to PCB ground plane, reducing need for external heatsinks.
Switching Inverter Freewheeling Path	General-Purpose High-Voltage Clamping
Use Scenario: Provides freewheeling path for inductive loads in motor drive inverters operating up to 800 V DC bus. IC Role / Device Role / Timing Role: Standard recovery diode conducting during MOSFET off-time to recirculate inductive energy. Use Value: 150 °C T_Jmax supports sustained operation in thermally demanding motor control enclosures.	Use Scenario: Suppresses voltage spikes across relay coils, solenoids, or transformer windings in factory automation systems. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback with 800 V standoff and fast turn-on. Use Value: Cathode-band polarity marking ensures correct orientation during automated placement, preventing functional failure.

AC-DC Adapter Rectification

Industrial DC-DC Converter Input Stage

Use Scenario: Converts 100–240 VAC mains to high-voltage DC bus in compact wall adapters and USB-PD power supplies.

IC Role / Device Role / Timing Role: Standard recovery rectifier providing unidirectional conduction and 800 V reverse blocking.

Use Value: Low 0.98 V forward drop minimizes conduction loss at 2 A, while glass passivation ensures field reliability across global voltage ranges.

Use Scenario: Rectifies high-frequency transformer output in isolated 48 V–12 V industrial DC-DC converters.

IC Role / Device Role / Timing Role: Single-die rectifier handling continuous 2 A load and transient surges up to 50 A.

Use Value: 14 °C/W R_θJL allows direct thermal coupling to PCB ground plane, reducing need for external heatsinks.

Switching Inverter Freewheeling Path

General-Purpose High-Voltage Clamping

Use Scenario: Provides freewheeling path for inductive loads in motor drive inverters operating up to 800 V DC bus.

IC Role / Device Role / Timing Role: Standard recovery diode conducting during MOSFET off-time to recirculate inductive energy.

Use Value: 150 °C T_Jmax supports sustained operation in thermally demanding motor control enclosures.

Use Scenario: Suppresses voltage spikes across relay coils, solenoids, or transformer windings in factory automation systems.

IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback with 800 V standoff and fast turn-on.

Use Value: Cathode-band polarity marking ensures correct orientation during automated placement, preventing functional failure.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R08	Same I_F (2 A), same V_RRM (800 V), but TO-220AC package (larger footprint, higher R_θJA)	Requires through-hole mounting and larger heatsink area; unsuitable for ultra-thin SMT designs	Select when higher surge margin (I_FSM = 75 A) and legacy through-hole compatibility are prioritized over size
SB280	Lower V_RRM (80 V), Schottky construction (V_F ≈ 0.85 V), no reverse recovery time	Not suitable for 800 V applications; limited to low-voltage DC-DC outputs	Choose only for sub-100 V circuits where ultra-low forward drop and zero Q_rr outweigh voltage rating needs

Compared with STTH2R08 and SB280, the S2KAL uniquely balances 800 V blocking, SMT-compatible Thin SMA packaging, and industry-standard reliability features-including moisture level 1, UL 94V-0, and JESD 201 Class 2-making it optimal for space-constrained, certified industrial power supplies.

Availability

S2KAL is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose high-voltage rectification requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for S2KAL 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 S2KAL belongs to TSC's S2DAL–S2MAL standard rectifier family, engineered specifically for high-reliability, cost-optimized AC-DC and DC-DC power conversion in space-constrained SMT applications.

FAQ

What is the maximum repetitive peak reverse voltage rating for the S2KAL?

The S2KAL has a maximum repetitive peak reverse voltage (V_RRM) of 800 V, as specified in the Absolute Maximum Ratings table. This rating defines the highest continuous reverse voltage the device can block without breakdown under normal operating conditions and is validated per JEDEC test methods. The S2KAL must not be subjected to reverse voltages exceeding 800 V in any circuit configuration.

Does the S2KAL have a specified forward voltage at elevated temperature?

Yes-the S2KAL specifies forward voltage (V_F) at both 25 °C and 125 °C. At 2 A and 125 °C, V_F is 0.88 V typical and 0.98 V maximum. This data confirms reduced conduction loss at high junction temperatures, supporting stable operation in thermally stressed environments such as enclosed power supplies or industrial enclosures.

Is the S2KAL suitable for automated SMT assembly without pre-baking?

Yes-the S2KAL carries moisture sensitivity level (MSL) 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH and placed directly into reflow without baking. This eliminates process steps, reduces risk of popcorning, and supports high-yield automated assembly lines handling high-mix, low-volume production.

What is the thermal resistance from junction to ambient for the S2KAL?

The S2KAL has a junction-to-ambient thermal resistance (R_θJA) of 74 °C/W when mounted on a standard 5 mm × 5 mm copper pad test board. This value applies under still-air conditions and serves as a baseline for thermal simulation; actual R_θJA improves with larger copper areas, internal layers, or forced airflow.

How is polarity identified on the S2KAL package?

Polarity on the S2KAL is indicated by a visible cathode band printed on the body of the Thin SMA package. The banded end corresponds to the cathode terminal, and the opposite end is the anode. This marking is consistent with IPC-7351 standards and verified during optical inspection in automated placement systems.

S2KAL 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):: 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 @ 800 V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Thin SMA

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

S2KAL FAQ

1.How can I place an order for S2KAL through Aetrix?

Please submit a Request for Quotation (RFQ) for S2KAL 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 S2KAL reliable?

The price and inventory of S2KAL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KAL is usually 5 days.

3.What payment methods are accepted for S2KAL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KAL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2KAL?

S2KAL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2KAL 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 S2KAL?

For technical support, including S2KAL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KAL requirements.

6.How does Aetrix verify that S2KAL is sourced from the original manufacturer or authorized distributors?

All S2KAL 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 S2KAL meets industry standards.

7.What is the process for return or replacement of S2KAL?

All S2KAL units undergo pre-shipment inspection (PSI). If there is an issue with S2KAL, 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 S2KAL part is unused and in its original packaging.

Return procedure for S2KAL:

1.Submit a request within 90 days.

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

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