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Taiwan Semiconductor Corporation S2KA-T
- Part No.:
- S2KA-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
S2KA-T.pdf
- Description:
- 2A, 800V, STANDARD RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:9,638
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Product details
Overview
S2KA-T from Taiwan Semiconductor is a 2A, 800V standard surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 50A surge capability (8.3 ms). It serves as the primary AC-to-DC conversion element in compact switching power supplies.
For engineers reviewing the S2KA-T datasheet, S2KA-T pinout, S2KA-T application, or S2KA-T equivalent, key selection criteria include its 800V repetitive peak reverse voltage, 0.96V forward voltage at 2A/25°C, thermal resistance (RθJA = 86°C/W), and RoHS/halogen-free compliance for industrial-grade power conversion designs.
Technical Context
The S2KA-T is a single-die, unidirectional standard recovery rectifier optimized for general-purpose and switching-mode power applications. Its glass-passivated junction ensures stable reverse characteristics across -55°C to +150°C operating range and supports automated placement per J-STD-020 Level 1 moisture sensitivity.
Thermal performance is characterized with RθJL = 14°C/W and RθJC = 23°C/W on a 5mm × 5mm Cu pad PCB, enabling reliable 2A continuous conduction without forced cooling in space-constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse blocking voltage; defines safe AC input voltage headroom in bridge or flyback configurations |
| IF | 2 A - Continuous average forward current rating at TA = 75°C; determines minimum heatsinking requirement |
| IFSM (8.3 ms) | 50 A - Non-repetitive surge current handling; supports inrush current tolerance during cold-start of SMPS | VF @ 2A, 25°C | 0.96 V max - Forward voltage drop directly impacts conduction loss and thermal rise in high-efficiency converters |
| IR @ VR, 25°C | 5 µA max - Low leakage enables stable DC bus hold-up and reduces standby power loss |
| TJ max | +150°C - Maximum junction temperature allows operation in sealed enclosures or high-ambient environments |
| CJ @ 4V, 1MHz | 30 pF typical - Junction capacitance affects high-frequency switching noise and EMI filter design |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead 1) | Forward current entry point | Connected to AC input or transformer secondary; polarity-sensitive for correct rectification direction |
| Cathode (lead 2) | Forward current exit / DC output node | Routes rectified current to bulk capacitor; marked by cathode band for orientation verification during placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of reverse leakage and breakdown voltage under thermal cycling and humidity stress |
| Moisture sensitivity level 1 | Enables direct use in reflow assembly without baking; eliminates pre-conditioning delays in high-volume manufacturing |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and prevents whisker growth per JESD 201 Class 1 |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for safety-critical power supplies in industrial and consumer end equipment |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and global environmental directives for export-ready BOMs |
Applications
| DC–DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12V–48V output DC–DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Standard recovery rectifier converting high-frequency transformer output to regulated DC bus. Use Value: 0.96V VF minimizes conduction loss at 2A load; 800V VRRM accommodates reflected voltage spikes in flyback topologies. | Use Scenario: Output stage rectification in 3-phase motor drive inverters with regenerative braking. IC Role / Device Role / Timing Role: Freewheeling diode providing path for inductive kickback current during PWM dead-time. Use Value: 50A IFSM withstands transient overcurrents; 150°C TJmax supports operation near heatsink-limited IGBT modules. |
| General-Purpose Power Supply | Industrial AC Adapter |
Use Scenario: Input rectification in universal-input (85–265VAC) offline SMPS for industrial controls. IC Role / Device Role / Timing Role: Bridge leg component delivering full-wave rectified DC to PFC front-end or bulk capacitor. Use Value: 800V VRRM provides 2× safety margin over 265VAC peak (375V); DO-214AC footprint enables compact board layout. | Use Scenario: Compact wall-mounted AC adapters rated up to 24W for IoT gateways and sensors. IC Role / Device Role / Timing Role: Primary-side rectifier in non-isolated buck-derived topologies with integrated controller. Use Value: 2A IF sustains continuous load; halogen-free/ROHS compliance meets regional regulatory shipping requirements. |
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 2A/800V rating; VF = 0.95V typ @ 2A but higher IR (10 µA max @ 25°C) | Higher leakage may impact standby efficiency in energy-sensitive designs | Prefer S2KA-T where low IR is critical; STTH2R08 offers wider availability in European distribution |
| ES2J | Identical DO-214AC package and 2A/600V rating; lower VRRM limits use to ≤265VAC inputs | Not suitable for 305VAC or 400V DC-link applications requiring 800V margin | Select ES2J only for cost-sensitive 600V-class designs; S2KA-T required for 800V system robustness |
Compared with STTH2R08 and ES2J, the S2KA-T delivers superior reverse leakage control and higher voltage margin-critical for reliability in universal-input power supplies-while maintaining identical mounting compatibility and thermal performance on standard PCB pads.
Availability
S2KA-T is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial AC adapters requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for S2KA-T 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 power, automotive, and industrial markets since 1979.
The S2KA-T belongs to TSC's S2x series of standard rectifiers, engineered specifically for cost-effective, high-yield surface-mount power conversion in consumer, industrial, and telecom power supplies.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the S2KA-T?
The S2KA-T has a VRRM of 800 V, verified per Taiwan Semiconductor's D2111 datasheet. This rating defines the highest continuous reverse voltage the device can block without breakdown. It is critical for selecting appropriate input voltage derating margins in offline power supplies-e.g., supporting 265VAC mains with >2× safety margin. The S2KA-T's 800V rating distinguishes it from lower-voltage variants like S2JA-T (600V) and S2MA-T (1000V).
Does the S2KA-T meet RoHS and halogen-free requirements?
Yes, the S2KA-T is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official Taiwan Semiconductor datasheet (Version D2111). This certification applies to the entire S2x-T series, including the S2KA-T. The device uses matte tin-plated leads and UL 94V-0 molding compound, making it suitable for export to EU, Japan, and other regulated markets without material declaration exceptions.
What is the forward voltage (VF) of the S2KA-T at 2A and 25°C?
The S2KA-T exhibits a maximum forward voltage of 1.10 V at 2A and 25°C, with a typical value of 0.96 V under the same conditions (pulse test, PW = 0.3 ms). This VF directly determines conduction losses in power stages-e.g., ~2.2 W loss at 2A full load. At 125°C junction temperature, VF drops to 0.97 V max, improving thermal stability in high-ambient designs.
Is the S2KA-T suitable for automated SMT assembly?
Yes, the S2KA-T is explicitly designed for automated placement, as stated in its features list. Its DO-214AC (SMA) package, J-STD-020 Level 1 moisture sensitivity, and matte tin-plated leads ensure compatibility with standard reflow profiles and eliminate pre-baking requirements. The cathode band marking also supports optical recognition in pick-and-place systems-key for high-yield manufacturing of the S2KA-T in power supply modules.
What is the surge current rating (IFSM) of the S2KA-T, and how is it tested?
The S2KA-T has a non-repetitive surge current rating of 50 A for t = 8.3 ms (half-sine wave), per its absolute maximum ratings table. This rating reflects capability to survive inrush currents during cold-start of switched-mode power supplies. A second rating of 124 A applies for t = 1.0 ms, useful for evaluating short-duration transients. Both values are validated under specified pulse conditions and assume proper PCB thermal management per the datasheet's 5 mm × 5 mm copper pad reference.
S2KA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- 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:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 30pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KA-T FAQ
1.How can I place an order for S2KA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KA-T 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 S2KA-T reliable?
The price and inventory of S2KA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KA-T is usually 5 days.
3.What payment methods are accepted for S2KA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KA-T?
S2KA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KA-T 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 S2KA-T?
For technical support, including S2KA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KA-T requirements.
6.How does Aetrix verify that S2KA-T is sourced from the original manufacturer or authorized distributors?
All S2KA-T 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 S2KA-T meets industry standards.
7.What is the process for return or replacement of S2KA-T?
All S2KA-T units undergo pre-shipment inspection (PSI). If there is an issue with S2KA-T, 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 S2KA-T part is unused and in its original packaging.
Return procedure for S2KA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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