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Taiwan Semiconductor Corporation S2K-T
- Part No.:
- S2K-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S2K-T.pdf
- Description:
- 2A, 800V, STANDARD RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
S2K-T from Taiwan Semiconductor is a 2 A, 800 V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 50 A surge rating (8.3 ms); used in DC-DC converters and switching-mode inverters.
For engineers reviewing the S2K-T datasheet, S2K-T pinout, S2K-T application, or S2K-T equivalent, key selection criteria include repetitive peak reverse voltage (800 V), forward voltage (0.95 V max at 2 A, 25°C), thermal resistance (RθJL = 20 °C/W), and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
The S2K-T is a single-die, unidirectional standard recovery rectifier with cathode-band polarity marking. Its glass-passivated junction ensures stable reverse characteristics across -55°C to +150°C junction temperature range and supports automated placement per J-STD-020 Level 1 moisture sensitivity.
Thermal performance is characterized with RθJA = 78 °C/W on a 10 mm × 10 mm copper pad PCB. Electrical behavior includes typical junction capacitance of 11 pF at 1 MHz/4 V and reverse current rising from ≤5 µA (25°C) to ≤300 µA (125°C) at rated VRRM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - maximum repetitive reverse blocking voltage; defines safe operating limit in high-voltage DC bus or flyback snubber circuits |
| IF | 2 A - average forward current rating; determines continuous conduction capability in 20–100 kHz SMPS output stages |
| IFSM (8.3 ms) | 50 A - non-repetitive surge current; enables robustness against line transients and startup inrush in industrial converters |
| VF @ 2 A, 25°C | 0.95 V max - forward drop directly impacts conduction loss and thermal design margin in compact SMB-footprint layouts |
| RθJL | 20 °C/W - junction-to-lead thermal resistance; critical for estimating die temperature rise when soldered to copper pour without heatsink |
| IR @ 800 V, 125°C | ≤300 µA - elevated-temperature leakage current; affects standby power and reliability in high-ambient environments |
| Package | DO-214AA (SMB) - standardized surface-mount outline with 4.5 mm × 3.2 mm footprint and cathode band polarity indicator |
Pinout & Package
DO-214AA (SMB) package with two terminals: anode and cathode. Polarity marked by molded cathode band on body. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return path) |
| Cathode | Forward current exit point / reverse-blocking terminal | Marked by visible band; ties to output rail or filter capacitor positive; withstands up to 800 V reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reverse leakage and humidity resistance without hermetic sealing |
| Junction temperature range | -55°C to +150°C operation supports deployment in automotive under-hood or industrial motor drive enclosures |
| Moisture sensitivity level | Level 1 per J-STD-020 - allows unlimited floor life before reflow, eliminating bake requirements |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives for environmentally constrained end equipment |
| UL 94V-0 molding compound | Self-extinguishing encapsulant meets safety standards for power supply and industrial control housings |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24–48 V input, 5–12 V output flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer to regulated DC output. Use Value: 0.95 V max VF at 2 A minimizes conduction loss; 800 V VRRM accommodates reflected voltage spikes in 48 V bus systems. | Use Scenario: Freewheeling path for inductive loads in 3-phase IGBT-based motor inverters (e.g., HVAC compressors). IC Role / Device Role / Timing Role: Clamping diode providing low-impedance return path during IGBT turn-off to suppress voltage overshoot. Use Value: 50 A IFSM handles transient energy from motor inductance; DO-214AA footprint fits tight gate-driver board spacing. |
| Industrial Power Supply Input Bridge | AC-DC Adapter Bulk Rectification |
Use Scenario: Single-diode element in discrete full-wave bridge configuration for 100–240 VAC input front-end supplies. IC Role / Device Role / Timing Role: Standard recovery rectifier handling 50/60 Hz line frequency with minimal capacitive coupling. Use Value: 800 V VRRM provides 2× safety margin over 400 VDC peak line voltage; 150°C TJMAX supports derated operation in sealed enclosures. | Use Scenario: Primary-side rectification in universal-input (90–264 VAC) wall adapters delivering ≤24 W. IC Role / Device Role / Timing Role: High-efficiency, low-leakage rectifier replacing legacy axial-leaded devices in space-constrained designs. Use Value: ≤5 µA IR at 25°C reduces no-load power consumption; RoHS/halogen-free status meets global regulatory 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 2 A / 800 V rating; faster recovery time (~75 ns vs. ~2 µs), higher VF (1.15 V typ @ 2 A) | Better suited for high-frequency PFC stages; less optimal for low-loss linear-regulated outputs | Select STTH2R08 only if reduced reverse recovery charge is required and higher conduction loss is acceptable |
| ES2D | Lower VRRM (200 V); same DO-214AA package; slightly lower VF (0.92 V max @ 2 A) | Limited to ≤200 V DC bus applications; not suitable for 400 V+ systems | Use ES2D only in low-voltage auxiliary supplies where 800 V rating is unnecessary and cost optimization is primary |
Compared with STTH2R08 and ES2D, the S2K-T delivers optimal balance of 800 V blocking, low forward drop, and thermal robustness for general-purpose 2 A rectification-without trade-offs in recovery speed or voltage margin that compromise system-level reliability.
Availability
S2K-T is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for S2K-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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with ISO/TS 16949 and ISO 14001 certifications.
The S2K-T belongs to TSC's S2x-T family of standard recovery rectifiers designed specifically for cost-sensitive, high-volume industrial and consumer power conversion applications where reliability, manufacturability, and regulatory compliance are essential.
FAQ
What is the maximum junction temperature rating for the S2K-T?
The S2K-T has a maximum junction temperature (TJMAX) of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet. This rating allows reliable operation in enclosed industrial environments and under sustained 2 A forward load with appropriate PCB copper area. Thermal design must account for RθJL = 20 °C/W to ensure the S2K-T stays within this limit.
Does the S2K-T have a specified reverse recovery time?
No, the S2K-T is a standard recovery rectifier and does not specify reverse recovery time (trr) in its datasheet. It is characterized by forward voltage, leakage current, and surge ratings-not fast-switching parameters. For applications requiring controlled trr, consider fast recovery alternatives like STTH2R08, but note the S2K-T remains appropriate for 50/60 Hz and ≤100 kHz switching topologies where soft recovery is acceptable.
Is the S2K-T RoHS and halogen-free compliant?
Yes, the S2K-T is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet. The molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads satisfy J-STD-002 solderability requirements-making the S2K-T suitable for environmentally regulated end equipment.
What is the marking code printed on the S2K-T device body?
The S2K-T is marked with "S2K" on the device body, as confirmed in the "Absolute Maximum Ratings" table under "Marking code on the device." This distinguishes it from other members of the S2x-T family (e.g., S2D-T = S2D, S2M-T = S2M). The marking appears adjacent to the cathode band and is laser-etched or molded into the DO-214AA (SMB) package.
Can the S2K-T replace the S2M-T in a 1000 V design?
No, the S2K-T cannot replace the S2M-T in a 1000 V design because its VRRM is rated at 800 V-not 1000 V. Exceeding the rated reverse voltage risks premature breakdown and catastrophic failure. The S2M-T is the correct choice for 1000 V applications; the S2K-T is strictly limited to systems where peak reverse voltage remains ≤800 V, such as 400 VDC bus with 2× safety margin.
S2K-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- 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:
- 11pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2K-T FAQ
1.How can I place an order for S2K-T through Aetrix?
Please submit a Request for Quotation (RFQ) for S2K-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 S2K-T reliable?
The price and inventory of S2K-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2K-T is usually 5 days.
3.What payment methods are accepted for S2K-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2K-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2K-T?
S2K-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2K-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 S2K-T?
For technical support, including S2K-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2K-T requirements.
6.How does Aetrix verify that S2K-T is sourced from the original manufacturer or authorized distributors?
All S2K-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 S2K-T meets industry standards.
7.What is the process for return or replacement of S2K-T?
All S2K-T units undergo pre-shipment inspection (PSI). If there is an issue with S2K-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 S2K-T part is unused and in its original packaging.
Return procedure for S2K-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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