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Taiwan Semiconductor Corporation S3KB
- Part No.:
- S3KB
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S3KB.pdf
- Description:
- DIODE GEN PURP 800V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
S3KB from Taiwan Semiconductor is a 3A, 800V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 1.15V max forward voltage at 3A/25°C, 80A surge capability, and 150°C max junction temperature - used in AC/DC front-end rectification for industrial SMPS and lighting ballasts.
For engineers reviewing the S3KB datasheet, S3KB pinout, S3KB application, or S3KB equivalent, key selection criteria include repetitive peak reverse voltage (800V), forward current rating (3A), thermal resistance (10°C/W), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance for high-reliability power conversion designs.
Technical Context
The S3KB operates as a single-die, unidirectional standard recovery rectifier with 1500ns reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions. Its glass-passivated junction ensures stable leakage performance across temperature, with IR ≤ 10µA at 25°C and ≤ 250µA at 125°C at rated VRRM.
Thermally, the device delivers 10°C/W junction-to-lead resistance and supports continuous operation up to 150°C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in its molded DO-214AA (SMB) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - maximum repetitive reverse blocking voltage; defines safe AC input voltage derating margin in bridge or single-phase rectifier topologies |
| IF | 3 A - average forward current rating at TA = 75°C; determines continuous conduction capability in 50/60Hz or high-frequency SMPS inputs |
| IFSM | 80 A - non-repetitive surge current (8.3ms half-sine); enables robustness against line transients and inrush in offline power supplies |
| VF | ≤1.15 V @ 3A, 25°C - forward voltage drop directly impacts conduction loss and thermal design of heat sinking requirements |
| trr | 1500 ns - reverse recovery time; influences switching loss and EMI in higher-frequency converters using this standard recovery diode |
| RθJL | 10 °C/W - junction-to-lead thermal resistance; enables direct thermal coupling to PCB copper for passive cooling without heatsink |
| MSL | Level 1 (per J-STD-020) - allows unlimited floor life and standard reflow without baking; simplifies SMT assembly logistics |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration. Cathode indicated by band on body. Matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | AC or positive-side input connection | Accepts incoming alternating or pulsating DC; polarity-sensitive node requiring correct orientation in PCB layout |
| Cathode (Lead 2) | DC output / load return path | Delivers rectified unidirectional current to filter capacitor or downstream converter stage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable IR drift over temperature and humidity; eliminates need for conformal coating in humid environments |
| Low VF (≤1.15 V) | Reduces conduction loss by ~15% vs. comparable 3A 800V rectifiers; lowers thermal stress on adjacent MOSFETs or controllers |
| 80A IFSM rating | Supports >25× rated current surge; accommodates cold-start inrush in LED drivers and adapter designs without derating |
| DO-214AA (SMB) footprint | Standardized 4.5 × 3.5 mm outline compatible with automated pick-and-place; enables high-volume manufacturing scalability |
| RoHS + halogen-free | Meets IEC 61249-2-21 and EU RoHS directives; qualifies for export to regulated markets including EU, Japan, and South Korea |
Applications
| LED Driver Power Supply | Industrial AC/DC Adapter |
|---|---|
Use Scenario: Input rectification stage in constant-current LED drivers for street lighting and commercial fixtures. IC Role / Device Role / Timing Role: Standard recovery rectifier converting 100–277V AC mains to pulsating DC prior to bulk capacitor filtering. Use Value: 800V VRRM provides 2× safety margin over 277VAC line peaks; 3A IF sustains continuous operation at full load with <1.15V conduction loss. | Use Scenario: Primary-side rectification in universal-input (90–264VAC) industrial adapters powering PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional current steering element in full-wave bridge or single-diode configuration. Use Value: 80A IFSM withstands repeated cold-start surges; MSL Level 1 enables direct reflow without pre-bake, reducing production cost. |
| Switching Mode Power Supply | Electronic Ballast for Fluorescent Lamps |
Use Scenario: Output rectification in 30–60W flyback or forward converters for telecom and instrumentation equipment. IC Role / Device Role / Timing Role: Secondary-side standard recovery diode delivering isolated DC output after transformer winding. Use Value: 10°C/W RθJL allows direct PCB copper thermal path; 150°C TJ rating supports operation in enclosed enclosures up to 70°C ambient. | Use Scenario: Rectification in high-frequency electronic ballasts driving T5/T8 lamps at 20–60kHz. IC Role / Device Role / Timing Role: Input-stage diode in voltage-doubler or bridge configuration feeding resonant tank circuit. Use Value: 1500ns trr is acceptable for 20–60kHz operation; glass passivation prevents parameter shift during long-life lamp operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3R08 | Same 3A/800V rating; trr = 125ns (ultrafast), VF = 1.7V typical - higher conduction loss but lower switching loss | Better suited for high-frequency PFC or ZVS circuits where fast recovery reduces EMI | Select STTH3R08 only if trr < 200ns is required; S3KB remains optimal for cost-sensitive, thermally constrained 50/60Hz–100kHz designs |
| GBU8K | Bridge configuration (4-pin GBU), 8A total, 800V - not single-diode; larger TO-220 package, higher thermal mass | Used in full-wave bridge layouts; requires different footprint and mounting; no cathode band orientation check needed | Choose GBU8K only when full-wave bridge integration is preferred; S3KB offers smaller SMB footprint and lower assembly cost for single-diode use cases |
Compared with STTH3R08 and GBU8K, the S3KB provides the optimal balance of low VF, industry-standard SMB packaging, and cost efficiency for discrete rectification in 50/60Hz–100kHz power supplies where ultrafast recovery is unnecessary.
Availability
S3KB is available at Aetrix Electronics and suitable for switching mode power supplies, LED drivers, and industrial AC/DC adapters requiring stable component supply, J-STD-020 Level 1 moisture handling, and RoHS-compliant sourcing.
Supply support for S3KB 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 S3KB belongs to TSC's S3x series of standard recovery rectifiers designed specifically for cost-effective, high-yield AC/DC front-end rectification in consumer, lighting, and industrial power supplies.
FAQ
What is the maximum junction temperature rating for the S3KB?
The S3KB has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows reliable operation in enclosed power supplies with ambient temperatures up to 70°C when mounted on ≥1 cm² of 2-oz copper. The S3KB must be operated within this limit to maintain specified VF, IR, and trr performance throughout its lifetime.
Does the S3KB have a halogen-free construction?
Yes, the S3KB uses halogen-free molding compound compliant with IEC 61249-2-21, confirmed in the official Taiwan Semiconductor product specification document Version M2102. This applies to both the encapsulant and lead finish, making the S3KB suitable for environmentally regulated markets including the EU and Japan.
What is the reverse recovery time (trr) of the S3KB and under what test conditions?
The S3KB has a reverse recovery time (trr) of 1500 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A per the electrical specifications table. This value is typical and applies at TA = 25°C; trr increases with junction temperature and is appropriate for line-frequency and sub-100kHz switching applications.
Is the S3KB pin-compatible with other devices in the S3AB–S3MB family?
Yes, all S3AB–S3MB devices share identical DO-214AA (SMB) package dimensions, pinout, and thermal characteristics. The S3KB differs only in VRRM (800V) and marking code; it can replace S3JB (600V) or S3MB (1000V) in the same footprint when voltage margin requirements align with the design.
What is the moisture sensitivity level (MSL) of the S3KB and how does it affect assembly?
The S3KB is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be subjected to standard reflow profiles without preconditioning or baking. This simplifies SMT line integration and eliminates moisture-related popcorning risk during assembly of the S3KB into high-volume power supply PCBs.
S3KB 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):
- 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:
- 40pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S3KB FAQ
1.How can I place an order for S3KB through Aetrix?
Please submit a Request for Quotation (RFQ) for S3KB 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 S3KB reliable?
The price and inventory of S3KB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3KB is usually 5 days.
3.What payment methods are accepted for S3KB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3KB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S3KB?
S3KB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S3KB 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 S3KB?
For technical support, including S3KB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3KB requirements.
6.How does Aetrix verify that S3KB is sourced from the original manufacturer or authorized distributors?
All S3KB 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 S3KB meets industry standards.
7.What is the process for return or replacement of S3KB?
All S3KB units undergo pre-shipment inspection (PSI). If there is an issue with S3KB, 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 S3KB part is unused and in its original packaging.
Return procedure for S3KB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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