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Taiwan Semiconductor Corporation S1KFS
- Part No.:
- S1KFS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
S1KFS.pdf
- Description:
- DIODE GEN PURP 800V 1A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
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Product details
Overview
S1KFS from Taiwan Semiconductor is a 1A, 800V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 30A surge capability, and 150°C max junction temperature; used in DC-DC converters and switching-mode inverters where high-reliability unidirectional conduction is required.
For engineers reviewing the S1KFS datasheet, S1KFS pinout, S1KFS application, or S1KFS equivalent, key selection criteria include peak reverse voltage (800V), forward voltage at 1A/25°C (≤1.1V), thermal resistance (RθJL = 29°C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.
Technical Context
The S1KFS operates as a single-die, unidirectional power rectifier with cathode-band polarity indication and optimized for automated placement on PCBs. Its glass-passivated junction ensures stable reverse leakage (<1µA @ 25°C, <50µA @ 125°C) and robust surge tolerance (30A IFSM, 8.3ms half-sine).
Thermal performance is characterized with RθJL = 29°C/W and RθJA = 82°C/W on a 5mm × 5mm Cu pad test board. Junction capacitance is 9pF at 1MHz/4V, supporting moderate-frequency switching applications up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse voltage the device blocks without breakdown |
| IF | 1 A - Continuous average forward current rating under specified thermal conditions |
| IFSM | 30 A - Non-repetitive surge current capability (8.3 ms half-sine), critical for inrush handling |
| VF @ 1A, 25°C | ≤1.1 V - Forward voltage drop defining conduction loss and thermal load at rated DC current |
| TJ max | +150 °C - Maximum allowable junction temperature, enabling operation in high-ambient environments |
| RθJL | 29 °C/W - Junction-to-lead thermal resistance, indicating efficient heat transfer to PCB copper |
| CJ | 9 pF - Junction capacitance at 1 MHz / 4 V, influencing high-frequency switching behavior and EMI |
Pinout & Package
Package: SOD-128 - Surface-mount, flat lead, molded plastic case with matte tin-plated terminals; polarity indicated by cathode band; UL 94V-0 rated; weight ≈0.027 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of rectified path; requires adequate trace width for 1A continuous current |
| Cathode | Forward current exit point | Marked by visible band; connects to output rail or filter capacitor; carries full load current and must minimize loop inductance |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and stability of reverse leakage and breakdown voltage under humidity and bias stress |
| MSL Level 1 | Enables unlimited floor life and reflow compatibility without dry-pack or baking requirements |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant manufacturing and end-of-life processing |
| Low RθJL (29°C/W) | Reduces thermal bottleneck between die and PCB, allowing higher power density in compact layouts |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters operating at 50–500 kHz. IC Role / Device Role / Timing Role: Unidirectional power switch converting high-frequency AC to regulated DC output. Use Value: 800V VRRM supports wide input range designs; low VF minimizes conduction loss and improves efficiency at 1A load. | Use Scenario: Output stage rectification in solar microinverters or UPS systems with 200–400 VDC bus. IC Role / Device Role / Timing Role: High-voltage freewheeling and output rectification in H-bridge or half-bridge topologies. Use Value: 30A IFSM withstands transient overloads; MSL 1 enables direct SMT integration without moisture mitigation steps. |
| Industrial Power Supply | AC-DC Adapter |
Use Scenario: Input bridge or auxiliary supply rectification in DIN-rail mounted 24/48 V power supplies. IC Role / Device Role / Timing Role: Line-frequency or PFC-stage rectifier delivering stable DC bus for downstream regulation. Use Value: 150°C TJmax supports operation in enclosed enclosures; UL 94V-0 package enhances fire safety compliance. | Use Scenario: Compact wall-wart or desktop adapter output rectification with space-constrained PCB layout. IC Role / Device Role / Timing Role: Final-stage low-loss rectifier feeding linear or buck post-regulator. Use Value: SOD-128 footprint saves board area vs. DO-214AC; 9pF CJ limits high-frequency noise coupling into sensitive analog circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | VRRM = 800 V, IF = 1 A, VF = 1.15 V @ 1A/25°C, RθJL = 35°C/W, SOD-128 | Slightly higher VF increases conduction loss; lower thermal efficiency than S1KFS | Preferred where STMicroelectronics qualification or existing ST-based BOM simplifies procurement |
| ES1J | VRRM = 600 V, IF = 1 A, VF = 1.7 V @ 1A/25°C, DO-214AA package | Lower voltage rating and higher VF; larger footprint and inferior thermal performance | Acceptable only in 600V-class designs with relaxed efficiency targets and legacy DO-214AA layout |
Compared with STTH1R08 and ES1J, the S1KFS delivers lower forward voltage and superior thermal resistance in the same SOD-128 footprint, enabling higher efficiency and better power density in 800V-rated industrial and converter applications.
Availability
S1KFS 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 manufacturability assurance.
Supply support for S1KFS 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 S1KFS belongs to TSC's S1xFS family of standard rectifiers designed specifically for cost-sensitive, high-volume surface-mount power conversion applications demanding reliability, regulatory compliance, and ease of automated assembly.
FAQ
What is the maximum repetitive peak reverse voltage rating for the S1KFS?
The S1KFS has a maximum repetitive peak reverse voltage (VRRM) of 800 V, verified per Taiwan Semiconductor's C2103 datasheet. This rating defines the highest reverse-biased voltage the S1KFS can block continuously without avalanche breakdown under normal operating conditions and thermal derating curves.
Does the S1KFS meet RoHS and halogen-free requirements?
Yes, the S1KFS is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official Taiwan Semiconductor documentation. These compliance attributes are integral to the S1KFS material composition and manufacturing process, supporting environmental and regulatory requirements for commercial and industrial electronics.
What is the forward voltage drop of the S1KFS at 1A and 25°C?
The S1KFS exhibits a maximum forward voltage (VF) of 1.1 V at 1 A forward current and 25°C junction temperature, with a typical value of 0.99 V. This parameter is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction loss and thermal design in the S1KFS application circuit.
What package type does the S1KFS use, and what are its key mechanical features?
The S1KFS uses the SOD-128 surface-mount package: molded UL 94V-0 compound, matte tin-plated leads compliant with J-STD-002, cathode band polarity marking, and 0.027 g mass. It meets JESD 201 Class 2 whisker resistance and MSL Level 1 per J-STD-020-no bake required before reflow.
Can the S1KFS replace the S1JFS or S1MFS in an existing design?
No-the S1KFS is not a drop-in replacement for S1JFS (600 V) or S1MFS (1000 V), as VRRM is voltage-specific and non-interchangeable without circuit review. Substituting the S1KFS in a design originally using S1JFS risks overvoltage failure; using it where S1MFS is specified may compromise margin in high-transient environments. Always verify voltage stress margins before substituting any S1xFS variant, including the S1KFS.
S1KFS 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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 9pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1KFS FAQ
1.How can I place an order for S1KFS through Aetrix?
Please submit a Request for Quotation (RFQ) for S1KFS 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 S1KFS reliable?
The price and inventory of S1KFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1KFS is usually 5 days.
3.What payment methods are accepted for S1KFS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1KFS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1KFS?
S1KFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1KFS 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 S1KFS?
For technical support, including S1KFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1KFS requirements.
6.How does Aetrix verify that S1KFS is sourced from the original manufacturer or authorized distributors?
All S1KFS 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 S1KFS meets industry standards.
7.What is the process for return or replacement of S1KFS?
All S1KFS units undergo pre-shipment inspection (PSI). If there is an issue with S1KFS, 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 S1KFS part is unused and in its original packaging.
Return procedure for S1KFS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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