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Taiwan Semiconductor Corporation RS1KFL
- Part No.:
- RS1KFL
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
RS1KFL.pdf
- Description:
- 250NS, 1A, 800V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:9,658
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Product details
Overview
RS1KFL from Taiwan Semiconductor is a 1 A, 800 V fast recovery surface-mount rectifier in SOD-123FL package, featuring 250 ns reverse recovery time, 1.04 V forward voltage at 1.0 A/25°C, and 150 µA reverse leakage at 125°C - deployed in high-frequency switching mode power supplies for efficient AC/DC and DC/DC conversion.
For engineers reviewing the RS1KFL datasheet, RS1KFL pinout, RS1KFL application, or RS1KFL equivalent, key selection criteria include peak reverse voltage rating (800 V), thermal resistance (RθJA = 84 °C/W), junction capacitance (11 pF), and compatibility with automated SMT placement on standard PCB footprints.
Technical Context
The RS1KFL is a single-die, glass-passivated silicon PN junction rectifier optimized for fast recovery in high-frequency switching topologies. Its 800 V VRRM, 30 A IFSM, and 150 °C maximum junction temperature support robust operation in compact power converters.
Thermal performance is characterized with RθJL = 17 °C/W and RθJC = 19 °C/W on a 5 mm × 5 mm copper pad, enabling reliable power dissipation without heatsinking in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports input rectification in 380 VAC line-fed SMPS and 400 VDC bus applications |
| IF | 1 A continuous - suitable for low-to-medium power output stages up to ~15 W at high efficiency |
| trr | 250 ns - minimizes switching losses and EMI in 100–500 kHz converters |
| VF @ 1.0 A, 25°C | 1.04 V - enables low conduction loss with <1.04 W dissipation at full rated current |
| CJ @ 1 MHz, 4 V | 11 pF - reduces capacitive coupling and improves high-frequency noise immunity |
| IR @ 800 V, 125°C | 150 µA - ensures stable blocking under elevated ambient temperatures in enclosed enclosures |
| RθJA | 84 °C/W - allows natural convection cooling on minimal copper area without thermal vias |
Pinout & Package
Package: SOD-123FL - low-profile, surface-mount plastic case with matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 rated molding compound, and cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of AC source or switch node in flyback/flybuck topologies |
| Cathode | Current exit terminal during forward conduction; marked by band | Connected to output rail or high-side return path; critical for correct polarity in bridge and OR-ing configurations |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance in unsealed industrial environments |
| Low profile SOD-123FL package | Enables ≤0.9 mm board height in ultra-thin power adapters and IoT edge devices |
| Moisture sensitivity level 1 | Eliminates bake requirements before reflow, reducing manufacturing cycle time and cost |
| Halogen-free construction | Complies with IEC 61249-2-21 for environmentally regulated end equipment |
| RoHS compliant | Meets EU Directive 2011/65/EU for restricted hazardous substances in commercial and industrial products |
Applications
| AC/DC Adapter Power Supply | USB-C PD Fast Charging Module |
|---|---|
Use Scenario: Rectifying 90–264 VAC input in compact wall adapters delivering 18–65 W. IC Role / Device Role / Timing Role: Primary-side fast recovery rectifier in DCM/QR flyback topology. Use Value: 250 ns trr and 1.04 V VF reduce switching and conduction losses, improving efficiency above 88% at full load. | Use Scenario: Secondary-side synchronous rectification replacement in 45–100 W USB-C PD chargers. IC Role / Device Role / Timing Role: Output rectifier in active-clamp forward or LLC resonant converter. Use Value: 11 pF CJ and 800 V VRRM suppress ringing and withstand transient overvoltage during hot-plug events. |
| Industrial DC/DC Converter | Smart Home Gateway Power Stage |
Use Scenario: Isolated 24 V input to 5/3.3 V output conversion in programmable logic controllers. IC Role / Device Role / Timing Role: Input rectifier in wide-input buck-boost or SEPIC front-end stage. Use Value: 150 µA IR at 125°C maintains stable regulation in sealed enclosures with limited airflow. | Use Scenario: Auxiliary power supply for Wi-Fi/BLE SoCs and sensor interfaces in battery-backed gateways. IC Role / Device Role / Timing Role: Low-power standby rectifier in multi-rail offline SMPS. Use Value: SOD-123FL footprint and level-1 MSL enable direct integration into high-volume SMT lines without process changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MUR108 | TO-220AC package, 1 A/800 V, trr = 75 ns, VF = 1.25 V @ 1 A | Requires heatsink and through-hole assembly; higher VF increases conduction loss | Preferred where ultra-fast recovery (<100 ns) is prioritized over SMT compatibility |
| Vishay VS-1N4937-M3/54 | SOD-123 package, 1 A/600 V, trr = 200 ns, VF = 1.05 V @ 1 A | Limited to 600 V VRRM; unsuitable for 380 VAC-derived 400 VDC bus designs | Valid alternative only in sub-600 V systems with identical SMT footprint constraints |
Compared with MUR108 and VS-1N4937-M3/54, the RS1KFL uniquely balances 800 V capability, SOD-123FL mountability, and 250 ns recovery in a single low-cost, RoHS-compliant device - making it optimal for space-limited, high-input-voltage consumer and industrial SMPS.
Availability
RS1KFL is available at Aetrix Electronics and suitable for AC/DC adapters, USB-C PD fast charging modules, and industrial DC/DC converters requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for RS1KFL 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.
The RS1KFL belongs to TSC's RS1xFL fast recovery rectifier family, engineered specifically for high-efficiency, high-frequency switching power supplies where low VF, controlled trr, and SMT manufacturability are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS1KFL?
The RS1KFL has a maximum repetitive peak reverse voltage (VRRM) of 800 V, verified per Taiwan Semiconductor's B2103 datasheet. This rating allows safe operation in 380 VAC input circuits after bridge rectification, supporting 400 VDC nominal bus applications. The RS1KFL must not be operated beyond this limit to avoid avalanche breakdown or premature failure.
What is the forward voltage drop (VF) of RS1KFL at 1.0 A and 25°C?
The RS1KFL exhibits a typical forward voltage drop of 1.04 V at 1.0 A and 25°C, with a maximum of 1.30 V under the same conditions. This value is measured using pulse testing (PW = 0.3 ms) and directly impacts conduction loss in power supply designs - for example, resulting in ~1.04 W dissipation at full rated current.
Does RS1KFL have a specified reverse recovery time (trr)?
Yes, the RS1KFL has a specified reverse recovery time (trr) of 250 ns, measured at IF = 0.5 A, IR = 1.0 A, and IRR = 0.25 A. This parameter is confirmed in the Electrical Specifications table of the official datasheet and is critical for minimizing switching losses and EMI in high-frequency SMPS operating above 100 kHz.
What package type does RS1KFL use, and is it compatible with standard SMT processes?
The RS1KFL uses the SOD-123FL package - a low-profile, surface-mount plastic case with matte tin-plated leads. It is fully compatible with standard SMT reflow processes, carries J-STD-020 moisture sensitivity level 1 (no baking required), and meets J-STD-002 solderability standards, ensuring reliable placement in high-volume automated assembly lines.
What is the junction-to-ambient thermal resistance (RθJA) of RS1KFL?
The junction-to-ambient thermal resistance (RθJA) of RS1KFL is 84 °C/W, measured on a standard 5 mm × 5 mm copper pad test board. This value enables passive thermal management in compact layouts - for instance, limiting junction temperature rise to ~84°C above ambient at full 1 A load, assuming no additional heatsinking or forced airflow.
RS1KFL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123F
- 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:
- 1.3 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 250 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 11pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1KFL FAQ
1.How can I place an order for RS1KFL through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1KFL 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 RS1KFL reliable?
The price and inventory of RS1KFL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1KFL is usually 5 days.
3.What payment methods are accepted for RS1KFL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1KFL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1KFL?
RS1KFL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1KFL 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 RS1KFL?
For technical support, including RS1KFL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1KFL requirements.
6.How does Aetrix verify that RS1KFL is sourced from the original manufacturer or authorized distributors?
All RS1KFL 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 RS1KFL meets industry standards.
7.What is the process for return or replacement of RS1KFL?
All RS1KFL units undergo pre-shipment inspection (PSI). If there is an issue with RS1KFL, 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 RS1KFL part is unused and in its original packaging.
Return procedure for RS1KFL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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