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Taiwan Semiconductor Corporation RS2KFL
- Part No.:
- RS2KFL
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
RS2KFL.pdf
- Description:
- 250NS, 2A, 800V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:9,905
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Product details
Overview
RS2KFL from Taiwan Semiconductor is a 2 A, 800 V fast recovery surface-mount rectifier in SOD-123FL package, featuring 1.09 V forward voltage at 2 A/25°C, 250 ns reverse recovery time, and 9 pF junction capacitance. It serves as a primary AC/DC input stage rectifier in compact switching power supplies.
For engineers reviewing the RS2KFL datasheet, RS2KFL pinout, RS2KFL application, or RS2KFL equivalent, key selection criteria include peak reverse voltage rating, thermal resistance (RθJL = 81°C/W), low leakage (<5 µA @ 25°C), and compatibility with automated SMT placement on standard PCB pads.
Technical Context
The RS2KFL employs a glass-passivated silicon die optimized for fast recovery (trr ≤ 250 ns) and low forward conduction loss across its 800 V VRRM rating. Its single-die configuration and SOD-123FL package enable high power density in space-constrained DC/DC converters.
Thermal performance is defined by RθJL = 81°C/W and RθJA = 116°C/W on a 5 mm × 5 mm Cu pad, supporting continuous 2 A operation up to +125°C junction temperature with appropriate board layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Withstands peak reverse voltage in 560 V RMS bridge rectifier applications |
| IF | 2 A - Continuous forward current rating at TA = 25°C with derating above 25°C |
| trr | 250 ns - Enables efficient operation in 100–500 kHz SMPS without excessive switching loss |
| VF | 1.09 V @ 2 A, 25°C - Low conduction loss improves efficiency in high-duty-cycle rectification |
| CJ | 9 pF @ 1 MHz, 4 V - Minimizes capacitive coupling noise in high-frequency switching nodes |
| IR | ≤5 µA @ 25°C - Reduces standby power loss in offline adapters and auxiliary supplies |
Pinout & Package
SOD-123FL surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for positive half-cycle conduction | Connected to AC input or transformer secondary; requires adequate copper pour for thermal dissipation |
| Cathode | Output terminal for rectified DC output | Marked by band; ties to bulk capacitor or downstream converter input; polarity-critical for circuit function |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability under humid or thermally cycling conditions without encapsulation degradation |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing overhead and PCB warpage risk |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental regulations for consumer and industrial end equipment |
| UL 94V-0 molding compound | Provides flame-retardant housing essential for safety-certified power supplies (e.g., UL/EN 62368-1) |
Applications
| AC/DC Adapter Input Stage | USB PD Power Supply Output Rectification |
|---|---|
Use Scenario: 800 V-rated input rectification in universal-input (90–264 VAC) offline flyback adapters. IC Role / Device Role / Timing Role: Primary-side unidirectional current switch converting AC line to pulsating DC before bulk capacitor. Use Value: 250 ns trr limits reverse recovery loss during zero-crossing, improving full-load efficiency by ~0.4% vs. slower 1N4007 alternatives. | Use Scenario: Secondary-side synchronous rectification replacement in 65 W USB PD chargers operating at 100–200 kHz. IC Role / Device Role / Timing Role: Fast-recovery diode in center-tapped or active-clamp forward topology output stage. Use Value: 9 pF CJ reduces high-frequency ringing and EMI generation compared to 16 pF RS2DFL/RS2GFL variants. |
| Industrial DC/DC Converter Input | Smart Home IoT Power Module |
Use Scenario: Input rectification in 24 VDC-powered isolated DC/DC modules used in PLC I/O cards. IC Role / Device Role / Timing Role: Bridge leg component handling transient surges up to 40 A IFSM (8.3 ms). Use Value: RθJL = 81°C/W enables direct thermal coupling to PCB ground plane, avoiding heatsink in space-limited modules. | Use Scenario: Compact wall-plug power module for battery-powered smart speakers and sensors. IC Role / Device Role / Timing Role: High-voltage rectifier in miniaturized 5 V/1 A buck-derived supply with integrated LDO. Use Value: SOD-123FL footprint (1.7 × 3.0 mm) saves >40% board area versus SMA packages while maintaining 800 V isolation margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R08 | Same 2 A / 800 V rating; TO-220AC package; higher RθJA (50°C/W on large heatsink only) | Requires heatsink and through-hole assembly; unsuitable for ultra-thin or double-sided SMT designs | Choose STTH2R08 only when thermal load exceeds SOD-123FL capability or legacy TO-220 footprint is fixed |
| ON Semi MURS280 | 2 A / 800 V; SOD-123FL; VF = 1.15 V @ 2 A (higher conduction loss); trr = 200 ns (slightly faster) | Marginally lower efficiency at full load but tighter trr tolerance for critical EMI-sensitive layouts | Select MURS280 if measured EMI peaks exceed limits with RS2KFL, accepting 0.06 V higher VF penalty |
Compared with STTH2R08 and MURS280, the RS2KFL delivers optimal balance of SMT compatibility, thermal performance (RθJL = 81°C/W), and conduction efficiency (VF = 1.09 V), making it preferred for high-density, convection-cooled power modules where board area and assembly cost are constrained.
Availability
RS2KFL is available at Aetrix Electronics and suitable for AC/DC adapters, USB PD power supplies, industrial DC/DC converters, and smart home IoT power modules requiring stable component supply and consistent SOD-123FL sourcing.
Supply support for RS2KFL 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 and protection markets since 1979.
The RS2KFL belongs to TSC's RS2xFL fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability SMT rectification in compact offline and isolated DC/DC power supplies.
FAQ
What is the maximum junction temperature rating for RS2KFL?
The RS2KFL has a maximum junction temperature (TJ) of +150°C, validated per absolute maximum ratings in the official Taiwan Semiconductor datasheet Version B2103. Operation at this limit requires strict thermal design-such as 5 mm × 5 mm Cu pad-to maintain reliability. The RS2KFL must not be operated beyond this temperature, as prolonged exposure degrades the glass-passivated junction integrity.
Does RS2KFL support lead-free reflow soldering per JEDEC J-STD-020?
Yes, the RS2KFL is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the SOD-123FL package is rated for peak reflow temperatures up to 260°C. The device carries moisture sensitivity level 1 (MSL-1), eliminating pre-bake requirements before assembly-critical for high-throughput SMT lines handling RS2KFL.
How does RS2KFL compare to RS2JFL in terms of forward voltage and reverse recovery?
The RS2KFL and RS2JFL share identical forward voltage (1.09 V @ 2 A, 25°C) and reverse recovery time (250 ns) specifications per Taiwan Semiconductor's B2103 datasheet. Both are rated for 600 V (RS2JFL) and 800 V (RS2KFL) VRRM, meaning RS2KFL provides higher voltage margin without trade-offs in speed or conduction loss-making it a drop-in upgrade where 800 V standoff is required.
Is RS2KFL suitable for use in automotive infotainment power supplies?
The RS2KFL is not AEC-Q101 qualified and is not recommended for automotive safety-critical or engine-bay applications. However, it may be used in non-safety infotainment subsystems (e.g., display backlight or USB hub power) where ambient temperature remains below +85°C and no AEC-Q101 validation is mandated. For such cases, RS2KFL must be validated per system-level thermal and lifetime requirements-not assumed qualified by default.
What is the marking code printed on the RS2KFL device body?
The RS2KFL is marked with "R2KF" on its top surface, per the Taiwan Semiconductor ordering information table in datasheet Version B2103. This 4-character laser marking-along with date code (YW) and factory code (F)-enables traceability and visual identification on the SOD-123FL package. No other marking variant applies to the RS2KFL; "R2KF" uniquely identifies this 800 V variant within the RS2xFL series.
RS2KFL 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):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 250 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 9pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS2KFL FAQ
1.How can I place an order for RS2KFL through Aetrix?
Please submit a Request for Quotation (RFQ) for RS2KFL 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 RS2KFL reliable?
The price and inventory of RS2KFL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS2KFL is usually 5 days.
3.What payment methods are accepted for RS2KFL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS2KFL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS2KFL?
RS2KFL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS2KFL 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 RS2KFL?
For technical support, including RS2KFL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS2KFL requirements.
6.How does Aetrix verify that RS2KFL is sourced from the original manufacturer or authorized distributors?
All RS2KFL 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 RS2KFL meets industry standards.
7.What is the process for return or replacement of RS2KFL?
All RS2KFL units undergo pre-shipment inspection (PSI). If there is an issue with RS2KFL, 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 RS2KFL part is unused and in its original packaging.
Return procedure for RS2KFL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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