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Taiwan Semiconductor Corporation RS2KFS
- Part No.:
- RS2KFS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
RS2KFS.pdf
- Description:
- DIODE GEN PURP 800V 2A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:7,000
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Product details
Overview
RS2KFS from Taiwan Semiconductor is a 800 V, 2 A fast recovery surface-mount rectifier in SOD-128 package, featuring 500 ns reverse recovery time, 1.06 V forward voltage at 2 A/25°C, and 175°C maximum junction temperature. It serves as a primary output rectifier in high-frequency switching power supplies requiring low conduction loss and reliable thermal performance.
For engineers reviewing the RS2KFS datasheet, RS2KFS pinout, RS2KFS application, or RS2KFS equivalent, key selection criteria include its 800 V repetitive peak reverse voltage, 50 A surge current rating, 16°C/W junction-to-lead thermal resistance, and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
The RS2KFS employs a glass-passivated silicon die optimized for fast recovery (trr ≤ 500 ns) under 0.5 A forward / 1.0 A reverse test conditions, enabling efficient operation in 50–500 kHz SMPS topologies. Its single-die configuration and SOD-128 low-profile package support high-power density designs with minimal board space.
Thermal design is enabled by a verified junction-to-lead resistance of 16°C/W and junction-to-ambient resistance of 73°C/W when mounted on a 5 mm × 5 mm Cu pad. The device operates across –55°C to +175°C junction temperature range, supporting industrial and automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports DC bus voltages up to 565 VDC in full-wave rectification without breakdown |
| IF | 2 A continuous - delivers rated output current in compact SOD-128 footprint without derating at 75°C ambient |
| trr | 500 ns - enables stable operation in high-frequency flyback and LLC converters with reduced switching loss |
| VF @ 2A/25°C | 1.06 V - limits conduction loss to ≤2.12 W at full load, easing thermal management |
| RθJL | 16 °C/W - allows direct thermal path to PCB copper, supporting >1.5 W dissipation with 25°C rise above lead temperature |
| IR @ 800V/125°C | 40 µA - ensures minimal leakage-induced standby power loss in offline adapters |
Pinout & Package
Package: SOD-128 - low-profile surface-mount plastic package (4.40 × 2.70 × 1.20 mm), moisture sensitivity level 1, matte tin-plated leads, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to transformer secondary or input rail; accepts up to 140 A surge (1 ms) during startup |
| Cathode | Output terminal for forward conduction | Delivers rectified DC to filter capacitor; polarity marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling; meets JESD201 Class 2 whisker resistance |
| Fast recovery (500 ns) | Reduces reverse recovery charge (Qrr), minimizing EMI and diode-induced switching losses in high-frequency converters |
| SOD-128 low-profile package | Enables <1.2 mm board height in ultra-thin power adapters and LED drivers |
| RoHS & halogen-free compliance | Supports global environmental regulations and eliminates corrosive outgassing in sealed enclosures |
Applications
| AC-DC Power Adapters | Industrial DC-DC Converters |
|---|---|
Use Scenario: 12 V/2 A output stage in universal-input 90–264 VAC wall adapters for IoT gateways. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 500 ns trr and 1.06 V VF minimize power loss and heat generation, enabling fanless operation within 25 mm × 25 mm PCB area. | Use Scenario: Secondary-side rectification in 48 V input, 5 V/3 A isolated DC-DC modules for PLC I/O cards. IC Role / Device Role / Timing Role: Fast-recovery rectifier handling 200–300 kHz synchronous rectification timing constraints. Use Value: 175°C TJ max and 16°C/W RθJL allow sustained 2 A load at 85°C ambient without thermal shutdown. |
| LED Driver Power Supplies | Automotive Body Control Modules |
Use Scenario: Constant-current LED driver with PFC front-end and flyback secondary in streetlight fixtures. IC Role / Device Role / Timing Role: Main output rectifier operating at 65 kHz with high dv/dt stress during MOSFET turn-off. Use Value: 800 V VRRM withstands reflected transients; 40 µA IR at 125°C prevents luminance drift in high-temperature outdoor enclosures. | Use Scenario: 12 V auxiliary power supply in BCM units exposed to under-hood temperatures up to 105°C ambient. IC Role / Device Role / Timing Role: Input rectifier for buck converter feeding microcontroller and CAN transceivers. Use Value: –55°C to +175°C operating range and J-STD-020 Level 1 moisture rating ensure robustness during reflow and field operation. |
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 800 V VRRM and 2 A IF, but trr = 75 ns (faster), VF = 1.15 V @ 2A/25°C (higher), TO-220AC package | Requires through-hole mounting and heatsink; unsuitable for ultra-thin SMT-only designs | Select when lower trr is critical and board space permits larger footprint and thermal mass |
| ES2J | Same SOD-128 package and 600 V VRRM, trr = 35 ns, VF = 0.95 V @ 2A/25°C, but lower voltage rating | Not suitable for 800 V bus applications; limited to ≤420 VDC output stages | Select only if system peak reverse voltage remains ≤600 V and faster recovery is prioritized over voltage margin |
Compared with STTH2R08 and ES2J, the RS2KFS provides optimal balance of 800 V rating, SOD-128 SMT compatibility, and 500 ns trr for cost-sensitive industrial power supplies where moderate recovery speed suffices and board height is constrained.
Availability
RS2KFS is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC converters, LED drivers, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for RS2KFS 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 RS2KFS belongs to TSC's RS2xFS fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC conversion in space-constrained SMT applications.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS2KFS?
The RS2KFS has a maximum repetitive peak reverse voltage (VRRM) of 800 V, as specified in the absolute maximum ratings table. This rating is confirmed across all official TSC documentation for the RS2KFS variant and defines the highest transient reverse voltage the device can block repeatedly without breakdown under normal operating conditions. The RS2KFS must not be subjected to reverse voltages exceeding 800 V in circuit design.
Does RS2KFS support automated SMT assembly, and what is its moisture sensitivity level?
Yes, RS2KFS supports automated surface-mount assembly and is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to reflow. Its SOD-128 package features matte tin-plated leads compliant with J-STD-002 solderability requirements, ensuring reliable wetting and joint formation during standard lead-free reflow profiles.
What is the forward voltage drop of RS2KFS at 2 A and 125°C junction temperature?
The forward voltage drop of RS2KFS is 0.93 V at 2 A and 125°C junction temperature, as measured under pulsed conditions (PW = 0.3 ms). This value reflects reduced conduction loss at elevated temperatures compared to room-temperature operation (1.06 V), improving efficiency stability in thermally demanding applications such as enclosed LED drivers or industrial power modules.
Can RS2KFS replace RS2JFS in an existing design without layout changes?
No, RS2KFS cannot directly replace RS2JFS without verifying system-level voltage stress margins. While both share the same SOD-128 package and pinout, RS2JFS is rated for 600 V VRRM versus RS2KFS's 800 V rating. Substituting RS2KFS may be acceptable if the circuit's peak reverse voltage exceeds 600 V, but the higher VRRM does not guarantee improved performance-reverse recovery time (500 ns vs. 250 ns) and forward voltage differ, potentially affecting EMI and efficiency.
What thermal resistance values apply to RS2KFS when mounted on a standard PCB?
When mounted on a standard 5 mm × 5 mm copper pad test board, RS2KFS exhibits a junction-to-lead thermal resistance (RθJL) of 16°C/W and a junction-to-ambient thermal resistance (RθJA) of 73°C/W. These values are measured per JEDEC standards and enable accurate thermal modeling for power dissipation up to 1.5 W at 25°C ambient, assuming no additional heatsinking beyond the PCB copper area.
RS2KFS 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):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS2KFS FAQ
1.How can I place an order for RS2KFS through Aetrix?
Please submit a Request for Quotation (RFQ) for RS2KFS 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 RS2KFS reliable?
The price and inventory of RS2KFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS2KFS is usually 5 days.
3.What payment methods are accepted for RS2KFS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS2KFS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS2KFS?
RS2KFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS2KFS 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 RS2KFS?
For technical support, including RS2KFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS2KFS requirements.
6.How does Aetrix verify that RS2KFS is sourced from the original manufacturer or authorized distributors?
All RS2KFS 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 RS2KFS meets industry standards.
7.What is the process for return or replacement of RS2KFS?
All RS2KFS units undergo pre-shipment inspection (PSI). If there is an issue with RS2KFS, 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 RS2KFS part is unused and in its original packaging.
Return procedure for RS2KFS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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