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Taiwan Semiconductor Corporation RS1KLS
- Part No.:
- RS1KLS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123H
- Datasheet:
-
RS1KLS.pdf
- Description:
- DIODE GP 800V 1.2A SOD123HE
- Quantity:
- Payment:
- Shipping:
Inventory:37,519
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Product details
Overview
RS1KLS from Taiwan Semiconductor is a 1.2A, 800V fast recovery surface-mount rectifier in SOD-123HE package, designed for high-efficiency DC-DC conversion and switching-mode power supplies with low forward voltage (≤1.3V at 1.2A) and fast reverse recovery (≤300ns). It operates from −55°C to +175°C junction temperature and supports 50A surge current.
For engineers reviewing the RS1KLS datasheet, RS1KLS pinout, RS1KLS application, or RS1KLS equivalent, key selection criteria include repetitive peak reverse voltage (800V), thermal resistance (RθJA = 80°C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance for industrial and automotive-grade power designs.
Technical Context
The RS1KLS is a single-die, unidirectional silicon rectifier optimized for fast switching in high-frequency SMPS topologies. Its 300ns reverse recovery time and 1.3V max forward voltage at 1.2A enable reduced conduction and switching losses compared to standard recovery diodes.
Thermally, it features RθJL = 20°C/W to lead and RθJA = 80°C/W to ambient, supporting compact PCB layouts. The SOD-123HE package includes matte tin-plated leads compliant with J-STD-002 and JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum non-repetitive reverse blocking voltage; defines usable input voltage range in offline or boost converters |
| IF | 1.2 A continuous - Rated average forward current at TA = 75°C; determines steady-state power handling capability |
| IFSM | 50 A - Peak surge current (8.3ms half-sine); supports inrush and transient overload without failure |
| VF | ≤1.3 V at IF = 1.2A, TJ = 25°C - Low conduction loss improves system efficiency and reduces heatsink requirements |
| trr | ≤300 ns - Fast recovery minimizes switching losses and EMI in >100kHz converters |
| TJ max | +175°C - High junction temperature rating enables operation in thermally constrained environments |
| RθJA | 80 °C/W - Thermal resistance from junction to ambient; used to calculate temperature rise under given power dissipation |
Pinout & Package
SOD-123HE surface-mount package with cathode-indicated band; compact footprint (2.60 × 1.40 mm), 0.022g weight, UL 94V-0 molding compound, and matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or ground return) in rectification path |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or positive bus; blocks up to 800V reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | ≤300 ns enables efficient operation in 100–500 kHz SMPS without excessive switching loss or ringing |
| High surge current rating | 50 A IFSM withstands startup surges and short-circuit transients in DC-DC and inverter outputs |
| Low forward voltage | ≤1.3 V at full rated current reduces conduction loss and thermal stress in high-duty-cycle applications |
| MSL Level 1 rating | No floor life limitation or bake requirement before reflow; simplifies automated SMT assembly logistics |
| Halogen-free & RoHS | Complies with environmental regulations for industrial, automotive, and consumer end-equipment certifications |
Applications
| AC-DC Adapter Power Supply | Automotive DC-DC Converter |
|---|---|
Use Scenario: Secondary-side rectification in 12–24V output flyback or forward converters powering IoT gateways and industrial controllers. IC Role / Device Role / Timing Role: Unidirectional current steering device converting transformer AC output to regulated DC; no timing function. Use Value: 800V VRRM provides margin against reflected voltage spikes; 300ns trr limits switching loss during high-frequency operation. | Use Scenario: Output rectification in 48V-to-12V bidirectional DC-DC modules for ADAS domain controllers and body electronics. IC Role / Device Role / Timing Role: High-reliability discrete rectifier handling transient-rich automotive load dumps and cold-crank conditions. Use Value: 175°C TJ max and MSL 1 support under-hood placement; 50A IFSM absorbs load dump energy without derating. |
| Industrial Motor Drive Inverter | Renewable Energy Charge Controller |
Use Scenario: Freewheeling diode across IGBTs in 3-phase inverter legs for HVAC compressors and servo drives. IC Role / Device Role / Timing Role: Passive freewheeling path during IGBT turn-off; critical for safe commutation and voltage clamping. Use Value: Low VF (≤1.3V) minimizes conduction loss during extended freewheeling periods; robust thermal design sustains 150°C case temperatures. | Use Scenario: MPPT-stage rectification in solar charge controllers converting PV array output to battery-charging DC. IC Role / Device Role / Timing Role: High-voltage, high-temp rectifier interfacing unregulated PV source with buck/boost regulation stage. Use Value: 800V VRRM accommodates open-circuit PV voltages up to ~650V; halogen-free construction meets IEC 61215 reliability standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | VRRM = 600V, IF = 1A, trr = 150ns, SOD-123 package | Lower voltage rating and current; faster recovery but less rugged surge capability | Select when 600V system margin suffices and ultra-fast recovery is prioritized over surge robustness |
| SB180 | VRRM = 800V, IF = 1A, trr ≈ 500ns, DO-214AA package | Larger through-hole package; slower recovery; higher VF (~1.55V) | Choose only if board layout requires axial/DO-214AA footprint and thermal budget allows higher conduction loss |
Compared with STTH1L06S and SB180, the RS1KLS uniquely balances 800V blocking, 1.2A current, 300ns recovery, and SOD-123HE compactness-making it optimal for space-constrained, high-reliability 48–400V DC-DC systems where MSL 1 and 175°C operation are required.
Availability
RS1KLS is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose power rectification requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for RS1KLS 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and automotive markets since 1979.
The RS1KLS belongs to TSC's RS1xLS fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in thermally demanding environments.
FAQ
What is the maximum junction temperature rating for RS1KLS?
The RS1KLS has a maximum junction temperature (TJ) of +175°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version E2304). This rating allows reliable operation in high-ambient environments such as under-hood automotive locations or enclosed industrial power supplies. Derating curves confirm sustained 1.2A current capability up to 125°C case temperature. The RS1KLS must be mounted on appropriate copper area to maintain this limit under full load.
Does RS1KLS have a specified moisture sensitivity level (MSL)?
Yes, RS1KLS is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and does not require dry-packaging or baking prior to reflow soldering. This is confirmed in the "Features" section of the Taiwan Semiconductor datasheet (E2304). The SOD-123HE package construction and lead finish meet all MSL 1 requirements, enabling direct use in high-volume automated SMT lines without process modification. RS1KLS shares this MSL rating with the entire RS1xLS series.
What is the reverse recovery time (trr) of RS1KLS and under what test conditions?
The RS1KLS reverse recovery time is ≤300 ns, measured under the condition: IF = 0.5A, IR = 1.0A, IRR = 0.25A, per the Electrical Specifications table in the Taiwan Semiconductor RS1JLS–RS1MLS datasheet (E2304). This value is typical for fast recovery diodes in the SOD-123HE form factor and directly impacts switching loss in high-frequency converters. The RS1KLS achieves this performance while maintaining 800V VRRM and 1.2A IF ratings.
Is RS1KLS RoHS and halogen-free compliant?
Yes, RS1KLS is both RoHS compliant and halogen-free, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet (E2304). Compliance is verified per EU Directive 2011/65/EU and IEC 61249-2-21:2011. The molding compound, lead finish, and internal materials meet strict restrictions on lead, cadmium, mercury, hexavalent chromium, PBB, PBDE, and chlorine/bromine content. RS1KLS is suitable for export to EU, Japan, and other regulated markets requiring full substance declarations.
What marking code appears on the RS1KLS device body?
The RS1KLS is marked with "RKLS" on its cathode-banded surface, as defined in the Absolute Maximum Ratings table of the Taiwan Semiconductor datasheet (E2304). This 4-character laser marking distinguishes it from RS1JLS (RJLS) and RS1MLS (RMLS) within the same SOD-123HE family. The marking is located adjacent to the cathode band and remains legible after standard reflow and cleaning processes. Visual inspection of "RKLS" confirms correct variant identification during incoming quality checks or field replacement.
RS1KLS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123H
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 1.2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 1.2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 300 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123HE
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1KLS FAQ
1.How can I place an order for RS1KLS through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1KLS 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 RS1KLS reliable?
The price and inventory of RS1KLS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1KLS is usually 5 days.
3.What payment methods are accepted for RS1KLS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1KLS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1KLS?
RS1KLS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1KLS 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 RS1KLS?
For technical support, including RS1KLS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1KLS requirements.
6.How does Aetrix verify that RS1KLS is sourced from the original manufacturer or authorized distributors?
All RS1KLS 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 RS1KLS meets industry standards.
7.What is the process for return or replacement of RS1KLS?
All RS1KLS units undergo pre-shipment inspection (PSI). If there is an issue with RS1KLS, 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 RS1KLS part is unused and in its original packaging.
Return procedure for RS1KLS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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