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Taiwan Semiconductor Corporation RS1KLW
- Part No.:
- RS1KLW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
RS1KLW.pdf
- Description:
- DIODE GEN PURP 800V 1A SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:7,398
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Product details
Overview
RS1KLW from Taiwan Semiconductor is a 1A, 800V fast recovery surface-mount rectifier in SOD-123W package, featuring 250ns reverse recovery time, 1.3V max forward voltage at 1A, and 5µA max reverse leakage at 25°C, used in DC-DC converters and switching-mode inverters.
For engineers reviewing the RS1KLW datasheet, RS1KLW pinout, RS1KLW application, or RS1KLW equivalent, key selection criteria include VRRM=800V, trr=250ns, VF≤1.3V, IR≤5µA at 25°C, and SOD-123W thermal performance (RθJA=80°C/W).
Technical Context
The RS1KLW is a single-die, glass-passivated silicon PN junction rectifier optimized for high-frequency switching applications. Its 800V repetitive peak reverse voltage and 250ns reverse recovery time enable efficient operation in SMPS topologies where rapid turn-off minimizes switching losses.
Thermally, it supports continuous operation up to TJ=175°C with RθJL=25°C/W and RθJA=80°C/W, and its matte tin-plated leads meet J-STD-002 solderability requirements. Polarity is marked by a cathode band on the SOD-123W case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - maximum non-repetitive reverse voltage the device blocks without breakdown |
| IF | 1 A - average forward current rating under specified thermal conditions |
| trr | 250 ns - time required to transition from conduction to blocking state, critical for high-frequency efficiency |
| VF (max) | 1.3 V @ 1A, 25°C - forward voltage drop determining conduction loss and thermal load |
| IR (max) | 5 µA @ 800V, 25°C - reverse leakage current affecting standby power and high-impedance circuit integrity |
| TJ max | +175°C - maximum junction temperature enabling operation in thermally constrained environments |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance defining PCB heatsinking requirements |
Pinout & Package
Package: SOD-123W - low-profile, surface-mount plastic case with matte tin-plated leads, polarity indicated by cathode band, moisture sensitivity level 1 (J-STD-020), UL 94V-0 rated molding compound, weight ≈ 0.016g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of input source in rectification path |
| Cathode | Forward current exit point | Marked by band; connects to output capacitor or load return in bridge/center-tap configurations |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance in industrial ambient conditions |
| Low profile SOD-123W package | Enables compact board layout and compatibility with automated pick-and-place equipment |
| 250 ns reverse recovery time | Reduces switching losses in 100–500 kHz SMPS designs compared to standard recovery diodes |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and environmental regulations for consumer and industrial end equipment |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters operating at 100–300 kHz. IC Role / Device Role / Timing Role: Unidirectional current switch converting high-frequency AC to regulated DC output. Use Value: 250 ns trr and 1.3 V VF minimize conduction and switching losses, improving overall converter efficiency by ~1.2% vs. slower 1A rectifiers. | Use Scenario: Output stage freewheeling or anti-parallel clamping in half-bridge motor inverters. IC Role / Device Role / Timing Role: Fast-recovery clamp diode managing inductive kickback during MOSFET turn-off. Use Value: 800 V VRRM withstands bus transients up to 650 V DC-link; 30 A IFSM handles short-circuit surge events. |
| Industrial Power Supplies | LED Driver Circuits |
Use Scenario: Input rectification in universal-input (90–264 VAC) offline SMPS for PLCs and HMIs. IC Role / Device Role / Timing Role: Primary-side bridge rectifier component in compact, convection-cooled enclosures. Use Value: 175°C TJ max and RθJA=80°C/W allow full 1A rating without forced air, reducing system cooling cost. | Use Scenario: Constant-current regulation loop rectification in isolated LED drivers for street lighting. IC Role / Device Role / Timing Role: High-voltage output rectifier sustaining 800 V reverse stress across LED string open-circuit faults. Use Value: 5 µA IR at 25°C ensures minimal standby current drain, supporting Energy Star Tier 2 standby compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | VRRM=800V, trr=150ns, VF=1.15V typ @ 1A, TO-277A package | Lower trr improves high-frequency efficiency but requires larger footprint and manual rework compatibility | Preferred where <200ns trr is mandatory and board space allows TO-277A mounting |
| ES1J | VRRM=600V, trr=35ns, VF=1.7V max @ 1A, SMA package | Lower voltage rating limits use to ≤400 VAC input systems; faster trr trades off higher VF | Suitable for cost-sensitive 600V-class designs where ultra-fast recovery outweighs conduction loss penalty |
Compared with STTH1R08 and ES1J, the RS1KLW offers optimal balance of 800V rating, 250ns trr, and SOD-123W manufacturability-making it ideal for automated, space-constrained 1A SMPS where thermal margin and RoHS compliance are prioritized over sub-200ns speed.
Availability
RS1KLW 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 production continuity.
Supply support for RS1KLW 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 RS1KLW belongs to TSC's RS1xLW fast recovery rectifier family, designed specifically for high-efficiency, surface-mount switching power conversion in space- and thermal-constrained applications.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS1KLW?
The RS1KLW has a maximum repetitive peak reverse voltage (VRRM) of 800 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This rating defines the highest reverse voltage the RS1KLW can block repeatedly without breakdown under normal operating conditions and is critical for selecting appropriate input voltage derating margins in offline power supplies.
What is the reverse recovery time (trr) specification for RS1KLW?
The RS1KLW has a reverse recovery time (trr) of 250 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the Electrical Specifications section of the Taiwan Semiconductor datasheet. This value applies specifically to RS1KLW and RS1MLW variants, distinguishing them from faster 150 ns variants like RS1DLW–RS1JLW, and directly impacts switching loss in high-frequency SMPS designs.
Is RS1KLW RoHS and halogen-free compliant?
Yes, the RS1KLW is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor RS1DLW–RS1MLW datasheet (Version C2103). This compliance is verified for the SOD-123W package configuration shipped under the RS1KLW ordering code and supports environmental requirements for industrial and consumer end equipment.
What is the thermal resistance from junction to ambient (RθJA) for RS1KLW?
The RS1KLW has a junction-to-ambient thermal resistance (RθJA) of 80 °C/W, specified under standard test conditions (TA = 25°C) in the Thermal Performance section of the Taiwan Semiconductor datasheet. This value assumes standard JEDEC 2-layer PCB mounting and guides heatsink or copper pour design to maintain TJ ≤ 175°C at 1 A DC forward current.
What marking code appears on the RS1KLW device body?
The RS1KLW is marked with "RKLW" on its SOD-123W case, as shown in the Mechanical Data and Ordering Information sections of the Taiwan Semiconductor datasheet. This 4-character laser marking distinguishes it from other members of the RS1xLW family (e.g., RDLW, RGLW) and confirms the 800 V VRRM rating during visual inspection or automated optical verification.
RS1KLW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123W
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 175°C
RS1KLW FAQ
1.How can I place an order for RS1KLW through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1KLW 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 RS1KLW reliable?
The price and inventory of RS1KLW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1KLW is usually 5 days.
3.What payment methods are accepted for RS1KLW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1KLW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1KLW?
RS1KLW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1KLW 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 RS1KLW?
For technical support, including RS1KLW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1KLW requirements.
6.How does Aetrix verify that RS1KLW is sourced from the original manufacturer or authorized distributors?
All RS1KLW 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 RS1KLW meets industry standards.
7.What is the process for return or replacement of RS1KLW?
All RS1KLW units undergo pre-shipment inspection (PSI). If there is an issue with RS1KLW, 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 RS1KLW part is unused and in its original packaging.
Return procedure for RS1KLW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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