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Taiwan Semiconductor Corporation RS1GLW
- Part No.:
- RS1GLW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
RS1GLW.pdf
- Description:
- DIODE GEN PURP 400V 1A SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:18,768
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Product details
Overview
RS1GLW from Taiwan Semiconductor is a 1A, 400V fast recovery surface-mount rectifier diode in SOD-123W package, featuring 150 ns reverse recovery time, 1.3 V max forward voltage at 1 A, and 5 µA max reverse leakage at 25°C. It serves as a primary output rectifier in DC-DC converters and switching-mode power supplies requiring high efficiency and low profile.
For engineers reviewing the RS1GLW datasheet, RS1GLW pinout, RS1GLW application, or RS1GLW equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (25 °C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and compatibility with automated SMT placement.
Technical Context
The RS1GLW employs a glass-passivated silicon junction to ensure stable reverse blocking and fast recovery performance. Its single-die construction and SOD-123W low-profile package support high-density PCB layouts while maintaining robust thermal dissipation via direct lead conduction.
Designed for operation across –55°C to +175°C junction temperature range, the RS1GLW delivers consistent forward conduction and minimal reverse leakage (≤150 µA at 125°C) under transient thermal stress-critical for reliability in switching converters and inverters operating near thermal limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines safe operating ceiling in 400 V-rated power rails. |
| IF | 1 A continuous - Rated average forward current; supports sustained 1 A DC output in compact SMPS designs. |
| trr | 150 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables high-frequency switching (>1 MHz) with low switching loss. |
| VF (max) | 1.3 V @ 1 A, 25°C - Directly impacts conduction loss and thermal rise in rectification stage; lower than standard PN diodes. |
| RθJL | 25 °C/W - Junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper, supporting >0.8 W power dissipation at rated IF. |
| IR (max) | 5 µA @ 25°C, 400 V - Low leakage preserves efficiency in standby and light-load conditions; critical for energy-efficient converters. |
Pinout & Package
SOD-123W is a low-profile, surface-mount plastic package with two terminals: anode and cathode. Polarity is marked by a visible cathode band on the body. Leads are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connects to input/switching node side of rectifier circuit; must withstand full surge current (IFSM = 30 A). |
| Cathode | Forward current exit / reverse blocking terminal | Connects to output filter capacitor; polarity marking ensures correct orientation during automated placement and prevents reverse bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term stability of reverse leakage and breakdown voltage under humidity and thermal cycling. |
| J-STD-020 Level 1 moisture sensitivity | Eliminates need for dry-packaging or bake-out prior to reflow; supports standard SMT assembly flow. |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for industrial and consumer end-equipment safety certifications. |
| RoHS and halogen-free (IEC 61249-2-21) | Complies with global environmental regulations and enables use in green electronics supply chains. |
Applications
| AC-DC Adapter Output Rectification | DC-DC Converter Secondary Side |
|---|---|
Use Scenario: 12 V/1 A isolated flyback adapter powering IoT gateways. IC Role / Device Role / Timing Role: Primary output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 150 ns trr minimizes switching loss at 65–100 kHz; 1.3 V VF keeps conduction loss below 1.3 W at full load. | Use Scenario: 5 V/1 A buck-derived auxiliary rail in telecom power module. IC Role / Device Role / Timing Role: Synchronous rectifier replacement where cost-sensitive design favors fast diode over MOSFET driver complexity. Use Value: SOD-123W footprint allows drop-in replacement in space-constrained layouts; 25 °C/W RθJL maintains TJ < 125°C at 1 A. |
| Switching Inverter Freewheeling Diode | Industrial Sensor Power Supply Input Stage |
Use Scenario: 24 V H-bridge motor drive with regenerative braking. IC Role / Device Role / Timing Role: Freewheeling path for inductive kickback during PWM off-time. Use Value: 400 V VRRM safely clamps transients up to 350 V bus; 30 A IFSM handles short-circuit surges without failure. | Use Scenario: 24 V to 3.3 V step-down converter for vibration sensor node. IC Role / Device Role / Timing Role: Input bridge rectifier feeding bulk capacitor in offline-capable auxiliary supply. Use Value: 5 µA IR at 25°C preserves battery life in always-on monitoring; J-STD-020 Level 1 simplifies manufacturing logistics. |
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 MUR140 | Same 1 A / 400 V rating, but TO-220AC package (larger, through-hole); trr = 50 ns (faster), VF = 1.25 V (slightly lower). | Requires PCB redesign for through-hole mounting; better suited for higher-power, lower-frequency (<50 kHz) designs with heatsinking. | Select when board-level thermal management permits larger footprint and faster recovery is prioritized over SMT automation. |
| Vishay VS-1N4937-M3/54 | SOD-123 package (not SOD-123W); same 1 A / 400 V, but trr = 200 ns (slower), VF = 1.3 V, RθJA = 125 °C/W (higher thermal resistance). | Limited to lower ambient temperatures or derated current due to inferior thermal performance; no J-STD-020 Level 1 rating. | Consider only if SOD-123W footprint is unavailable and thermal margin exceeds 20°C at 0.7 A. |
Compared with MUR140 and VS-1N4937-M3/54, the RS1GLW uniquely balances SMT manufacturability (SOD-123W, Level 1), mid-speed recovery (150 ns), and industry-leading thermal resistance (25 °C/W), making it optimal for compact, high-volume 1 A switching power supplies.
Availability
RS1GLW is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose rectification requiring stable component supply, RoHS compliance, and automated SMT placement capability.
Supply support for RS1GLW 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 RS1GLW belongs to TSC's RS1xLW fast recovery rectifier family, engineered specifically for high-efficiency, space-constrained switching power supplies where low profile, low leakage, and reliable SMT assembly are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage rating for RS1GLW?
The RS1GLW has a maximum repetitive peak reverse voltage (VRRM) of 400 V. This rating defines the highest reverse voltage the diode can block repeatedly without avalanche breakdown under normal operating conditions. It is verified per JEDEC test standards and applies across the full operating temperature range (–55°C to +175°C). Designers must ensure system transient voltages remain below this value with appropriate safety margin.
Does RS1GLW support automated surface-mount assembly without moisture preconditioning?
Yes, RS1GLW is rated J-STD-020 Level 1 for moisture sensitivity, meaning it may be stored and processed in standard factory environments without dry packing or baking prior to reflow soldering. This eliminates handling steps and reduces risk of popcorning during assembly-critical for high-throughput SMT lines producing power supplies and adapters using RS1GLW.
What is the typical forward voltage drop of RS1GLW at rated current?
The RS1GLW exhibits a maximum forward voltage (VF) of 1.3 V at 1 A forward current and 25°C junction temperature. Typical VF is lower, but design calculations should use the 1.3 V maximum to ensure worst-case conduction loss and thermal margin. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects during testing.
How does the thermal performance of RS1GLW compare to standard SOD-123 rectifiers?
RS1GLW achieves a junction-to-lead thermal resistance (RθJL) of 25 °C/W-significantly lower than typical SOD-123 devices (~45–60 °C/W)-due to its SOD-123W enhanced leadframe design. This allows RS1GLW to dissipate ~0.85 W at 1 A with ≤25°C temperature rise above lead temperature, improving reliability in thermally dense layouts where RS1GLW is used.
Is RS1GLW halogen-free and RoHS compliant?
Yes, RS1GLW is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and all homogeneous materials meet EU Directive 2011/65/EU requirements. This certification is documented in TSC's material declarations and applies to all production lots of RS1GLW.
RS1GLW 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):
- 400 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):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 175°C
RS1GLW FAQ
1.How can I place an order for RS1GLW through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1GLW 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 RS1GLW reliable?
The price and inventory of RS1GLW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1GLW is usually 5 days.
3.What payment methods are accepted for RS1GLW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1GLW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1GLW?
RS1GLW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1GLW 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 RS1GLW?
For technical support, including RS1GLW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1GLW requirements.
6.How does Aetrix verify that RS1GLW is sourced from the original manufacturer or authorized distributors?
All RS1GLW 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 RS1GLW meets industry standards.
7.What is the process for return or replacement of RS1GLW?
All RS1GLW units undergo pre-shipment inspection (PSI). If there is an issue with RS1GLW, 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 RS1GLW part is unused and in its original packaging.
Return procedure for RS1GLW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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