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Taiwan Semiconductor Corporation RS1MLWH
- Part No.:
- RS1MLWH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
RS1MLWH.pdf
- Description:
- DIODE GEN PURP 1KV 1A SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:52,615
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Product details
Overview
RS1MLWH from Taiwan Semiconductor is a 1 A, 1000 V fast recovery surface-mount rectifier in SOD-123W package, featuring 250 ns reverse recovery time, 1.3 V max forward voltage at 1 A, and AEC-Q101 qualification for automotive-grade reliability. It serves as a primary AC/DC or DC/DC output rectifier in high-voltage power supplies.
For engineers reviewing the RS1MLWH datasheet, RS1MLWH pinout, RS1MLWH application, or RS1MLWH equivalent, key selection criteria include peak reverse voltage rating (1000 V), thermal resistance (RθJL = 25 °C/W), junction temperature range (–55 to +175 °C), and SOD-123W mechanical compatibility with automated placement systems.
Technical Context
The RS1MLWH implements a single-die, glass-passivated PN junction optimized for fast recovery (250 ns) under 0.5 A forward / 1.0 A reverse switching conditions. Its 1000 V VRRM and 30 A IFSM support robust surge handling in transient-prone automotive and industrial environments.
Thermally, it delivers RθJL = 25 °C/W and RθJA = 80 °C/W in SOD-123W, enabling 1 A continuous operation up to +125 °C ambient when mounted on standard PCB copper area, with derating to zero at +175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input rectification in 800 VAC line-derived or high-voltage DC bus applications |
| IF | 1 A continuous - suitable for low-to-medium power SMPS outputs up to ~12 W at 12 V |
| trr | 250 ns - enables efficient operation in 100–500 kHz switching converters with reduced switching loss |
| VF max | 1.3 V @ 1 A, 25°C - limits conduction loss to ≤1.3 W at full load, easing thermal design |
| IR | 5 µA @ 25°C, 150 µA @ 125°C - ensures minimal leakage in high-impedance snubber or hold-up circuits |
| RθJL | 25 °C/W - allows direct heat transfer to PCB copper, supporting compact layout without heatsink |
Pinout & Package
Package: SOD-123W - low-profile, surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band polarity marking. Weight: 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail; cathode band identifies this terminal visually and on PCB silkscreen |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports under-hood and lighting modules |
| Glass passivated junction | Enhances moisture resistance and long-term reliability in humid or thermally cycled environments |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking - reduces manufacturing overhead and risk of popcorning |
| Low profile SOD-123W | 0.9 mm max height - fits space-constrained layouts in LED drivers and automotive ECUs |
Applications
| Automotive LED Headlamp Driver | Industrial DC/DC Converter Output Stage |
|---|---|
Use Scenario: Rectifying high-frequency transformer output in constant-current LED driver for adaptive front lighting systems. IC Role / Device Role / Timing Role: Primary output rectifier handling 1 A pulsed current at up to 300 kHz switching frequency. Use Value: 250 ns trr minimizes reverse recovery loss, while 1000 V VRRM accommodates reflected transients from inductive loads. | Use Scenario: Secondary-side rectification in isolated 24 V input to 5 V/1 A industrial DC/DC module. IC Role / Device Role / Timing Role: Unidirectional current path with low conduction loss and stable leakage across –40 to +85 °C ambient. Use Value: 1.3 V VF max ensures ≤1.3 W dissipation at full load, compatible with natural convection cooling on 1 oz copper. |
| Snubber Network in Motor Drive Inverter | General-Purpose High-Voltage AC Adapter |
Use Scenario: Clamping voltage spikes across IGBT gate drivers or freewheeling paths in 3-phase BLDC inverters. IC Role / Device Role / Timing Role: Fast-recovery diode in RC snubber circuit absorbing turn-off energy. Use Value: 250 ns trr and 30 A IFSM enable reliable clamping of sub-microsecond transients without oscillation or latch-up. | Use Scenario: Bridge rectifier replacement in universal-input (90–264 VAC) wall adapters targeting 12 V/0.8 A output. IC Role / Device Role / Timing Role: Single-diode half-wave or full-wave rectifier in compact, cost-sensitive consumer power supplies. Use Value: SOD-123W footprint and AEC-Q101 qualification provide supply chain robustness and drop-in manufacturability versus generic alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06S | Same 1 A / 600 V rating; trr = 150 ns; TO-277 package (larger, higher RθJA) | Lower VRRM limits use to ≤600 V circuits; requires PCB redesign due to different footprint | Select only if 600 V rating suffices and thermal margin permits higher RθJA |
| ON Semi MUR110ES | 1 A / 1000 V; trr = 35 ns; DO-41 through-hole package | Superior speed but incompatible with SMT automation; no AEC-Q101 qualification | Prefer RS1MLWH for automotive SMT production; choose MUR110ES only for prototyping or legacy through-hole designs |
Compared with STTH1R06S and MUR110ES, the RS1MLWH uniquely combines 1000 V rating, AEC-Q101 qualification, SOD-123W SMT compatibility, and 250 ns recovery-making it optimal for volume automotive and industrial surface-mount power conversion where reliability, footprint, and voltage margin are jointly critical.
Availability
RS1MLWH is available at Aetrix Electronics and suitable for automotive LED lighting, industrial DC/DC converters, and high-voltage snubber networks requiring stable component supply and AEC-Q101 compliance.
Supply support for RS1MLWH 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 automotive, industrial, and consumer markets since 1979.
The RS1MLWH belongs to TSC's RS1xLWH fast recovery rectifier family, engineered specifically for high-reliability, high-voltage surface-mount power conversion in automotive lighting and industrial power supplies.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the RS1MLWH?
The RS1MLWH has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version A2103). This rating defines its capability to block reverse voltage in applications such as high-line AC/DC inputs or inductive flyback circuits without breakdown. The RS1MLWH is the highest-voltage variant in the RS1xLWH series, distinct from RS1DLWH (200 V) and RS1KLWH (800 V).
Is the RS1MLWH qualified for automotive applications?
Yes, the RS1MLWH is explicitly AEC-Q101 qualified per the manufacturer's documentation, confirming its suitability for automotive electronic systems including engine control units, body electronics, and LED lighting modules. This qualification covers stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life - all validated by Taiwan Semiconductor. The RS1MLWH shares this qualification across the RS1xLWH family.
What is the reverse recovery time (trr) of the RS1MLWH and under what conditions is it measured?
The RS1MLWH has a reverse recovery time (trr) of 250 ns, measured under the conditions IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications section of the Taiwan Semiconductor datasheet. This value applies specifically to RS1KLWH and RS1MLWH variants; lower-voltage versions (e.g., RS1DLWH) specify 150 ns. The test uses pulse conditions defined in Note 2 of the datasheet.
What package type does the RS1MLWH use and what are its key mechanical attributes?
The RS1MLWH uses the SOD-123W surface-mount package: a low-profile, molded plastic case with matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band. Its approximate weight is 0.016 g, and it supports automated placement per the manufacturer's mechanical data.
Does the RS1MLWH have RoHS and halogen-free compliance?
Yes, the RS1MLWH is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. These compliance statements apply to the entire RS1xLWH series, including RS1MLWH, and are verified per standard industry testing protocols. No exemptions or exceptions are noted in the official documentation.
RS1MLWH 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):
- 1000 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 @ 1000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 175°C
RS1MLWH FAQ
1.How can I place an order for RS1MLWH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MLWH 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 RS1MLWH reliable?
The price and inventory of RS1MLWH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MLWH is usually 5 days.
3.What payment methods are accepted for RS1MLWH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MLWH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MLWH?
RS1MLWH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MLWH 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 RS1MLWH?
For technical support, including RS1MLWH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MLWH requirements.
6.How does Aetrix verify that RS1MLWH is sourced from the original manufacturer or authorized distributors?
All RS1MLWH 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 RS1MLWH meets industry standards.
7.What is the process for return or replacement of RS1MLWH?
All RS1MLWH units undergo pre-shipment inspection (PSI). If there is an issue with RS1MLWH, 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 RS1MLWH part is unused and in its original packaging.
Return procedure for RS1MLWH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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