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Taiwan Semiconductor Corporation S15MLW
- Part No.:
- S15MLW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
S15MLW.pdf
- Description:
- 1.5A, 1000V, STANDARD RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
S15MLW from Taiwan Semiconductor is a 1000V repetitive peak reverse voltage, 1.5A standard surface-mount silicon rectifier diode in SOD-123W package, with 50A surge capability and 175°C max junction temperature, used in DC-DC converters and switching-mode inverters.
For engineers reviewing the S15MLW datasheet, S15MLW pinout, S15MLW application, or S15MLW equivalent, key selection criteria include VRRM=1000V, IFSM=50A, VF≤1.10V at 1.5A/25°C, RθJA=85°C/W, and SOD-123W footprint compatibility with automated placement.
Technical Context
The S15MLW is a single-die, standard (non-fast, non-soft-recovery) PN-junction rectifier optimized for general-purpose AC/DC and DC/DC conversion where high VRRM and robust surge handling are required. It exhibits typical forward voltage of 0.98V (max 1.10V) at 1.5A/25°C and reverse leakage ≤1µA at 25°C.
Thermal performance is characterized with RθJL=29°C/W and RθJA=85°C/W on a 5mm×5mm Cu pad PCB. Its SOD-123W package supports moisture sensitivity level 1 (J-STD-020) and meets UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Maximum repetitive reverse blocking voltage; defines maximum AC input or DC bus voltage it can safely withstand. |
| IF | 1.5 A - Continuous average forward current rating; determines steady-state power dissipation capability. |
| IFSM | 50 A - Peak non-repetitive surge current (8.3 ms half-sine); enables survival during line transients or startup inrush. |
| VF @ 1.5A/25°C | ≤1.10 V - Forward voltage drop at rated current; directly impacts conduction loss and thermal design. |
| TJ max | +175 °C - Maximum allowable junction temperature; sets upper limit for thermal management margin. |
| RθJA | 85 °C/W - Junction-to-ambient thermal resistance on standard test board; used to calculate temperature rise under load. |
Pinout & Package
Package: SOD-123W - Surface-mount plastic package with matte tin-plated leads, polarity indicated by cathode band, weight ≈0.019g, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; must be routed with adequate copper area for thermal relief. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; connects to higher-potential node; critical for correct orientation in bridge or flyback configurations. |
Key Features
| Feature | Design Value |
|---|---|
| High surge current capability (IFSM = 50 A) | Enables reliable operation during short-duration overloads without bond-wire fusing or junction failure. |
| Low forward voltage (VF ≤ 1.10 V @ 1.5A) | Reduces conduction losses and improves system efficiency in medium-current rectification stages. |
| SOD-123W compact footprint | Supports high-density PCB layouts and compatibility with standard pick-and-place equipment for automated assembly. |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates need for dry-packaging or baking prior to reflow, reducing manufacturing overhead and handling risk. |
Applications
| DC-DC Converter Rectification | Switching Inverter Output Stage |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at up to 1.5 A. IC Role / Device Role / Timing Role: Unidirectional current steering device converting transformer secondary AC to regulated DC output. Use Value: 1000 V VRRM provides ample margin against reflected voltage spikes in discontinuous conduction mode (DCM) operation. | Use Scenario: Freewheeling or output rectification in 400 V DC bus inverters for motor drives or UPS systems. IC Role / Device Role / Timing Role: Standard recovery rectifier handling bidirectional energy flow during switching transitions. Use Value: 50 A IFSM withstands brief current surges during motor stall or fault conditions without degradation. |
| AC-DC Input Bridge Leg | General-Purpose Industrial Power Supply |
Use Scenario: One leg of a full-wave bridge rectifier in universal-input (85–265 VAC) offline SMPS front-end. IC Role / Device Role / Timing Role: Half-wave rectifying element subjected to peak line voltage plus safety margin. Use Value: 1000 V VRRM exceeds worst-case peak reverse voltage (≈375 V) with >2.6× safety factor. | Use Scenario: Output rectification in industrial 24 V/48 V power supplies requiring long-term reliability and wide ambient temperature range. IC Role / Device Role / Timing Role: Primary unidirectional power conversion component operating continuously at elevated ambient temperatures. Use Value: +175°C TJ max enables stable operation in sealed enclosures or high-temperature environments without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | VRRM = 600 V, IF = 1.0 A, VF ≈ 1.15 V @ 1.0 A - lower voltage rating and current capacity | Not suitable for 1000 V bus or 1.5 A continuous loads; limited to ≤600 V designs | Select only if system VRRM requirement is ≤600 V and thermal budget allows higher VF. |
| ON Semi MUR160 | VRRM = 600 V, IF = 1.0 A, fast recovery (trr ≈ 50 ns) - faster but lower voltage/current and different recovery behavior | Designed for high-frequency switching; not optimized for low-loss 50/60 Hz or low-kHz rectification | Prefer for high-frequency PFC or resonant topologies; avoid where soft recovery or low VF is prioritized. |
Compared with STTH1L06S and MUR160, the S15MLW delivers higher voltage blocking (1000 V), higher continuous current (1.5 A), and lower forward voltage at rated current-making it uniquely suited for rugged, medium-power industrial rectification where reliability and conduction efficiency are critical.
Availability
S15MLW is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and industrial power supplies requiring stable component supply and long-lifecycle support.
Supply support for S15MLW 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 devices, rectifiers, TVS diodes, and MOSFETs.
The S15MLW belongs to TSC's S15xLW standard rectifier family, designed specifically for cost-sensitive, high-reliability AC/DC and DC/DC power conversion in industrial, computing, and consumer applications.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the S15MLW?
The S15MLW has a VRRM rating of 1000 V, meaning it can reliably block reverse voltages up to this value under repetitive conditions. This specification is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103), and ensures safe operation in high-voltage DC bus or universal-input AC-DC applications where transient overvoltage margins are critical. The S15MLW maintains this rating across its full operating temperature range.
What is the forward voltage drop (VF) of the S15MLW at 1.5 A and 25°C?
The S15MLW exhibits a maximum forward voltage drop of 1.10 V at 1.5 A and 25°C, with a typical value of 0.98 V. This parameter is specified in the Electrical Specifications table under "Forward voltage" with conditions IF = 1.5A, TJ = 25°C. The low VF contributes directly to reduced conduction losses and improved thermal performance in power supply designs using the S15MLW.
Is the S15MLW RoHS compliant and halogen-free?
Yes, the S15MLW is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. These compliance attributes are verified for the SOD-123W package variant and apply to all units shipped under ordering code S15MLW. No exemptions or exceptions are noted in the official documentation.
What is the thermal resistance from junction to ambient (RθJA) for the S15MLW?
The S15MLW has a junction-to-ambient thermal resistance (RθJA) of 85°C/W when mounted on a standard 5 mm × 5 mm copper pad test board, as published in the Thermal Performance section of the datasheet. This value is essential for calculating expected junction temperature rise under real-world load conditions and must be used with actual power dissipation to ensure operation remains within the +175°C TJ max limit.
Does the S15MLW have a moisture sensitivity level (MSL) rating, and what is it?
The S15MLW carries a moisture sensitivity level (MSL) rating of Level 1 per J-STD-020, as documented in the FEATURES section. This means the device may be stored indefinitely at ambient conditions without requiring dry-packaging or baking before surface-mount reflow. Level 1 eliminates moisture-related popcorning risks and simplifies manufacturing logistics for high-volume SMT assembly of the S15MLW.
S15MLW 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):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1.5 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 175°C
S15MLW FAQ
1.How can I place an order for S15MLW through Aetrix?
Please submit a Request for Quotation (RFQ) for S15MLW 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 S15MLW reliable?
The price and inventory of S15MLW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S15MLW is usually 5 days.
3.What payment methods are accepted for S15MLW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S15MLW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S15MLW?
S15MLW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S15MLW 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 S15MLW?
For technical support, including S15MLW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S15MLW requirements.
6.How does Aetrix verify that S15MLW is sourced from the original manufacturer or authorized distributors?
All S15MLW 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 S15MLW meets industry standards.
7.What is the process for return or replacement of S15MLW?
All S15MLW units undergo pre-shipment inspection (PSI). If there is an issue with S15MLW, 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 S15MLW part is unused and in its original packaging.
Return procedure for S15MLW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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