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Taiwan Semiconductor Corporation S1MFS MWG
- Part No.:
- S1MFS MWG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
S1MFS MWG.pdf
- Description:
- DIODE GEN PURP 1KV 1A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:155
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Product details
Overview
S1MFS MWG from Taiwan Semiconductor is a 1 A, 1000 V standard surface-mount silicon rectifier diode in SOD-128 package, featuring glass-passivated junction, 30 A surge rating, and 1.1 V max forward voltage at 1.0 A/25°C, used in DC-DC converters and switching-mode inverters.
For engineers reviewing the S1MFS MWG datasheet, S1MFS MWG pinout, S1MFS MWG application, or S1MFS MWG equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), forward current rating (1 A), thermal resistance (RθJL = 29 °C/W), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance.
Technical Context
The S1MFS MWG is a single-die, unidirectional standard recovery rectifier optimized for high-voltage switching power supplies. Its glass-passivated junction ensures stable reverse leakage (<1 µA @ 25°C, <50 µA @ 125°C) and robust surge tolerance (30 A IFSM, 8.3 ms half-sine).
Thermal performance is defined with PCB mounting on 5 mm × 5 mm copper pads: RθJA = 82 °C/W, RθJC = 30 °C/W, enabling reliable operation up to TJ = 150 °C in compact SOD-128 footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input stages in 800 V AC line-derived SMPS and industrial DC bus rectification |
| IF | 1 A continuous - suitable for low-to-medium power auxiliary rails and bias supplies |
| IFSM | 30 A (8.3 ms) - withstands startup surges and transient overloads without failure |
| VF max | 1.1 V @ 1.0 A / 25°C - limits conduction loss to ≤1.1 W at full rated current |
| TJ max | 150 °C - enables operation in thermally constrained environments including sealed enclosures |
| RθJL | 29 °C/W - allows direct thermal coupling to PCB copper for passive cooling without heatsink |
| CJ | 9 pF @ 4 V - minimizes high-frequency switching noise and EMI in >100 kHz converters |
Pinout & Package
Package: SOD-128 - surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity indicated by cathode band, weight ≈ 0.027 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Current exit point during forward conduction; marked with band | Connected to output rail or filter capacitor positive terminal; defines output polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of reverse leakage and breakdown voltage under humidity and thermal cycling |
| J-STD-020 Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT reflow profiles |
| RoHS and halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for industrial and consumer end equipment |
| Single-die configuration in SOD-128 | Provides higher power density vs. SOD-123/SMA packages while maintaining automated assembly compatibility |
Applications
| DC-DC Converter Secondary Rectification | Switching Mode Inverter Input Stage |
|---|---|
Use Scenario: High-efficiency isolated flyback or forward converter delivering 5–24 V output from 300–800 V DC bus. IC Role / Device Role / Timing Role: Output rectifier conducting unidirectionally during transformer reset phase; handles continuous 1 A load with minimal conduction loss. Use Value: 1.1 V VF max limits power dissipation to ≤1.1 W, reducing thermal stress on adjacent ICs and PCB layout area. | Use Scenario: Front-end AC/DC stage of motor drive inverter converting 400–690 V AC line to intermediate DC link. IC Role / Device Role / Timing Role: Standard recovery rectifier in voltage-doubler or full-wave bridge configuration feeding bulk storage capacitors. Use Value: 1000 V VRRM provides 2× safety margin over 690 V AC RMS, ensuring reliability under line transients and harmonics. |
| Industrial Power Supply Bias Rail | LED Driver Auxiliary Supply |
Use Scenario: Low-power auxiliary supply powering control logic, gate drivers, and sensing circuitry in PLC or HMI power modules. IC Role / Device Role / Timing Role: Primary rectifier feeding linear regulator or buck converter input; operates continuously at partial load. Use Value: RθJL = 29 °C/W enables self-cooling on standard FR4 PCB, eliminating need for thermal vias or external heatsinking. | Use Scenario: Off-line LED driver with integrated PFC stage supplying isolated feedback and bias for controller IC. IC Role / Device Role / Timing Role: Standby rectifier energizing startup circuit before main PWM controller activates. Use Value: <1 µA reverse leakage at 25°C prevents standby current drain, supporting <100 mW no-load consumption targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06S | 1 A, 600 V VRRM; faster recovery (trr = 75 ns); higher VF (1.3 V typ) | Limited to ≤600 V systems; better suited for high-frequency quasi-resonant topologies | Select when operating frequency exceeds 200 kHz and system VRRM requirement is ≤600 V |
| ES1J | 1 A, 600 V VRRM; SOD-123 package; lower RθJA (100 °C/W) | Lower power density; not rated for 1000 V line-derived inputs | Choose for space-constrained designs where 600 V rating suffices and SOD-123 footprint is preferred |
Compared with STTH1R06S and ES1J, the S1MFS MWG uniquely delivers 1000 V blocking capability in SOD-128 with industry-leading thermal resistance (29 °C/W), making it optimal for high-voltage industrial power supplies where both voltage margin and thermal headroom are critical.
Availability
S1MFS MWG is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and industrial auxiliary power supplies requiring stable component supply, long-lifecycle support, and J-STD-020 Level 1 SMT compatibility.
Supply support for S1MFS MWG 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 devices, and MOSFETs for industrial and automotive markets.
The S1DFS–S1MFS family was designed specifically for high-reliability, high-voltage surface-mount rectification in industrial power conversion, emphasizing thermal robustness, moisture resilience, and long-term parametric stability.
FAQ
What is the maximum repetitive peak reverse voltage rating for the S1MFS MWG?
The S1MFS MWG has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, verified per Taiwan Semiconductor's C2103 datasheet. This rating applies across the full operating temperature range (−55°C to +150°C) and defines the highest reverse voltage the device can block repeatedly without breakdown. It is the highest voltage grade in the S1DFS–S1MFS series.
Does the S1MFS MWG have a specified forward voltage at elevated junction temperature?
Yes, the S1MFS MWG specifies forward voltage at 125°C: 0.85 V (typical) and 0.95 V (maximum) at 1.0 A. This data confirms reduced conduction loss at high ambient temperatures, supporting stable operation in enclosed or high-temperature industrial environments where the S1MFS MWG is commonly deployed.
Is the S1MFS MWG compliant with RoHS and halogen-free standards?
Yes, the S1MFS MWG is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance statements are explicitly confirmed in the "Features" section of the official Taiwan Semiconductor datasheet (Version C2103), and apply to the entire S1DFS–S1MFS family including the S1MFS MWG variant.
What is the moisture sensitivity level (MSL) of the S1MFS MWG, and how does it affect assembly?
The S1MFS MWG has a moisture sensitivity level of J-STD-020 Level 1, meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without pre-baking. This eliminates process steps and risk of popcorning, simplifying manufacturing for high-volume SMT lines handling the S1MFS MWG.
How does the thermal resistance of the S1MFS MWG compare to similar SOD-123 rectifiers?
The S1MFS MWG has RθJL = 29 °C/W, significantly lower than typical SOD-123 rectifiers (~50–60 °C/W). This results from its larger SOD-128 copper leadframe and optimized internal construction, allowing the S1MFS MWG to dissipate heat more effectively on standard PCBs without additional thermal relief.
S1MFS MWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-128
- 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:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1000 V
- Capacitance @ Vr, F:
- 9pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1MFS MWG FAQ
1.How can I place an order for S1MFS MWG through Aetrix?
Please submit a Request for Quotation (RFQ) for S1MFS MWG 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 S1MFS MWG reliable?
The price and inventory of S1MFS MWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MFS MWG is usually 5 days.
3.What payment methods are accepted for S1MFS MWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MFS MWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1MFS MWG?
S1MFS MWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1MFS MWG 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 S1MFS MWG?
For technical support, including S1MFS MWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MFS MWG requirements.
6.How does Aetrix verify that S1MFS MWG is sourced from the original manufacturer or authorized distributors?
All S1MFS MWG 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 S1MFS MWG meets industry standards.
7.What is the process for return or replacement of S1MFS MWG?
All S1MFS MWG units undergo pre-shipment inspection (PSI). If there is an issue with S1MFS MWG, 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 S1MFS MWG part is unused and in its original packaging.
Return procedure for S1MFS MWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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