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Taiwan Semiconductor Corporation RS3MFS
- Part No.:
- RS3MFS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
RS3MFS.pdf
- Description:
- 160NS, 3A, 1000V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:13,835
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Product details
Overview
RS3MFS from Taiwan Semiconductor is a 3A, 1000V fast recovery surface-mount rectifier in SOD-128 package, featuring 160 ns reverse recovery time, 1.30 V max forward voltage at 3A/25°C, and -55°C to +175°C junction temperature range; used in DC-DC converters and switching-mode inverters for high-efficiency power conversion.
For engineers reviewing the RS3MFS datasheet, RS3MFS pinout, RS3MFS application, or RS3MFS equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), surge current rating (80 A), thermal resistance (RθJL = 23 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance.
Technical Context
The RS3MFS is a single-die, glass-passivated fast recovery rectifier optimized for high-frequency switching applications. Its 160 ns trr and low junction capacitance (15 pF) enable reduced switching losses in SMPS topologies operating up to several hundred kHz.
Thermal performance is defined with mounting on a 5 mm × 5 mm copper pad: RθJA = 88 °C/W (ambient), RθJC = 24 °C/W (case), and RθJL = 23 °C/W (lead), supporting continuous 3 A conduction at elevated ambient temperatures when properly heatsinked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands repetitive reverse voltages up to 1000 V without breakdown, suitable for 800 V DC bus designs with margin. |
| IF | 3 A - Continuous average forward current rating at TA = 25°C on standard PCB pad. |
| IFSM | 80 A - Peak non-repetitive surge current handling capability for transient overload protection. |
| trr | 160 ns - Fast reverse recovery minimizes switching loss and EMI in high-frequency converters. |
| VF @ 3A/25°C | 1.30 V max - Low forward drop reduces conduction loss and improves system efficiency at rated load. |
| RθJL | 23 °C/W - Junction-to-lead thermal resistance enables direct thermal path to PCB copper for passive cooling. |
| TJ Range | -55°C to +175°C - Wide operating junction temperature supports industrial and automotive under-hood environments. |
Pinout & Package
Package: SOD-128 surface-mount plastic package per JEDEC DO-221AD; cathode indicated by band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input terminal | Connected to lower-potential side of circuit; accepts up to 3 A continuous forward current. |
| Cathode | Forward current output / reverse blocking terminal | Marked by band; blocks up to 1000 V reverse voltage; carries full forward current to load or next stage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance in harsh environments without hermetic sealing. |
| MSL Level 1 | Zero floor life limitation - can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. |
| UL 94V-0 molding compound | Self-extinguishing plastic housing meets fire-safety requirements for enclosed power supplies. |
| RoHS & halogen-free | Complies with EU RoHS Directive 2011/65/EU and IEC 61249-2-21 for environmentally constrained markets. |
Applications
| DC–DC Converters | Switching Inverters |
|---|---|
Use Scenario: Isolated flyback or forward converter output rectification in telecom and server PSUs. IC Role / Device Role / Timing Role: Output-stage unidirectional power switch converting high-frequency AC from transformer secondary to regulated DC. Use Value: 160 ns trr and low CJ (15 pF) reduce switching loss and ringing, improving efficiency above 100 kHz. | Use Scenario: DC link to AC output stage in solar microinverters and UPS systems. IC Role / Device Role / Timing Role: High-voltage freewheeling or output rectification in H-bridge or half-bridge topologies. Use Value: 1000 V VRRM supports 600–800 V DC bus operation with safety margin; 80 A IFSM handles motor startup surges. |
| Industrial SMPS | AC-DC Adapters |
Use Scenario: Primary-side snubber or secondary-side rectification in ruggedized industrial power modules. IC Role / Device Role / Timing Role: Fast-recovery clamp diode or output rectifier in high-reliability 24/48 V systems. Use Value: -55°C to +175°C TJ range and MSL 1 enable use in sealed enclosures without derating or baking. | Use Scenario: Secondary-side rectification in compact wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Surface-mount replacement for axial-leaded rectifiers in space-constrained designs. Use Value: SOD-128 footprint offers 50% smaller board area than DO-214AC while maintaining 3 A/1000 V ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | 600 V VRRM, 3 A, 75 ns trr, TO-277 package | Lower voltage rating limits use to ≤400 V DC bus; faster recovery suits higher-frequency designs. | Select when system VRRM requirement is ≤600 V and trr < 100 ns is critical. |
| ES3J | 600 V VRRM, 3 A, 35 ns trr, SMA package | Substantially faster recovery but half the voltage rating; smaller SMA footprint increases thermal resistance. | Prefer for low-voltage, ultra-high-frequency flybacks where 1000 V margin is unnecessary. |
Compared with STTH3L06S and ES3J, the RS3MFS provides superior 1000 V blocking capability and SOD-128 thermal performance (RθJL = 23 °C/W), making it optimal for 800 V-class industrial and renewable energy converters where voltage margin and thermal robustness outweigh ultra-fast recovery needs.
Availability
RS3MFS is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial SMPS requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for RS3MFS 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 power, automotive, and industrial markets since 1979.
The RS3MFS belongs to TSC's high-voltage fast recovery rectifier product line, engineered specifically for high-efficiency, high-reliability switching power supplies operating at elevated temperatures and voltage stress.
FAQ
What is the maximum junction temperature rating for RS3MFS?
The RS3MFS has a maximum junction temperature (TJ) rating of +175°C and a minimum of -55°C. This wide operating range allows deployment in demanding environments such as industrial motor drives and automotive under-hood power modules. The RS3MFS maintains specified electrical performance across this full range, with forward voltage decreasing and reverse leakage increasing predictably per datasheet curves.
Is RS3MFS suitable for reflow soldering without pre-baking?
Yes, RS3MFS is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to standard lead-free reflow. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during assembly - a key advantage over MSL 3+ rectifiers like many DO-214AA devices.
What is the reverse recovery time (trr) of RS3MFS and how is it measured?
The RS3MFS reverse recovery time is 160 ns maximum, tested under conditions of IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, and TJ = 25°C. This value reflects its fast recovery behavior in hard-switched topologies. The RS3MFS achieves this via optimized lifetime control in the silicon die, balancing speed against reverse recovery charge and leakage.
Does RS3MFS have a halogen-free and RoHS-compliant construction?
Yes, RS3MFS is both RoHS-compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and terminals are matte tin-plated to ensure solderability and whisker resistance. These attributes make RS3MFS suitable for export to regulated markets including the EU, Japan, and South Korea.
What is the thermal resistance from junction to lead (RθJL) for RS3MFS?
The junction-to-lead thermal resistance (RθJL) of RS3MFS is 23 °C/W, measured with the device mounted on a 5 mm × 5 mm copper pad per JEDEC standards. This low value enables efficient heat transfer from the die directly into the PCB copper, supporting sustained 3 A operation without external heatsinking in well-designed layouts.
RS3MFS 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):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 160 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS3MFS FAQ
1.How can I place an order for RS3MFS through Aetrix?
Please submit a Request for Quotation (RFQ) for RS3MFS 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 RS3MFS reliable?
The price and inventory of RS3MFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS3MFS is usually 5 days.
3.What payment methods are accepted for RS3MFS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS3MFS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS3MFS?
RS3MFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS3MFS 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 RS3MFS?
For technical support, including RS3MFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS3MFS requirements.
6.How does Aetrix verify that RS3MFS is sourced from the original manufacturer or authorized distributors?
All RS3MFS 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 RS3MFS meets industry standards.
7.What is the process for return or replacement of RS3MFS?
All RS3MFS units undergo pre-shipment inspection (PSI). If there is an issue with RS3MFS, 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 RS3MFS part is unused and in its original packaging.
Return procedure for RS3MFS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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