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Taiwan Semiconductor Corporation RS1MFL
- Part No.:
- RS1MFL
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
RS1MFL.pdf
- Description:
- 250NS, 1A, 1000V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:8,735
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Product details
Overview
RS1MFL from Taiwan Semiconductor is a 1 A, 1000 V fast recovery surface-mount rectifier in SOD-123FL package, featuring 250 ns reverse recovery time, 1.04 V forward voltage at 1.0 A/25°C, and 150 µA reverse leakage at 125°C - deployed in high-efficiency DC-DC converters and switching inverters.
For engineers reviewing the RS1MFL datasheet, RS1MFL pinout, RS1MFL application, or RS1MFL equivalent, key selection criteria include peak reverse voltage rating, thermal resistance (RθJL = 17 °C/W), junction capacitance (11 pF), and moisture sensitivity level (MSL 1).
Technical Context
The RS1MFL is a single-die, glass-passivated fast recovery rectifier optimized for high-voltage switching applications. Its 1000 V VRRM, 30 A IFSM, and 150 °C maximum junction temperature support robust operation in compact power supplies.
Thermal performance is characterized with RθJA = 84 °C/W on a 5 mm × 5 mm Cu pad PCB, and RθJC = 19 °C/W enables effective heat transfer to the PCB copper. Junction capacitance of 11 pF at 1 MHz/4 V minimizes high-frequency switching losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input stages in 800 V AC line-derived SMPS and industrial HV DC links |
| IF | 1 A continuous - rated for output rectification in sub-15 W isolated flyback or buck-boost converters |
| trr | 250 ns - reduces switching loss and EMI in 100–500 kHz switching topologies |
| VF @ 1 A, 25°C | 1.04 V (typ), 1.30 V (max) - defines conduction loss budget in thermally constrained layouts |
| RθJL | 17 °C/W - enables direct thermal coupling to PCB copper without heatsink in space-limited designs |
| CJ | 11 pF @ 1 MHz, 4 V - limits capacitive turn-on current and improves hard-switching efficiency |
| IR @ 125°C | 150 µA max - ensures low standby leakage in high-temperature ambient environments |
Pinout & Package
SOD-123FL package: low-profile (1.0 mm height), matte tin-plated leads, cathode indicated by band, MSL 1 per J-STD-020, UL 94V-0 molding compound, weight ≈ 0.016 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 filter capacitor or positive rail - polarity critical for correct rectification |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling stress in unsealed industrial enclosures |
| Low profile SOD-123FL | Enables ≤1.0 mm board thickness in ultra-thin power adapters and LED drivers |
| Moisture sensitivity level 1 | Eliminates bake requirement before reflow - supports standard SMT assembly without process modification |
| Halogen-free & RoHS compliant | Meets IPC-1752A material declaration requirements for EU and global environmental compliance |
| 150 °C junction rating | Permits operation in sealed enclosures up to 85 °C ambient with 65 K thermal margin |
Applications
| AC-DC Adapter Output Rectification | Industrial DC-DC Converter Input Stage |
|---|---|
Use Scenario: 12 V/1 A isolated flyback adapter powering IoT gateways in ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 1.04 V VF at 1 A minimizes conduction loss; 250 ns trr suppresses ringing-induced EMI in compact layouts. | Use Scenario: 48 V input to 24 V/1 A isolated half-bridge DC-DC module in factory automation controllers. IC Role / Device Role / Timing Role: Input-side rectifier handling 100–200 kHz switching transients from bridge output. Use Value: 1000 V VRRM provides 2× safety margin over 400 V DC bus; 11 pF CJ reduces capacitive turn-on loss. |
| Solar Microinverter DC Link Clamp | LED Driver Secondary-Side Rectification |
Use Scenario: Bidirectional clamp diode in 600 V DC link of string-level microinverters operating at 50 °C ambient. IC Role / Device Role / Timing Role: Fast-recovery clamp protecting MOSFETs from inductive voltage spikes during switching transitions. Use Value: 30 A IFSM withstands surge events; 150 µA IR at 125 °C ensures low leakage in high-temperature PV environments. | Use Scenario: Secondary-side rectifier in 36 V/0.8 A constant-current LED driver for outdoor signage. IC Role / Device Role / Timing Role: High-efficiency rectifier delivering stable current to LED strings with minimal thermal rise. Use Value: RθJL = 17 °C/W allows direct PCB copper thermal path; MSL 1 simplifies automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | 1 A, 600 V VRRM, 75 ns trr, DO-214AA package | Limited to ≤600 V systems; faster recovery but higher VF (1.3 V typ @ 1 A) | Choose when lower trr is prioritized over voltage rating and board space is not constrained. |
| ES1J | 1 A, 600 V VRRM, 35 ns trr, SMA package, 1.7 V VF @ 1 A | Higher forward drop increases conduction loss; unsuitable for >600 V applications | Select only where ultra-fast recovery dominates system efficiency and voltage derating permits 600 V use. |
Compared with STTH1L06S and ES1J, the RS1MFL uniquely delivers 1000 V capability in SOD-123FL footprint - enabling compact, high-voltage rectification where alternatives require larger packages or voltage compromises.
Availability
RS1MFL is available at Aetrix Electronics and suitable for AC-DC adapters, industrial DC-DC converters, and solar microinverter designs requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for RS1MFL 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 industrial, computing, and consumer markets since 1979.
The RS1MFL belongs to TSC's RS1xFL fast recovery rectifier family, engineered specifically for high-voltage, surface-mount power conversion where compact size, thermal efficiency, and reliability under thermal cycling are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS1MFL?
The RS1MFL has a VRRM of 1000 V, verified per Taiwan Semiconductor's B2103 datasheet. This rating allows safe operation in 800 V DC bus applications with 20% design margin. The RS1MFL is the highest-voltage variant in the RS1xFL series, distinct from RS1JFL (600 V) and RS1KFL (800 V).
Does RS1MFL have a defined reverse recovery time (trr)?
Yes, RS1MFL has a typical reverse recovery time of 250 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and IRR = 0.25 A. This value is confirmed in the Electrical Specifications table of the official datasheet and differentiates RS1MFL from lower-voltage variants like RS1GFL (150 ns).
What package type does RS1MFL use, and what are its mechanical highlights?
RS1MFL uses the SOD-123FL package: low-profile (1.0 mm height), matte tin-plated leads compliant with J-STD-002, UL 94V-0 molding, and MSL 1 per J-STD-020. Its cathode band marking and 0.016 g weight support automated placement and reliable reflow soldering without pre-bake.
Is RS1MFL halogen-free and RoHS compliant?
Yes, RS1MFL is both halogen-free per IEC 61249-2-21 and RoHS compliant, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. These compliance attributes are certified for the SOD-123FL package variant shipped under ordering code RS1MFL.
What is the forward voltage (VF) of RS1MFL at 1.0 A and 25°C?
At IF = 1.0 A and TJ = 25°C, RS1MFL exhibits a typical forward voltage of 1.04 V and a maximum of 1.30 V. This value is measured per pulse test (PW = 0.3 ms) and is higher than RS1JFL (0.97 V typ) due to the higher voltage-rated die construction.
RS1MFL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123F
- 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:
- 11pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123FL
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1MFL FAQ
1.How can I place an order for RS1MFL through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MFL 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 RS1MFL reliable?
The price and inventory of RS1MFL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MFL is usually 5 days.
3.What payment methods are accepted for RS1MFL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MFL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MFL?
RS1MFL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MFL 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 RS1MFL?
For technical support, including RS1MFL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MFL requirements.
6.How does Aetrix verify that RS1MFL is sourced from the original manufacturer or authorized distributors?
All RS1MFL 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 RS1MFL meets industry standards.
7.What is the process for return or replacement of RS1MFL?
All RS1MFL units undergo pre-shipment inspection (PSI). If there is an issue with RS1MFL, 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 RS1MFL part is unused and in its original packaging.
Return procedure for RS1MFL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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