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Taiwan Semiconductor Corporation RS1MFSH
- Part No.:
- RS1MFSH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
RS1MFSH.pdf
- Description:
- DIODE GEN PURP 1KV 1A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:21,100
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Product details
Overview
RS1MFSH from Taiwan Semiconductor is a 1000 V, 1 A fast recovery surface-mount rectifier in SOD-128 package, featuring 500 ns reverse recovery time, 1.20 V max forward voltage at 1.0 A/125°C, and AEC-Q101 qualification for automotive-grade reliability in DC/DC converters and snubber circuits.
For engineers reviewing the RS1MFSH datasheet, RS1MFSH pinout, RS1MFSH application, or RS1MFSH equivalent, key selection criteria include its 1000 V repetitive peak reverse voltage, 30 A surge rating, 175°C maximum junction temperature, low-profile SOD-128 thermal performance (RθJL = 29°C/W), and AEC-Q101 qualification for under-hood automotive use.
Technical Context
The RS1MFSH implements a single-die, glass-passivated PN junction optimized for fast switching in high-voltage DC/DC conversion stages. Its 500 ns reverse recovery time and 7 pF junction capacitance support efficient operation in 100–500 kHz power topologies while maintaining low conduction loss.
Thermally, it delivers RθJL = 29°C/W and RθJA = 84°C/W on a 5 mm × 5 mm Cu pad, enabling sustained 1 A average forward current up to 125°C ambient when properly mounted-critical for space-constrained automotive power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input stages in 400–800 V DC bus systems without derating |
| IF | 1 A continuous - rated for steady-state output rectification in sub-10 W isolated converters |
| trr | 500 ns - enables stable operation in 200–500 kHz flyback and forward converters |
| VF max | 1.20 V @ 1.0 A / 125°C - limits conduction loss to ≤1.2 W at full load and elevated temperature |
| RθJL | 29 °C/W - allows direct thermal coupling to PCB copper, reducing need for external heatsinking |
| IFSM | 30 A - withstands inrush and transient surges common in automotive 12 V/24 V battery-fed systems |
| Junction temp | −55°C to +175°C - meets extended temperature requirements for engine control and ADAS modules |
Pinout & Package
Package: SOD-128 - low-profile, surface-mount plastic package with matte tin-plated leads, J-STD-002 solderable, moisture sensitivity level 1, UL 94V-0 rated molding compound, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to unregulated DC source or transformer secondary; must handle full surge current |
| Cathode | Output current exit point | Feeds filter capacitor or load; polarity band ensures correct orientation during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, HTRB, and UHAST |
| Glass passivated junction | Enhances long-term reliability in humid or chemically aggressive under-hood environments |
| Low profile SOD-128 | Height ≤ 1.2 mm enables integration into ultra-thin power modules and compact ECU designs |
| Junction capacitance 7 pF | Minimizes switching noise and EMI in high-frequency SMPS, easing EMC compliance |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing cost and process complexity |
Applications
| Automotive DC/DC Converters | Industrial Snubber Circuits |
|---|---|
Use Scenario: Step-down conversion from 48 V or 60 V battery rails to 5 V/3.3 V logic supplies in ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: 1000 V VRRM provides 2× safety margin over 48 V system transients; 500 ns trr prevents cross-conduction losses. | Use Scenario: Voltage spike suppression across IGBTs in motor drives operating up to 600 V DC bus. IC Role / Device Role / Timing Role: Fast-recovery clamp diode in RC snubber network. Use Value: 30 A IFSM handles IGBT turn-off energy; 7 pF CJ minimizes snubber capacitive loading. |
| Freewheeling in Automotive Actuators | High-Voltage AC-DC Front Ends |
Use Scenario: Inductive kickback protection for solenoid drivers in transmission control units. IC Role / Device Role / Timing Role: Freewheeling path for coil current decay during PWM deactivation. Use Value: 175°C TJMAX sustains operation near hot engine components; glass passivation resists under-hood condensation. | Use Scenario: Bridge rectification in industrial 380 V AC input power supplies feeding 400 V DC link. IC Role / Device Role / Timing Role: Single-phase bridge leg component in compact, fanless PSU designs. Use Value: 1000 V VRRM accommodates line surges up to 1.5 kV; SOD-128 footprint reduces board area vs. DO-214AA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-1EWH01-M3/45 | Same SOD-128 package, 1000 V VRRM, but trr = 35 ns (faster), VF = 1.35 V @ 1 A (higher) | Better for >1 MHz resonant converters; higher VF increases conduction loss in 100–300 kHz designs | Prefer RS1MFSH where thermal budget is tight and 500 ns trr suffices |
| ON Semiconductor MUR110SFT1G | SOD-123FL package, 1000 V VRRM, trr = 75 ns, RθJA = 150°C/W (worse thermal) | Smaller footprint but limited to <0.5 A continuous due to thermal constraints | Choose RS1MFSH when 1 A continuous current and PCB-level heat spreading are required |
Compared with VS-1EWH01-M3/45 and MUR110SFT1G, RS1MFSH offers superior thermal resistance (RθJL = 29°C/W) and AEC-Q101 qualification-making it the preferred choice for automotive 1 A rectification where reliability and thermal management outweigh ultra-fast switching needs.
Availability
RS1MFSH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and freewheeling applications requiring stable component supply, AEC-Q101 compliance, and consistent SOD-128 packaging.
Supply support for RS1MFSH 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 diodes, and MOSFETs for industrial and automotive markets.
The RS1MFSH belongs to TSC's RS1xFSH fast recovery rectifier family, designed specifically for high-reliability, high-voltage rectification in space-constrained automotive power systems where AEC-Q101 qualification and thermal robustness are mandatory.
FAQ
What is the maximum junction temperature rating for RS1MFSH?
The RS1MFSH has a maximum junction temperature (TJMAX) of +175°C, validated per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments and high-ambient industrial settings when mounted on appropriate PCB copper area. The RS1MFSH maintains specified electrical parameters up to this temperature limit.
Is RS1MFSH pin-compatible with other parts in the RS1xFSH series?
Yes, all RS1xFSH variants-including RS1DFSH, RS1GFSH, RS1JFSH, RS1KFSH, and RS1MFSH-share identical SOD-128 package dimensions, pinout, and thermal pad layout. The only difference is rated VRRM (200 V to 1000 V), allowing design reuse across voltage grades without PCB revision. RS1MFSH uses the same anode/cathode terminal configuration as the rest of the series.
Does RS1MFSH meet RoHS and halogen-free requirements?
Yes, RS1MFSH is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and terminals are matte tin-plated per J-STD-002. These compliance attributes are confirmed in Taiwan Semiconductor's official product change notices and material declarations for version B2304.
What is the reverse recovery time (trr) specification for RS1MFSH?
The RS1MFSH has a reverse recovery time (trr) of 500 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the Electrical Specifications table of the B2304 datasheet and applies specifically to RS1MFSH-not lower-voltage variants like RS1JFSH (250 ns) or RS1GFSH (150 ns).
Can RS1MFSH be used in surface-mount reflow processes without baking?
Yes, RS1MFSH has moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into standard lead-free reflow profiles without pre-bake. This eliminates moisture-related popcorning risk and simplifies manufacturing for high-volume automotive assembly lines using the RS1MFSH.
RS1MFSH 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:
- 1.3 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 7pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1MFSH FAQ
1.How can I place an order for RS1MFSH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MFSH 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 RS1MFSH reliable?
The price and inventory of RS1MFSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MFSH is usually 5 days.
3.What payment methods are accepted for RS1MFSH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MFSH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MFSH?
RS1MFSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MFSH 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 RS1MFSH?
For technical support, including RS1MFSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MFSH requirements.
6.How does Aetrix verify that RS1MFSH is sourced from the original manufacturer or authorized distributors?
All RS1MFSH 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 RS1MFSH meets industry standards.
7.What is the process for return or replacement of RS1MFSH?
All RS1MFSH units undergo pre-shipment inspection (PSI). If there is an issue with RS1MFSH, 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 RS1MFSH part is unused and in its original packaging.
Return procedure for RS1MFSH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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