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Taiwan Semiconductor Corporation RSFDLH
- Part No.:
- RSFDLH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
RSFDLH.pdf
- Description:
- 150NS, 0.5A, 200V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:6,395
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Product details
Overview
RSFDLH from Taiwan Semiconductor is a fast recovery surface mount rectifier with 200 V repetitive peak reverse voltage (VRRM), 0.5 A average forward current (IF), and 150 ns reverse recovery time (trr), designed for high-efficiency DC–DC conversion and automotive snubber circuits in compact Sub SMA packages.
For engineers reviewing the RSFDLH datasheet, RSFDLH pinout, RSFDLH application, or RSFDLH equivalent, key selection criteria include its AEC-Q101 qualification, glass-passivated junction, J-STD-020 Level 1 moisture sensitivity, 150°C maximum junction temperature, and compatibility with automated SMT placement in space-constrained automotive and industrial power supplies.
Technical Context
The RSFDLH is a single-die, unidirectional fast recovery rectifier optimized for high-frequency switching applications. Its 150 ns trr and low 4 pF junction capacitance enable reduced switching losses in flyback and buck-derived topologies.
Thermally, it features a 32°C/W junction-to-case resistance and 150°C/W junction-to-ambient resistance, supporting operation up to 150°C junction temperature under defined PCB copper area and airflow conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum non-repetitive reverse voltage the device blocks without breakdown; defines usable input voltage range in DC–DC converters. |
| IF | 0.5 A - Continuous average forward current at TA = 75°C on FR-4 PCB with 1-inch² copper; sets output power capability in low-power supplies. |
| trr | 150 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables >500 kHz switching in hard-switched topologies with minimal tail current loss. |
| VF | ≤1.3 V - Forward voltage drop at IF = 0.5 A and TJ = 25°C; directly impacts conduction loss and thermal rise in series diode configurations. |
| CJ | 4 pF - Junction capacitance at 1 MHz and VR = 4.0 V; limits high-frequency noise coupling and EMI generation in snubber networks. |
| TJ max | 150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments with proper thermal design. |
Pinout & Package
Package: Sub SMA - Surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated compound, cathode polarity indicated by band, weight ≈0.019 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit (e.g., switch node in flyback secondary); must be routed with low-inductance trace for fast recovery performance. |
| Cathode | Forward current exit point | Marked by band; connects to output rail or snubber resistor; polarity reversal causes catastrophic failure under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in ASIL-B compliant lighting and body control modules. |
| Glass passivated junction | Provides stable leakage current (<5 µA @ 25°C) and long-term stability against humidity and contamination in harsh environments. |
| Moisture sensitivity level 1 | Eliminates need for baking prior to reflow; compatible with standard SMT assembly lines without special handling. |
| Metallurgically bonded construction | Ensures robust thermal interface between die and leadframe, sustaining 10 A IFSM surge without bond wire lift-off. |
Applications
| Automotive LED Lighting | DC–DC Buck Converter Output Rectification |
|---|---|
Use Scenario: High-brightness LED headlamp driver with 12 V nominal input and PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology, conducting during low-side switch off-time. Use Value: 150 ns trr minimizes reverse recovery charge (Qrr), reducing switching loss and thermal stress during 200–500 kHz operation. | Use Scenario: 5 V/0.3 A isolated auxiliary supply in infotainment system power tree. IC Role / Device Role / Timing Role: Secondary-side rectifier in flyback converter, converting transformer output to regulated DC. Use Value: 200 V VRRM safely handles reflected voltage spikes from transformer leakage inductance under load transients. |
| Snubber Network in Automotive Power Modules | Industrial Sensor Power Supply Input Protection |
Use Scenario: RC snubber across IGBT gate driver output in motor control inverter stage. IC Role / Device Role / Timing Role: Fast clamping diode that absorbs turn-off voltage spikes and limits dV/dt stress on gate oxide. Use Value: Low CJ (4 pF) prevents capacitive loading of gate drive signal while enabling rapid clamping response within 150 ns. | Use Scenario: 24 V field-powered analog sensor node with transient overvoltage exposure. IC Role / Device Role / Timing Role: Reverse polarity protection and input rectification before LDO regulator. Use Value: AEC-Q101 qualification and 150°C TJ max ensure reliable operation in unventilated enclosures near motors or solenoids. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02U | VRRM = 200 V, IF = 1.0 A, trr = 30 ns, DO-214AC package | Higher current rating and faster recovery, but larger footprint and higher cost | Preferred where higher surge margin or <100 ns trr is required; requires PCB layout revision. |
| ES1D-E3/57T | VRRM = 200 V, IF = 1.0 A, trr = 35 ns, SMA package (not Sub SMA) | Slightly larger SMA outline, same pin compatibility but different thermal pad geometry | Drop-in replacement only if board pad layout matches standard SMA; otherwise, rework needed for thermal relief. |
Compared with STTH1R02U and ES1D-E3/57T, the RSFDLH offers tighter thermal resistance (32°C/W vs. ~40–45°C/W) in a smaller Sub SMA footprint, making it optimal for space-constrained automotive modules where 0.5 A rating suffices and AEC-Q101 compliance is mandatory.
Availability
RSFDLH is available at Aetrix Electronics and suitable for automotive LED lighting, DC–DC converter output rectification, snubber networks, and industrial sensor power supply input protection requiring stable component supply and AEC-Q101 assurance.
Supply support for RSFDLH 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 for automotive and industrial markets.
The RSFDLH belongs to TSC's RSF-series fast recovery rectifier family, engineered specifically for AEC-Q101-compliant automotive power conversion where compact size, fast switching, and high-temperature reliability are critical.
FAQ
What is the maximum junction temperature rating for RSFDLH?
The RSFDLH has a maximum junction temperature (TJ max) of +150°C, verified per AEC-Q101 stress testing. This rating allows continuous operation in under-hood automotive environments when mounted on a PCB with ≥1-inch² copper pour and ambient temperatures up to +105°C. Derating curves in the RSFDLH datasheet define safe IF limits above 75°C ambient.
Is RSFDLH pin-compatible with standard SMA packages?
No, RSFDLH uses the Sub SMA package, which is dimensionally smaller than standard SMA (DO-214AC). While both have two terminals and identical cathode band marking, Sub SMA has reduced body length (3.7 mm vs. 4.2 mm) and narrower lead spacing (2.3 mm vs. 2.7 mm). Direct substitution requires verification of pad layout and thermal relief design.
What does the "DLH" suffix indicate in RSFDLH?
The "DLH" suffix in RSFDLH identifies the specific voltage grade and marking code within the RSF-series: "D" corresponds to 200 V VRRM, and "LH" denotes the Sub SMA package with green molding compound and standard lead finish. The full marking on the device is "FDL", consistent with Taiwan Semiconductor's ordering code convention.
Does RSFDLH meet halogen-free requirements?
Yes, RSFDLH complies with IEC 61249-2-21 for halogen-free materials. The molding compound contains no chlorine or bromine above threshold levels, and all plating and internal metallization systems are certified halogen-free-critical for automotive OEM compliance and RoHS-aligned manufacturing.
What is the reverse recovery time (trr) test condition for RSFDLH?
The RSFDLH reverse recovery time is specified as ≤150 ns under the condition: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, measured at TA = 25°C. This reflects real-world hard-switching behavior in DC–DC converters and ensures predictable turn-off loss in designs operating up to 500 kHz.
RSFDLH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 4pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
RSFDLH FAQ
1.How can I place an order for RSFDLH through Aetrix?
Please submit a Request for Quotation (RFQ) for RSFDLH 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 RSFDLH reliable?
The price and inventory of RSFDLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RSFDLH is usually 5 days.
3.What payment methods are accepted for RSFDLH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RSFDLH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RSFDLH?
RSFDLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RSFDLH 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 RSFDLH?
For technical support, including RSFDLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RSFDLH requirements.
6.How does Aetrix verify that RSFDLH is sourced from the original manufacturer or authorized distributors?
All RSFDLH 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 RSFDLH meets industry standards.
7.What is the process for return or replacement of RSFDLH?
All RSFDLH units undergo pre-shipment inspection (PSI). If there is an issue with RSFDLH, 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 RSFDLH part is unused and in its original packaging.
Return procedure for RSFDLH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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