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Taiwan Semiconductor Corporation RSFKLH
- Part No.:
- RSFKLH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
RSFKLH.pdf
- Description:
- 500NS, 0.5A, 800V, FAST RECOVERY
- Quantity:
- Payment:
- Shipping:
Inventory:8,037
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Product details
Overview
RSFKLH from Taiwan Semiconductor is a fast recovery surface mount rectifier with 800 V repetitive peak reverse voltage (VRRM), 0.5 A average forward current (IF), and 500 ns reverse recovery time (trr), designed for snubber networks and automotive lighting circuits where high-speed switching and thermal robustness are required.
For engineers reviewing the RSFKLH datasheet, RSFKLH pinout, RSFKLH application, or RSFKLH equivalent, key selection criteria include its Sub SMA package, AEC-Q101 qualification, 150°C maximum junction temperature, glass-passivated junction, and moisture sensitivity level 1 compliance.
Technical Context
The RSFKLH is a single-die, unidirectional fast recovery rectifier optimized for high-efficiency DC-DC conversion and transient suppression. Its 500 ns trr enables reduced switching losses in moderate-frequency snubber and flyback auxiliary winding applications, while its 32°C/W junction-to-case thermal resistance supports reliable operation under pulsed load conditions.
Designed for automotive-grade reliability, the device features metallurgically bonded construction, matte tin-plated leads compliant with J-STD-002, and meets JESD201 Class 2 whisker resistance. It operates across –55°C to +150°C junction temperature range and is rated for 10 A non-repetitive surge current (IFSM) at 8.3 ms half-sine.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in snubber or clamp circuits |
| IF | 0.5 A - Continuous average forward current at TA = 75°C; sets steady-state power handling capability |
| trr | 500 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; determines switching loss and EMI profile |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments |
| RθJC | 32 °C/W - Thermal resistance from junction to case; informs heatsinking requirements for PCB copper area |
| IR @ 125°C | 50 µA - Reverse leakage at elevated temperature; impacts standby power in high-impedance bias networks |
Pinout & Package
Package: Sub SMA - Surface-mount, molded plastic case meeting UL 94V-0; cathode indicated by band; polarity-critical for rectification function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; must withstand 10 A surge during transients |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; carries full reverse voltage; requires clearance from adjacent traces per 800 V rating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Glass passivated junction | Enhances long-term reliability and humidity resistance versus epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates pre-conditioning step in production |
| Halogen-free construction | Complies with IEC 61249-2-21; supports RoHS-compliant and environmentally regulated end equipment |
Applications
| Automotive LED Headlamp Driver | DC-DC Converter Snubber |
|---|---|
Use Scenario: Clamping voltage spikes across MOSFETs in buck-derived headlamp drivers operating at 12–48 V input. IC Role / Device Role / Timing Role: Fast recovery rectifier in RCD snubber network; absorbs turn-off energy and limits dv/dt. Use Value: 500 ns trr ensures effective energy capture before MOSFET re-conduction; 800 V VRRM accommodates 48 V system transients with margin. | Use Scenario: Suppressing ringing in secondary-side synchronous rectifier circuits of isolated flyback converters. IC Role / Device Role / Timing Role: Unidirectional clamp diode in passive snubber; conducts only during voltage reversal phase. Use Value: Low 50 µA IR at 125°C minimizes standby loss; Sub SMA footprint allows dense layout near transformer. |
| Industrial Power Supply Auxiliary Winding | Car Interior Lighting Rectification |
Use Scenario: Providing isolated bias supply from transformer auxiliary winding in 20–60 W industrial SMPS. IC Role / Device Role / Timing Role: Output rectifier converting AC auxiliary voltage to stable DC for controller IC bias. Use Value: 150°C TJ max enables operation in enclosed enclosures; glass passivation prevents degradation under thermal cycling. | Use Scenario: Rectifying low-current AC from alternator-fed interior lamp modules (e.g., map lights, dome lights). IC Role / Device Role / Timing Role: Single-phase bridge half-leg in compact full-wave rectifier configuration. Use Value: AEC-Q101 qualification ensures lifetime reliability in vibration-prone cabin environments; 0.019 g weight avoids mechanical stress on flex PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08U | 800 V VRRM, 1 A IF, TO-277 package, 75 ns trr | Higher current rating and faster recovery; larger footprint and higher cost | Preferred when >0.5 A continuous current or <200 ns trr is required; not drop-in due to TO-277 vs. Sub SMA |
| ES1J-M3/5AT | 600 V VRRM, 1 A IF, SMA package, 35 ns trr | Lower voltage rating; significantly faster but unsuitable for 800 V clamping | Select only for ≤600 V systems needing ultrafast response; requires redesign for voltage margin and thermal derating |
Compared with STTH1R08U and ES1J-M3/5AT, RSFKLH offers optimal balance of AEC-Q101 compliance, 800 V blocking, and Sub SMA compatibility for space-constrained automotive snubbers-without over-specifying speed or current.
Availability
RSFKLH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converter snubbers, and industrial auxiliary power supplies requiring stable component supply and AEC-Q101 traceability.
Supply support for RSFKLH 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 automotive, industrial, and consumer markets since 1979.
The RSF series was developed specifically for high-reliability surface-mount rectification in automotive power systems, emphasizing AEC-Q101 qualification, thermal resilience, and automated assembly compatibility.
FAQ
What is the maximum junction temperature rating for RSFKLH?
The RSFKLH has a maximum junction temperature (TJ max) of +150°C, verified per AEC-Q101 stress testing. This rating allows sustained operation in under-hood automotive environments and enclosed industrial power supplies. Derating curves in the RSFKLH datasheet define allowable IF versus ambient temperature, and the 32°C/W RθJC value supports thermal design using standard PCB copper pour.
Is RSFKLH pin-compatible with other devices in the RSF series?
No-RSFKLH uses the Sub SMA package shared across the RSFALH–RSFMLH family, but pinout is fixed as anode/cathode only; no multi-pin interface exists. All variants share identical mechanical outline and polarity marking (cathode band), enabling consistent placement in automated SMT lines, though electrical ratings-including VRRM (800 V) and trr (500 ns)-are specific to RSFKLH.
Does RSFKLH meet automotive qualification standards?
Yes, RSFKLH is explicitly AEC-Q101 qualified, covering stress tests such as high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. This qualification is documented in Taiwan Semiconductor's official RSF series qualification report (Version A2103), confirming suitability for automotive lighting, body control, and powertrain auxiliary circuits.
What is the reverse recovery time (trr) specification for RSFKLH?
The RSFKLH has a maximum reverse recovery time (trr) of 500 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the Electrical Specifications table on page 2 of the RSFKLH datasheet (Version A2103) and directly impacts switching loss and EMI performance in snubber and clamp applications.
Can RSFKLH be used in lead-free reflow processes?
Yes, RSFKLH is compatible with lead-free reflow soldering per J-STD-020. Its moisture sensitivity level is rated Level 1, meaning it can be exposed to ambient conditions indefinitely without baking prior to reflow. The matte tin-plated leads meet J-STD-002 solderability requirements, and the UL 94V-0 molding compound withstands peak temperatures up to 260°C.
RSFKLH 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):
- 800 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):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 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
RSFKLH FAQ
1.How can I place an order for RSFKLH through Aetrix?
Please submit a Request for Quotation (RFQ) for RSFKLH 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 RSFKLH reliable?
The price and inventory of RSFKLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RSFKLH is usually 5 days.
3.What payment methods are accepted for RSFKLH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RSFKLH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RSFKLH?
RSFKLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RSFKLH 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 RSFKLH?
For technical support, including RSFKLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RSFKLH requirements.
6.How does Aetrix verify that RSFKLH is sourced from the original manufacturer or authorized distributors?
All RSFKLH 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 RSFKLH meets industry standards.
7.What is the process for return or replacement of RSFKLH?
All RSFKLH units undergo pre-shipment inspection (PSI). If there is an issue with RSFKLH, 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 RSFKLH part is unused and in its original packaging.
Return procedure for RSFKLH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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