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Taiwan Semiconductor Corporation RS1MLSH
- Part No.:
- RS1MLSH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123H
- Datasheet:
-
RS1MLSH.pdf
- Description:
- 300NS, 1.2A, 1000V, FAST RECOVER
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
RS1MLSH from Taiwan Semiconductor is a 1000V, 1.2A fast recovery surface-mount rectifier in SOD-123HE package, designed for high-efficiency DC-DC conversion and automotive snubber circuits with 300 ns reverse recovery time and 50 A surge capability.
For engineers reviewing the RS1MLSH datasheet, RS1MLSH pinout, RS1MLSH application, or RS1MLSH equivalent, key selection factors include its 1000 V repetitive peak reverse voltage, 1.3 V max forward voltage at 1.2 A, AEC-Q101 qualification, SOD-123HE thermal performance (RθJA = 80 °C/W), and cathode-band polarity marking.
Technical Context
The RS1MLSH is a single-die, silicon planar fast recovery rectifier optimized for high-voltage switching applications where low conduction loss and controlled reverse recovery are critical. Its 1000 V VRRM, 300 ns trr, and 50 A IFSM support robust operation in automotive lighting and DC-DC converters under transient stress.
Thermally, it delivers RθJL = 20 °C/W to lead and operates up to +175 °C junction temperature. The SOD-123HE package features matte tin-plated leads compliant with J-STD-002 and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports primary-side rectification in 800 V bus systems without derating |
| IF | 1.2 A continuous - suitable for low-to-medium power DC-DC stages (e.g., 12–48 V outputs) |
| IFSM | 50 A (8.3 ms) - withstands inrush and fault currents in automotive load dumps |
| trr | 300 ns - minimizes switching losses and EMI in 100–500 kHz SMPS designs |
| VF max | 1.3 V @ 1.2 A - reduces conduction loss vs. standard recovery diodes (typ. >1.7 V) |
| TJ max | +175 °C - enables operation in under-hood automotive environments |
| RθJA | 80 °C/W - defines thermal limit for PCB copper area design in SMT layouts |
Pinout & Package
SOD-123HE surface-mount package with cathode-indicated band; compact footprint (2.60 × 1.40 mm), 0.022 g weight, UL 94V-0 molding compound, and matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in flyback secondary) |
| Cathode | Current exit point during forward conduction; marked by band | Connected to output rail or snubber network; polarity must match layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability (temperature cycling, HTRB, HTGB) |
| Fast recovery (trr ≤ 300 ns) | Reduces switching loss and ringing in high-frequency converters |
| High surge rating (IFSM = 50 A) | Survives repetitive load dump transients in 12 V/24 V vehicle systems |
| SOD-123HE package | Enables automated placement and achieves 20 °C/W junction-to-lead thermal resistance |
| Moisture sensitivity level 1 | No bake required before reflow; compatible with standard SMT assembly lines |
Applications
| Automotive LED Headlamp Driver | Industrial DC-DC Converter Output Rectifier |
|---|---|
Use Scenario: High-brightness LED arrays powered from buck-boost converters in headlamp modules. IC Role / Device Role / Timing Role: Output rectifier handling 1.2 A continuous current with fast turn-off to suppress voltage spikes during PWM dimming. Use Value: 1000 V VRRM provides margin against transients; 300 ns trr prevents cross-conduction loss in synchronous rectifier-assisted topologies. | Use Scenario: Secondary-side rectification in isolated 24 V input, 5 V/3 A industrial SMPS. IC Role / Device Role / Timing Role: Fast recovery diode in flyback or forward converter output stage. Use Value: 1.3 V VF max ensures <1.6 W conduction loss at full load; SOD-123HE footprint allows dense board layout. |
| Automotive Snubber Network | On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: RC snubber across MOSFETs/IGBTs in 400 V traction inverter gate drivers. IC Role / Device Role / Timing Role: Clamp diode absorbing turn-off energy with minimal reverse recovery tail. Use Value: 300 ns trr limits snubber dissipation; 1000 V rating covers worst-case VDS overshoot in 650 V devices. | Use Scenario: Auxiliary 12 V supply derived from main OBC DC link for control circuitry. IC Role / Device Role / Timing Role: Input rectifier stepping down 400–800 V DC link to intermediate bus. Use Value: AEC-Q101 qualification ensures lifetime reliability; +175 °C TJ max supports operation near heat-generating power modules. |
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 | 600 V VRRM, 1.05 A IF, 75 ns trr, SOD-123 package | Limited to ≤600 V systems; faster recovery but lower voltage rating | Select when ultra-fast recovery (<100 ns) is prioritized over voltage margin |
| RB055LAM-40 | 40 V VRRM, 5 A IF, 30 ns trr, SOD-123FL package | Low-voltage, high-current use only; not suitable for 1000 V applications | Use only in ≤40 V auxiliary rails where surge immunity is secondary |
Compared with STTH1L06S and RB055LAM-40, the RS1MLSH uniquely balances 1000 V blocking, 1.2 A current, and 300 ns recovery for automotive and industrial HV DC-DC-neither alternative meets all three requirements simultaneously.
Availability
RS1MLSH is available at Aetrix Electronics and suitable for automotive LED lighting, DC-DC converter output rectification, and snubber networks requiring stable component supply across production lifecycles.
Supply support for RS1MLSH 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 RS1MLSH belongs to TSC's AEC-Q101-qualified fast recovery rectifier family, engineered specifically for high-reliability, high-voltage switching applications in harsh-environment automotive and industrial power systems.
FAQ
What is the maximum repetitive peak reverse voltage of the RS1MLSH?
The RS1MLSH has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, verified per Taiwan Semiconductor's B2304 datasheet revision. This rating allows safe operation in 800 V nominal bus systems with sufficient margin for transients. The RS1MLSH is the highest-voltage variant in the RS1xLSH series, distinct from RS1JLSH (600 V) and RS1KLSH (800 V).
Is the RS1MLSH qualified for automotive applications?
Yes, the RS1MLSH is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and lighting systems. This qualification covers stress tests such as temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-specifically validated for the RS1MLSH device marking code RMLS.
What package type does the RS1MLSH use, and what are its key mechanical attributes?
The RS1MLSH uses the SOD-123HE surface-mount package, measuring 2.60 mm × 1.40 mm with 0.022 g mass. Key attributes include UL 94V-0 flammability-rated molding compound, matte tin-plated leads compliant with J-STD-002, and cathode polarity indicated by a visible band. Its RθJL is 20 °C/W, enabling efficient heat transfer to the PCB pad.
What is the forward voltage drop of the RS1MLSH at rated current?
The RS1MLSH exhibits a maximum forward voltage (VF) of 1.3 V at 1.2 A and 25 °C junction temperature, per the electrical specifications table in the official datasheet. This value is measured under pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss-critical for calculating thermal rise in continuous-duty applications like automotive DC-DC converters.
Does the RS1MLSH have a specified reverse recovery time, and how is it measured?
Yes, the RS1MLSH has a maximum reverse recovery time (trr) of 300 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and IRR = 0.25 A, per the test circuit shown in Figure 6 of the datasheet. This parameter directly impacts switching loss and EMI in high-frequency power supplies, making it essential for evaluating performance in 100–500 kHz SMPS designs.
RS1MLSH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123H
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 1.2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 1.2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 300 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123HE
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1MLSH FAQ
1.How can I place an order for RS1MLSH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MLSH 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 RS1MLSH reliable?
The price and inventory of RS1MLSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MLSH is usually 5 days.
3.What payment methods are accepted for RS1MLSH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MLSH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MLSH?
RS1MLSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MLSH 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 RS1MLSH?
For technical support, including RS1MLSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MLSH requirements.
6.How does Aetrix verify that RS1MLSH is sourced from the original manufacturer or authorized distributors?
All RS1MLSH 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 RS1MLSH meets industry standards.
7.What is the process for return or replacement of RS1MLSH?
All RS1MLSH units undergo pre-shipment inspection (PSI). If there is an issue with RS1MLSH, 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 RS1MLSH part is unused and in its original packaging.
Return procedure for RS1MLSH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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