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Taiwan Semiconductor Corporation RS1MLH
- Part No.:
- RS1MLH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
RS1MLH.pdf
- Description:
- 500NS, 0.8A, 1000V, FAST RECOVER
- Quantity:
- Payment:
- Shipping:
Inventory:6,785
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Product details
Overview
RS1MLH from Taiwan Semiconductor is a 1000V, 0.8A fast recovery surface-mount rectifier in Sub SMA package, featuring 500 ns reverse recovery time, 1.3 V max forward voltage at 0.8 A, and AEC-Q101 qualification for automotive-grade reliability-used in snubber networks and freewheeling paths in high-voltage DC-DC converters.
For engineers reviewing the RS1MLH datasheet, RS1MLH pinout, RS1MLH application, or RS1MLH equivalent, key selection criteria include peak reverse voltage (1000 V), surge current capability (30 A), junction-to-lead thermal resistance (32 °C/W), moisture sensitivity level (MSL 1), and compliance with AEC-Q101 for under-hood automotive use.
Technical Context
The RS1MLH employs a single-die, glass-passivated silicon junction optimized for fast switching in high-voltage, low-current rectification. Its 500 ns trr and 10 pF junction capacitance support efficient operation in 50–500 kHz switching topologies where reverse recovery loss must be minimized.
Designed for surface-mount assembly with matte tin-plated leads (J-STD-002 compliant) and UL 94V-0 molding compound, the RS1MLH operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports primary-side rectification in offline SMPS up to 700 V DC bus |
| IF | 0.8 A continuous - suitable for auxiliary power rails and low-power bias supplies |
| IFSM | 30 A (8.3 ms half-sine) - withstands inrush and transient overloads in automotive lighting circuits |
| trr | 500 ns - reduces switching losses in flyback and forward converter freewheeling diodes |
| RθJL | 32 °C/W - enables direct PCB copper pour heat sinking without heatsink in space-constrained layouts |
| IR @ 125°C | 50 µA - ensures low leakage in high-temperature engine-control modules |
Pinout & Package
Package: Sub SMA - compact surface-mount outline with cathode band marking, 0.019 g weight, and J-STD-020 MSL 1 rating for unlimited floor life.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal | Connected to lower-potential node (e.g., switch node in buck-derived topologies) |
| Cathode | Current exit terminal | Marked by band; ties to output rail or energy storage inductor in freewheeling path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TC, and HAST |
| Glass passivated junction | Enhances long-term reliability and humidity resistance in unsealed under-hood environments |
| Fast recovery (500 ns) | Reduces reverse recovery charge (Qrr) and associated switching losses vs. standard rectifiers |
| Sub SMA package | Enables automated placement and reflow compatibility while minimizing board area vs. SMA |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive for eco-conscious manufacturing |
Applications
| Automotive Lighting | DC-DC Converter Snubber |
|---|---|
Use Scenario: LED headlamp driver with PWM dimming and transient suppression. IC Role / Device Role / Timing Role: Freewheeling diode in boost converter stage and snubber clamp for MOSFET voltage spikes. Use Value: 1000 V VRRM prevents breakdown during load-dump transients; 500 ns trr limits ringing and EMI generation. | Use Scenario: High-frequency isolated DC-DC module for infotainment power supply. IC Role / Device Role / Timing Role: RCD snubber diode absorbing turn-off energy from transformer leakage inductance. Use Value: Low Qrr and 32 °C/W RθJL allow stable operation at 125°C ambient without derating. |
| Engine Control Unit Bias Supply | Industrial Sensor Interface Protection |
Use Scenario: Auxiliary 12 V → 5 V/3.3 V bias rail powering microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Output rectifier in flyback converter delivering isolated low-power supply. Use Value: 50 µA IR at 125°C ensures minimal standby current drain in always-on ECU subsystems. | Use Scenario: Signal conditioning front-end for 4–20 mA loop-powered sensors in factory automation. IC Role / Device Role / Timing Role: Reverse polarity protection and transient clamping diode on input power line. Use Value: Glass passivation and AEC-Q101 qualification provide robustness against industrial ESD and voltage surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 600 V VRRM, 1 A IF, 150 ns trr, SMA package | Limited to ≤600 V systems; faster recovery but lower voltage margin | Prefer when higher current (1 A) and tighter trr (<200 ns) outweigh voltage requirement |
| SB1100 | 1000 V VRRM, 1 A IF, 500 ns trr, SMA package | Higher IF rating but larger SMA footprint and no AEC-Q101 qualification | Select when board space allows SMA and automotive qualification is not required |
Compared with STTH1R06 and SB1100, the RS1MLH uniquely combines 1000 V rating, AEC-Q101 compliance, and Sub SMA compactness-making it optimal for space- and reliability-critical automotive DC-DC stages where voltage margin and qualification are non-negotiable.
Availability
RS1MLH is available at Aetrix Electronics and suitable for automotive lighting, engine control unit bias supplies, and industrial sensor interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for RS1MLH 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 RS1MLH belongs to TSC's RS1xLH fast recovery rectifier family-designed specifically for high-reliability, high-voltage switching power supplies in automotive and industrial environments where thermal stability and qualification compliance are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the RS1MLH?
The RS1MLH has a VRRM of 1000 V, verified per Taiwan Semiconductor's A2103 datasheet revision. This rating allows the RS1MLH to safely block reverse voltages up to 1000 V in continuous operation, making it suitable for high-voltage DC-DC converters and automotive load-dump protection circuits where transient spikes exceed 800 V. The RS1MLH maintains this rating across its full operating temperature range.
Is the RS1MLH qualified for automotive applications?
Yes, the RS1MLH is AEC-Q101 qualified, as explicitly stated in the Taiwan Semiconductor datasheet. This qualification confirms that the RS1MLH has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress test (HAST)-ensuring reliability in automotive under-hood environments. The RS1MLH is commonly deployed in automotive lighting and engine control units.
What is the reverse recovery time (trr) of the RS1MLH and how is it measured?
The RS1MLH has a reverse recovery time (trr) of 500 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the official datasheet. This parameter reflects the time required for the device to transition from conduction to blocking state, directly impacting switching losses in high-frequency converters. The RS1MLH's 500 ns trr is consistent across its rated temperature range and contributes to reduced EMI in snubber and freewheeling applications.
Does the RS1MLH have a halogen-free and RoHS-compliant construction?
Yes, the RS1MLH is both halogen-free per IEC 61249-2-21 and RoHS compliant, as confirmed in the Taiwan Semiconductor product documentation. Its molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below RoHS thresholds. These attributes make the RS1MLH suitable for environmentally regulated industrial and automotive production programs requiring full material declarations.
What is the thermal resistance from junction to lead (RθJL) for the RS1MLH?
The RS1MLH has a typical junction-to-lead thermal resistance (RθJL) of 32 °C/W, enabling efficient heat transfer from the die to the PCB copper via the cathode and anode leads. This value is measured under standardized JEDEC conditions and supports thermal design in compact layouts where forced airflow is absent. For reliable operation, the RS1MLH's RθJL allows direct copper pour attachment without additional heatsinking in most automotive and industrial applications.
RS1MLH 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):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 800 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS1MLH FAQ
1.How can I place an order for RS1MLH through Aetrix?
Please submit a Request for Quotation (RFQ) for RS1MLH 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 RS1MLH reliable?
The price and inventory of RS1MLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1MLH is usually 5 days.
3.What payment methods are accepted for RS1MLH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1MLH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS1MLH?
RS1MLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS1MLH 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 RS1MLH?
For technical support, including RS1MLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1MLH requirements.
6.How does Aetrix verify that RS1MLH is sourced from the original manufacturer or authorized distributors?
All RS1MLH 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 RS1MLH meets industry standards.
7.What is the process for return or replacement of RS1MLH?
All RS1MLH units undergo pre-shipment inspection (PSI). If there is an issue with RS1MLH, 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 RS1MLH part is unused and in its original packaging.
Return procedure for RS1MLH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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