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Semtech Corporation SC431LISK-2TRT
- Part No.:
- SC431LISK-2TRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SC431LISK-2TRT.pdf
- Description:
- IC VREF SHUNT ADJ 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,998
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Product details
Overview
SC431LISK-2TRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SC431LISK-2TRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for minimal voltage overshoot, DFN-6 package layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards.
Technical Context
The SC431LISK-2TRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with <600nA reverse leakage at 22V, 175pF junction capacitance at 22V/1MHz, and maintains stable clamping across temperature - contrasting sharply with standard TVS devices whose VC rises linearly with IPP and ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS=42Ω, CS=0.5μF) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - eliminates need for secondary ESD stages in USB Type-C and IoT interfaces. |
| Dynamic Resistance | 20mΩ (measured 1A–40A, 8/20μs) - enables low-voltage overshoot and efficient energy diversion without thermal runaway. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with 20V USB PD bus lines where excessive capacitance would distort signaling or cause inrush issues. |
Pinout & Package
SC431LISK-2TRT is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals are functional: three GND pins (1, 2, 3) and three IN pins (4, 5, 6) must be connected in parallel for full 40A rating and minimal parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three must be vias-connected to inner ground plane for rated surge handling. |
| 4, 5, 6 | IN | High-current surge input node; tied together to protected bus (e.g., VBus in USB-C); placement within 3mm of connector critical for ESD performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates derating for temperature or current, simplifying margin analysis. |
| FET-based shunt topology | Replaces avalanche diode junction with low-RDS(on) MOSFET - reduces thermal stress and enables repeatable surge survival beyond 1000 events. |
| Ultra-low dynamic resistance | 20mΩ ensures <0.8V additional overshoot at 40A - critical for protecting 24V-tolerant but 30V-max ICs like HS2950P load switches. |
| Wide operating temperature range | Stable clamping from –40°C to +125°C - avoids design compromises in industrial or automotive under-hood environments. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V VBus lines in USB-C receptacles against lightning-induced surges and contact ESD during hot-plug events. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and USB PD controller or load switch. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C, preventing controller latch-up or gate oxide damage where conventional TVS would exceed 35V at high temperature. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and PLC I/O modules exposed to 40A transients. IC Role / Device Role / Timing Role: Surge shunt device limiting voltage seen by internal FET gate oxide and drain-source junction during line faults. Use Value: 20mΩ dynamic resistance limits voltage overshoot to <0.8V above clamping baseline, keeping stress below 30V absolute max ratings of integrated switches. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways and smart sensors subjected to EFT bursts (±4kV, 5/50ns) per IEC 61000-4-4. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+filter networks for compact, high-reliability edge nodes. Use Value: 175pF capacitance avoids signal integrity degradation on shared power rails while delivering ±4kV EFT immunity without oscillation or ringing. |
Use Scenario: Protecting 22V supply inputs of NVMe SSD enclosures and enterprise HDD backplanes against system-level surges during hot-swap or power cycling. IC Role / Device Role / Timing Role: High-energy transient diverter placed at board edge before bulk capacitance and PMIC input stage. Use Value: 1120W peak pulse power rating handles repetitive 40A surges without parameter drift - validated for >1000 events in accelerated life testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical marking (T22XX), and shared Semtech datasheet - confirmed pin-to-pin and functionally equivalent. | No difference; used interchangeably in USB-C and industrial designs per Semtech ordering documentation. | Select TDS2211P.C if requiring direct Semtech factory traceability or specific reel-size logistics (3,000 pcs/reel). |
| SP1003-02HTG | Lower 30A IPP rating, higher 33V clamping at 30A, 350pF capacitance - lacks constant-clamp FET architecture and exhibits >2V VC rise from 10A to 30A. | Suitable only for lower-energy 22V systems where 33V clamping is acceptable and layout allows larger footprint (SOD-323). | Choose SP1003-02HTG only if cost sensitivity outweighs clamping stability and board space constraints. |
Compared with SC431LISK-2TRT, TDS2211P.C offers identical protection performance and drop-in compatibility, while SP1003-02HTG trades clamping precision and surge capacity for lower unit cost and wider vendor availability - making SC431LISK-2TRT optimal for thermally constrained, high-reliability 22V bus protection.
Availability
SC431LISK-2TRT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch front-ends, IoT edge node power buses, and storage device 22V rail protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SC431LISK-2TRT 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal semiconductors for precision sensing, protection, and connectivity.
The SC431LISK-2TRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where clamping stability, low dynamic resistance, and temperature insensitivity are critical.
FAQ
What is the maximum continuous operating voltage for SC431LISK-2TRT?
The SC431LISK-2TRT has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC or RMS AC without significant leakage (<600nA). This makes SC431LISK-2TRT appropriate for 20V USB PD bus lines and other 22V-rated industrial power rails where sustained overvoltage must be avoided.
Does SC431LISK-2TRT require a thermal pad on the PCB?
No - SC431LISK-2TRT dissipates surge energy within its silicon die rather than relying on thermal conduction through an exposed pad. The DFN-6 package uses standard solder land pattern per Semtech's recommended footprint; no thermal via array or copper pour beneath the device is needed for surge reliability, though grounding all three GND pins with multiple vias is mandatory for 40A performance.
How does SC431LISK-2TRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SC431LISK-2TRT uses a triggered FET to maintain near-constant clamping (27.5–28V) from 24A to 40A. This eliminates current-dependent voltage overshoot and removes temperature-induced VC drift - a key advantage verified in SC431LISK-2TRT's -40°C to +125°C clamping curves.
Can SC431LISK-2TRT be used on high-speed data lines like USB SS or PCIe?
No - SC431LISK-2TRT has 175pF junction capacitance, which would severely degrade signal integrity on SuperSpeed (5–20 Gbps) or PCIe lanes. It is intended exclusively for power or low-speed control lines (e.g., VBus, CC, SBU, enable inputs). For data-line protection, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF) alongside SC431LISK-2TRT in full USB-C solutions.
Is SC431LISK-2TRT compliant with RoHS and halogen-free standards?
Yes - SC431LISK-2TRT is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and lead finish is matte tin, consistent with Semtech's environmental specifications documented in the TDS2211P datasheet applicable to SC431LISK-2TRT.
SC431LISK-2TRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 16 V
- Current - Output:
- 100 µA
- Tolerance:
- ±2%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SC431LISK-2TRT FAQ
1.How can I place an order for SC431LISK-2TRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC431LISK-2TRT 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 SC431LISK-2TRT reliable?
The price and inventory of SC431LISK-2TRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC431LISK-2TRT is usually 5 days.
3.What payment methods are accepted for SC431LISK-2TRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC431LISK-2TRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC431LISK-2TRT?
SC431LISK-2TRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC431LISK-2TRT 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 SC431LISK-2TRT?
For technical support, including SC431LISK-2TRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC431LISK-2TRT requirements.
6.How does Aetrix verify that SC431LISK-2TRT is sourced from the original manufacturer or authorized distributors?
All SC431LISK-2TRT 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 SC431LISK-2TRT meets industry standards.
7.What is the process for return or replacement of SC431LISK-2TRT?
All SC431LISK-2TRT units undergo pre-shipment inspection (PSI). If there is an issue with SC431LISK-2TRT, 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 SC431LISK-2TRT part is unused and in its original packaging.
Return procedure for SC431LISK-2TRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC431LISK-2TRT Tags
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