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Semtech Corporation SC431LISK-1TRT
- Part No.:
- SC431LISK-1TRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SC431LISK-1TRT.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,235
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Product details
Overview
SC431LISK-1TRT 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, 20mΩ dynamic resistance, and 175pF junction capacitance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC431LISK-1TRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat voltage response, DFN-6 package layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards.
Technical Context
The SC431LISK-1TRT 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 and across −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with a 22V reverse stand-off voltage (VRWM) and 25–27.9V reverse breakdown (VBR), delivers <600nA leakage at 22V, and integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) to maximize surge current handling and minimize parasitic inductance in PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22V - Maximum continuous operating voltage before clamping initiates |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - Stable protection threshold under worst-case surge |
| Peak Pulse Current | 40A (8/20μs) - Meets IEC 61000-4-5 Level 4 industrial surge requirements |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Robust handling of human-body-model ESD events |
| Dynamic Resistance | 20mΩ - Enables flat clamping curve and minimizes voltage overshoot during fast transients |
| Junction Capacitance | 175pF at 22V, 1MHz - Low enough for 22V bus protection without signal integrity degradation |
| Operating Temperature | −40°C to +125°C - Fully specified performance across automotive and industrial ambient ranges |
Pinout & Package
SC431LISK-1TRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required (energy dissipated in silicon). All six pins are electrically active and must be connected per functional role for rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to minimize inductance and maximize 40A capability |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., USB PD VBus); connection of all three ensures uniform current sharing and thermal distribution |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | FET-based shunt delivers ≤0.5V variation in clamping from 24A to 40A, eliminating voltage rise seen in TVS diodes |
| Temperature-stable clamping | Clamping voltage remains 27.5–28V from −40°C to +125°C - critical for industrial equipment reliability |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports repeated lightning-surge events without degradation |
| Low-leakage protection | ≤600nA reverse leakage at 22V enables use on always-on power rails without battery drain concerns |
| Compact DFN layout | 1.6mm × 1.6mm footprint saves >50% board area vs. SO-8 or SOT-23 alternatives while maintaining 40A rating |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the 20–22V VBus line of USB Type-C connectors supporting up to 100W power delivery in notebooks and docking stations. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at the connector, clamping surges before they reach the PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current-well below the 30–33V damage threshold of common PD controllers-ensuring robust system-level compliance. | Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways exposed to field-installed wiring surges. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage stress on the load switch's internal MOSFET during 1kV/42Ω IEC 61000-4-5 events. Use Value: Prevents gate oxide damage and latch-up in downstream switches by holding clamping voltage stable at 28V even at 125°C ambient-unachievable with standard TVS diodes. |
| Storage Device Power Rail Protection | Tablet & Industrial Tablet VBus Protection |
Use Scenario: Securing 22V-capable power rails in NVMe SSD enclosures and external storage docks subject to hot-plug ESD and cable-borne surges. IC Role / Device Role / Timing Role: Single-device solution for high-voltage rail protection, replacing multi-component TVS+capacitor networks. Use Value: 175pF capacitance avoids signal distortion on high-speed auxiliary control lines, while 40A rating handles repetitive surge stress in ruggedized enclosures. | Use Scenario: Protecting the main power input of fanless industrial tablets and consumer tablets with USB-C charging, operating in variable-temperature environments. IC Role / Device Role / Timing Role: Clamping element on the VBus path between connector and buck converter input, ensuring safe startup and sustained operation. Use Value: −40°C to +125°C guaranteed clamping stability eliminates derating calculations and enables single-BOM deployment across global temperature zones. |
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 | Same die, identical electrical specs, identical DFN-6 package; differs only in tape-and-reel packaging (3,000 pcs/reel vs. SC431LISK-1TRT's unspecified quantity) | No functional difference; suitable for same USB PD, load switch, and industrial VBus use cases | Select TDS2211P.C if standard Semtech reel quantity aligns with production planning |
| uClamp2411ZA | 24V VRWM, lower 24A IPP rating, higher 30V clamping, smaller 0.65mm × 0.65mm DFN-2 package | Better suited for CC/SBU lines in USB-C; insufficient for 40A VBus protection due to lower surge rating and less stable clamping | Use uClamp2411ZA only for auxiliary signal lines-not as a replacement for SC431LISK-1TRT on main power rails |
Compared with TDS2211P.C (identical function, packaging variant) and uClamp2411ZA (lower-power signal-line device), SC431LISK-1TRT provides the only DFN-6 solution with guaranteed 40A/28V clamping stability across full industrial temperature range-making it uniquely suitable for high-reliability 22V bus protection where surge margin and thermal consistency are non-negotiable.
Availability
SC431LISK-1TRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch front-ends, and high-voltage storage device power rails requiring stable component supply and long-term design-in support.
Supply support for SC431LISK-1TRT 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 ICs for precision sensing, protection, and connectivity.
The Transient Diverting Suppressor (TDS) product line was developed to replace conventional TVS diodes in high-energy EOS applications, delivering flat clamping, temperature stability, and FET-level surge robustness for next-generation power interfaces.
FAQ
What is the maximum continuous operating voltage for SC431LISK-1TRT?
The SC431LISK-1TRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without entering clamping mode. This makes SC431LISK-1TRT ideal for protecting 20V USB PD VBus lines and other 22V-rated industrial power rails where reliable standoff is essential prior to transient onset.
How does SC431LISK-1TRT achieve stable clamping voltage across temperature?
SC431LISK-1TRT achieves stable clamping via a surge-rated FET shunt architecture: its trigger circuit activates the FET at ~25–27.9V, and the FET's RDS(on) decreases under surge, maintaining clamping at 27.5–28V from −40°C to +125°C. Unlike TVS diodes, SC431LISK-1TRT does not exhibit voltage drift with temperature-verified in datasheet Figure 3 and Table 2.
Can SC431LISK-1TRT replace standard TVS diodes in USB PD designs?
Yes-SC431LISK-1TRT is engineered as a drop-in upgrade for 22V TVS diodes in USB PD VBus protection. Its 27.5–28V clamping at 40A stays well below typical PD controller damage thresholds (≥30V), and its flat response eliminates the need for over-spec'ing IPP to compensate for TVS voltage rise at high temperature-directly improving design margin for SC431LISK-1TRT.
What is the recommended PCB layout for SC431LISK-1TRT?
Place SC431LISK-1TRT as close as possible to the protected connector. Connect all three IN pins (4–6) via a single low-inductance trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using multiple vias. Avoid thermal pads-the device dissipates energy internally, and this layout ensures full 40A surge capability for SC431LISK-1TRT.
Is SC431LISK-1TRT compliant with IEC 61000-4-5 surge standards?
Yes-SC431LISK-1TRT is rated for ±1kV (1.2/50μs voltage, 8/20μs current, RS=42Ω) and 40A (8/20μs) per IEC 61000-4-5, meeting Level 4 industrial surge immunity. Its 27.5–28V clamping at 40A ensures protected ICs remain within safe operating voltage during standardized surge testing-fully documented in the SC431LISK-1TRT datasheet Absolute Maximum Ratings and Electrical Characteristics tables.
SC431LISK-1TRT 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:
- ±1%
- 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-1TRT FAQ
1.How can I place an order for SC431LISK-1TRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC431LISK-1TRT 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-1TRT reliable?
The price and inventory of SC431LISK-1TRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC431LISK-1TRT is usually 5 days.
3.What payment methods are accepted for SC431LISK-1TRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC431LISK-1TRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC431LISK-1TRT?
SC431LISK-1TRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC431LISK-1TRT 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-1TRT?
For technical support, including SC431LISK-1TRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC431LISK-1TRT requirements.
6.How does Aetrix verify that SC431LISK-1TRT is sourced from the original manufacturer or authorized distributors?
All SC431LISK-1TRT 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-1TRT meets industry standards.
7.What is the process for return or replacement of SC431LISK-1TRT?
All SC431LISK-1TRT units undergo pre-shipment inspection (PSI). If there is an issue with SC431LISK-1TRT, 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-1TRT part is unused and in its original packaging.
Return procedure for SC431LISK-1TRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC431LISK-1TRT Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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