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Semtech Corporation SC431LC5SK-2TRT
- Part No.:
- SC431LC5SK-2TRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SC431LC5SK-2TRT.pdf
- Description:
- IC VREF SHUNT ADJ 2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,064
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Product details
Overview
SC431LC5SK-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 24–40A, 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 SC431LC5SK-2TRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, clamping stability across temperature and current, and direct alternatives for EOS protection design-in.
Technical Context
The SC431LC5SK-2TRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-across 24–40A and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and reverse leakage <600nA at 22V. Its 175pF capacitance at 22V/1MHz and low 20mΩ dynamic resistance enable robust protection without signal integrity compromise on high-speed power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS=2Ω) - ensures downstream ICs like USB PD controllers remain below damage threshold |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for external connectors and handheld interfaces |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping response and minimal voltage rise under increasing surge current |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough to avoid signal distortion on 20V power rails while maintaining robust surge handling |
Pinout & Package
SC431LC5SK-2TRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; thermal performance relies on PCB copper area and multiple vias-not an exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current sharing and minimize parasitic inductance |
| Pins 4, 5, 6 | IN | Protected line input (e.g., USB PD VBus); parallel connection of all three pins ensures full 40A rating and uniform current distribution |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and −40°C to +125°C-eliminates derating uncertainty vs. TVS diodes |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) FET instead of PN-junction heating-enables higher reliability under repeated surges |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge, preserving clamping accuracy and reducing localized heating |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against fast repetitive bursts in industrial control environments |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V USB PD VBus lines from lightning-induced surges and connector ESD events in laptops and docking stations. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at Type-C connector, shunting surge current to ground before it reaches PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current-prevents overvoltage damage to 24V-tolerant PD controllers without over-specifying IPP. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) against EOS in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Primary front-end protector on VIN rail, limiting transient voltage to stay below internal FET drain-source breakdown. Use Value: 40A surge rating and stable clamping prevent latch-up or permanent failure of load switch ICs during 1kV/42Ω industrial surges. |
| IoT Device Power Rail Protection | Notebook/Tablet Main Power Bus Protection |
Use Scenario: Securing 22V-capable power inputs on battery-powered IoT gateways exposed to uncontrolled charging ports or field wiring. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input, operating in parallel with upstream e-fuse or PMIC. Use Value: 175pF capacitance avoids filtering or regulation loop instability, while ±30kV ESD rating ensures survivability during handling and deployment. |
Use Scenario: Reinforcing VBus protection in ultrabooks and tablets where space-constrained layouts demand high-density, high-performance surge suppression. IC Role / Device Role / Timing Role: Compact DFN-6 device mounted directly at edge connector, minimizing trace inductance to preserve clamping speed. Use Value: 1.6mm × 1.6mm footprint saves >50% board area versus SO-8 TVS solutions while delivering superior clamping consistency. |
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. SC431LC5SK-2TRT's unspecified reel count) | No functional difference; suitable for same USB PD, load switch, and industrial power rail use cases | Select TDS2211P.C when standard Semtech reel quantity and marking (T22 + date code) are required. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 30V clamping, smaller 0.65mm × 0.65mm DFN-2 package, optimized for CC/SBU lines-not rated for 40A bus protection | Limited to low-current signaling lines (CC, SBU); unsuitable for VBus or load switch input due to IPP and thermal limits | Use uClamp2411ZA only for auxiliary USB Type-C lines; SC431LC5SK-2TRT remains required for main power rail protection. |
Compared with TDS2211P.C, SC431LC5SK-2TRT offers identical protection performance but may differ in reel logistics; compared with uClamp2411ZA, SC431LC5SK-2TRT provides 2× peak current capacity, 2.5× lower clamping voltage, and validated 40A bus-level robustness-making it the sole fit for 22V power rail EOS hardening.
Availability
SC431LC5SK-2TRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device power rails requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.
Supply support for SC431LC5SK-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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The SC431LC5SK-2TRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature insensitivity are critical.
FAQ
What is the maximum continuous operating voltage for SC431LC5SK-2TRT?
The SC431LC5SK-2TRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC without significant leakage or conduction. This makes SC431LC5SK-2TRT ideal for protecting 20V USB PD VBus and other 22V-rated power rails where sustained voltage operation is required.
How does SC431LC5SK-2TRT achieve stable clamping voltage across temperature?
SC431LC5SK-2TRT uses a surge-rated FET activated by a precision trigger circuit. As surge current increases, the FET's RDS(on) decreases, counteracting voltage rise-resulting in clamping voltage of 27.5–28V from −40°C to +125°C. This behavior is confirmed in the SC431LC5SK-2TRT datasheet's clamping vs. temperature curves.
Can SC431LC5SK-2TRT replace standard TVS diodes in USB PD designs?
Yes-SC431LC5SK-2TRT is specifically validated for USB PD VBus protection. Unlike TVS diodes whose clamping rises with current and temperature, SC431LC5SK-2TRT maintains 27.5–28V clamping at 40A and 125°C, preventing overvoltage damage to PD controllers. Its 175pF capacitance also avoids interference with PD communication.
What is the recommended PCB layout for SC431LC5SK-2TRT?
Place SC431LC5SK-2TRT as close as possible to the protected connector. Connect all three IN pins (4,5,6) via a single short, wide trace; connect all three GND pins (1,2,3) to a solid ground plane using ≥3 vias. Avoid thermal pads-the device dissipates energy internally, and layout focus is on minimizing inductance, not heat sinking.
Is SC431LC5SK-2TRT compliant with industrial surge standards?
Yes-SC431LC5SK-2TRT meets IEC 61000-4-5 Level 4 (±1kV, RS=42Ω, CS=0.5μF) and supports 40A (8/20μs) surges, making it suitable for industrial equipment, remote meters, and factory automation. Its ±4kV EFT rating (IEC 61000-4-4) further validates robustness in electrically noisy environments.
SC431LC5SK-2TRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SC-74A, SOT-753
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SC431LC5SK-2TRT FAQ
1.How can I place an order for SC431LC5SK-2TRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC431LC5SK-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 SC431LC5SK-2TRT reliable?
The price and inventory of SC431LC5SK-2TRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC431LC5SK-2TRT is usually 5 days.
3.What payment methods are accepted for SC431LC5SK-2TRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC431LC5SK-2TRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC431LC5SK-2TRT?
SC431LC5SK-2TRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC431LC5SK-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 SC431LC5SK-2TRT?
For technical support, including SC431LC5SK-2TRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC431LC5SK-2TRT requirements.
6.How does Aetrix verify that SC431LC5SK-2TRT is sourced from the original manufacturer or authorized distributors?
All SC431LC5SK-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 SC431LC5SK-2TRT meets industry standards.
7.What is the process for return or replacement of SC431LC5SK-2TRT?
All SC431LC5SK-2TRT units undergo pre-shipment inspection (PSI). If there is an issue with SC431LC5SK-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 SC431LC5SK-2TRT part is unused and in its original packaging.
Return procedure for SC431LC5SK-2TRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC431LC5SK-2TRT Tags
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