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Semtech Corporation SC431CS-1.TRT
- Part No.:
- SC431CS-1.TRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SC431CS-1.TRT.pdf
- Description:
- IC VREF SHUNT ADJ 1% 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
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Product details
Overview
SC431CS-1.TRT 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 SC431CS-1.TRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat VC response, DFN-6 package layout constraints, and compatibility with 22V bus systems requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The SC431CS-1.TRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly turns on the shunt path. 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 from −40°C to +125°C with stable clamping performance across temperature, exhibits only 130–600nA reverse leakage at 22V, and delivers 1120W peak pulse power handling-enabled by low 20mΩ dynamic resistance and optimized thermal path in its DFN-6 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without device conduction |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD interfaces |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds standard ESD immunity requirements for consumer and industrial connectors |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for VBus protection without signal integrity impact on DC/low-frequency power lines |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients |
Pinout & Package
SC431CS-1.TRT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required. All six terminals are electrically active: three parallel input pins and three parallel ground pins for low-inductance, high-current surge routing.
| 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 tied to protected line (e.g., USB PD VBus); all three required for full rated surge performance |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates design margin inflation needed with traditional TVS diodes |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - enables reliable operation in automotive cabins and industrial enclosures |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces IR drop and improves energy diversion efficiency during multi-cycle surges |
| High-energy surge rating | 1120W peak pulse power - supports repeated lightning-induced transients in outdoor IoT and metering applications |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the 20–22V VBus line in USB Type-C ports supporting up to 100W power delivery against ESD and surge events. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector to clamp overvoltage before it reaches the PD controller and power multiplexer. Use Value: Maintains 27.5–28V clamping across temperature and current-preventing false OVP trips and ensuring compliance with USB PD 3.1 VBus tolerance limits. | Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in programmable logic controllers and remote sensors exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary front-end protector absorbing IEC 61000-4-5 1kV/42Ω transients before they stress the load switch's internal FET gate oxide. Use Value: Limits voltage across load switch input to ≤28V, avoiding gate-source breakdown and enabling use of cost-optimized 30V-rated switches. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet Main Power Rail Protection |
Use Scenario: Securing 12–22V system rails in battery-powered IoT gateways subjected to ESD from human contact and induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Solid-state EOS suppressor replacing bulkier MOV+TVS stacks, providing faster response and no wear-out mechanism. Use Value: Delivers ±30kV ESD immunity and 40A surge handling in 1.6×1.6mm footprint-reducing PCB area by >60% versus discrete alternatives. | Use Scenario: Protecting the main 19.5V or 20V DC input rail of ultrabooks and 2-in-1 tablets against adapter plug/unplug transients and ESD from user ports. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power transient suppressor placed at board edge before DC-DC converters and battery charge management ICs. Use Value: Prevents latch-up or permanent damage in PMICs rated for 24V absolute maximum, using stable clamping independent of ambient temperature. |
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 and pinout; differs only in tape-and-reel packaging (3,000 pcs/reel vs. SC431CS-1.TRT's unspecified quantity) | No functional difference; same placement, layout, and thermal behavior | Select TDS2211P.C for volume production where reel size and traceability match factory SMT line requirements |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 30V clamping, smaller 0.65×0.65mm DFN-2 package | Targeted at CC/SBU lines-not suitable for 22V VBus due to insufficient surge rating and clamping margin | Use uClamp2411ZA only for auxiliary signal lines; SC431CS-1.TRT remains mandatory for main power rail protection |
Compared with TDS2211P.C, SC431CS-1.TRT offers identical protection performance but may differ in reel logistics; versus uClamp2411ZA, SC431CS-1.TRT provides 2× peak current capacity and 2.5V lower clamping-critical for safeguarding 24V-tolerant PD controllers under worst-case surge and temperature conditions.
Availability
SC431CS-1.TRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and guaranteed surge immunity compliance.
Supply support for SC431CS-1.TRT 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 SC431CS-1.TRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection applications demanding flat clamping and temperature stability.
FAQ
What is the maximum continuous operating voltage for SC431CS-1.TRT?
The SC431CS-1.TRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without entering conduction. This makes SC431CS-1.TRT suitable for 20V USB PD VBus and 24V-tolerant industrial power rails where sustained overvoltage is not expected.
Does SC431CS-1.TRT require a thermal pad on the PCB?
No, SC431CS-1.TRT does not require an exposed thermal pad. Its DFN-6 package dissipates surge energy through low-inductance GND and IN pin connections. Layout guidelines emphasize connecting all three GND pins (1–3) and all three IN pins (4–6) with short, wide traces and multiple vias to ground plane-no thermal pad or copper pour is specified in the official datasheet for SC431CS-1.TRT.
How does SC431CS-1.TRT achieve stable clamping voltage across temperature?
SC431CS-1.TRT achieves stable clamping via its FET-based architecture: the trigger circuit activates a low-RDS(on) shunt FET whose on-resistance decreases with increasing current, counteracting voltage rise. As confirmed in datasheet Figure 3, SC431CS-1.TRT maintains 27.5–28V clamping from −40°C to +125°C-unlike TVS diodes whose VC rises with temperature.
Can SC431CS-1.TRT be used to protect high-speed data lines like USB SS or PCIe?
No, SC431CS-1.TRT is not intended for high-speed data lines. With 175pF junction capacitance, it would severely degrade signal integrity on superspeed lanes. SC431CS-1.TRT is designed exclusively for power or low-frequency I/O lines (e.g., VBus, CC, SBU, load switch inputs). For USB SS or DP/DM lines, Semtech recommends RClamp3371ZC (<0.25pF) instead of SC431CS-1.TRT.
What is the peak pulse power rating of SC431CS-1.TRT and how is it derived?
The SC431CS-1.TRT is rated for 1120W peak pulse power, calculated as VC × IPP = 28V × 40A under the 8/20μs waveform. This value is validated per IEC 61000-4-5 and reflects the device's ability to absorb single-event surges without degradation-critical for protecting sensitive 24V-rated PMICs and PD controllers in SC431CS-1.TRT-based designs.
SC431CS-1.TRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.495V
- Voltage - Output (Max):
- 30 V
- Current - Output:
- 130 µA
- Tolerance:
- ±1%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 150 mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SC431CS-1.TRT FAQ
1.How can I place an order for SC431CS-1.TRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC431CS-1.TRT 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 SC431CS-1.TRT reliable?
The price and inventory of SC431CS-1.TRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC431CS-1.TRT is usually 5 days.
3.What payment methods are accepted for SC431CS-1.TRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC431CS-1.TRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC431CS-1.TRT?
SC431CS-1.TRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC431CS-1.TRT 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 SC431CS-1.TRT?
For technical support, including SC431CS-1.TRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC431CS-1.TRT requirements.
6.How does Aetrix verify that SC431CS-1.TRT is sourced from the original manufacturer or authorized distributors?
All SC431CS-1.TRT 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 SC431CS-1.TRT meets industry standards.
7.What is the process for return or replacement of SC431CS-1.TRT?
All SC431CS-1.TRT units undergo pre-shipment inspection (PSI). If there is an issue with SC431CS-1.TRT, 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 SC431CS-1.TRT part is unused and in its original packaging.
Return procedure for SC431CS-1.TRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC431CS-1.TRT Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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