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Semtech Corporation SC3203SETRC
- Part No.:
- SC3203SETRC
- Manufacturer:
- Semtech Corporation
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SC3203SETRC.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,058
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Product details
Overview
SC3203SETRC from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across its full current and temperature range (–40°C to +125°C). It is used in USB Type-C PD bus protection where low, temperature-invariant clamping prevents damage to voltage-sensitive controllers.
For engineers reviewing the SC3203SETRC datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under surge, dynamic resistance (<20 mΩ), junction capacitance (175 pF), and DFN 1.6×1.6mm 6-lead layout compatibility with high-density USB and industrial interfaces.
Technical Context
The SC3203SETRC 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 24A to 40A surge currents due to decreasing RDS(on) under load.
It operates over –40°C to +125°C with <20 mΩ dynamic resistance and 175 pF junction capacitance at 22V reverse bias. Its functional architecture isolates protection behavior from ambient temperature drift, enabling reliable performance in thermally demanding industrial and mobile applications without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - Matches nominal USB PD bus voltage and protects against sustained overvoltage up to rated standoff level. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - Remains stable across full surge range and temperature, limiting stress on downstream ICs. |
| Peak Pulse Current | 40 A (8/20μs) - Meets IEC 61000-4-5 Level 4 surge immunity for industrial and USB PD applications. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Provides robust handling during assembly, testing, and end-user operation. |
| Junction Capacitance | 175 pF at 22 V, 1 MHz - Low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20 mΩ - Enables low-voltage drop during conduction, minimizing energy dissipation and thermal rise. |
| Package | DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead - Enables ultra-compact placement near connectors with minimal PCB area. |
Pinout & Package
SC3203SETRC is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed pad not electrically connected. All six terminals are surface-mount; pins 1–3 are tied internally to GND, and pins 4–6 serve as the protected input node.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three must be soldered to maximize current sharing and minimize inductance. |
| 4, 5, 6 | IN | Protected line input; connected directly to VBus or power rail; all three pins conduct surge current in parallel. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V from 24A to 40A surge, eliminating need for over-spec'ing IPP to meet voltage thresholds. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction, reducing thermal stress and improving longevity. |
| Temperature-stable clamping | Clamps at 27.5–28 V from –40°C to +125°C - enables single BOM across wide-temperature industrial deployments. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz & 5 kHz) - protects against repetitive fast transients in motor drives and PLC environments. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the 20–22V VBus line in USB Type-C ports supporting Power Delivery negotiation and up to 100W delivery. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and PD controller or load switch, clamping surges before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping across temperature and current-prevents false shutdown or latch-up in PD controllers rated for ≤30V absolute max. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents permanent damage to load switch during lightning-induced surges or inductive kickback, extending field reliability. |
| IoT Edge Node Power Rail Protection | Storage Device DC Power Input Protection |
|
Use Scenario: Securing 22V-rated auxiliary power inputs on battery-backed IoT gateways and edge AI modules deployed outdoors or in uncontrolled environments. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input, operating independently of system MCU or PMIC supervision. Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint-enables compact, ruggedized designs without external heatsinking or layout compromises. |
Use Scenario: Protecting SATA or NVMe SSD power inputs subjected to hot-plug transients and board-level ESD during data center maintenance. IC Role / Device Role / Timing Role: Low-capacitance, high-power transient suppressor on +12V or +19V supply rails feeding storage controllers and flash memory arrays. Use Value: 175 pF capacitance avoids resonance with bulk input capacitors; stable clamping prevents data corruption or NAND write failure during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, pinout, and package; SC3203SETRC is Semtech's alternate marking for TDS2211P per official ordering documentation. | No functional difference; same use cases including USB PD, load switch, and industrial 22V rail protection. | Select based on distributor availability and reel size preference (TDS2211P.C = 3,000/reel; SC3203SETRC = tape-and-reel variant). |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 30V clamping, and smaller 0.6×0.6mm 2-lead package. | Better suited for CC/SBU lines in USB-C; insufficient for 22V VBus due to higher clamping and lower surge rating. | Not a direct alternative for SC3203SETRC's 22V power rail role-use only for auxiliary signal-line protection where lower capacitance (<0.5 pF) is critical. |
Compared with TDS2211P and uClamp2411ZA, SC3203SETRC offers identical protection performance to TDS2211P in a validated production marking, while uClamp2411ZA serves a different voltage/current class and cannot replace SC3203SETRC on 22V power rails without risking controller overvoltage.
Availability
SC3203SETRC is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SC3203SETRC 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.
SC3203SETRC belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace traditional TVS diodes in high-reliability 22V power and interface protection applications where clamping stability and surge endurance are critical.
FAQ
What is the exact package type and dimensions of SC3203SETRC?
SC3203SETRC uses a DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with six surface-mount terminals. Pins 1–3 are GND; pins 4–6 are the protected input node. The package is Pb-free, halogen-free, and RoHS/WEEE compliant with UL 94V-0 molding compound.
How does SC3203SETRC 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), SC3203SETRC maintains a near-constant 27.5–28V clamp from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on) under surge. This eliminates design margin uncertainty across temperature and current extremes.
Is SC3203SETRC suitable for protecting USB Type-C VBus lines operating at 20V?
Yes. SC3203SETRC has a 22V working voltage and clamps at 27.5–28V up to 40A, making it ideal for USB Type-C PD buses. Its stable clamping ensures PD controllers-typically rated ≤30V-are never exposed to damaging overvoltage, even at 125°C ambient or full surge current.
What is the maximum junction temperature and operating range for SC3203SETRC?
SC3203SETRC operates from –40°C to +125°C ambient, with junction temperature rated from –55°C to +150°C. Its clamping voltage and leakage current remain within specification across this full range, as verified in Semtech's characterization data for TDS2211P (identical to SC3203SETRC).
Can SC3203SETRC replace a standard 22V TVS diode on a 12V rail?
No. SC3203SETRC is optimized for 22V systems and has a 22V reverse stand-off voltage. Using it on a 12V rail risks premature conduction due to insufficient voltage margin-its minimum breakdown is 25V, leaving only ~13V headroom above 12V nominal. A dedicated 12V-rated suppressor such as SC1203SETRC should be used instead.
SC3203SETRC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- EcoSpeed®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 9V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.75V
- Voltage - Output (Max):
- 7.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SC3203SETRC FAQ
1.How can I place an order for SC3203SETRC through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3203SETRC 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 SC3203SETRC reliable?
The price and inventory of SC3203SETRC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3203SETRC is usually 5 days.
3.What payment methods are accepted for SC3203SETRC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3203SETRC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3203SETRC?
SC3203SETRC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3203SETRC 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 SC3203SETRC?
For technical support, including SC3203SETRC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3203SETRC requirements.
6.How does Aetrix verify that SC3203SETRC is sourced from the original manufacturer or authorized distributors?
All SC3203SETRC 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 SC3203SETRC meets industry standards.
7.What is the process for return or replacement of SC3203SETRC?
All SC3203SETRC units undergo pre-shipment inspection (PSI). If there is an issue with SC3203SETRC, 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 SC3203SETRC part is unused and in its original packaging.
Return procedure for SC3203SETRC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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