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Semtech Corporation SDC36B.TCT
- Part No.:
- SDC36B.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SDC36B.TCT.pdf
- Description:
- TVS DIODE 33VWM 47VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,923
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Product details
Overview
SDC36B.TCT 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 a stable 27.5–28V clamping voltage across temperature and current range. Used in USB Type-C PD input protection and load switch front-end safeguarding.
For engineers reviewing the SDC36B.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with industrial and portable power delivery systems requiring robust EOS resilience.
Technical Context
The SDC36B.TCT employs a surge-rated FET as its primary shunt element, activated by an integrated precision trigger circuit that responds to overvoltage transients above ~25V breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to ultra-low dynamic resistance (20mΩ) and decreasing RDS(on) under increasing surge current.
It operates across –40°C to +125°C with <600nA reverse leakage at 22V, 175pF capacitance at 1MHz/22V, and is rated for 1120W peak pulse power. The device protects one line using a symmetrical 3-pin input / 3-pin ground configuration in a 1.6mm × 1.6mm DFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage before triggering |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs see ≤28V during worst-case surge |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB/Type-C ESD requirements |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 20V power rail protection without signal distortion |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimal VC rise vs. current |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables compact placement near connectors |
Pinout & Package
SDC36B.TCT uses a Pb-free, RoHS-compliant 6-lead DFN package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad not required-energy is dissipated in the FET channel, not the junction. All pins must be soldered: three GND pins (1–3) and three IN pins (4–6) are paralleled internally for optimal surge current sharing and low-inductance grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three must be connected to minimize parasitic inductance during 40A surge |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected line; equal current sharing ensures full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A surge - eliminates design margin inflation needed with TVS diodes |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction - enables higher IPP and lower thermal stress |
| Temperature-stable clamping | Clamps at ~27.6V from –40°C to +125°C - removes derating uncertainty in industrial ambient conditions |
| Low dynamic resistance | 20mΩ measured between 1A–40A - directly enables flat VC vs. IPP curve per datasheet Figure 3 |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor drives and PLCs |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
|
Use Scenario: Protecting VBus lines in USB-C PD controllers operating up to 20V nominal, exposed to lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller input, clamping transients before they reach sensitive analog/digital circuitry. Use Value: Maintains 27.6V clamping at 40A and 125°C - prevents controller latch-up or gate oxide damage where standard TVS would exceed 38V. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes subject to field-installed wiring surges. IC Role / Device Role / Timing Role: First-line transient diverter on VIN path, limiting voltage seen by internal FET's drain-source breakdown rating. Use Value: Keeps clamping voltage below 28V across full temperature range - avoids destructive avalanche in load switch MOSFET during 1kV/42Ω surge events. |
| Notebook/Tablet 22V Power Rail Protection | Industrial Equipment DC Power Input Protection |
|
Use Scenario: Securing main 20–22V system rails in portable computing devices against ESD from user interface ports and battery hot-swap events. IC Role / Device Role / Timing Role: Standalone EOS protector on main power distribution node, coordinated with low-capacitance TVS on high-speed data lanes. Use Value: 175pF capacitance avoids power rail resonance issues while delivering ±30kV ESD robustness - critical for thin-form-factor PCB layouts. |
Use Scenario: Hardening 24V DC input stages of programmable logic controllers, HMI panels, and factory automation sensors against induced surges on long cable runs. IC Role / Device Role / Timing Role: Surge-rated front-end clamp on unregulated DC input, upstream of DC-DC converters and LDOs. Use Value: 1120W peak pulse power rating and –40°C to +125°C operation ensure reliability in harsh cabinet environments without thermal derating. |
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, differing only in tape-and-reel packaging (3,000 pcs/reel vs. SDC36B.TCT's unspecified reel count) | No functional difference; both qualified for USB PD and industrial 22V rail protection | Select TDS2211P.C when standard Semtech reel quantity and marking (T22 + date code) are required |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP and higher 33V clamping at 20A - uses silicon avalanche diode, not FET-shunt architecture | Better suited for CC/SBU lines in USB-C; insufficient for 40A power rail protection | Use uClamp2411ZA only for auxiliary signal lines - not a direct replacement for SDC36B.TCT's power-line role |
Compared with TDS2211P.C, SDC36B.TCT shares identical protection performance and package but may differ in traceability or logistics coding; versus uClamp2411ZA, SDC36B.TCT provides 2× higher surge current handling and 5V lower clamping - making it the sole suitable choice for 22V power rail EOS defense.
Availability
SDC36B.TCT is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch inputs, and 22V notebook power rail protection requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SDC36B.TCT 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 power management, protection, and signal integrity.
The SDC36B.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping, temperature independence, and high IPP are critical.
FAQ
What is the maximum continuous operating voltage for SDC36B.TCT?
The SDC36B.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks voltages up to 22V DC in normal operation without triggering. This makes SDC36B.TCT appropriate for 20V USB PD buses and other 22V-rated power rails where sustained voltage must remain below the clamping threshold.
Does SDC36B.TCT require a thermal pad on the PCB?
No, SDC36B.TCT does not require a thermal pad. Its FET-based architecture dissipates surge energy in the channel rather than the junction, eliminating the need for enhanced thermal conduction. Layout guidelines emphasize low-inductance grounding via multiple vias to pins 1–3, not thermal mass under the package.
How does SDC36B.TCT achieve stable clamping voltage across temperature?
SDC36B.TCT maintains ~27.6V clamping from –40°C to +125°C because its shunt FET's RDS(on) decreases with rising current and temperature, counteracting typical TVS voltage drift. This behavior is confirmed in the datasheet's Figure 3 and "Clamping Voltage vs. Temperature" plot - a core differentiator of the TDS architecture.
Can SDC36B.TCT protect high-speed data lines like USB SuperSpeed?
No, SDC36B.TCT is not intended for high-speed data lines. With 175pF junction capacitance, it is optimized for power or low-frequency I/O protection. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); SDC36B.TCT should be used only on VBus, CC, or load switch inputs.
What is the pin configuration and recommended PCB layout for SDC36B.TCT?
SDC36B.TCT uses a 6-pin DFN with pins 1–3 as GND and pins 4–6 as IN. All three GND pins must connect to a solid ground plane via multiple vias; all three IN pins must tie to the protected line with a short, wide trace. Per datasheet Figure 7, placement within 5mm of the connector minimizes coupling - this layout is essential to achieve the rated 40A performance.
SDC36B.TCT 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
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V (Max)
- Voltage - Breakdown (Min):
- 35V
- Voltage - Clamping (Max) @ Ipp:
- 47V
- Current - Peak Pulse (10/1000µs):
- 4A (1.2/50µs)
- Power - Peak Pulse:
- 225W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 50pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SDC36B.TCT FAQ
1.How can I place an order for SDC36B.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDC36B.TCT 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 SDC36B.TCT reliable?
The price and inventory of SDC36B.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDC36B.TCT is usually 5 days.
3.What payment methods are accepted for SDC36B.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDC36B.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDC36B.TCT?
SDC36B.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDC36B.TCT 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 SDC36B.TCT?
For technical support, including SDC36B.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDC36B.TCT requirements.
6.How does Aetrix verify that SDC36B.TCT is sourced from the original manufacturer or authorized distributors?
All SDC36B.TCT 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 SDC36B.TCT meets industry standards.
7.What is the process for return or replacement of SDC36B.TCT?
All SDC36B.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SDC36B.TCT, 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 SDC36B.TCT part is unused and in its original packaging.
Return procedure for SDC36B.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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