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Semtech Corporation SD24C.TCT
- Part No.:
- SD24C.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD24C.TCT.pdf
- Description:
- TVS DIODE 24VWM 44VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:17,642
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Product details
Overview
SD24C.TCT from Semtech is a transient diverting suppressor 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), and stable 27.5–28V clamping across full current and temperature range (−40°C to +125°C). It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces using a surge-rated FET shunt architecture.
For engineers reviewing the SD24C.TCT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping behavior under surge conditions, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The SD24C.TCT employs a precision-triggered, surge-rated MOSFET as its primary protection element - not a conventional TVS diode - enabling near-constant clamping voltage independent of peak pulse current magnitude or ambient temperature. Its trigger circuit activates the FET when transient voltage exceeds ~27.9V breakdown, establishing a low-RDS(on) shunt path to ground.
Unlike standard TVS devices whose clamping voltage rises linearly with IPP (VC = VBR + IPP × RDYN), the SD24C.TCT maintains ≤28V clamping from 24A to 40A (1.2/50μs + 8/20μs combo wave) and across −40°C to +125°C, with dynamic resistance of only 20mΩ and junction capacitance of 175pF at 22V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 industrial surge immunity requirements. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards for connector-facing protection. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact; not suitable for high-speed data lines. |
| Dynamic Resistance | 20mΩ - enables flat clamping response by minimizing voltage rise across FET conduction path during high-current transients. |
| Operating Temperature | −40°C to +125°C - guarantees stable clamping performance in extended industrial and automotive under-hood environments. |
Pinout & Package
SD24C.TCT is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6mm × 1.6mm × 0.55mm with six terminals. The compact footprint enables placement directly at connectors or load switch inputs with minimal PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected with low-inductance vias to maximize 40A handling capability. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB-C); parallel connection of all three pins reduces trace inductance and distributes current evenly during surge. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Replaces traditional TVS diodes with a triggered MOSFET, delivering flat clamping voltage unaffected by temperature or pulse amplitude. |
| Stable clamping over temperature | Clamping remains ≤28V from −40°C to +125°C - eliminates derating concerns common with silicon TVS devices. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) enables protection against lightning-induced surges per IEC 61000-4-5. |
| Low dynamic resistance | 20mΩ measured between 1A–40A pulses ensures minimal voltage overshoot during fast-rising transients. |
| DFN-6 space efficiency | 1.6mm × 1.6mm footprint saves >50% board area versus SO-8 or SOT-23 TVS solutions rated for comparable surge energy. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles supporting up to 100W PD, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and PD controller or load switch. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to 24V-rated PD controllers where conventional TVS would exceed 38V. |
Use Scenario: Shielding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Surge shunt device that diverts transient energy before it reaches the load switch's internal FET gate or drain. Use Value: Limits clamping voltage below the load switch's absolute maximum ratings (e.g., <30V), preventing latch-up or permanent gate oxide failure during 1kV/42Ω surges. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-backed smart sensors, edge gateways, and cellular IoT modules deployed in electrically noisy environments. IC Role / Device Role / Timing Role: Standalone EOS protector on main power input, upstream of DC-DC converters and PMICs. Use Value: Delivers ±30kV ESD immunity and 40A surge handling while consuming only 600nA leakage at 22V - preserves battery life in always-on applications. |
Use Scenario: Safeguarding 22V backup supplies in NVMe SSDs, enterprise HDDs, and RAID controllers subject to hot-plug transients and board-level ESD. IC Role / Device Role / Timing Role: Secondary overvoltage clamp on non-data power paths, complementing low-capacitance TVS on high-speed lanes. Use Value: Provides robust 27.5–28V clamping with 175pF capacitance - avoids resonance or signal distortion on power rails while meeting IEC 61000-4-5 compliance. |
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, identical marking (T22), and shared Semtech datasheet Rev 2.5 - confirmed pin-to-pin and functional replacement. | No difference; qualified for identical USB PD, load switch, and industrial use cases per Semtech documentation. | Select TDS2211P.C when requiring direct Semtech-sourced traceability and same-date-code availability as SD24C.TCT. |
| uClamp2411ZA.TCT | 24V working voltage, ±30kV ESD, but lower 20A IPP rating and higher 33V clamping at 20A - uses silicon TVS architecture, not FET-based shunt. | Suitable for CC/SBU lines in USB-C, not VBUS; lacks flat clamping and thermal stability of SD24C.TCT. | Choose uClamp2411ZA.TCT only for lower-energy signal-line protection where 22V bus-level surge immunity is not required. |
Compared with SD24C.TCT, TDS2211P.C offers identical performance and drop-in compatibility, while uClamp2411ZA.TCT provides lower-cost TVS protection for non-power lines but cannot replace SD24C.TCT in 40A, 22V bus applications due to inferior clamping stability and surge rating.
Availability
SD24C.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device 22V power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.
Supply support for SD24C.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 applications.
The SD24C.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered specifically to replace conventional TVS diodes in high-voltage, high-energy EOS protection scenarios where stable clamping and temperature resilience are critical.
FAQ
What is the maximum continuous operating voltage for SD24C.TCT?
The SD24C.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC on the protected line without significant leakage or conduction. This makes SD24C.TCT suitable for 20–22V USB PD VBUS and industrial 24V nominal rails where transient suppression is needed without interfering with normal operation.
Does SD24C.TCT provide protection against IEC 61000-4-5 surge events?
Yes, SD24C.TCT is rated for 40A peak pulse current with an 8/20μs waveform and meets ±1kV surge immunity (1.2/50μs voltage + 8/20μs current combo wave, RS = 42Ω), satisfying IEC 61000-4-5 Level 4 requirements. Its 27.5–28V clamping ensures downstream components remain within safe voltage limits during such events.
How does SD24C.TCT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes - whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN) and degrades with temperature - SD24C.TCT uses a triggered FET shunt to maintain ≤28V clamping from 24A to 40A and across −40°C to +125°C, eliminating design derating uncertainty.
Can SD24C.TCT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SD24C.TCT is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V would severely degrade signal integrity on differential pairs. It is intended exclusively for power or low-frequency I/O lines; for USB SS, DP/DM, or PCIe, low-capacitance TVS devices like RClamp3371ZC (<0.25pF) must be used instead of SD24C.TCT.
What is the recommended PCB layout for optimal performance of SD24C.TCT?
Place SD24C.TCT as close as possible to the protected connector. Connect all three IN pins (4, 5, 6) via a single short, wide trace to minimize inductance, and tie all three GND pins (1, 2, 3) directly to a solid ground plane using multiple vias. Avoid thermal pads - energy is dissipated internally, and excessive copper under the package adds parasitic inductance.
SD24C.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SC-76, SOD-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 350W
- 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:
- SOD-323
SD24C.TCT FAQ
1.How can I place an order for SD24C.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SD24C.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 SD24C.TCT reliable?
The price and inventory of SD24C.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD24C.TCT is usually 5 days.
3.What payment methods are accepted for SD24C.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD24C.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD24C.TCT?
SD24C.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD24C.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 SD24C.TCT?
For technical support, including SD24C.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD24C.TCT requirements.
6.How does Aetrix verify that SD24C.TCT is sourced from the original manufacturer or authorized distributors?
All SD24C.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 SD24C.TCT meets industry standards.
7.What is the process for return or replacement of SD24C.TCT?
All SD24C.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SD24C.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 SD24C.TCT part is unused and in its original packaging.
Return procedure for SD24C.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD24C.TCT Tags
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