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Semtech Corporation SD15C.TCT
- Part No.:
- SD15C.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD15C.TCT.pdf
- Description:
- TVS DIODE 15VWM 29VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:89,126
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Product details
Overview
SD15C.TCT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 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 temperature and current range. It protects USB Type-C VBus, load switch inputs, and industrial power rails where low, flat clamping voltage is critical to avoid controller damage.
For engineers reviewing the SD15C.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability over 40A surge current, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with USB PD 20V+ bus architectures requiring robust EOS hardening without thermal derating penalties.
Technical Context
The SD15C.TCT uses a surge-rated FET as its primary shunt element, activated by a precision trigger circuit that turns on the FET when transient voltage exceeds breakdown - enabling near-constant clamping voltage independent of peak current magnitude. Unlike conventional TVS diodes, its dynamic resistance remains ~20mΩ across 1–40A (8/20μs), eliminating linear VC = VBR + IPP×RDYN drift.
It operates from −40°C to +125°C with <600nA reverse leakage at 22V, maintains 27.5–28V clamping at both 24A and 40A (1.2/50μs + 8/20μs combo waveform, RS = 2Ω), and delivers 1120W peak pulse power. Its functional architecture isolates protection energy dissipation in the FET channel rather than the junction, avoiding temperature-dependent clamping rise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream ICs (e.g., USB PD controllers) remain below absolute max ratings during worst-case surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for VBus protection without signal integrity impact; higher than data-line TVS but appropriate for power rail use. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 ESD immunity for handheld and industrial interfaces exposed to user handling. |
| Dynamic Resistance | 20mΩ (1–40A, 8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Operating Temp. | −40°C to +125°C - supports automotive under-hood, industrial control, and high-ambient IoT deployments without clamping voltage drift. |
Pinout & Package
SD15C.TCT is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). The compact footprint saves >50% board area versus SOT-23 or SOIC alternatives while supporting high-current routing via parallel pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected with low-inductance vias to maximize 40A capability and minimize ground bounce. |
| 4, 5, 6 | IN | Protected line input (e.g., VBus); pins are internally paralleled - single trace connection required, but all three pins must be routed to ensure full surge rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables constant clamping voltage across full 1–40A surge range - eliminates design margin inflation needed with traditional TVS diodes. |
| 20mΩ dynamic resistance | Reduces voltage overshoot during sub-100ns EFT bursts and ensures predictable clamping even at elevated ambient temperatures. |
| 175pF junction capacitance | Optimized for power-line protection: low enough to avoid regulator instability or ripple coupling, high enough to sustain robust ESD energy absorption. |
| −40°C to +125°C operation | Validated clamping stability across full range - no derating required for industrial or automotive under-hood applications. |
| UL 94V-0 molding compound | Ensures flame-retardant reliability in enclosed equipment and high-density PCB assemblies subject to thermal stress. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBus lines in USB-C receptacles against lightning-induced surges, hot-plug transients, and ESD events during cable insertion. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed immediately adjacent to connector, clamping transients before they reach PD controller or buck converter. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to USB PD PHYs rated for ≤30V absolute max, unlike TVS diodes whose clamping rises to >38V at same conditions. |
Use Scenario: Hardening enable or input rails of industrial-grade load switches (e.g., HS2950P) against 1kV/42Ω surges per IEC 61000-4-5 in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient clamp on VIN pin, limiting gate-source and drain-source overvoltage during surge to preserve internal FET integrity. Use Value: Prevents latch-up or permanent failure of load switch MOSFETs by holding clamping voltage well below their 30V VDS(max) and 20V VGS(max) limits under worst-case surge. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet VBus Line Protection |
|
Use Scenario: Securing 22V auxiliary power inputs in battery-powered IoT gateways exposed to field ESD and induced surges in factory or outdoor environments. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input, coordinated with upstream fuse and downstream LDO to form complete overvoltage survival chain. Use Value: Delivers 1120W peak power handling in 1.6mm² footprint - enables compact, fanless enclosures without sacrificing surge immunity compliance. |
Use Scenario: Safeguarding USB-C VBus lines in ultrabooks and tablets where space constraints prohibit larger TVS arrays and thermal management is limited. IC Role / Device Role / Timing Role: Single-component solution replacing multi-diode TVS stacks, reducing BOM count and PCB real estate while improving clamping consistency. Use Value: Eliminates need for derating at high ambient temperatures - ensures reliable 28V clamping during sustained CPU/GPU thermal throttling scenarios where junction temp exceeds 100°C. |
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 qualification - differs only in reel packaging (3,000 pcs vs. SD15C.TCT's unspecified quantity). | Same USB PD, load switch, and industrial power rail use cases; validated in Semtech reference designs including Figure 4 and Figure 5. | Select TDS2211P.C when standard tape-and-reel volume ordering is required; SD15C.TCT may reflect alternate distribution channel or legacy marking variant. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, 0.25pF capacitance - optimized for CC/SBU data lines, not power rails; lacks FET-based flat-clamp architecture. | Intended for low-capacitance signaling lines (CC, SBU), not VBus or load switch inputs; unsuitable for 40A surge handling or 22V continuous operation. | Use uClamp2411ZA only for auxiliary signal lines; SD15C.TCT remains mandatory for primary power rail protection due to superior energy handling and clamping stability. |
Compared with TDS2211P.C, SD15C.TCT offers identical protection performance and package, differing only in orderable part suffix; versus uClamp2411ZA, SD15C.TCT provides 67% higher peak current rating, 700× higher capacitance appropriate for power rails, and true flat-clamp behavior essential for 22V system reliability.
Availability
SD15C.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for SD15C.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 analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The SD15C.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability power rail protection where flat clamping, temperature stability, and high surge endurance are non-negotiable.
FAQ
What is the maximum continuous operating voltage for SD15C.TCT?
The SD15C.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously withstand up to 22V DC or RMS on its IN pins without significant leakage or conduction. This makes SD15C.TCT suitable for protecting 20V USB PD VBus lines and other 22V-rated power rails where long-term reliability under nominal voltage is required.
Does SD15C.TCT require a thermal pad on the PCB?
No, SD15C.TCT does not require a thermal pad. Its DFN-6 package dissipates surge energy primarily through the copper traces connected to pins 1–3 (GND) and 4–6 (IN), and the datasheet explicitly states "no thermal pad is needed" because transient energy is handled by the FET channel rather than junction heating. Proper layout with multiple ground vias and short, wide traces is sufficient for full 40A rating.
How does SD15C.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), SD15C.TCT uses a triggered FET to maintain nearly constant clamping - 27.5–28V across 1–40A and −40°C to +125°C. This eliminates the need to overspecify IPP to meet voltage thresholds, making SD15C.TCT more predictable and robust in thermally demanding applications.
Can SD15C.TCT be used on high-speed data lines like USB SuperSpeed?
No, SD15C.TCT is not suitable for USB SuperSpeed (TX/RX) or other high-speed data lines. With 175pF junction capacitance, it would severely degrade signal integrity. SD15C.TCT is specifically designed for power rails and low-frequency I/O lines; for data lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), as referenced in the TDS2211P application notes.
What is the pin configuration and recommended PCB layout for SD15C.TCT?
SD15C.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, and all three IN pins must tie to a single low-inductance trace from the protected connector. Per Semtech's layout guidance, SD15C.TCT must be placed within 2mm of the connector to minimize parasitic inductance and prevent transient coupling to adjacent nets.
SD15C.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):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 29V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 75pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD15C.TCT FAQ
1.How can I place an order for SD15C.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SD15C.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 SD15C.TCT reliable?
The price and inventory of SD15C.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD15C.TCT is usually 5 days.
3.What payment methods are accepted for SD15C.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD15C.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD15C.TCT?
SD15C.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD15C.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 SD15C.TCT?
For technical support, including SD15C.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD15C.TCT requirements.
6.How does Aetrix verify that SD15C.TCT is sourced from the original manufacturer or authorized distributors?
All SD15C.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 SD15C.TCT meets industry standards.
7.What is the process for return or replacement of SD15C.TCT?
All SD15C.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SD15C.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 SD15C.TCT part is unused and in its original packaging.
Return procedure for SD15C.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD15C.TCT Tags
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