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Semtech Corporation SM15.TCT
- Part No.:
- SM15.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SM15.TCT.pdf
- Description:
- TVS DIODE 15VWM 24VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,729
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD bus protection and industrial load switch input stages.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, low 175pF junction capacitance at 22V, and compatibility with 22V working voltage systems requiring robust EOS resilience beyond standard TVS diodes.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under surge, not fixed dynamic resistance.
It operates across –40°C to +125°C with <20mΩ dynamic resistance (8/20μs), 1120W peak pulse power rating, and reverse leakage ≤600nA at 22V - enabling reliable protection in thermally demanding industrial and mobile applications without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail tolerances without overvoltage stress. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - stays within safe margin below typical 30V+ IC damage thresholds. |
| 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 Class 4 requirements for handheld and connector-facing designs. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power-line protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping behavior and minimizes voltage overshoot during fast-rising transients. |
| Package | DFN 1.6 × 1.6 × 0.55 mm, 6-lead - supports ultra-compact PCB layouts near connectors with minimal parasitic inductance. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current sharing and minimize inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch input); parallel connection ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A surge - eliminates need for oversized IPP margining in thermal design. |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction - avoids thermal runaway and improves lifetime reliability. |
| Temperature-stable clamping | Clamps at ~27.6V across –40°C to +125°C - enables single-part qualification across automotive-grade ambient ranges. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces voltage overshoot during sub-100ns ESD events and improves system-level immunity margin. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz bursts) - protects against repetitive switching noise in motor drives and PLC I/O modules. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V USB PD VBUS lines from lightning-induced surges and hot-plug ESD events in portable docking stations and power adapters. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at Type-C connector, shunting surge current to ground before reaching PD controller or DC-DC stage. Use Value: Maintains 27.6V clamping at 40A and 125°C - prevents overvoltage damage to 30V-rated PD controllers where standard TVS would exceed 38V at same conditions. |
Use Scenario: Safeguarding input terminals of industrial e-fuses and load switches (e.g., HS2950P) exposed to field wiring transients in remote meters and robotics. IC Role / Device Role / Timing Role: Primary front-end EOS protector on VIN rail, limiting transient voltage seen by internal FET gate oxide and overvoltage protection circuitry. Use Value: Clamping stability ensures load switch remains within safe operating area (SOA) during 1.2/50μs surges - avoids false OVP trips or permanent gate damage. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways subjected to ESD during field servicing and conducted surges via long sensor cables. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing bulkier MOV/TVS stacks, integrated into compact 2-layer PCBs with minimal layout overhead. Use Value: 175pF capacitance and DFN footprint enable placement within 3mm of connector - critical for passing IEC 61000-4-2 system-level ESD tests without trace resonance. |
Use Scenario: Protecting 22V backup power inputs in NVMe SSDs and enterprise storage controllers against power-rail EOS during hot-swap events or supply coupling. IC Role / Device Role / Timing Role: High-energy clamping device on backup VCC line, coordinated with low-capacitance TVS on data lanes (e.g., RClamp3371ZC). Use Value: 1120W peak pulse power rating handles stored energy discharge from large decoupling caps - prevents latch-up or burnout during sustained 22V overvoltage faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 35.1V clamping at 22.5A (8/20μs), higher dynamic resistance (~0.5Ω), no temperature-stable clamping. | Limited to lower-energy surges; clamping rises to >40V at 125°C - unsuitable for 30V-margin systems in hot environments. | Use only where cost is primary constraint and thermal derating is acceptable; requires larger PCB area and higher IPP margining. |
| SP1003-220K | Bi-directional polymer ESD suppressor; 22V working voltage, but rated only for 12A (8/20μs), 300W peak power, and ±15kV ESD. | Designed for board-level ESD only; cannot meet IEC 61000-4-5 surge standards - insufficient for industrial or USB PD line protection. | Select only for low-energy, high-capacitance-tolerant data-line protection; not a functional substitute for TDS2211P's 40A surge capability. |
Compared with SMAJ22A and SP1003-220K, the TDS2211P delivers superior surge resilience through FET-based constant-clamp operation, enabling reliable 22V system protection at full 40A rating across industrial temperature range - where alternatives require significant design compromises in clamping margin, thermal stability, or surge compliance.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for TDS2211P 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 ICs for precision sensing, protection, and signal integrity.
The TDS family was developed to replace conventional TVS diodes in high-reliability 20–30V power and interface protection, delivering stable clamping and superior surge endurance using active FET-based architecture.
FAQ
What is the maximum clamping voltage of the TDS2211P under full-rated surge conditions?
The TDS2211P clamps at 27.6V (typical) and 28V (max) when subjected to 40A peak pulse current (8/20μs + 1.2/50μs combination waveform, RS = 2Ω), as specified in the Electrical Characteristics table. This value holds across –40°C to +125°C, making it significantly more stable than TVS diodes whose clamping rises with temperature and current. The TDS2211P maintains this performance due to its FET-based shunt architecture.
Can the TDS2211P be used to protect bidirectional signal lines like USB DP/DM?
No - the TDS2211P is designed exclusively for unidirectional 22V power-line or I/O protection (e.g., VBUS, load switch input). Its internal architecture connects pins 4–6 to pins 1–3 in one direction only. For bidirectional high-speed data lines such as USB DP/DM, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF), which are explicitly characterized for signal integrity preservation. The TDS2211P is not rated or validated for differential or AC-coupled signal paths.
How does the TDS2211P differ from standard TVS diodes in terms of surge energy handling?
The TDS2211P handles 1120W peak pulse power (at 40A, 8/20μs) by dissipating surge energy in the low-RDS(on) channel of a surge-rated FET, not in a PN junction. This avoids thermal runaway and enables consistent clamping. In contrast, standard TVS diodes rely on junction-area-limited avalanche conduction, causing clamping voltage to rise linearly with current and degrade sharply above 85°C. The TDS2211P's 20mΩ dynamic resistance and flat clamping curve make it uniquely suited for high-reliability 22V industrial and USB PD applications.
Is the TDS2211P RoHS compliant and halogen free?
Yes - the TDS2211P is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and the lead finish is lead-free. Marking code "T22" with date code appears on the top surface, and the device ships in tape-and-reel format (3,000 units per 7-inch reel), as confirmed in the official Semtech datasheet Rev 2.5.
What is the recommended PCB layout for optimal performance of the TDS2211P?
Place the TDS2211P as close as possible to the protected connector or entry point. Connect all three IN pins (4, 5, 6) together with a short, wide trace to the protected line, 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. Do not isolate GND pins or route traces beneath the device. These guidelines minimize parasitic inductance and ensure full 40A surge capability, as detailed in Figure 7 of the TDS2211P datasheet.
SM15.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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 100pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SM15.TCT FAQ
1.How can I place an order for SM15.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15.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 SM15.TCT reliable?
The price and inventory of SM15.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15.TCT is usually 5 days.
3.What payment methods are accepted for SM15.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15.TCT?
SM15.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15.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 SM15.TCT?
For technical support, including SM15.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15.TCT requirements.
6.How does Aetrix verify that SM15.TCT is sourced from the original manufacturer or authorized distributors?
All SM15.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 SM15.TCT meets industry standards.
7.What is the process for return or replacement of SM15.TCT?
All SM15.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SM15.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 SM15.TCT part is unused and in its original packaging.
Return procedure for SM15.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15.TCT Tags
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