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Semtech Corporation SMS05.TCT
- Part No.:
- SMS05.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
SMS05.TCT.pdf
- Description:
- TVS DIODE 5VWM 14.5VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:11,031
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Product details
Overview
SMS05.TCT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 22V voltage buses or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and near-constant 27.5–28V clamping across temperature and current range-used in USB Type-C PD input protection and industrial load switch inputs.
For engineers reviewing the SMS05.TCT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping behavior vs. conventional TVS, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment.
Technical Context
The SMS05.TCT uses a surge-rated FET as its main protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike standard TVS diodes, its clamping voltage remains stable due to decreasing RDS(on) under surge, not fixed dynamic resistance.
It operates over −40°C to +125°C with 22V reverse stand-off voltage, 27.9V max breakdown, and 20mΩ dynamic resistance (8/20μs), enabling robust protection where thermal drift and current-dependent clamping degrade traditional solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - exceeds Level 4 requirements for handheld and portable electronics interfaces. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Line Surge Class 3 (±1kV, RS=42Ω) for industrial power inputs. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection but not suitable for high-speed data lines. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping curve; critical for maintaining consistent protection margin across temperature and current. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to maximize current sharing and minimize inductance. |
| 4, 5, 6 | IN | Protected line input; tied together to handle full 40A surge; requires direct trace routing from connector to device. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables <28V clamping at 40A with <0.1Ω effective RDS(on), eliminating current-dependent voltage rise seen in TVS diodes. |
| Stable clamping over temperature | Clamping voltage varies ≤0.5V from −40°C to +125°C - avoids derating at elevated ambient temperatures. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - ensures minimal IR drop during surge, preserving protection margin. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated surges in industrial environments without degradation. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector to clamp lightning-induced surges before reaching PD controller and e-fuse. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to 24V-rated PD ICs where conventional TVS would exceed 35V. | Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Primary EOS barrier absorbing 8/20μs surges from long cable runs or inductive switching transients. Use Value: Limits voltage across internal FET gate oxide to safe levels (<30V), avoiding catastrophic failure during ±1kV IEC 61000-4-5 events. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet 22V System Bus Protection |
Use Scenario: Securing 22V auxiliary rails powering cellular modems or sensor hubs in battery-backed field devices. IC Role / Device Role / Timing Role: Standalone surge protector on unregulated DC input, replacing bulkier MOV+TVS stacks. Use Value: 1.6×1.6mm DFN footprint saves >60% board area vs. discrete TVS+capacitor solutions while delivering higher IPP. | Use Scenario: Protecting 22V system power domains in ultrabooks and 2-in-1 tablets with compact form factors. IC Role / Device Role / Timing Role: Secondary-level protection after front-end fuse, guarding against ESD coupling from chassis or docking connectors. Use Value: ±30kV ESD immunity ensures compliance with IEC 61000-4-2 Level 4 without requiring additional shielding or layout guard rings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same manufacturer, identical electrical specs and DFN-6 package; SMS05.TCT is Semtech's alternate marking for TDS2211P per official ordering documentation. | No functional difference; used interchangeably in BOMs for USB PD and industrial designs. | Select SMS05.TCT when sourcing from Aetrix Electronics; identical performance and qualification. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP, 0.25pF capacitance - optimized for CC/SBU lines, not power rails. | Designed for low-capacitance signal-line protection, not 22V bus clamping; unsuitable for 40A surge duty. | Use only for auxiliary control lines; not a replacement for SMS05.TCT in power rail roles. |
Compared with TDS2211P (identical part), SMS05.TCT offers identical 22V/40A/28V clamping performance in the same DFN-6 package; uClamp2411ZA serves different signal-integrity-critical roles and cannot substitute for power-rail surge suppression.
Availability
SMS05.TCT 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, full traceability, and lifecycle continuity.
Supply support for SMS05.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 ICs for precision sensing, protection, and connectivity.
The TDS family-including SMS05.TCT-is engineered specifically for high-energy EOS protection in 22V–36V systems, addressing limitations of conventional TVS diodes in USB PD, industrial automation, and ruggedized computing.
FAQ
What is the exact function of SMS05.TCT in a circuit?
SMS05.TCT functions as a transient diverting suppressor that activates a precision-triggered shunt FET to clamp voltage surges on 22V power or I/O lines. It diverts up to 40A (8/20μs) away from sensitive downstream components while maintaining a stable 27.5–28V clamping voltage-unlike TVS diodes whose clamping rises with current and temperature. SMS05.TCT is not a passive diode but an active protection IC with integrated trigger and drive circuitry.
Is SMS05.TCT pin-compatible with standard TVS diodes in DFN-6 packages?
No-SMS05.TCT has a unique 3-pin input / 3-pin ground configuration (pins 4–6 = IN, pins 1–3 = GND), requiring dedicated PCB layout with parallel trace routing and multi-via grounding. Standard unidirectional TVS diodes in DFN-6 typically use anode/cathode/gnd or bidirectional center-tap arrangements. SMS05.TCT's pinout and internal FET architecture demand specific layout per Semtech's Figure 7 guidelines.
What is the maximum operating temperature for SMS05.TCT?
SMS05.TCT is rated for continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage remains stable within 0.5V across this full range, and junction temperature is specified up to +150°C. This makes SMS05.TCT suitable for under-hood automotive modules, industrial PLCs, and thermally constrained notebook power domains where conventional TVS devices exhibit significant clamping voltage drift.
Can SMS05.TCT be used on high-speed data lines like USB SuperSpeed or PCIe?
No-SMS05.TCT has 175pF junction capacitance at 22V, which would severely degrade signal integrity on high-speed differential pairs. It is intended exclusively for 22V power rails, VBus, load switch inputs, and other low-frequency, high-energy protection points. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (0.25pF) instead of SMS05.TCT.
How does SMS05.TCT differ from a standard TVS diode in surge response?
SMS05.TCT uses a triggered FET shunt with <20mΩ dynamic resistance, yielding flat clamping (27.5–28V) across 1–40A and −40°C to +125°C. A standard TVS diode relies on fixed-junction dynamic resistance, causing clamping voltage to rise linearly with current (VC = VBR + IPP × RDYN) and increase significantly with temperature. SMS05.TCT's architecture eliminates both dependencies, delivering predictable protection margins where TVS devices fail.
SMS05.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-23-6
- Series:
- SMS
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 24A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 325pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
SMS05.TCT FAQ
1.How can I place an order for SMS05.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMS05.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 SMS05.TCT reliable?
The price and inventory of SMS05.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMS05.TCT is usually 5 days.
3.What payment methods are accepted for SMS05.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMS05.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMS05.TCT?
SMS05.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMS05.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 SMS05.TCT?
For technical support, including SMS05.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMS05.TCT requirements.
6.How does Aetrix verify that SMS05.TCT is sourced from the original manufacturer or authorized distributors?
All SMS05.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 SMS05.TCT meets industry standards.
7.What is the process for return or replacement of SMS05.TCT?
All SMS05.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SMS05.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 SMS05.TCT part is unused and in its original packaging.
Return procedure for SMS05.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMS05.TCT Tags
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