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Semtech Corporation SM05.TCT
- Part No.:
- SM05.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SM05.TCT.pdf
- Description:
- TVS DIODE 5VWM 9.8VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:99,688
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Product details
Overview
SM05.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), 27.5–28V clamping voltage at 40A, and ultra-low 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial IoT interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the SM05.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp behavior across –40°C to +125°C, DFN 1.6×1.6mm 6-lead package with triple parallel input/ground terminals, and FET-based shunt architecture enabling superior surge handling versus conventional TVS diodes.
Technical Context
The SM05.TCT uses a precision-triggered surge-rated FET as its primary protection element, activated by a voltage-controlled trigger circuit when transient voltage exceeds breakdown. Unlike standard TVS diodes, its clamping voltage remains nearly constant-27.5–28V-across 24A to 40A peak pulse current and over full operating temperature (–40°C to +125°C).
This stability arises from the FET's decreasing RDS(on) under surge, yielding <0.1Ω effective conduction path and eliminating the linear VC = VBR + IPP × RDYN dependency seen in junction-based devices. Its 175pF junction capacitance at 22V and 1MHz supports use on moderate-speed power/data lines without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it safely guards without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards for connector-facing protection. |
| Dynamic Resistance | 20mΩ - enables low-voltage drop under surge, minimizing power dissipation and thermal stress during 40A events. |
| Junction Capacitance | 175pF @ 22V, 1MHz - compatible with USB Type-C VBUS, load switch enable, and industrial sensor power rails. |
| Operating Temperature | –40°C to +125°C - supports deployment in automotive under-hood, industrial PLC, and outdoor IoT environments. |
Pinout & Package
SM05.TCT is housed in a RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required-energy is dissipated within the silicon FET structure. All six terminals are surface-mount; no thermal pad connection needed per manufacturer guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Parallel ground return paths-must all be connected to minimize inductance and maximize 40A surge current handling. |
| Pins 4, 5, 6 | IN | Parallel input terminals tied directly to protected line (e.g., USB PD VBUS)-all three required for rated performance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables near-constant clamping voltage independent of surge amplitude or ambient temperature-critical for reliable protection in varying field conditions. |
| Triple-terminal parallel I/O layout | Reduces trace inductance and distributes surge current across three pins, sustaining 40A without localized heating or bond-wire failure. |
| 20mΩ dynamic resistance | Minimizes voltage overshoot during fast-rising transients and lowers power dissipation (P = I²R), extending device lifetime under repeated surges. |
| 175pF junction capacitance | Preserves signal integrity on 22V power rails while avoiding resonance or filtering issues common with higher-capacitance TVS solutions. |
| UL 94V-0 molding compound | Ensures flame-retardant PCB mounting in safety-critical industrial and medical auxiliary power applications. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD negotiation against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed immediately at the connector, clamping transients before they reach the PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C-prevents false overvoltage shutdowns and ensures compliance with USB-IF surge test requirements. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment exposed to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents permanent damage to the load switch during 40A surge events-eliminates need for oversized external series resistors or derating. |
| IoT Edge Node Power Bus Protection | Industrial Storage Device VCC Line Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed smart sensors and gateway modules deployed in uncontrolled environments (e.g., outdoor utility boxes). IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power input, coordinated with low-capacitance TVS on data lines for full-system hardening. Use Value: Delivers 40A surge capability in 1.6×1.6mm footprint-reduces board area by >60% versus discrete TVS + MOV solutions. |
Use Scenario: Protecting 22V supply inputs to NVMe SSD controllers and SAS expanders in ruggedized storage enclosures subject to EFT bursts and conducted surges. IC Role / Device Role / Timing Role: Fast-acting clamp on primary power rail, preventing latch-up or gate oxide rupture in downstream PMICs and flash memory controllers. Use Value: 130–600nA reverse leakage at 22V ensures minimal standby current drain-critical for always-on storage subsystems. |
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 1.6×1.6mm package, identical pinout and marking (T22 code), but supplied in 7″ tape-and-reel (3,000 pcs/reel) vs. SM05.TCT's unspecified packaging. | Direct functional match for USB-C, load switch, and industrial 22V bus protection-no design change required if sourcing logistics permit reel size adjustment. | Select TDS2211P.C when volume procurement and automated assembly demand standardized 7″ reels. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, 12pF capacitance, SOD-323 package-optimized for CC/SBU lines, not power rails. | Intended for low-capacitance data-line protection only; unsuitable for 22V power bus clamping due to lower surge rating and different thermal design. | Use uClamp2411ZA only on USB-C configuration channel or sideband use lines-not as a substitute for SM05.TCT on VBUS. |
Compared with TDS2211P.C, SM05.TCT offers identical protection performance and pin compatibility but may differ in packaging format; compared with uClamp2411ZA, SM05.TCT delivers 2× higher surge current, 15× higher capacitance tolerance, and power-rail-rated construction-making it the sole suitable choice for 22V bus-level EOS suppression.
Availability
SM05.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle assurance, and consistent surge performance across temperature extremes.
Supply support for SM05.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 TDS family-including SM05.TCT-is engineered specifically for high-energy EOS protection of power and interface lines in next-generation USB, industrial, and IoT systems where conventional TVS limitations in clamping stability and temperature drift are unacceptable.
FAQ
What is the exact clamping voltage of SM05.TCT at 40A surge current?
The SM05.TCT clamps at 27.5–28V under 40A peak pulse current (8/20μs waveform, 2Ω source impedance), as guaranteed by design and verified across –40°C to +125°C. This value remains stable regardless of temperature or current magnitude within rated limits-unlike TVS diodes whose clamping rises linearly with IPP.
Does SM05.TCT require a thermal pad on the PCB?
No, SM05.TCT does not require a thermal pad. Its DFN 1.6×1.6mm package dissipates surge energy internally via the silicon FET structure, and Semtech explicitly states no thermal pad is needed-even under 40A 8/20μs surges. Ground connections via Pins 1–3 suffice for thermal and electrical performance.
Can SM05.TCT replace standard TVS diodes in 22V applications?
Yes-SM05.TCT is a direct functional upgrade over standard 22V TVS diodes. It delivers lower and temperature-stable clamping (27.5–28V vs. typical 35–42V), higher 40A surge rating, and eliminates voltage drift with temperature. However, its triple-terminal layout requires matching PCB routing-not a drop-in replacement without layout review.
What is the reverse leakage current of SM05.TCT at 22V?
At 22V reverse stand-off voltage and 25°C, SM05.TCT exhibits 130–600nA reverse leakage current. This ultra-low leakage ensures minimal impact on system standby power-especially valuable in battery-powered IoT nodes where every nanoamp affects operational lifetime.
Is SM05.TCT compliant with RoHS and halogen-free standards?
Yes, SM05.TCT is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound carries UL 94V-0 flammability rating, and lead finish is lead-free-meeting environmental and safety requirements for global industrial and consumer deployments.
SM05.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):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 9.8V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 400pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SM05.TCT FAQ
1.How can I place an order for SM05.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM05.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 SM05.TCT reliable?
The price and inventory of SM05.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM05.TCT is usually 5 days.
3.What payment methods are accepted for SM05.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM05.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM05.TCT?
SM05.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM05.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 SM05.TCT?
For technical support, including SM05.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM05.TCT requirements.
6.How does Aetrix verify that SM05.TCT is sourced from the original manufacturer or authorized distributors?
All SM05.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 SM05.TCT meets industry standards.
7.What is the process for return or replacement of SM05.TCT?
All SM05.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SM05.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 SM05.TCT part is unused and in its original packaging.
Return procedure for SM05.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM05.TCT Tags
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