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Semtech Corporation SM36.TCT
- Part No.:
- SM36.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SM36.TCT.pdf
- Description:
- TVS DIODE 36VWM 60VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:40,092
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Product details
Overview
SM36.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 (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the SM36.TCT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and power delivery systems.
Technical Context
The SM36.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transients to ground. Its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
Unlike conventional TVS diodes, SM36.TCT exhibits stable clamping (27.5–28V) from –40°C to +125°C and maintains <600nA reverse leakage at 22V, enabling robust protection in thermally demanding environments without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 29V across full temp range, protecting 30V-tolerant controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD requirements. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot during fast transients, critical for sensitive load switches. |
| Junction Capacitance | 175pF at 22V - suitable for DC/low-speed power line protection; not for high-speed data lines. |
Pinout & Package
SM36.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), UL 94V-0 molding compound, and lead-free finish. All six terminals must be connected per functional role to achieve rated 40A surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be vias-connected to internal ground plane. |
| 4, 5, 6 | IN | Protected line input (bus or power rail); parallel connection ensures uniform current sharing and minimizes inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A (8/20μs), eliminating need for oversized IPP margining. |
| Temperature-stable protection | Clamps at 27.5–28V from –40°C to +125°C - no derating required for industrial ambient conditions. |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction, enabling higher reliability than TVS diodes. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during sub-microsecond transients. |
Applications
| USB Type-C Power Delivery 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: Primary EOS shunt device placed adjacent to connector, clamping surges before reaching PD controller IC. Use Value: Maintains 27.5–28V clamp across temperature and current range, preventing damage to 30V-rated PD controllers like STUSB4500 or TUSB73x. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., ON Semi NIS513x, TI TPS2598x) against lightning-induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage seen by internal FET gate oxide. Use Value: Keeps clamping voltage below 29V at 125°C, ensuring safe operation within 30V absolute maximum rating of load switch inputs. |
| IoT Edge Node Power Bus Protection | Storage Device 24V Rail Protection |
Use Scenario: Securing 22–24V auxiliary power rails in battery-backed IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks, reducing BOM count and PCB area. Use Value: Delivers 40A surge capability in 1.6×1.6mm footprint - 70% smaller than discrete 22V TVS arrays with comparable ratings. |
Use Scenario: Protecting SATA or NVMe storage module 24V auxiliary rails in enterprise servers and NAS enclosures. IC Role / Device Role / Timing Role: Standalone clamping device on backplane power distribution, coordinated with upstream fusing. Use Value: 175pF capacitance avoids signal integrity issues on DC rails; ±30kV ESD rating prevents latch-up during hot-plug events. |
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 code "T22" - confirmed drop-in replacement per Semtech ordering documentation. | Same USB PD, load switch, and industrial 22V rail use cases; validated in Semtech reference designs. | Select TDS2211P.C when requiring Semtech's standard tape-and-reel packaging (3,000 pcs/reel) and traceable date coding. |
| uClamp2411ZA | 24V working voltage, lower 20A (8/20μs) rating, 12pF capacitance - optimized for CC/SBU lines, not power rails. | Intended for low-capacitance protection of USB-C configuration channels, not 22V bus-level suppression. | Choose uClamp2411ZA only for signal-line protection; unsuitable as SM36.TCT substitute due to insufficient IPP and different clamping profile. |
Compared with SM36.TCT, TDS2211P.C offers identical protection performance and mechanical compatibility, while uClamp2411ZA serves a distinct low-capacitance signal-line role - making TDS2211P.C the only functionally and physically aligned alternative for 22V power rail applications.
Availability
SM36.TCT is available at Aetrix Electronics and suitable for USB PD implementations, industrial load switch designs, and IoT edge node power bus protection requiring stable component supply, long-term lifecycle support, and guaranteed surge performance consistency across production batches.
Supply support for SM36.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 protection, sensing, and signal integrity solutions.
SM36.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace traditional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature resilience are critical.
FAQ
What is the exact package type and dimensions of SM36.TCT?
SM36.TCT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad, RoHS-compliant lead-free finish, and UL 94V-0 flammability rating. Pin 1 is marked with a laser dot; land pattern follows Semtech's recommended 0.30mm pad width and 0.50mm pitch.
Does SM36.TCT meet IEC 61000-4-5 surge immunity standards?
Yes, SM36.TCT is rated for 40A peak pulse current (8/20μs) and ±1kV (1.2/50μs voltage, 8/20μs current, RS = 42Ω) per IEC 61000-4-5, making it suitable for Level 4 industrial surge protection in mains-connected equipment and USB PD power adapters.
How does SM36.TCT differ from standard TVS diodes in clamping behavior?
SM36.TCT uses a triggered FET shunt instead of a PN junction, delivering near-constant 27.5–28V clamping from 24A to 40A and –40°C to +125°C. Standard TVS diodes exhibit linear VC = VBR + IPP × RDYN rise, causing >38V clamping at high temperature and current - a key limitation SM36.TCT eliminates.
Can SM36.TCT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SM36.TCT is not suitable for high-speed data lines due to its 175pF junction capacitance at 22V, which would severely degrade signal integrity. It is intended exclusively for DC or low-frequency power and control lines - use RClamp3371ZC (<0.25pF) for USB SS or DP/DM lanes.
What is the maximum operating temperature range for SM36.TCT?
SM36.TCT operates reliably from –40°C to +125°C ambient temperature, with clamping voltage and leakage current fully characterized across this range. Junction temperature can reach +150°C, and the device maintains <600nA reverse leakage at 22V even at +125°C.
SM36.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):
- 36V (Max)
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 60V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 45pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SM36.TCT FAQ
1.How can I place an order for SM36.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM36.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 SM36.TCT reliable?
The price and inventory of SM36.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM36.TCT is usually 5 days.
3.What payment methods are accepted for SM36.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM36.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM36.TCT?
SM36.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM36.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 SM36.TCT?
For technical support, including SM36.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM36.TCT requirements.
6.How does Aetrix verify that SM36.TCT is sourced from the original manufacturer or authorized distributors?
All SM36.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 SM36.TCT meets industry standards.
7.What is the process for return or replacement of SM36.TCT?
All SM36.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SM36.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 SM36.TCT part is unused and in its original packaging.
Return procedure for SM36.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM36.TCT Tags
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