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Semtech Corporation SM712.TCT
- Part No.:
- SM712.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SM712.TCT.pdf
- Description:
- TVS DIODE 12V/7V 26V/12V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:133,965
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Product details
Overview
SM712.TCT from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V DC power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and stable 27.5–28V clamping across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SM712.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under surge, low dynamic resistance (<20 mΩ), junction capacitance (175 pF at 22V), and DFN 1.6×1.6mm 6-lead layout compatibility with high-density USB PD and IoT power rail designs.
Technical Context
The SM712.TCT 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. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under increasing IPP - not governed by fixed RDYN × IPP.
It operates over –40°C to +125°C, maintains ≤600 nA reverse leakage at 22V, and delivers 1120W peak pulse power (8/20μs). Its functional architecture separates trigger threshold (25–27.9V VBR) from clamping behavior (27.5–28V VC), enabling predictable protection margins for 22V bus systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - defines maximum continuous DC operating voltage before triggering; matches USB PD 20V nominal + margin. |
| Clamping Voltage | 27.5–28 V at 24–40A (1.2/50μs + 8/20μs combo wave) - ensures protected ICs (e.g., USB PD controllers) remain below absolute max ratings during surge. |
| Peak Pulse Current | 40 A (8/20μs) - supports IEC 61000-4-5 Level 4 industrial surge immunity (±1 kV, RS = 42 Ω). |
| Dynamic Resistance | 20 mΩ - enables flat clamping curve; reduces voltage rise per amp vs. TVS diodes with higher RDYN. |
| Junction Capacitance | 175 pF at 22 V, 1 MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 requirements for handheld and portable equipment interfaces. |
| Operating Temp. | –40°C to +125°C - supports industrial and automotive under-hood environments without derating. |
Pinout & Package
SM712.TCT is housed in a RoHS-compliant DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with six terminals. The package features exposed thermal pad-less construction optimized for PCB-level surge dissipation via low-inductance ground vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or power rail); parallel connection of all three pins ensures full 40A rating and uniform current distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5 V across 24–40A IPP and –40°C to +125°C - eliminates thermal derating uncertainty in industrial deployments. |
| FET-based shunt protection | Surge energy diverted through low-RDS(on) channel instead of PN-junction - avoids thermal runaway and enables repeatable surge survival. |
| Low dynamic resistance | 20 mΩ measured between 1A–40A (8/20μs) - minimizes IR drop during surge, preserving clamping accuracy under high-current transients. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz & 5 kHz bursts) - protects against repetitive fast transients in motor drives and PLC I/O modules. |
| Space-optimized DFN | 1.6 mm × 1.6 mm footprint - saves >60% board area vs. SO-8 or SOT-23 TVS alternatives while maintaining 40A capability. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt device placed immediately after connector, clamping transients before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature - prevents false overvoltage shutdown or latch-up in PD controllers rated for 24–28V absolute max. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: First-line transient diverter on VIN rail, limiting voltage seen by internal FET gate oxide and overvoltage protection circuitry. Use Value: Keeps clamping voltage below 28V - avoids damage to load switch's internal 30V-rated FET while sustaining 40A surge without degradation. |
| IoT Device DC Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-backed smart sensors and edge gateways subjected to ESD during field servicing and EFT in noisy factory floors. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, replacing multi-device TVS arrays with single-component solution. Use Value: Delivers ±30kV ESD and ±4kV EFT immunity in 1.6×1.6mm footprint - enables compact, sealed enclosures without sacrificing surge robustness. |
Use Scenario: Protecting 22V backup power inputs in NVMe SSDs and enterprise storage controllers where transient-induced latch-up causes data corruption. IC Role / Device Role / Timing Role: Low-capacitance (175 pF), low-leakage (≤600 nA) protector on backup supply path, minimizing standby power loss and signal coupling. Use Value: Stable clamping ensures backup rail stays within 22V system tolerance during 8/20μs surges - prevents unintended reset or brownout detection. |
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); differs only in tape-and-reel packaging (3,000 pcs/reel vs. SM712.TCT's unspecified quantity). | Direct drop-in replacement in production; validated for same USB PD and load switch use cases per Semtech documentation. | Select TDS2211P.C when standard reel quantity and traceability (date code XX) are required for automated assembly. |
| SP1003-02HTG | TVS diode array (SOD-323), 22V VRWM, 33V VC @ 12A - higher clamping, no constant-clamp behavior, 2× higher dynamic resistance (~45 mΩ), 25 pF typical capacitance. | Suitable only for lower-energy ESD-only scenarios; cannot sustain 40A surges or maintain clamping stability over temperature. | Choose SP1003-02HTG only for cost-sensitive, low-surge-risk consumer ports where 12A IPP suffices and ultra-low capacitance is critical. |
Compared with SM712.TCT, TDS2211P.C offers identical protection performance and mechanical fit, while SP1003-02HTG trades clamping stability and surge capacity for lower capacitance and cost - making SM712.TCT optimal for high-reliability 22V industrial and USB PD applications demanding consistent 40A surge handling.
Availability
SM712.TCT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT power rails, and storage device backup supplies requiring stable component supply with guaranteed long-term availability.
Supply support for SM712.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 solutions.
The SM712.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where clamping voltage stability across temperature and current is mission-critical.
FAQ
What is the maximum continuous operating voltage for SM712.TCT?
The SM712.TCT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously block up to 22 V DC without triggering. This matches the maximum operating voltage of USB PD 3.0 extended power range and industrial 22V auxiliary rails. Exceeding 22 V risks premature conduction and reduced reliability. The SM712.TCT is rated for this exact voltage threshold per its datasheet absolute maximum and electrical characteristics tables.
How does SM712.TCT achieve stable clamping voltage across temperature?
The SM712.TCT achieves stable clamping using a surge-rated FET shunt architecture rather than a PN-junction TVS. When triggered, its RDS(on) decreases with rising current, counteracting voltage rise - resulting in 27.5–28 V clamping from –40°C to +125°C. This contrasts with TVS diodes whose VC increases linearly with temperature. The SM712.TCT's clamping stability is confirmed in its Typical Characteristics graphs and electrical specs table.
Can SM712.TCT replace standard TVS diodes in existing 22V designs?
Yes, SM712.TCT can replace standard TVS diodes in 22V applications - but only if the PCB layout accommodates its 6-pin DFN footprint and all GND (pins 1–3) and IN (pins 4–6) connections are implemented. Its constant-clamp behavior improves protection margin, but requires verifying that downstream ICs tolerate its 27.5–28 V clamping level. The SM712.TCT datasheet explicitly positions it as a superior alternative to traditional TVS for high-reliability 22V EOS protection.
What is the peak pulse current rating of SM712.TCT and which standard does it meet?
The SM712.TCT is rated for 40 A peak pulse current with an 8/20 μs waveform, meeting IEC 61000-4-5 Level 4 surge immunity requirements (±1 kV with 42 Ω source impedance). This rating is validated in its Absolute Maximum Ratings table and supported by clamping voltage curves across 1–40 A. The SM712.TCT's ability to sustain this current without degradation is enabled by its FET-based thermal design and low 20 mΩ dynamic resistance.
Is SM712.TCT compatible with automated SMT assembly processes?
Yes, SM712.TCT is fully compatible with standard SMT reflow processes. It uses a Pb-free, halogen-free, RoHS/WEEE-compliant DFN package with UL 94V-0 molding compound and lead-free finish. Its 1.6 mm × 1.6 mm outline and land pattern match IPC-7351 recommendations, and Semtech provides detailed PCB layout guidelines - including via placement and trace routing - to ensure reliable solder joint formation and surge performance. The SM712.TCT's marking (T22 + date code) also supports automated optical inspection.
SM712.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:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 12V (Max), 7V (Max)
- Voltage - Breakdown (Min):
- 13.3V, 7.5V
- Voltage - Clamping (Max) @ Ipp:
- 26V, 12V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- RS-485
- Capacitance @ Frequency:
- 75pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SM712.TCT FAQ
1.How can I place an order for SM712.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM712.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 SM712.TCT reliable?
The price and inventory of SM712.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM712.TCT is usually 5 days.
3.What payment methods are accepted for SM712.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM712.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM712.TCT?
SM712.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM712.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 SM712.TCT?
For technical support, including SM712.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM712.TCT requirements.
6.How does Aetrix verify that SM712.TCT is sourced from the original manufacturer or authorized distributors?
All SM712.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 SM712.TCT meets industry standards.
7.What is the process for return or replacement of SM712.TCT?
All SM712.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SM712.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 SM712.TCT part is unused and in its original packaging.
Return procedure for SM712.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM712.TCT Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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