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STMicroelectronics SM15T100CA
- Part No.:
- SM15T100CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T100CA.pdf
- Description:
- TVS DIODE 85.5VWM 178VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
SM15T100CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in SMC package, designed for IEC 61000-4-2 ESD protection (30 kV air/contact) and IEC 61000-4-4 surge immunity (4 kV level 4). It features 100 V standoff voltage (VRM), 137 V clamping voltage at 56 A (8/20 µs), and 1500 W peak pulse power (10/1000 µs) at 25 °C - deployed in telecom line interfaces and industrial Ethernet ports requiring robust overvoltage resilience.
For engineers reviewing the SM15T100CA datasheet, SM15T100CA pinout, SM15T100CA application, or SM15T100CA equivalent, key selection criteria include bidirectional clamping behavior, low leakage (<0.2 µA at 25 °C), high junction temperature rating (150 °C), and compatibility with FR4 PCB footprints per IPC7531.
Technical Context
This TVS diode uses planar silicon technology to achieve stable breakdown characteristics across temperature (αT = 10.6 × 10⁻⁴ /°C) and low dynamic resistance (RD = 1.30 Ω at 25 °C), enabling precise clamping during fast transients. Its bidirectional structure supports symmetrical surge suppression on AC-coupled or differential signal lines without polarity constraints.
The device meets MIL-STD-883 Method 3015 ESD stress and operates reliably up to 150 °C junction temperature, with derated pulse power reaching 1250 W at Tj = 150 °C (10/1000 µs). Thermal impedance is optimized for standard SMC footprint (Zth(j-a) ≈ 100 °C/W for single pulse).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 100 V - maximum continuous reverse working voltage before significant leakage; defines operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 85.5–105 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VCL) | 137 V at 56 A (8/20 µs) - peak voltage seen by protected circuit under defined surge; limits stress on downstream ICs. |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - energy-handling capability under standard lightning surge waveform; validates protection level for IEC 61000-4-5 Class III. |
| Leakage Current (IRM) | 0.2 µA at 25 °C - ultra-low reverse leakage preserves signal integrity in high-impedance analog or data lines. |
| Junction Temperature Range | −55 to +150 °C - enables deployment in extended-temperature industrial and automotive under-hood environments. |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds Level 4 requirements, eliminating need for external ESD staging. |
Pinout & Package
SM15T100CA is housed in an SMC (DO-214AB) surface-mount package with two terminals: Cathode (K) and Anode (A), arranged in a symmetrical bidirectional configuration. The package measures 7.75–8.15 mm × 5.55–6.25 mm × 2.45 mm max height and complies with JEDEC MO-136AC outline and IPC7531 footprint recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Terminal 1 (cathode-marked end) | One side of bidirectional avalanche junction; connects to line under protection without polarity dependency. |
| Cathode (K) | Terminal 2 (opposite end) | Second side of bidirectional junction; forms symmetrical clamping path with Anode for AC or differential signals. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC-coupled or differential interfaces (e.g., RS-485, CAN FD) without polarity-sensitive layout. |
| Low dynamic resistance (RD) | 1.30 Ω at 25 °C - minimizes voltage overshoot during fast surges and improves clamping precision under high-current transients. |
| High-temperature operation | Rated to 150 °C junction temperature with <0.2 µA leakage - supports reliability in thermally constrained enclosures or near power stages. |
| UL 497B certified | QVGQ2.E136224 listing - validates suitability for primary-side telecom surge protection per UL safety standards. |
| ECOPACK® compliant | Meets RoHS and halogen-free requirements with matte tin lead finish - supports environmental compliance in global OEM designs. |
Applications
| Industrial Ethernet Port Protection | Telecom DSL Line Interface |
|---|---|
Use Scenario: Protecting RJ-45 PHY interface against induced surges and ESD in factory-floor Ethernet switches. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs (e.g., TX+/TX−, RX+/RX−) to clamp common-mode transients. Use Value: Limits clamped voltage to ≤137 V during 56 A 8/20 µs surge, preventing PHY IC latch-up or damage while maintaining signal integrity via low capacitance (<100 pF). |
Use Scenario: Safeguarding ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Primary-level surge suppressor mounted at line entry point, upstream of isolation transformers and front-end filters. Use Value: Withstands 4 kV IEC 61000-4-4 level 4 surges and ±30 kV ESD, reducing need for multi-stage protection and simplifying BOM. |
| Automotive Body Control Module (BCM) LIN Bus | Smart Meter Communication Interface |
Use Scenario: Securing LIN bus transceivers in vehicle body electronics exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS on LIN signal line, complementing primary protection in power supply domain. Use Value: Operates reliably at 150 °C ambient, maintains <0.2 µA leakage at elevated temperatures to avoid false wake-up or current drain in sleep mode. |
Use Scenario: Shielding HPLC (HomePlug AV) or RF M-Bus communication circuits in utility smart meters from grid-induced transients. IC Role / Device Role / Timing Role: Bidirectional clamping element on AC-coupled data lines interfacing with PLC modems or sub-GHz radios. Use Value: Symmetrical VBR (85.5–105 V) and matched clamping ensure balanced protection on both signal polarities, critical for AC-coupled waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA (Bourns) | Same SMC package, 100 V VRM, but lower PPP (600 W @ 10/1000 µs) and higher VCL (165 V @ 43.5 A). | Limited to lower-energy surge environments; unsuitable for IEC 61000-4-5 Class III where 1500 W rating is required. | Select when cost sensitivity outweighs surge energy headroom and board space allows parallel devices. |
| P6SMB100CA (Littelfuse) | Identical 100 V VRM and SMC package, but rated for 600 W only; VCL = 165 V @ 43.5 A (8/20 µs). | Requires derating in high-temperature environments due to lower thermal stability margin above 125 °C. | Prefer for legacy designs already qualified with P6SMB series; verify thermal performance at 150 °C junction. |
Compared with SMBJ100CA and P6SMB100CA, SM15T100CA delivers 2.5× higher peak pulse power (1500 W vs. 600 W) and tighter clamping (137 V vs. 165 V), enabling single-device protection in demanding industrial and telecom surge classes without parallel staging.
Availability
SM15T100CA is available at Aetrix Electronics and suitable for industrial Ethernet port protection, telecom DSL line interfaces, automotive LIN bus safeguarding, and smart meter communication interfaces requiring stable component supply across long production lifecycles.
Supply support for SM15T100CA 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
SM15T100CA belongs to ST's high-power planar TVS diode family, engineered specifically for robust, low-leakage surge protection in high-reliability wired communication and power-line interface applications.
FAQ
What is the maximum clamping voltage of SM15T100CA under an 8/20 µs surge?
The maximum clamping voltage (VCL) is 137 V at 56 A for an 8/20 µs waveform, measured at 25 °C. This value increases with junction temperature at a coefficient of 10.6 × 10⁻⁴ /°C, reaching approximately 145 V at 125 °C junction temperature.
Is SM15T100CA compatible with lead-free reflow soldering?
Yes - SM15T100CA is qualified for lead-free reflow per J-STD-020 MSL level 1, with a peak reflow temperature of 240–245 °C for 20–40 seconds. The matte tin plating ensures reliable wetting and intermetallic formation without whisker risk (JESD-201 Class 2).
How does SM15T100CA differ from unidirectional SM15T100A?
SM15T100CA is bidirectional with symmetrical breakdown in both polarities, making it suitable for AC or differential signal lines. SM15T100A is unidirectional, conducting only in reverse bias - used where polarity is fixed and forward conduction must be blocked.
Can SM15T100CA replace P6SMB100CA in existing designs?
Yes, as a direct drop-in replacement in SMC footprint, but with superior performance: 1500 W vs. 600 W peak power, 137 V vs. 165 V clamping, and lower leakage. No layout change is needed, though system-level surge testing should confirm margin improvement.
SM15T100CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 178V
- Current - Peak Pulse (10/1000µs):
- 56A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SM15T100CA FAQ
1.How can I place an order for SM15T100CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T100CA 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 SM15T100CA reliable?
The price and inventory of SM15T100CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T100CA is usually 5 days.
3.What payment methods are accepted for SM15T100CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T100CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T100CA?
SM15T100CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T100CA 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 SM15T100CA?
For technical support, including SM15T100CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T100CA requirements.
6.How does Aetrix verify that SM15T100CA is sourced from the original manufacturer or authorized distributors?
All SM15T100CA 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 SM15T100CA meets industry standards.
7.What is the process for return or replacement of SM15T100CA?
All SM15T100CA units undergo pre-shipment inspection (PSI). If there is an issue with SM15T100CA, 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 SM15T100CA part is unused and in its original packaging.
Return procedure for SM15T100CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T100CA Tags
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