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STMicroelectronics SM6T10CA
- Part No.:
- SM6T10CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T10CA.pdf
- Description:
- TVS DIODE 8.55VWM 14.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,502
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Product details
Overview
SM6T10CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for robust ESD and surge protection on signal/power lines in industrial, automotive, and telecom interfaces. It delivers 600 W peak pulse power (10/1000 µs), clamps at 14.5 V (max) under 41 A surge, and operates up to +150 °C junction temperature - enabling use in high-reliability SMPS input stages and CAN/LIN bus protection circuits.
For engineers reviewing the SM6T10CA datasheet, SM6T10CA pinout, SM6T10CA application, or SM6T10CA equivalent, key selection criteria include its bidirectional clamping behavior, low dynamic resistance (0.098 Ω), IEC 61000-4-2 ±30 kV contact discharge compliance, and SMB package thermal performance under sustained transient stress.
Technical Context
The SM6T10CA employs planar silicon avalanche technology to achieve precise, repeatable breakdown at 10 V (min–max 9.5–10.5 V) with tight tolerance and low leakage (<1 μA at 85 °C). Its bidirectional architecture enables symmetric clamping across both polarities without external polarity management.
It meets UL497B recognition (file E136224) as an isolated loop circuit protector and exceeds IEC 61000-4-4 Level 4 (4 kV) and IEC 61000-4-2 Level 4 (±30 kV air/contact discharge), making it suitable for front-end protection of isolated RS-485 transceivers and DC-DC converter feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 10 V - Maximum continuous reverse operating voltage before significant leakage begins; sets minimum system operating margin. |
| Breakdown Voltage (VBR) | 9.5–10.5 V @ 1 mA - Tight 10% tolerance ensures predictable turn-on during transients without false triggering. |
| Clamping Voltage (VCL) | 14.5 V @ 41 A (10/1000 µs) - Limits downstream IC voltage stress to safe levels during 600 W surges. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 4 kW (8/20 µs) - Supports high-energy lightning-induced surges in telecom line cards and PoE injectors. |
| Leakage Current (IRM) | 1 μA @ 85 °C - Enables stable operation in high-temp industrial sensors without signal path drift. |
| Junction Temperature Range | −55 to +150 °C - Allows placement near heat sources (e.g., MOSFETs, inductors) in compact power modules. |
| Dynamic Resistance (RD) | 0.098 Ω - Low impedance minimizes clamping voltage overshoot during fast-rising transients (e.g., EFT bursts). |
Pinout & Package
SM6T10CA is housed in an SMB (DO-214AA) surface-mount package measuring 3.95 × 5.60 × 2.45 mm (L × W × H), with matte tin-plated leads compliant with J-STD-002 and IPC7531 footprint standards. The bidirectional structure has no polarity marking requirement; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Transient current path | Either terminal conducts during positive or negative overvoltage events - eliminates orientation constraints during PCB layout. |
| Cathode/Anode (Bidirectional) | Transient current return path | Symmetric conduction enables single-device protection of AC-coupled or floating differential lines (e.g., RS-485, USB D+/D−). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or floating signal lines without polarity-sensitive placement. |
| Low dynamic resistance (0.098 Ω) | Reduces clamping voltage rise under high di/dt transients, improving protection margin for 3.3 V/5 V logic interfaces. |
| UL497B recognition (E136224) | Validates suitability for isolated loop protection in safety-critical industrial control systems per IEC 61000-4-x immunity requirements. |
| High Tj max (150 °C) | Supports placement adjacent to power components in space-constrained SMPS designs without derating. |
| IEC 61000-4-2 ±30 kV compliance | Meets highest ESD immunity level for end-equipment certification in medical and automotive applications. |
Applications
| Industrial RS-485 Networks | Automotive LIN Bus Protection |
|---|---|
|
Use Scenario: Protecting half-duplex RS-485 transceivers against ESD and inductive switching surges in factory automation PLCs and motor drives. IC Role / Device Role / Timing Role: Bidirectional TVS placed across A/B differential pair and ground to clamp common-mode transients before they reach the transceiver's internal ESD structures. Use Value: Prevents latch-up or permanent damage to MAX1487/SP3485-level transceivers during cable hot-plug or nearby relay switching events. |
Use Scenario: Safeguarding LIN transceivers (e.g., TJA1020) against battery dump and load-dump transients in body control modules. IC Role / Device Role / Timing Role: Clamping device connected between LIN bus line and chassis ground to limit voltage excursion to <18 V during ISO 7637-2 Pulse 5a events. Use Value: Maintains communication integrity during 12 V system transients up to 100 V peak, avoiding bus shutdown or node reset. |
| Telecom DSL Line Interface | AC-DC Adapter Feedback Path |
|
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Bidirectional TVS installed at line interface transformer secondary to suppress common-mode surges coupled into data pairs. Use Value: Withstands 4 kV IEC 61000-4-4 fast transient bursts while maintaining <15 V clamping to preserve PHY IC reliability. |
Use Scenario: Securing optocoupler feedback path in isolated flyback converters against primary-side switching noise coupling. IC Role / Device Role / Timing Role: TVS placed across optocoupler input pins to shunt high-frequency ringing induced by transformer leakage inductance. Use Value: Prevents false regulation due to transient-induced LED forward conduction, ensuring stable output voltage under dynamic load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10CA (Bourns) | Same SMB package, 600 W rating, but higher clamping voltage (17.0 V @ 35.1 A) and higher RD (0.135 Ω). | Less effective for 3.3 V/5 V interface protection where lower VCL is critical. | Prefer SM6T10CA when clamping voltage margin below 15 V is required. |
| P6SMB10CA (ON Semiconductor) | Identical electrical specs (VBR 9.5–10.5 V, VCL 14.5 V), but rated only to +125 °C Tj max and lacks UL497B recognition. | Not suitable for high-temperature industrial environments or safety-certified loop protection. | Choose SM6T10CA for designs requiring extended temperature range or regulatory traceability. |
Compared with SMBJ10CA and P6SMB10CA, SM6T10CA offers superior thermal capability (+150 °C), lower dynamic resistance, and UL497B certification - making it optimal for high-reliability, safety-compliant, and thermally demanding applications.
Availability
SM6T10CA is available at Aetrix Electronics and suitable for industrial RS-485 networks, automotive LIN bus protection, and telecom DSL line interface designs requiring stable component supply and full compliance documentation.
Supply support for SM6T10CA 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.
The SM6T series belongs to ST's high-reliability TVS portfolio, engineered specifically for planar silicon-based surge protection in high-temperature, low-leakage applications such as SMPS, isolated communications, and automotive body electronics.
FAQ
Is SM6T10CA unidirectional or bidirectional?
SM6T10CA is a bidirectional TVS diode, indicated by the "CA" suffix in its part number. It provides symmetrical clamping for both positive and negative transients, eliminating polarity concerns during PCB placement and enabling protection of AC-coupled or floating differential lines like RS-485 or LIN bus.
What is the maximum clamping voltage at 41 A surge current?
The maximum clamping voltage (VCL) for SM6T10CA is 14.5 V at 41 A peak pulse current under the 10/1000 µs waveform. This value is guaranteed across temperature and ensures downstream ICs remain within safe operating voltage limits during standardized surge events per IEC 61000-4-5.
Does SM6T10CA meet UL recognition requirements?
Yes - SM6T10CA is recognized to UL497B as an isolated loop circuit protector under agency file number E136224. This certification validates its suitability for use in safety-isolated circuits in industrial control and building automation systems where regulatory compliance is mandatory.
Can SM6T10CA replace SM6T10A in existing designs?
No - SM6T10A is unidirectional and must be oriented correctly on the PCB, whereas SM6T10CA is bidirectional. Substitution requires verifying that the circuit does not rely on DC blocking or polarity-specific conduction; otherwise, reverse-bias leakage or unintended conduction may occur in DC-coupled paths.
SM6T10CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.55V
- Voltage - Breakdown (Min):
- 9.5V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 41A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SM6T10CA FAQ
1.How can I place an order for SM6T10CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T10CA 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 SM6T10CA reliable?
The price and inventory of SM6T10CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T10CA is usually 5 days.
3.What payment methods are accepted for SM6T10CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T10CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T10CA?
SM6T10CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T10CA 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 SM6T10CA?
For technical support, including SM6T10CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T10CA requirements.
6.How does Aetrix verify that SM6T10CA is sourced from the original manufacturer or authorized distributors?
All SM6T10CA 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 SM6T10CA meets industry standards.
7.What is the process for return or replacement of SM6T10CA?
All SM6T10CA units undergo pre-shipment inspection (PSI). If there is an issue with SM6T10CA, 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 SM6T10CA part is unused and in its original packaging.
Return procedure for SM6T10CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T10CA Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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Diodes Incorporated
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