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Vishay General Semiconductor - Diodes Division SM6T12CA-E3/52
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- Part No.:
- SM6T12CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12CA-E3/52.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,029
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Product details
Overview
SM6T12CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 12 V standoff voltage (VWM), 16.7 V maximum clamping voltage at 36 A peak pulse current (10/1000 μs), 600 W peak pulse power rating, and operates from −65 °C to +150 °C junction temperature. It is widely used to protect automotive sensor interfaces and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the SM6T12CA-E3/52 datasheet, SM6T12CA-E3/52 pinout, SM6T12CA-E3/52 application, or SM6T12CA-E3/52 equivalent, key selection considerations include bidirectional clamping capability, SMB package compatibility with automated SMT assembly, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with J-STD-020 MSL level 1 reflow profile.
Technical Context
The SM6T12CA-E3/52 implements a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages. Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, eliminating need for orientation-sensitive placement.
It delivers 600 W peak pulse power handling under standardized 10/1000 μs waveform conditions with derating above 25 °C ambient, and maintains low leakage (<5 μA at 10.2 V) while achieving tight breakdown voltage tolerance (11.4 V to 12.6 V at 1 mA test current).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum reverse stand-off voltage before significant conduction begins; defines safe operating range for normal signal/power line voltages. |
| VBR min/max | 11.4 V / 12.6 V at 1 mA - Confirmed breakdown threshold ensures predictable clamping onset across production lots. |
| VC @ IPPM | 16.7 V at 36 A (10/1000 μs) - Clamping voltage limits downstream IC stress during surge events. |
| PPPM | 600 W - Peak pulse power rating determines survivability under lightning or load-switching transients. |
| RθJA | 100 °C/W - Thermal resistance informs PCB pad layout requirements for sustained power dissipation. |
| TJ range | −65 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point in negative polarity events | One terminal of symmetrical P-N junction; conducts during negative transients relative to cathode reference. |
| Cathode | Transient current entry point in positive polarity events | Other terminal of symmetrical P-N junction; conducts during positive transients; unmarked on bidirectional variants. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 600 W peak pulse power | Supports robust immunity to ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges. |
| MSL level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking. |
| Glass passivated junction | Ensures stable leakage performance and long-term reliability under humidity and thermal cycling. |
| AEC-Q101 qualified option | HE3/HM3 variants available for automotive applications requiring validated stress-test compliance. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤16.7 V during 36 A surges, preserving integrity of 12 V rail-tied receivers and preventing latch-up in precision ADC front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across 24 V DC input terminals to absorb repetitive inductive spikes. Use Value: Withstands ≥1000 surges at rated PPPM without parameter shift, enabling maintenance-free operation in factory automation systems. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Secondary-level ESD protection for USB 2.0 data lines (D+/D−) in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after primary common-mode choke to handle ±8 kV contact discharge per IEC 61000-4-2. Use Value: Sub-1 ns response time and <10 pF junction capacitance prevent signal integrity degradation while meeting Class 4 ESD immunity. | Use Scenario: Overvoltage protection for RS-485 transceiver inputs in base station remote units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Front-end TVS on differential pair to limit common-mode transients before isolation barrier or receiver stage. Use Value: 600 W rating supports IEC 61000-4-5 combination wave testing up to 4 kV, ensuring interoperability with telecom surge standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Same SMB package, identical VWM (10.2 V) and VC (16.7 V), but rated for 600 W with tighter VBR tolerance (11.7–12.3 V). | Preferred where tighter breakdown consistency is required for margin-critical designs; same PCB footprint. | Select SMBJ12CA when statistical process control demands narrower VBR distribution across temperature and lot. |
| P6SMB12CA | Same electrical specs and SMB package, but legacy designation; RoHS-compliant E3 suffix not guaranteed unless explicitly ordered as P6SMB12CA-E3. | Used in legacy BOMs where cross-reference validation is complete; identical thermal and surge performance. | Choose P6SMB12CA only when maintaining backward compatibility with existing approved hardware revisions. |
Compared with SM6T12CA-E3/52, SMBJ12CA offers tighter VBR control for high-reliability signal-line protection, while P6SMB12CA provides form-fit-function equivalence in legacy industrial systems-neither is pin-compatible by default without verifying packaging and marking conventions per reel label.
Availability
SM6T12CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface circuits requiring stable component supply and consistent surge immunity performance.
Supply support for SM6T12CA-E3/52 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications systems where robustness against ESD, lightning, and inductive switching is mandatory.
FAQ
What is the clamping voltage of SM6T12CA-E3/52 under a 10/1000 μs surge?
The SM6T12CA-E3/52 has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current of 36 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T12CA-E3/52 maintains this clamping performance across its full operating temperature range with appropriate derating.
Is SM6T12CA-E3/52 suitable for automotive applications?
The base SM6T12CA-E3/52 is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. However, Vishay offers automotive-grade variants under ordering codes SM6T12CAHE3 and SM6T12CAHM3, which undergo full AEC-Q101 stress testing. For non-safety-critical automotive subsystems, the SM6T12CA-E3/52 may be used with system-level validation; always specify HE3/HM3 suffixes when AEC-Q101 compliance is contractually required for the SM6T12CA-E3/52 family.
What is the package type and mounting specification for SM6T12CA-E3/52?
The SM6T12CA-E3/52 uses the SMB (DO-214AA) surface-mount package, measuring 4.57 mm × 3.94 mm × 2.20 mm. It features matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meets MSL level 1 per J-STD-020, and requires minimum 5.0 mm × 5.0 mm copper pads per terminal for rated power dissipation. The SM6T12CA-E3/52 is supplied in 7" tape-and-reel format (750 units per reel) with code "52".
Does SM6T12CA-E3/52 have polarity markings?
No, the SM6T12CA-E3/52 does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SM6T12A), which use a cathode band to indicate polarity, bidirectional types like SM6T12CA-E3/52 feature symmetrical conduction and are intentionally unmarked to prevent incorrect orientation during placement. This design simplifies automated assembly for AC or floating signal paths.
What is the maximum junction temperature rating for SM6T12CA-E3/52?
The SM6T12CA-E3/52 has a maximum junction temperature (TJ) rating of +150 °C and a minimum of −65 °C, supporting operation in harsh environments including under-hood automotive and industrial control cabinets. Its thermal resistance from junction to ambient (RθJA) is 100 °C/W under standard test conditions, meaning a 5 W steady-state dissipation would raise junction temperature by 500 °C above ambient-thus continuous DC power must remain well below PD = 5.0 W, as specified in the SM6T12CA-E3/52 datasheet.
SM6T12CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 36A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T12CA-E3/52 FAQ
1.How can I place an order for SM6T12CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12CA-E3/52 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 SM6T12CA-E3/52 reliable?
The price and inventory of SM6T12CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T12CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12CA-E3/52?
SM6T12CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12CA-E3/52 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 SM6T12CA-E3/52?
For technical support, including SM6T12CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12CA-E3/52 requirements.
6.How does Aetrix verify that SM6T12CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T12CA-E3/52 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 SM6T12CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T12CA-E3/52?
All SM6T12CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12CA-E3/52, 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 SM6T12CA-E3/52 part is unused and in its original packaging.
Return procedure for SM6T12CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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