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Vishay General Semiconductor - Diodes Division SM15T12CA-E3/57T
- Part No.:
- SM15T12CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12CA-E3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,602
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Product details
Overview
SM15T12CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 12 V standoff voltage (VWM), and clamping voltage of 16.7 V at 90 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T12CA-E3/57T datasheet, SM15T12CA-E3/57T pinout, SM15T12CA-E3/57T application, or SM15T12CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3 suffix), low-inductance SMC package layout compatibility, and verified 16.7 V clamping performance under 10/1000 μs surge conditions.
Technical Context
The SM15T12CA-E3/57T operates as a symmetrical avalanche diode with identical forward and reverse breakdown characteristics due to its bidirectional CA construction. Its 12 V standoff voltage enables protection of 12 V nominal systems while maintaining ≤10 μA leakage at VWM.
Clamping occurs at 16.7 V under 90 A (10/1000 μs), delivering precise overvoltage limiting without parasitic turn-on. Thermal resistance is 75 °C/W junction-to-ambient (RθJA) on standard 8 mm × 8 mm copper pads, supporting sustained operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; matches 12 V supply rails. |
| VBR min/max | 11.4 V / 12.6 V at 1 mA - Confirmed breakdown threshold ensures reliable triggering within ±5% tolerance. |
| VC @ IPPM | 16.7 V at 90 A (10/1000 μs) - Clamping voltage limits transient energy delivered to downstream ICs. |
| PPPM | 1500 W - Peak pulse power rating defines maximum transient energy absorption capability. |
| IPPM | 90 A - Peak pulse current capacity determines survivability against IEC 61000-4-5 Level 4 surges. |
| TJ max | 150 °C - Maximum junction temperature supports under-hood automotive and industrial ambient environments. |
| RθJA | 75 °C/W - Thermal resistance value guides PCB copper pad sizing for thermal management compliance. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | No polarity marking; symmetric conduction allows placement without orientation constraints. |
| Cathode | Transient current exit (bidirectional) | Same terminal as Anode in CA devices; both ends function identically during positive/negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities enables single-device protection of AC-coupled or floating signal lines. |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive front-end protection stages. |
| Low clamping ratio (VC/VWM = 1.39) | Minimizes voltage overshoot during transients, reducing stress on protected MOSFET gates and logic inputs. |
| MSL Level 1 rating | Supports standard SMT reflow profiles without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable leakage current (<10 μA at VWM) and long-term reliability under thermal cycling. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing negative and positive transients on differential or single-ended signal lines. Use Value: Prevents latch-up or gate oxide damage in protected ICs by limiting voltage to ≤16.7 V during 90 A surges. |
Use Scenario: Shielding PLC digital input terminals from field wiring surges induced by relay coil de-energization or nearby motor drives. IC Role / Device Role / Timing Role: Primary overvoltage suppression element placed directly at connector entry point before optocoupler or MCU input. Use Value: Enables robust 24 V DC input stage design meeting IEC 61000-4-4 EFT and IEC 61000-4-5 surge standards. |
| Telecom Line Interface | Consumer Power Supply Input |
Use Scenario: Safeguarding Ethernet PHY interface circuits and PoE injectors against lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Common-mode TVS device used in conjunction with CM chokes to suppress differential and common-mode transients. Use Value: Maintains signal integrity by clamping transients within 10 ns response time while preserving <1 pF junction capacitance. |
Use Scenario: Secondary-side transient suppression on 12 V DC output rails of wall adapters and USB-C PD power supplies. IC Role / Device Role / Timing Role: Final-stage protector preventing voltage spikes from reaching connected devices during hot-plug or short-circuit events. Use Value: Limits output rail excursion to ≤16.7 V, avoiding brown-out or reset conditions in downstream microcontrollers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Lower peak power (400 W), same VWM (12 V), higher VC (20.1 V at 20 A) | Limited to lower-energy threats (IEC 61000-4-4 only); insufficient for IEC 61000-4-5 Level 4 | Select when cost-sensitive designs require basic ESD/EFT protection without lightning-level surge margin. |
| SMCJ12CA | Higher peak power (1500 W), same VWM and VC, but larger SMC package (DO-214AB) with identical footprint | Functionally interchangeable; differs only in branding and minor process variations per Vishay documentation | Valid drop-in alternative if SM15T12CA-E3/57T is unavailable; same electrical specs and mechanical fit. |
Compared with SMAJ12CA and SMCJ12CA, the SM15T12CA-E3/57T delivers identical 1500 W surge handling and 16.7 V clamping in the standardized SMC outline, while offering broader AEC-Q101 qualification path via HE3 suffix variants-critical for automotive production traceability and qualification reporting.
Availability
SM15T12CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interface circuits requiring stable component supply across multi-year production cycles.
Supply support for SM15T12CA-E3/57T 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, and protection devices with emphasis on high-reliability, high-power, and automotive-grade solutions.
The SM15T Series is designed specifically for robust transient suppression in harsh environments-including under-hood automotive, factory automation, and outdoor telecom infrastructure-where 1500 W surge immunity and AEC-Q101 qualification are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T12CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning the SM15T12CA-E3/57T provides symmetrical clamping for both positive and negative transients. Unlike unidirectional "A" variants, it has no polarity marking and functions identically regardless of voltage polarity-ideal for AC-coupled or floating signal lines where direction of surge is unpredictable.
Is SM15T12CA-E3/57T qualified for automotive applications?
The base SM15T12CA-E3/57T is RoHS-compliant commercial grade. However, Vishay offers AEC-Q101-qualified versions under ordering codes SM15T12CAHE3_A/H or SM15T12CAHM3_A/H. These variants undergo extended stress testing and include full PPAP documentation-required for inclusion in automotive ECUs and ADAS sensor modules.
What is the clamping voltage of SM15T12CA-E3/57T under real surge conditions?
The SM15T12CA-E3/57T clamps to 16.7 V when subjected to a 10/1000 μs waveform at 90 A peak pulse current (IPPM). This value is measured per JEDEC standards and confirmed in Vishay's datasheet Figure 1 and Table on page 2. It remains stable across -65 °C to +150 °C operating range.
Can SM15T12CA-E3/57T replace SMAJ12CA in an existing design?
No-while both are 12 V bidirectional TVS diodes, the SM15T12CA-E3/57T delivers 1500 W peak power versus SMAJ12CA's 400 W. Substituting without layout or system-level validation risks inadequate surge margin. The SM15T12CA-E3/57T requires matching PCB copper area (8 mm × 8 mm pads) to achieve rated thermal performance.
What is the maximum leakage current of SM15T12CA-E3/57T at its standoff voltage?
At VWM = 12 V and TA = 25 °C, the SM15T12CA-E3/57T exhibits ≤5.0 μA maximum reverse leakage current (ID). This low leakage preserves signal integrity in high-impedance sensor interfaces and avoids false triggering in precision analog circuits.
SM15T12CA-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 90A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T12CA-E3/57T FAQ
1.How can I place an order for SM15T12CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12CA-E3/57T 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 SM15T12CA-E3/57T reliable?
The price and inventory of SM15T12CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T12CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12CA-E3/57T?
SM15T12CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12CA-E3/57T 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 SM15T12CA-E3/57T?
For technical support, including SM15T12CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12CA-E3/57T requirements.
6.How does Aetrix verify that SM15T12CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T12CA-E3/57T 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 SM15T12CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T12CA-E3/57T?
All SM15T12CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12CA-E3/57T, 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 SM15T12CA-E3/57T part is unused and in its original packaging.
Return procedure for SM15T12CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12CA-E3/57T Tags
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