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Vishay General Semiconductor - Diodes Division SM15T12CA-M3/57T
- Part No.:
- SM15T12CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12CA-M3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,920
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Product details
Overview
SM15T12CA-M3/57T 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 inductive-switching transients.
For engineers reviewing the SM15T12CA-M3/57T datasheet, SM15T12CA-M3/57T pinout, SM15T12CA-M3/57T application, or SM15T12CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 12 V VWM, 16.7 V VC at 90 A, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities with identical breakdown (VBR = 11.4–12.6 V at 1 mA), clamping (VC = 16.7 V @ 90 A), and leakage (<5.0 μA @ 10.2 V) characteristics in either direction. Its low-inductance SMC package and glass-passivated junction support fast transient response and robust surge handling without polarity sensitivity.
The device is designed for high-impedance source environments where threat currents remain within its 90 A IPPM rating under 10/1000 μs waveform conditions. Failure mode is short-circuit, and thermal resistance is RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 16.7 V at 90 A (10/1000 μs) - Clamping voltage limits downstream IC stress to safe levels during standardized surge testing. |
| PPPM | 1500 W - Peak pulse power rating determines survivability against lightning and switching transients per IEC 61000-4-5. |
| IPPM | 90 A - Peak pulse current capacity defines maximum transient energy absorption before failure. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive and industrial ambient environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal pad layout. |
Pinout & Package
SM15T12CA-M3/57T uses a 2-terminal SMC (DO-214AB) package with no polarity marking-consistent with bidirectional functionality. Terminals are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No functional distinction between terminals; either terminal serves as input/output for clamping in both directions. |
| Case (cathode band absent) | Non-polarized mounting interface | Absence of band confirms bidirectional construction; PCB layout requires no orientation alignment during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced surges per IEC 61000-4-5 Level 4 without derating in standard layouts. |
| Low clamping ratio (VC/VWM = 1.64) | Minimizes voltage overshoot during clamping, reducing risk of damage to 3.3 V or 5 V logic interfaces downstream. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising surge performance. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination risks. |
| Low junction-to-lead thermal resistance (RθJL = 15 °C/W) | Improves heat dissipation into PCB copper, sustaining repetitive surge capability in thermally constrained designs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive kickback in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching sensitive analog front-ends or communication ICs. Use Value: Maintains signal integrity under ±12 V transients while limiting clamped voltage to ≤16.7 V, ensuring compatibility with 12 V rail-tolerant receivers. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to 24 V DC field wiring carrying motor switching noise and ESD. IC Role / Device Role / Timing Role: Standoff-clamp TVS mounted inline with optocoupler inputs or microcontroller GPIOs to absorb 1 kV/500 A surge pulses per IEC 61000-4-4. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic by clamping 24 V line transients to 16.7 V within <1 ns response time. |
| Telecom Line Interface | Consumer Power Adapter EMI Filtering |
Use Scenario: Shielding Ethernet PHY magnetics and PoE detection circuitry from induced surges on outdoor cabling in IP cameras and access points. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary gas discharge tube (GDT) to refine clamping and handle residual fast-rising edges. Use Value: Reduces let-through voltage to sub-20 V levels compatible with 24 V tolerant PHY ICs, improving system-level immunity to combination wave surges. |
Use Scenario: Suppressing differential-mode noise and switching spikes on secondary-side 12 V output rails of AC/DC adapters used in smart home hubs and audio devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed across output capacitor to prevent voltage overshoot during load transients and hot-plug events. Use Value: Limits output rail excursions to ≤16.7 V during 100 ns–1 μs spikes, avoiding brownout resets in connected USB peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | 600 W PPPM, same VWM/VC, SMA package (smaller footprint, higher RθJA) | Limited to lower-energy threats; unsuitable for lightning-level surges requiring ≥1500 W | Select when board space is critical and surge threat level is defined as IEC 61000-4-2 ESD only. |
| SMCJ12CA | 1500 W PPPM, identical VWM/VC, same SMC package but M3 suffix not guaranteed; may be E3 or HE3 | Same clamping performance but lacks halogen-free assurance unless explicitly ordered as HM3 variant | Choose if halogen-free compliance is not required and AEC-Q101 qualification is unnecessary. |
Compared with SMAJ12CA and SMCJ12CA, SM15T12CA-M3/57T uniquely combines 1500 W surge capability, halogen-free RoHS compliance, and MSL Level 1 reflow tolerance in a single production-grade variant-making it optimal for automotive Tier-1 and industrial OEM programs requiring full material traceability and process consistency.
Availability
SM15T12CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply with full halogen-free compliance and AEC-Q101 qualification pathway.
Supply support for SM15T12CA-M3/57T 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge immunity, bidirectional symmetry, and halogen-free compliance are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in SM15T12CA-M3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T12CA-M3/57T provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SM15T12A), it has no cathode marking and delivers identical VBR, VC, and leakage performance regardless of voltage polarity applied across its terminals.
Is SM15T12CA-M3/57T qualified to AEC-Q101?
SM15T12CA-M3/57T itself is commercial-grade with halogen-free RoHS compliance (M3 suffix). However, the SM15T12CA-HM3/57T variant-identical in electrical specs but with HM3 suffix-is AEC-Q101 qualified. For automotive applications requiring formal qualification, specify HM3 instead of M3 in the ordering code.
What is the maximum clamping voltage of SM15T12CA-M3/57T under surge conditions?
The maximum clamping voltage of SM15T12CA-M3/57T is 16.7 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 90 A. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuits during standardized surge events.
Can SM15T12CA-M3/57T replace SM15T12A in an existing design?
SM15T12CA-M3/57T can replace SM15T12A only if bidirectional protection is required and polarity-sensitive layout constraints are removed. While both share identical VWM, VBR, and VC, SM15T12A is unidirectional with cathode marking and forward conduction capability-whereas SM15T12CA-M3/57T has no polarity and blocks in both directions until breakdown.
What PCB pad layout is recommended for optimal thermal performance of SM15T12CA-M3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SM15T12CA-M3/57T to achieve rated 1500 W pulse power and maintain RθJA = 75 °C/W. Use internal ground/power planes connected via multiple thermal vias under each pad to enhance heat spreading and sustain repetitive surge duty cycles.
SM15T12CA-M3/57T 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-M3/57T FAQ
1.How can I place an order for SM15T12CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12CA-M3/57T 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-M3/57T reliable?
The price and inventory of SM15T12CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T12CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12CA-M3/57T?
SM15T12CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12CA-M3/57T 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-M3/57T?
For technical support, including SM15T12CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12CA-M3/57T requirements.
6.How does Aetrix verify that SM15T12CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T12CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T12CA-M3/57T?
All SM15T12CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SM15T12CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12CA-M3/57T Tags
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