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Vishay General Semiconductor - Diodes Division SM15T12CAHE3/57T
- Part No.:
- SM15T12CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12CAHE3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,935
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Product details
Overview
SM15T12CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 12 V standoff voltage (VWM), 16.7 V max clamping voltage at 90 A IPPM, and AEC-Q101 qualified for automotive use. It protects signal lines and power rails in sensor interfaces and motor drive I/O against lightning-induced and switching transients.
For engineers reviewing the SM15T12CAHE3/57T datasheet, SM15T12CAHE3/57T pinout, SM15T12CAHE3/57T application, or SM15T12CAHE3/57T equivalent, key selection criteria include bidirectional clamping behavior, 12 V VWM tolerance, 16.7 V VC under 90 A surge, AEC-Q101 qualification status, and SMC package thermal performance with RθJL = 15 °C/W.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 11.4–12.6 V at 1 mA test current and clamping voltage (VC) ≤16.7 V at 90 A peak pulse current (10/1000 μs). Its low-inductance SMC package enables fast response to sub-microsecond transients.
The device features glass-passivated junction, meets MSL Level 1 (260 °C reflow), and exhibits a failure mode of short circuit under overstress-critical for fail-safe system design in automotive ECUs and industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - ensures reliable triggering within tight voltage window |
| VC @ IPPM | 16.7 V at 90 A (10/1000 μs) - limits protected circuit voltage during surge |
| PPPM | 1500 W - handles high-energy lightning and inductive-switching transients |
| TJ max. | +150 °C - supports under-hood automotive operation without derating |
| RθJL | 15 °C/W - enables effective heat transfer to PCB copper pads |
| AEC-Q101 | Qualified - validated for automotive reliability per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (unmarked) | Transient conduction path (bidirectional) | No polarity marking; symmetrical terminals enable AC-coupled line protection |
| Anode (unmarked) | Transient conduction path (bidirectional) | Identical to cathode terminal; interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signal lines or differential buses without polarity concerns |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 8 mm × 8 mm copper pads |
| Glass-passivated junction | Ensures stable VBR over temperature and long-term reliability in humid or contaminated environments |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control, ADAS sensors, and body electronics |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting CAN/LIN bus lines and analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching MCU or analog front-end. Use Value: Limits transient voltage to ≤16.7 V, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field devices subject to inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage suppression element across input terminals, coordinated with series impedance for energy absorption. Use Value: Absorbs 1500 W surge energy without degradation, enabling >100,000 surge cycles per MIL-STD-883H Method 3015.8. |
| Telecom Line Interface | Consumer Power Adapter ESD |
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers in outdoor telecom equipment from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: First-stage TVS in multi-stage protection scheme, clamping common-mode transients before gas discharge tube or MOV stages. Use Value: Fast response (<1 ns) and low clamping voltage ensure compliance with ITU-T K.21 basic protection level. | Use Scenario: Adding secondary-level surge immunity to USB-C and barrel-jack inputs in smart home hubs and audio amplifiers. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary fuse and common-mode choke, handling residual differential transients. Use Value: 12 V VWM matches typical adapter output tolerances while maintaining margin against normal-mode noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | 600 W PPPM, SMA package, higher RθJA (90 °C/W), no AEC-Q101 qualification | Limited to commercial-grade consumer/industrial use; unsuitable for under-hood automotive | Select SMAJ12CA only for cost-sensitive, non-automotive designs with lower surge threat levels. |
| 1.5KE12CA | Through-hole DO-201 package, 1500 W PPPM, same VWM/VC, but larger footprint and manual assembly required | Used where board space allows and automated SMT is not available; lacks MSL Level 1 rating | Choose 1.5KE12CA for legacy through-hole systems or prototyping where reflow compatibility is not required. |
Compared with SMAJ12CA and 1.5KE12CA, SM15T12CAHE3/57T delivers automotive-grade reliability in a compact SMT package with superior thermal resistance (RθJL = 15 °C/W) and full AEC-Q101 validation-making it the preferred choice for production automotive and high-reliability industrial designs.
Availability
SM15T12CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O, telecom line protection, and consumer power adapter surge immunity requiring stable component supply and AEC-Q101 compliance.
Supply support for SM15T12CAHE3/57T 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, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments-targeting automotive powertrain and chassis systems, industrial automation I/O modules, and infrastructure equipment requiring IEC 61000-4-5 compliance.
FAQ
What is the clamping voltage of SM15T12CAHE3/57T at its rated peak pulse current?
The SM15T12CAHE3/57T has a maximum clamping voltage (VC) of 16.7 V at 90 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and reflects the actual voltage seen by downstream circuitry during surge events. The low clamping ratio (VC/VWM ≈ 1.39) confirms strong suppression capability for a 12 V system rail.
Is SM15T12CAHE3/57T suitable for automotive applications?
Yes, SM15T12CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It undergoes stress testing per AEC-Q101 Rev D-including HTGB, HTRB, TCT, and mechanical shock-and is rated for operation from −65 °C to +150 °C. Its qualification makes SM15T12CAHE3/57T appropriate for engine control units, ADAS camera modules, and body control modules.
What does the "CA" suffix indicate in SM15T12CAHE3/57T?
The "CA" suffix in SM15T12CAHE3/57T denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SM15T12A), SM15T12CAHE3/57T has no polarity marking and can be used on AC-coupled lines, differential buses, or any application where voltage transients may occur with either polarity.
What is the thermal resistance from junction to lead (RθJL) for SM15T12CAHE3/57T?
The SM15T12CAHE3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in the Vishay datasheet. This low value enables efficient heat transfer from the silicon die to the PCB copper pads, supporting sustained power dissipation and improving reliability during repeated surge events-especially critical in confined automotive or industrial enclosures.
How is SM15T12CAHE3/57T packaged and delivered?
SM15T12CAHE3/57T is supplied in 7-inch plastic tape and reel format (package code "57T") with 850 units per reel. The device uses an SMC (DO-214AB) surface-mount package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards, and meets MSL Level 1 for moisture sensitivity.
SM15T12CAHE3/57T 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T12CAHE3/57T FAQ
1.How can I place an order for SM15T12CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12CAHE3/57T 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 SM15T12CAHE3/57T reliable?
The price and inventory of SM15T12CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T12CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12CAHE3/57T?
SM15T12CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12CAHE3/57T 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 SM15T12CAHE3/57T?
For technical support, including SM15T12CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12CAHE3/57T requirements.
6.How does Aetrix verify that SM15T12CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T12CAHE3/57T 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 SM15T12CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T12CAHE3/57T?
All SM15T12CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12CAHE3/57T, 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 SM15T12CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T12CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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