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Vishay General Semiconductor - Diodes Division SM15T12CAHE3/9AT
- Part No.:
- SM15T12CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12CAHE3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,180
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Product details
Overview
SM15T12CAHE3/9AT 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 stand-off voltage (VWM), and clamping voltage of 16.7 V at 90 A peak pulse current. It provides robust protection for automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T12CAHE3/9AT datasheet, SM15T12CAHE3/9AT pinout, SM15T12CAHE3/9AT application, or SM15T12CAHE3/9AT equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 12 V VWM, low clamping ratio (1.39×VWM), and compatibility with high-reliability automotive PCB layouts requiring MSL Level 1 and 260 °C reflow.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown in both directions (VBR = 11.4–12.6 V), enabling use on AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<5.0 μA at VWM) and repeatable clamping performance across temperature.
The SM15T12CAHE3/9AT delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted on 8.0 mm × 8.0 mm copper pads, with thermal resistance RθJA = 75 °C/W and maximum junction temperature of +150 °C - supporting sustained operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before significant leakage; defines safe signal swing margin for 12 V nominal systems. |
| VBR min/max | 11.4 V / 12.6 V at 1.0 mA - Confirmed bidirectional breakdown threshold; ensures symmetric clamping onset across polarity. |
| VC @ IPPM | 16.7 V at 90.0 A - Clamping voltage during 10/1000 μs surge; limits downstream IC stress to ≤1.4× nominal rail. |
| PPPM | 1500 W - Peak pulse power handling per JEDEC standard; validates suitability for ISO 7637-2 Pulse 1/2/5a automotive transients. |
| TJ max | +150 °C - Maximum junction temperature; enables placement near heat sources in engine control units and ADAS modules. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥8 kV. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow. |
Pinout & Package
SM15T12CAHE3/9AT uses a two-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional TVS function. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One side of symmetrical PN junction; connects to protected line (e.g., CAN_H or LIN bus) without polarity constraint. |
| Terminal 2 | Cathode (bidirectional) | Other side of symmetrical PN junction; connects to reference (e.g., chassis ground or signal return) - interchangeable with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential buses (e.g., RS-485, CAN FD) without external polarity management. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including powertrain, body control, and ADAS sensor interfaces. |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (50 Ω source, 10/1000 μs) for 12 V systems - protects against load dump and alternator transients. |
| Low clamping ratio (1.39×VWM) | Minimizes overvoltage exposure to downstream ICs such as microcontrollers and transceivers during surge events. |
| MSL Level 1, 260 °C peak | Supports lead-free reflow assembly without pre-baking; reduces manufacturing complexity and cost in high-volume automotive production. |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to ignition noise and load dump. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and ECU input, shunting surge energy to chassis ground. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends by limiting transient voltage to ≤16.7 V during 90 A surges. |
Use Scenario: Guarding high-speed CAN_H/CAN_L differential pair against ESD and coupled transients in vehicle networking gateways. IC Role / Device Role / Timing Role: Low-inductance TVS pair (one per line) referenced to common ground, maintaining signal integrity up to 5 Mbps. Use Value: Maintains CAN bus fault tolerance by clamping common-mode surges while preserving <5 pF junction capacitance per line. |
| Industrial Motor Drive I/O | Telecom Line Interface |
Use Scenario: Shielding digital I/O and encoder feedback lines in variable-frequency drives subjected to inductive kickback from contactors and solenoids. IC Role / Device Role / Timing Role: Bidirectional transient suppressor installed at connector entry point, diverting energy before reaching FPGA or isolator inputs. Use Value: Eliminates need for separate unidirectional devices per signal direction, reducing BOM count and PCB area by 50%. |
Use Scenario: Safeguarding Ethernet PHY interface pins (e.g., MDI pairs) in outdoor telecom equipment exposed to lightning-induced surges on copper lines. IC Role / Device Role / Timing Role: Primary-level surge clamp on unshielded twisted-pair inputs, coordinated with secondary GDT or MOV stages. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W without degradation, extending field service life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ12CA | Same 12 V VWM, 1500 W rating, but not AEC-Q101 qualified; RθJA = 85 °C/W vs. 75 °C/W for SM15T12CAHE3/9AT. | Approved for commercial/industrial use only; unsuitable for automotive under-hood deployment per OEM requirements. | Select SMAJ12CA only for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
| ON Semiconductor SMCJ12CA | Identical VWM, VC, and PPPM; AEC-Q101 qualified but rated for TJ max = +175 °C (vs. +150 °C) and higher IFSM (400 A). | Preferred for high-temperature zones (e.g., transmission control); requires verification of layout thermal relief due to higher IFSM derating. | Choose SMCJ12CA when extended thermal margin or higher surge current endurance is required beyond SM15T12CAHE3/9AT's 90 A IPPM. |
Compared with SMAJ12CA and SMCJ12CA, SM15T12CAHE3/9AT offers optimized thermal resistance (75 °C/W) and verified AEC-Q101 compliance for mainstream automotive sensor nodes - balancing reliability, manufacturability, and cost without over-specifying surge current capability.
Availability
SM15T12CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, CAN bus hardening, and industrial motor drive I/O requiring stable component supply, full traceability, and AEC-Q101 assurance.
Supply support for SM15T12CAHE3/9AT 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM15T Series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V automotive subsystems - emphasizing low clamping voltage, bidirectional symmetry, and robust reflow survivability.
FAQ
What does the "CA" suffix indicate in SM15T12CAHE3/9AT?
The "CA" suffix in SM15T12CAHE3/9AT denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. This eliminates the need to observe polarity during PCB placement and makes SM15T12CAHE3/9AT ideal for protecting AC-coupled or differential signal lines like CAN or LIN buses without external circuitry.
Is SM15T12CAHE3/9AT suitable for automotive under-hood applications?
Yes, SM15T12CAHE3/9AT is AEC-Q101 qualified and rated for TJ max = +150 °C, making it suitable for under-hood automotive applications such as engine control units and transmission control modules. Its glass-passivated junction and MSL Level 1 rating ensure reliability through multiple reflow cycles and thermal cycling in harsh environments.
What is the clamping voltage of SM15T12CAHE3/9AT at its rated peak pulse current?
The clamping voltage (VC) of SM15T12CAHE3/9AT is 16.7 V at 90.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads and represents the maximum voltage seen by protected circuitry during a worst-case surge event.
How does the SM15T12CAHE3/9AT differ from unidirectional variants like SM15T12AHE3/9AT?
SM15T12CAHE3/9AT is bidirectional with symmetrical VBR and clamping behavior in both directions, while SM15T12AHE3/9AT is unidirectional and features a cathode band marking. The bidirectional version allows placement on floating or AC signals without polarity constraints, whereas the unidirectional variant must be oriented correctly relative to ground and is typically used on DC rails.
What packaging format is used for SM15T12CAHE3/9AT?
SM15T12CAHE3/9AT is supplied in 13-inch diameter plastic tape and reel format with a base quantity of 3500 units per reel (package code "9AT"). The terminals are matte tin-plated and compliant with J-STD-002 and JESD 22-B102 solderability standards, supporting high-yield automated assembly.
SM15T12CAHE3/9AT 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)
SM15T12CAHE3/9AT FAQ
1.How can I place an order for SM15T12CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12CAHE3/9AT 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 SM15T12CAHE3/9AT reliable?
The price and inventory of SM15T12CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T12CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12CAHE3/9AT?
SM15T12CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12CAHE3/9AT 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 SM15T12CAHE3/9AT?
For technical support, including SM15T12CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12CAHE3/9AT requirements.
6.How does Aetrix verify that SM15T12CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T12CAHE3/9AT 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 SM15T12CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T12CAHE3/9AT?
All SM15T12CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12CAHE3/9AT, 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 SM15T12CAHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T12CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12CAHE3/9AT Tags
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