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Vishay General Semiconductor - Diodes Division SM15T12A-E3/9AT
- Part No.:
- SM15T12A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12A-E3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,974
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Product details
Overview
SM15T12A-E3/9AT from Vishay General Semiconductor is a unidirectional 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 = 10.2 V), and clamping voltage of 16.7 V at 90 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power supplies.
For engineers reviewing the SM15T12A-E3/9AT datasheet, SM15T12A-E3/9AT pinout, SM15T12A-E3/9AT application, or SM15T12A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 10.2 V reverse stand-off voltage, 16.7 V clamping performance at 90 A, RoHS-compliant matte tin plating, and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
The SM15T12A-E3/9AT employs a glass-passivated silicon junction optimized for low-inductance transient suppression with fast response to 10/1000 μs waveforms. Its unidirectional configuration uses cathode-band marking and exhibits 5.0 μA max reverse leakage at VWM, enabling stable operation in DC-biased protection paths.
Thermal design relies on mounting to 8.0 mm × 8.0 mm copper pads per terminal, supporting 6.5 W steady-state dissipation at 50 °C ambient and 150 °C maximum junction temperature. The device fails short-circuit under overstress, aligning with IEC 61000-4-5 system-level surge requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system DC rail margin. |
| VBR min/max | 11.4 V / 12.6 V at 1.0 mA - Confirmed breakdown threshold ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 16.7 V at 90 A (10/1000 μs) - Clamping voltage limits downstream component stress during 1500 W surge events. |
| IPPM | 90 A - Peak pulse current capacity defines maximum transient energy absorption capability under standard waveform. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance determines required PCB copper area for thermal management. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments and high-ambient industrial settings. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to system ground or low-impedance reference; carries full surge current during clamping. |
| Cathode | Protected circuit connection point | Connected to line being protected (e.g., 12 V supply rail); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating in typical PCB layouts. |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR over temperature and life cycle, critical for automotive AEC-Q101-comparable designs. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), preserving clamping effectiveness. |
| RoHS-compliant, MSL Level 1 | Supports lead-free reflow assembly up to 260 °C peak, eliminating moisture sensitivity concerns in automated SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges above 13.5 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤16.7 V, preventing latch-up or oxide damage. |
Use Scenario: Analog output lines from pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry protection on 0–5 V or 4–20 mA signal traces against ESD and cable discharge events. Use Value: Maintains signal integrity with <5.0 μA leakage at 10.2 V, avoiding offset errors in precision measurement circuits. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Secondary-side 12 V output of AC/DC adapters powering routers and set-top boxes. IC Role / Device Role / Timing Role: Overvoltage clamp on regulated DC output to protect USB ports and SoCs during regulator failure. Use Value: Responds within nanoseconds to sustain 90 A pulses, absorbing >1500 W without degradation across 1000+ surge cycles. |
Use Scenario: -48 V DC feed lines in telecom base station remote radio units. IC Role / Device Role / Timing Role: Reverse-polarity and surge protector on power input, leveraging unidirectional blocking behavior. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), surviving accidental hot-plug events and lightning-induced ground potential shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ12A | Same SMC package, 12 V VWM, but lower PPPM (400 W) and higher VC (19.9 V at 21.7 A). | Rated for lighter-duty consumer electronics; insufficient for automotive load-dump compliance. | Select SMAJ12A only when surge threat level is limited to IEC 61000-4-2 ESD or low-energy switching noise. |
| ON Semiconductor 1.5SMC12A | Identical electrical specs (VWM = 10.2 V, VC = 16.7 V @ 90 A), same SMC package, but RoHS-compliant only with M3 suffix (1.5SMC12A-M3). | Direct functional match; differs in material categorization and whisker test compliance (JESD 201 Class 2). | Choose 1.5SMC12A-M3 for halogen-free requirement; SM15T12A-E3/9AT preferred for Vishay's AEC-Q101-qualified variants (HE3/HM3). |
Compared with SMAJ12A and 1.5SMC12A-M3, the SM15T12A-E3/9AT delivers higher surge robustness (1500 W vs. 400 W or 1500 W), identical clamping performance, and broader qualification coverage-making it optimal for automotive and industrial systems requiring sustained surge immunity.
Availability
SM15T12A-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC feed protection requiring stable component supply, consistent RoHS compliance, and traceable sourcing.
Supply support for SM15T12A-E3/9AT 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 diodes, rectifiers, and protection devices with emphasis on reliability and application-specific performance.
The SM15T Series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge handling and AEC-Q101 qualification are mandatory.
FAQ
What is the peak pulse power rating of the SM15T12A-E3/9AT?
The SM15T12A-E3/9AT has a peak pulse power rating of 1500 W under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and reflects its ability to absorb high-energy transients without failure, making it suitable for lightning and load-dump protection scenarios.
Is the SM15T12A-E3/9AT unidirectional or bidirectional?
The SM15T12A-E3/9AT is a unidirectional transient voltage suppressor, indicated by the "A" suffix and cathode band marking. It conducts only during positive voltage excursions relative to its cathode, providing targeted protection for DC-powered circuits like 12 V automotive rails and industrial power supplies.
What is the clamping voltage of the SM15T12A-E3/9AT at its rated peak pulse current?
The SM15T12A-E3/9AT clamps to a maximum of 16.7 V at 90 A peak pulse current (IPPM) under the 10/1000 μs waveform. This clamping voltage is guaranteed across temperature and ensures downstream components see no more than 16.7 V during surge events, preserving functional safety margins.
Does the SM15T12A-E3/9AT meet automotive qualification standards?
The base SM15T12A-E3/9AT is RoHS-compliant and commercial-grade. For automotive use, Vishay offers AEC-Q101 qualified versions under ordering codes SM15T12AHE3_A/I (RoHS + AEC-Q101) or SM15T12AHM3_A/I (halogen-free + RoHS + AEC-Q101); the E3/9AT variant itself is not AEC-Q101 certified.
What package type does the SM15T12A-E3/9AT use, and what are its key mechanical features?
The SM15T12A-E3/9AT uses the SMC (DO-214AB) surface-mount package: low-profile, UL 94 V-0 compliant molding compound, matte tin-plated leads, and MSL Level 1 rating for lead-free reflow up to 260 °C. Its dimensions are 7.75 mm × 6.22 mm × 2.62 mm (L × W × H), optimized for automated placement and thermal dissipation.
SM15T12A-E3/9AT 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SM15T12A-E3/9AT FAQ
1.How can I place an order for SM15T12A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12A-E3/9AT 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 SM15T12A-E3/9AT reliable?
The price and inventory of SM15T12A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T12A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12A-E3/9AT?
SM15T12A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12A-E3/9AT 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 SM15T12A-E3/9AT?
For technical support, including SM15T12A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12A-E3/9AT requirements.
6.How does Aetrix verify that SM15T12A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T12A-E3/9AT 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 SM15T12A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T12A-E3/9AT?
All SM15T12A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12A-E3/9AT, 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 SM15T12A-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T12A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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