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Vishay General Semiconductor - Diodes Division SM15T15A-E3/9AT
- Part No.:
- SM15T15A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15A-E3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,347
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Product details
Overview
SM15T15A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM), 21.2 V clamping voltage at 71 A peak pulse current, and operating up to +150 °C junction temperature. It protects MOSFETs and signal lines in automotive power electronics against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15A-E3/9AT datasheet, SM15T15A-E3/9AT pinout, SM15T15A-E3/9AT application, or SM15T15A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 12.8 V maximum reverse standoff, 1.0 μA leakage at VWM, low-inductance SMC package, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The SM15T15A-E3/9AT employs a glass-passivated silicon junction optimized for fast response (<1 ps typical) to transient overvoltages, with clamping action triggered when reverse voltage exceeds 14.3 V (min) breakdown threshold. Its thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead) supports sustained operation under repeated surge conditions when mounted on 8.0 mm × 8.0 mm copper pads.
Designed for high-impedance source environments, it limits peak pulse current to 71 A under 10/1000 μs waveform while maintaining clamping voltage ≤21.2 V - ensuring protected ICs remain below absolute maximum ratings. Failure mode under overstress is short-circuit, compatible with fuse-based system-level protection schemes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V maximum reverse stand-off voltage - defines highest continuous operating voltage before leakage rises significantly |
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA test current - ensures reliable turn-on within specified tolerance band |
| VC @ IPPM | 21.2 V at 71.0 A (10/1000 μs) - guarantees safe clamping level for downstream 16 V-rated components |
| PPPM | 1500 W peak pulse power - withstands lightning surges per IEC 61000-4-5 Level 4 (4 kV) |
| IFSM | 200 A non-repetitive forward surge (10 ms half-sine) - supports inrush current handling in DC power rails |
| TJ max | +150 °C maximum junction temperature - enables use in under-hood automotive environments |
| Package | SMC (DO-214AB), RoHS-compliant matte tin leads - compatible with automated SMT placement and reflow profiles up to 260 °C |
Pinout & Package
SM15T15A-E3/9AT uses the standard SMC (DO-214AB) surface-mount package with two terminals: cathode (marked by band) and anode. The device is unidirectional; polarity must be observed during PCB layout to ensure proper transient clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 lightning surges without derating in standard PCB layouts |
| Glass-passivated chip junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for automotive reliability |
| Low inductance construction | Minimizes voltage overshoot during fast transients (<1 ns rise time), preserving clamping effectiveness |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
| RoHS-compliant, halogen-free option available | Supports environmental compliance requirements for industrial and automotive OEM programs |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges. Use Value: Clamps to 21.2 V at 71 A, keeping downstream regulators and microcontrollers within safe operating area. |
Use Scenario: Shielding PLC analog input channels from inductive kickback during solenoid switching. IC Role / Device Role / Timing Role: Fast-response transient suppressor on signal line to ground, limiting voltage excursion during coil de-energization. Use Value: Sub-20 ns response time prevents latch-up in precision op-amps and ADC front-ends. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Safeguarding AC/DC adapter primary-side rectifier outputs against surge coupling from mains. IC Role / Device Role / Timing Role: High-power unidirectional TVS across bulk capacitor to absorb differential-mode transients. Use Value: 1500 W rating handles repetitive 1.2/50 μs surges without degradation, supporting EN 61000-4-5 compliance. |
Use Scenario: Guarding microcontroller GPIOs connected to push-button interfaces subject to ESD and cable discharge. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS on user-input lines to suppress contact discharge events. Use Value: 12.8 V VWM allows full 3.3 V or 5 V logic swing while blocking false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A-E3/52T (Vishay) | Lower peak power (600 W), same VWM/VC, SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer designs with lower threat severity | Select when board area is limited and surge energy does not exceed 600 W capability |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 variant or MSL Level 1 rating | Used in legacy industrial power supplies where SMT is not required | Choose for cost-sensitive through-hole assembly or where reflow compatibility is not needed |
Compared with SM15T15A-E3/9AT, SMBJ15A-E3/52T offers reduced surge margin in a smaller SMT package, while 1.5KE15A provides equivalent clamping performance in through-hole form but lacks automotive qualification and moisture sensitivity compliance.
Availability
SM15T15A-E3/9AT is available at Aetrix Electronics and suitable for automotive power electronics, industrial motor control systems, and telecom infrastructure requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for SM15T15A-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 optimization.
The SM15T Series was developed for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 qualification are essential.
FAQ
What is the clamping voltage of SM15T15A-E3/9AT at its rated peak pulse current?
The SM15T15A-E3/9AT has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 71.0 A using the standard 10/1000 μs waveform. This value is measured under defined test conditions with 0.31" × 0.31" copper pads and ensures predictable overvoltage limiting for protected circuitry. The SM15T15A-E3/9AT maintains this clamping performance across its operational temperature range.
Is SM15T15A-E3/9AT suitable for automotive applications?
SM15T15A-E3/9AT itself is commercial-grade (E3 suffix), but the SM15T15A-HE3 variant is AEC-Q101 qualified for automotive use. The SM15T15A-E3/9AT shares identical electrical characteristics and SMC packaging, making it suitable for non-automotive industrial or telecom applications requiring the same surge protection level. For automotive deployment, specify the HE3 suffix version of SM15T15A-E3/9AT.
What is the maximum reverse leakage current for SM15T15A-E3/9AT at its standoff voltage?
The SM15T15A-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated standoff voltage (VWM) of 12.8 V, measured at 25 °C. This low leakage ensures minimal power loss in standby modes and avoids interference with high-impedance sensor or reference circuits. The SM15T15A-E3/9AT maintains leakage below 10 μA up to +125 °C ambient.
Does SM15T15A-E3/9AT have a bidirectional version?
No - SM15T15A-E3/9AT is strictly unidirectional. Bidirectional variants in the SM15T series use the "CA" suffix (e.g., SM15T15CA). The "A" suffix in SM15T15A-E3/9AT explicitly denotes unidirectional polarity, with the cathode identified by a band on the SMC package. Using SM15T15A-E3/9AT in bidirectional applications would result in improper clamping during negative transients.
What is the thermal resistance of SM15T15A-E3/9AT and how does it affect layout?
The SM15T15A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To achieve rated power dissipation, PCB layout must use minimum 8.0 mm × 8.0 mm copper pads per terminal as specified. Reducing pad size increases RθJA, lowering allowable surge repetition rate and risking thermal runaway. The SM15T15A-E3/9AT requires adherence to this layout for full 1500 W capability.
SM15T15A-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SM15T15A-E3/9AT FAQ
1.How can I place an order for SM15T15A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15A-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 SM15T15A-E3/9AT reliable?
The price and inventory of SM15T15A-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 SM15T15A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T15A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15A-E3/9AT?
SM15T15A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15A-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 SM15T15A-E3/9AT?
For technical support, including SM15T15A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15A-E3/9AT requirements.
6.How does Aetrix verify that SM15T15A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T15A-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 SM15T15A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T15A-E3/9AT?
All SM15T15A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15A-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 SM15T15A-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T15A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15A-E3/9AT Tags
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