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Vishay General Semiconductor - Diodes Division SM15T15A-M3/9AT
- Part No.:
- SM15T15A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15A-M3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,777
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Product details
Overview
SM15T15A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 14.3–15.8 V breakdown voltage at 1.0 mA, and 21.2 V maximum clamping voltage at 71.0 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 SM15T15A-M3/9AT datasheet, SM15T15A-M3/9AT pinout, SM15T15A-M3/9AT application, or SM15T15A-M3/9AT equivalent, key selection criteria include clamping voltage at rated IPPM, unidirectional polarity with cathode band marking, halogen-free RoHS compliance (M3 suffix), and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
The SM15T15A-M3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its standoff voltage (VWM = 12.8 V), limiting transient overvoltage to ≤21.2 V at 71.0 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge handling up to 200 A IFSM (10 ms half-sine).
Designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads, it achieves 1500 W peak pulse power per JEDEC-standard 10/1000 μs waveform while maintaining low inductance and MSL Level 1 moisture sensitivity rating (peak reflow = 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum reverse operating voltage before significant leakage; defines safe DC/AC working range. |
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 21.2 V at 71.0 A - Clamped voltage under 10/1000 μs surge; determines protected circuit's maximum overvoltage stress. |
| PPPM | 1500 W - Peak pulse power handling capability; validates suitability for lightning and motor-switching threats. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs minimum pad area (8.0 mm × 8.0 mm) for derated operation. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to system ground or low-impedance reference; completes clamping loop during positive surges. |
| Cathode | Transient voltage clamp node | Connected to protected line (e.g., 12 V rail or sensor input); conducts avalanche current when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validated protection level against IEC 61000-4-5 Level 4 (4 kV) surges without degradation. |
| Glass passivated chip junction | Ensures <1.0 μA reverse leakage at 12.8 V and stable VBR over 1000-hour life testing. |
| Low inductance layout | Minimizes voltage overshoot during fast transients (e.g., <10 ns rise time switching noise). |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without popcorn cracking or delamination. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-supplied ECUs exposed to load-dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 12.8 V. Use Value: Limits rail voltage to ≤21.2 V during 71 A transients, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed across noisy factory floors with motor drives. IC Role / Device Role / Timing Role: Point-of-entry TVS on signal line to absorb ESD and inductive kickback before reaching ADC input. Use Value: Maintains signal integrity by suppressing >1 kV transients while adding <0.5 pF capacitance at 0 V bias. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: AC-DC adapter primary-side input subjected to lightning-induced surges via mains coupling. IC Role / Device Role / Timing Role: Secondary-side TVS on DC output rail to protect downstream USB-C PD controllers. Use Value: Absorbs 1500 W pulses without failure mode shift, ensuring short-circuit fail-safe behavior per UL 1449. | Use Scenario: Ethernet PHY interface on telecom base station line cards connected to outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS on VDDIO rail to suppress induced surges from nearby lightning strikes. Use Value: Withstands repeated 10/1000 μs surges up to 71 A while maintaining <1.0 μA leakage at 12.8 V standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Lower PPPM (400 W), same VWM/VBR, SMA package (higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a/b | Select SM15T15A-M3/9AT when 1500 W clamping and SMC thermal performance are required. |
| SMCJ15A | Same PPPM (1500 W), identical VWM/VBR/VC, but E3 suffix (non-halogen-free) | RoHS-compliant but not halogen-free; may not meet strict automotive material specs | Choose SM15T15A-M3/9AT for halogen-free compliance in AEC-Q101-adjacent designs. |
Compared with SMAJ15A and SMCJ15A, the SM15T15A-M3/9AT delivers identical clamping performance with halogen-free construction and optimized thermal dissipation in the SMC footprint-critical for high-reliability automotive and industrial deployments where material content and thermal margin are design constraints.
Availability
SM15T15A-M3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom line card surge protection requiring stable component supply and full traceability.
Supply support for SM15T15A-M3/9AT 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, power handling, and automotive qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting applications demanding 1500 W pulse capability, AEC-Q101 readiness, and halogen-free compliance.
FAQ
What is the clamping voltage of the SM15T15A-M3/9AT at its rated peak pulse current?
The SM15T15A-M3/9AT has a maximum clamping voltage (VC) of 21.2 V at 71.0 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 per JEDEC test conditions and defines the upper voltage limit imposed on protected circuits during surge events.
Is the SM15T15A-M3/9AT halogen-free and RoHS-compliant?
Yes, the SM15T15A-M3/9AT carries the M3 suffix, indicating it is both halogen-free and RoHS-compliant per Vishay's material categorization standards. This makes it suitable for automotive and industrial applications with strict environmental material requirements, including those aligned with JESD201 Class 2 whisker resistance.
What is the standoff voltage (VWM) and why does it matter for SM15T15A-M3/9AT selection?
The SM15T15A-M3/9AT has a standoff voltage (VWM) of 12.8 V, meaning it remains non-conductive below this reverse voltage. This parameter ensures no leakage or power loss during normal operation while allowing sufficient margin below the 14.3 V minimum breakdown voltage-critical for reliable operation on 12 V systems subject to ripple and tolerance variation.
Can SM15T15A-M3/9AT be used in bidirectional configurations?
No, the SM15T15A-M3/9AT is a unidirectional TVS diode, identified by its cathode band marking. For bidirectional operation, Vishay specifies the CA suffix (e.g., SM15T15CA). Using SM15T15A-M3/9AT in reverse-biased AC applications would result in forward conduction and potential failure.
What is the thermal resistance and how does it affect PCB layout for SM15T15A-M3/9AT?
The SM15T15A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. To maintain safe junction temperatures under sustained power dissipation, PCB layout must provide at least this pad area per terminal-reducing pad size increases thermal impedance and risks exceeding the +150 °C maximum junction temperature.
SM15T15A-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for SM15T15A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15A-M3/9AT 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-M3/9AT reliable?
The price and inventory of SM15T15A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T15A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15A-M3/9AT?
SM15T15A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15A-M3/9AT 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-M3/9AT?
For technical support, including SM15T15A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15A-M3/9AT requirements.
6.How does Aetrix verify that SM15T15A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T15A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T15A-M3/9AT?
All SM15T15A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T15A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15A-M3/9AT Tags
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