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Vishay General Semiconductor - Diodes Division SM6T15A-M3/52
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- Part No.:
- SM6T15A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15A-M3/52.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,563
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Product details
Overview
SM6T15A-M3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 15 V breakdown voltage (VBR = 14.3–15.8 V at 1.0 mA), 21.2 V maximum clamping voltage (VC) at 28.0 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T15A-M3/52 datasheet, SM6T15A-M3/52 pinout, SM6T15A-M3/52 application, or SM6T15A-M3/52 equivalent, key selection criteria include unidirectional polarity, 12.8 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification eligibility via HM3 variant.
Technical Context
The SM6T15A-M3/52 operates as a clamping-type TVS diode with glass-passivated junction, optimized for low-inductance surge suppression in surface-mount applications. Its 10/1000 μs waveform rating defines standardized transient energy handling, and thermal resistance of 100 °C/W (junction-to-ambient) governs derating above 25 °C ambient.
Designed for automated placement on PCBs with 0.2" × 0.2" copper pads per terminal, it meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance. The cathode band denotes polarity; no marking is used for bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - ensures reliable avalanche conduction onset within defined tolerance for 15 V nominal systems |
| VWM | 12.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 21.2 V at 28.0 A - clamping voltage limits protected circuit stress during 600 W transient events |
| PPPM | 600 W - peak pulse power handling capability with standard 10/1000 μs waveform |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 100 °C/W - defines thermal derating slope for power dissipation in still air without heatsink |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference in unidirectional clamp configuration |
| Cathode | Avalanche conduction node / protected line connection | Connected to line being protected (e.g., sensor supply or signal trace); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V automotive systems |
| Glass passivated chip junction | Ensures stable VBR over time and temperature, critical for long-life automotive deployments |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), preserving IC safety margin |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free soldering without moisture-related popcorn failure |
| AEC-Q101 qualification path | HM3 variant available for automotive-grade reliability validation (e.g., SM6T15AHM3_B/H) |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between sensor output and ECU input. Use Value: Limits transient voltage to ≤21.2 V, preventing damage to 3.3 V or 5 V ADC front-ends while maintaining <1.0 μA leakage at 12.8 V nominal supply. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to shunt inductive kickback energy. Use Value: Absorbs 600 W pulses without degradation, enabling >100,000 switching cycles with stable VBR and no parameter drift. |
| Consumer Power Adapter Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters where 15 V rails interface with controller ICs. IC Role / Device Role / Timing Role: Fast-response clamping diode placed between 15 V rail and ground near power management IC. Use Value: Clamps 10/1000 μs surges to 21.2 V within nanoseconds, preventing latch-up or gate oxide rupture in synchronous rectifier drivers. | Use Scenario: DC bias line protection in PoE-powered Ethernet switches handling induced lightning surges on 48 V phantom power lines. IC Role / Device Role / Timing Role: Primary-stage unidirectional suppressor on PSE side, upstream of DC-DC converter. Use Value: Withstands repeated 28.0 A pulses at 21.2 V clamp, meeting IEC 61000-4-5 Level 3 (1 kV/2 Ω) requirements without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same SMB package, but lower 400 W PPPM; VC = 24.4 V at 24.4 A | Limited to less severe transients (e.g., consumer electronics vs. automotive); not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive reliability or higher surge margin |
| 1.5SMC15A | Higher 1500 W PPPM in larger SMC (DO-214AB) package; VC = 24.4 V at 61.5 A | Requires PCB area increase (~30% larger footprint); better suited for industrial motor drives with high-energy spikes | Choose when system-level surge testing exceeds 600 W and board space permits larger package |
Compared with SMAJ15A and 1.5SMC15A, the SM6T15A-M3/52 delivers optimal balance of 600 W surge capacity, SMB footprint, and halogen-free compliance-making it preferred for space-constrained automotive and industrial modules requiring validated long-term stability.
Availability
SM6T15A-M3/52 is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC inputs, consumer power adapter secondary-side protection, and telecom PoE line interfaces requiring stable component supply across production lifecycles.
Supply support for SM6T15A-M3/52 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 reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments-designed specifically for automotive, industrial, and telecom applications demanding consistent clamping performance, low leakage, and robust thermal behavior.
FAQ
What is the maximum clamping voltage of the SM6T15A-M3/52 under standard test conditions?
The SM6T15A-M3/52 has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 28.0 A using the 10/1000 μs waveform. This value is measured per JEDEC standards and ensures protected downstream components experience limited overvoltage stress during transient events. The SM6T15A-M3/52 maintains this clamping performance across its full operating temperature range.
Is the SM6T15A-M3/52 suitable for automotive applications?
Yes-the SM6T15A-M3/52 is halogen-free and RoHS-compliant, and its base family is AEC-Q101 qualified when ordered with HM3 suffix (e.g., SM6T15AHM3_B/H). While the SM6T15A-M3/52 itself is commercial-grade, its electrical and thermal specifications-including 150 °C max junction temperature and MSL Level 1 reflow compatibility-align with automotive subsystem requirements. For certified deployment, specify the HM3 variant.
How does the SM6T15A-M3/52 differ from bidirectional TVS diodes like SM6T15CA?
The SM6T15A-M3/52 is unidirectional and features polarity marking (cathode band), allowing it to conduct only in reverse breakdown while blocking forward current. In contrast, SM6T15CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The SM6T15A-M3/52 is selected for DC-biased lines (e.g., 12 V supply rails), whereas SM6T15CA suits AC-coupled or floating signal paths.
What is the standoff voltage (VWM) rating for the SM6T15A-M3/52?
The SM6T15A-M3/52 has a maximum working peak reverse voltage (VWM) of 12.8 V. This means it can continuously block up to 12.8 V in reverse bias while maintaining ≤1.0 μA leakage current at 25 °C. This rating ensures compatibility with 12 V automotive and industrial systems where normal operating voltage must remain below the clamping threshold.
Does the SM6T15A-M3/52 require a heatsink for standard operation?
No-under typical pulsed transient conditions, the SM6T15A-M3/52 relies on PCB copper pad thermal mass rather than external heatsinks. Its RθJA of 100 °C/W assumes mounting on 0.2" × 0.2" copper pads per terminal. Continuous power dissipation is limited to 5.0 W at 50 °C ambient; for sustained DC stress, thermal design must verify junction temperature stays ≤150 °C. The SM6T15A-M3/52 is not intended for continuous power regulation.
SM6T15A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, 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):
- 28A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T15A-M3/52 FAQ
1.How can I place an order for SM6T15A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15A-M3/52 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 SM6T15A-M3/52 reliable?
The price and inventory of SM6T15A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15A-M3/52 is usually 5 days.
3.What payment methods are accepted for SM6T15A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15A-M3/52?
SM6T15A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15A-M3/52 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 SM6T15A-M3/52?
For technical support, including SM6T15A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15A-M3/52 requirements.
6.How does Aetrix verify that SM6T15A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T15A-M3/52 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 SM6T15A-M3/52 meets industry standards.
7.What is the process for return or replacement of SM6T15A-M3/52?
All SM6T15A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15A-M3/52, 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 SM6T15A-M3/52 part is unused and in its original packaging.
Return procedure for SM6T15A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15A-M3/52 Tags
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