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Vishay General Semiconductor - Diodes Division SM6T15AHM3_A/I
- Part No.:
- SM6T15AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15AHM3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,849
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Product details
Overview
SM6T15AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 15 V standoff voltage (VWM = 12.8 V), 21.2 V max clamping voltage at 28 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T15AHM3_A/I datasheet, SM6T15AHM3_A/I pinout, SM6T15AHM3_A/I application, or SM6T15AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and suitability for automotive-grade ESD/surge protection in sensor interfaces and power rails.
Technical Context
The SM6T15AHM3_A/I operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its breakdown threshold (VBR min = 14.3 V, max = 15.8 V at 1 mA). Its low-inductance SMB package enables fast response to transients, with clamping action limiting downstream voltage to ≤21.2 V during 28 A 10/1000 μs pulses.
Thermal design relies on junction-to-lead resistance of 20 °C/W and junction-to-ambient of 100 °C/W; derating begins above 25 °C ambient. The device meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - precise avalanche initiation range defining turn-on consistency |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - clamped voltage protecting downstream ICs from overvoltage damage |
| PPPM | 600 W - surge energy handling capacity per single transient event |
| ID @ VWM | 1.0 μA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - extended thermal operating range supporting under-hood automotive environments |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and IPC-7351B standard pads |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, 0.220" × 0.130" body, cathode band marking on unidirectional variants. Complies with UL 94 V-0 flammability rating and J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
| Cathode | Avalanche conduction terminal / Surge sink node | Marked with band; connected to line being protected (e.g., 12 V rail or sensor output); defines unidirectional polarity |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a surges in automotive power nets without derating |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥ 8 kV |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709E material restrictions for green manufacturing |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage margin between trigger and clamp, improving system-level surge immunity |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 15 V. Use Value: Limits voltage to ≤21.2 V during 28 A transients, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted across sensor output and ground to absorb ESD and switching noise. Use Value: 1.0 μA leakage preserves microamp-level sensor bias accuracy; 21.2 V clamping prevents ADC saturation. |
| Consumer USB Power Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Securing 5 V USB VBUS lines in portable docking stations against hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional suppressor on VBUS rail with cathode tied to +5 V, anode to ground. Use Value: Fast avalanche response (<1 ns) and 21.2 V clamping prevent overvoltage damage to USB PD controllers. | Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: TVS placed on differential pair inputs referenced to chassis ground. Use Value: 600 W rating handles IEC 61000-4-5 Combination Wave (10/700 μs) surges up to 4 kV without degradation. |
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-E3/52 | Same VWM (12.8 V) and VC (21.2 V), but 400 W PPPM rating and non-AEC-Q101 commercial grade | Lacks automotive qualification; suitable for industrial/commercial designs without AEC-Q101 mandate | Select SMAJ15A-E3/52 for cost-sensitive non-automotive applications where 400 W surge margin suffices |
| SMCJ15A-HM3_A/I | Same AEC-Q101/HM3 suffix and VWM, but SMC (DO-214AB) package with 1500 W PPPM and higher IPPM (100 A) | Requires larger PCB footprint; used where higher surge immunity (e.g., ISO 16750-2) is required | Choose SMCJ15A-HM3_A/I when system-level testing demands >600 W surge handling or higher peak current capability |
Compared with SMAJ15A-E3/52, SM6T15AHM3_A/I delivers certified automotive reliability and identical clamping performance in a smaller SMB footprint; versus SMCJ15A-HM3_A/I, it trades surge margin for space-constrained layouts while retaining AEC-Q101 compliance.
Availability
SM6T15AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer USB power protection, and telecom line card surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SM6T15AHM3_A/I 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 high-reliability and automotive-grade solutions.
The SM6T Series is engineered for transient voltage suppression in harsh environments, targeting automotive power distribution, industrial control I/O, and consumer port protection where compact size, AEC-Q101 compliance, and repeatable clamping are critical.
FAQ
What is the clamping voltage of SM6T15AHM3_A/I under a standard 10/1000 μs surge?
The SM6T15AHM3_A/I has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 28 A using a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and ensures downstream components remain within safe operating voltage limits during transient events.
Is SM6T15AHM3_A/I qualified for automotive applications?
Yes, SM6T15AHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and documented in Vishay's ordering information table. It undergoes stress testing including high-temperature operating life, temperature cycling, and ESD per AEC-Q101 Rev G, making it suitable for under-hood and chassis-mounted automotive electronics.
What does the "_A/I" suffix mean in SM6T15AHM3_A/I?
The "_A/I" suffix in SM6T15AHM3_A/I denotes the revision code ("A") and packaging configuration ("I" = 13-inch tape and reel, 3200 units per reel). This matches Vishay's ordering convention shown in the "ORDERING INFORMATION" section of datasheet 88385.
How does SM6T15AHM3_A/I differ from bidirectional TVS diodes like SM6T15CA?
SM6T15AHM3_A/I is unidirectional with cathode band marking and conducts only in reverse avalanche mode; SM6T15CA is bidirectional, offering symmetrical clamping for AC-coupled lines. The unidirectional version provides lower leakage (1.0 μA vs. 2.0 μA for CA types at VWM) and is preferred for DC power rail protection.
What is the thermal resistance specification for SM6T15AHM3_A/I?
SM6T15AHM3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. These values guide PCB thermal pad design and derating calculations above 25 °C ambient per Figure 2 in datasheet 88385.
SM6T15AHM3_A/I 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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T15AHM3_A/I FAQ
1.How can I place an order for SM6T15AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15AHM3_A/I 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 SM6T15AHM3_A/I reliable?
The price and inventory of SM6T15AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T15AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15AHM3_A/I?
SM6T15AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15AHM3_A/I 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 SM6T15AHM3_A/I?
For technical support, including SM6T15AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15AHM3_A/I requirements.
6.How does Aetrix verify that SM6T15AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T15AHM3_A/I 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 SM6T15AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T15AHM3_A/I?
All SM6T15AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15AHM3_A/I, 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 SM6T15AHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T15AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15AHM3_A/I Tags
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