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Vishay General Semiconductor - Diodes Division SM6T15AHM3/I
- Part No.:
- SM6T15AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15AHM3/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,090
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Product details
Overview
SM6T15AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 15 V standoff voltage (VWM = 12.8 V), 21.2 V clamping voltage at 28 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It features glass passivated junction, AEC-Q101 qualification, and is used to protect MOSFETs and sensor signal lines in automotive ECUs against inductive switching transients.
For engineers reviewing the SM6T15AHM3/I datasheet, SM6T15AHM3/I pinout, SM6T15AHM3/I application, or SM6T15AHM3/I equivalent, key selection criteria include clamping voltage under 21.2 V at 28 A, unidirectional polarity with cathode band marking, halogen-free RoHS-compliant construction, and SMB package compatibility with automated SMT placement.
Technical Context
The SM6T15AHM3/I operates as a unidirectional avalanche diode with precise breakdown voltage range of 14.3–15.8 V at 1 mA test current and maximum reverse leakage of 1.0 μA at 12.8 V standoff. Its low-inductance SMB package enables fast response to ESD and surge events.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –65 °C to +150 °C junction temperature. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
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 - Ensures reliable avalanche conduction onset within tight tolerance |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - Limits protected circuit voltage during 600 W surge |
| PPPM | 600 W - Sustains high-energy transients common in automotive load-dump and ISO 7637-2 pulses |
| IFSM | 100 A - Withstands 10 ms half-sine surge without degradation (unidirectional only) |
| TJ max | +150 °C - Enables use in under-hood automotive environments with high ambient thermal stress |
| Package | SMB (DO-214AA) - Standardized surface-mount footprint with 0.220" × 0.205" pad layout for manufacturability |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by a band on the body; terminals are anode and cathode with no internal connection between them.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when VLINE exceeds VBR |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
| Halogen-free & RoHS-compliant | Meets environmental compliance for global automotive and industrial supply chains (HM3 suffix) |
| 600 W peak pulse power | Handles ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a/b (load dump) without failure |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard reflow profiles up to 260 °C peak |
Applications
| Automotive Power Distribution Module | Industrial Motor Drive Control Board |
|---|---|
Use Scenario: Protects 12 V power rail feeding microcontroller and CAN transceiver in junction box modules exposed to alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient spikes above 15 V to <21.2 V, preserving logic-level integrity. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces during ISO 16750-2 load dump tests. | Use Scenario: Shields gate driver inputs and feedback sensing lines from flyback voltage generated by IGBT switching in HVAC inverter stages. IC Role / Device Role / Timing Role: Fast-response avalanche diode diverts inductive kickback energy away from precision op-amps and ADC references. Use Value: Maintains signal fidelity in current-sense amplifiers by limiting voltage excursion to ≤21.2 V during 10/1000 μs surges. |
| Automotive Occupant Detection System | Telecom Base Station Sensor Interface |
Use Scenario: Safeguards capacitive seat occupancy sensor analog front-end from ESD events during vehicle assembly and service. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) unidirectional TVS prevents DC offset drift while suppressing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Ensures long-term calibration stability of pressure-sensitive foam sensors without introducing parasitic loading. | Use Scenario: Clamps lightning-induced surges on RS-485 communication lines connecting remote environmental sensors to central controller. IC Role / Device Role / Timing Role: SMB-packaged TVS provides coordinated protection with upstream GDT and downstream filtering for multi-stage telecom surge immunity. Use Value: Achieves ITU-T K.20/21 compliance for outdoor telecom infrastructure with minimal PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/52 | Same VWM (12.8 V), identical SMB package, but lower PPPM = 400 W and higher VC = 24.4 V at 24.5 A | Not AEC-Q101 qualified; suited for commercial-grade industrial equipment only | Select when cost sensitivity outweighs automotive qualification and higher clamping voltage is acceptable |
| 1.5SMC15A | Same electrical specs (VWM, VBR, VC), but SMC (DO-214AB) package - 2.5 mm wider body and different pad layout | Requires PCB redesign due to larger footprint and thermal pad differences | Choose only if existing design uses SMC and board space allows; not drop-in compatible |
Compared with SMAJ15A-E3/52 and 1.5SMC15A, SM6T15AHM3/I delivers superior automotive qualification, tighter clamping (21.2 V vs. 24.4 V), and halogen-free compliance - critical for OEM-tier BOMs where reliability, regulatory alignment, and thermal margin under sustained surge are prioritized.
Availability
SM6T15AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, occupant detection systems, and telecom sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for SM6T15AHM3/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, automotive-qualified components.
The SM6T Series is designed specifically for robust transient voltage suppression in harsh environments - targeting automotive power electronics, industrial automation, and telecom infrastructure where AEC-Q101 compliance and 600 W surge handling are mandatory.
FAQ
What is the clamping voltage of SM6T15AHM3/I at its rated peak pulse current?
The SM6T15AHM3/I has a maximum clamping voltage (VC) of 21.2 V at 28 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events. The SM6T15AHM3/I maintains this clamping performance across its full operating temperature range.
Is SM6T15AHM3/I qualified for automotive applications?
Yes, SM6T15AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation to meet automotive reliability requirements. The SM6T15AHM3/I is approved for use in engine control modules, body electronics, and ADAS subsystems.
What does the "I" suffix in SM6T15AHM3/I indicate?
The "I" suffix in SM6T15AHM3/I denotes the tape-and-reel packaging option: 3200 units per 13-inch diameter reel (package code "I"). This differs from the "H" suffix (750 units per 7-inch reel). Both share identical electrical and mechanical specifications; the "I" variant supports high-volume SMT assembly lines requiring longer continuous feed lengths.
How does SM6T15AHM3/I differ from bidirectional SM6T15CA variants?
SM6T15AHM3/I is unidirectional with cathode band marking and conducts only in reverse bias, while SM6T15CA is bidirectional with symmetrical breakdown in both directions and no polarity marking. The SM6T15AHM3/I offers lower leakage (<1.0 μA at VWM) and is used where DC bias exists (e.g., power rails), whereas SM6T15CA suits AC-coupled signal lines like data buses.
What is the thermal resistance from junction to ambient for SM6T15AHM3/I?
The typical junction-to-ambient thermal resistance (RθJA) of SM6T15AHM3/I is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard PCB layout per Vishay's recommended pad dimensions and is critical for calculating safe power derating above 25 °C ambient. The SM6T15AHM3/I also exhibits RθJL = 20 °C/W for lead-based thermal paths.
SM6T15AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SM6T15AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15AHM3/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/I reliable?
The price and inventory of SM6T15AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SM6T15AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15AHM3/I?
SM6T15AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15AHM3/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/I?
For technical support, including SM6T15AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15AHM3/I requirements.
6.How does Aetrix verify that SM6T15AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6T15AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SM6T15AHM3/I?
All SM6T15AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15AHM3/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/I part is unused and in its original packaging.
Return procedure for SM6T15AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15AHM3/I Tags
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