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Vishay General Semiconductor - Diodes Division SM6T15AHM3_B/I
- Part No.:
- SM6T15AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15AHM3_B/I.pdf
- Description:
- 600W,15V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,443
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Product details
Overview
SM6T15AHM3_B/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 provides robust ESD and surge protection for automotive sensor signal lines and MOSFET gate drivers.
For engineers reviewing the SM6T15AHM3_B/I datasheet, SM6T15AHM3_B/I pinout, SM6T15AHM3_B/I application, or SM6T15AHM3_B/I equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, unidirectional polarity alignment with DC-biased circuits, AEC-Q101 qualification status, and SMB footprint compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 μA leakage at 12.8 V), then rapidly avalanches to limit transient overvoltage to ≤21.2 V during 10/1000 μs surges up to 28 A. Its glass-passivated junction ensures stable breakdown and low inductance for fast response.
Designed for surface-mount use on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, it achieves 100 °C/W junction-to-ambient thermal resistance and supports operation from –65 °C to +150 °C. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before conduction begins; must exceed circuit's normal DC bias. |
| VBR (min/max) | 14.3 V / 15.8 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold consistency. |
| VC @ IPPM | 21.2 V at 28 A - Clamped voltage during 10/1000 μs surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; validates protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 0.220" body length; compatible with IPC-7351B footprint. |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by band marking; terminals are anode and cathode, with polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground when voltage exceeds VBR. |
| Anode | Reference/return path | Typically tied to system ground or lowest potential rail; completes shunt path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics. |
| AEC-Q101 qualified | Confirms reliability for automotive applications including engine control units, ADAS sensors, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage overshoot during transients, improving margin for 16 V-rated logic interfaces. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM material restrictions and environmental compliance mandates for global vehicle production. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, clamping transients within 1 ns. Use Value: Limits voltage to ≤21.2 V during 28 A surges, preserving integrity of 3.3 V/5 V microcontrollers and analog front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 600 W pulses without degradation. Use Value: Maintains <1 μA leakage at 12.8 V, preventing false triggering while surviving >10,000 surge events per MIL-STD-883H Method 3015.8. |
| MOSFET Gate Driver Protection | Consumer Power Adapter ESD Guard |
Use Scenario: Shielding high-side N-channel MOSFET gates from Miller-induced voltage spikes during fast switching in DC-DC converters. IC Role / Device Role / Timing Role: Low-inductance TVS mounted directly at gate-source terminals to clamp dv/dt-induced overshoot. Use Value: 20 °C/W junction-to-lead thermal resistance enables rapid heat dissipation during short-duration gate transients. | Use Scenario: Adding secondary-level ESD immunity to USB-C power delivery lines and AC-DC adapter feedback paths. IC Role / Device Role / Timing Role: Unidirectional clamp on 5–20 V regulated rails, suppressing HBM ±15 kV and IEC 61000-4-2 ±8 kV contact discharges. Use Value: Meets MSL Level 1 moisture sensitivity and 260 °C reflow peak, supporting single-pass lead-free assembly without popcorn failure. |
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 VWM (12.8 V) and VC (21.2 V), but lower PPPM (400 W); SMB package identical. | Not AEC-Q101 qualified; suitable only for commercial-grade non-automotive designs. | Select SMAJ15A only if automotive qualification is unnecessary and surge energy is limited to ≤400 W. |
| SMCJ15A | Higher PPPM (1500 W), same VWM/VC, but larger SMC (DO-214AB) package (0.285" x 0.235"). | Requires PCB layout change; used where higher surge immunity (IEC 61000-4-5 Level 5) is mandated. | Choose SMCJ15A when system-level surge testing requires >600 W headroom and board space allows SMC footprint. |
Compared with SMAJ15A and SMCJ15A, SM6T15AHM3_B/I uniquely delivers AEC-Q101 qualification in the compact SMB outline with full 600 W capability-enabling automotive-grade protection without footprint penalty or derating.
Availability
SM6T15AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SM6T15AHM3_B/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 reliability and automotive-grade qualification.
The SM6T Series is engineered specifically for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SM6T15AHM3_B/I at its rated peak pulse current?
The SM6T15AHM3_B/I has a maximum clamping voltage (VC) of 21.2 V when subjected to its specified peak pulse current (IPPM) of 28 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 88385) and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC below the absolute maximum rating of downstream components is essential for reliable protection.
Is SM6T15AHM3_B/I qualified for automotive applications?
Yes, SM6T15AHM3_B/I is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code and explicitly stated in the Vishay SM6T Series datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-ensuring suitability for under-hood and cabin electronics in passenger vehicles and commercial vehicles.
What does the "HM3" suffix indicate in SM6T15AHM3_B/I?
The "HM3" suffix in SM6T15AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, HM3 distinguishes this variant from commercial-grade M3 (halogen-free, RoHS, non-automotive) and HE3 (RoHS, AEC-Q101, with halogens). The "_B/I" indicates packaging in 13-inch tape-and-reel format with 3200 units per reel.
Can SM6T15AHM3_B/I be used in bidirectional configurations?
No, SM6T15AHM3_B/I is a unidirectional TVS diode, as indicated by the absence of "CA" in its part number. Bidirectional variants in the SM6T family use the CA suffix (e.g., SM6T15CA). Using SM6T15AHM3_B/I in AC-coupled or symmetrical signal lines would result in forward conduction during negative half-cycles, potentially damaging the device or circuit. Always match polarity to application topology.
What is the thermal resistance from junction to ambient for SM6T15AHM3_B/I?
The typical junction-to-ambient thermal resistance (RθJA) for SM6T15AHM3_B/I is 100 °C/W, measured under standard conditions with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking and guides thermal design for sustained power dissipation-especially relevant when evaluating duty cycle limits in repetitive surge scenarios or elevated ambient temperatures.
SM6T15AHM3_B/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:
- 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:
- Telecom
- 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_B/I FAQ
1.How can I place an order for SM6T15AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15AHM3_B/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_B/I reliable?
The price and inventory of SM6T15AHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SM6T15AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15AHM3_B/I?
SM6T15AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15AHM3_B/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_B/I?
For technical support, including SM6T15AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15AHM3_B/I requirements.
6.How does Aetrix verify that SM6T15AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T15AHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SM6T15AHM3_B/I?
All SM6T15AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15AHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SM6T15AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15AHM3_B/I Tags
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