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Vishay General Semiconductor - Diodes Division SM15T15AHM3_A/I
- Part No.:
- SM15T15AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15AHM3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,180
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Product details
Overview
SM15T15AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM = 12.8 V), 21.2 V clamping voltage at 71 A IPPM, and AEC-Q101 qualified for automotive applications such as engine control unit I/O protection.
For engineers reviewing the SM15T15AHM3_A/I datasheet, SM15T15AHM3_A/I pinout, SM15T15AHM3_A/I application, or SM15T15AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs transients, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and suitability for high-reliability automotive electronics requiring MSL Level 1 and 150 °C junction temperature operation.
Technical Context
The SM15T15AHM3_A/I employs a glass-passivated silicon junction to achieve low clamping ratio (VC/VBR ≈ 1.34) and low dynamic impedance, enabling fast response to ESD and lightning-induced surges. Its 15 Ω typical junction-to-lead thermal resistance supports sustained power dissipation up to 6.5 W on infinite heatsink at 50 °C.
Designed for unidirectional transient suppression, it features a defined cathode terminal, operates over -65 °C to +150 °C junction temperature range, and meets JESD201 Class 2 whisker resistance with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR min/max | 14.3 V / 15.8 V at 1.0 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 21.2 V at 71 A (10/1000 μs) - Clamping voltage limits downstream IC stress during 1500 W surge conditions. |
| PPPM | 1500 W - Peak pulse power rating validates robustness against lightning-induced and inductive switching transients. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments without derating penalties. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 0.305" × 0.320" footprint and 0.079" height for automated assembly. |
| AEC-Q101 | Qualified - Confirms reliability for automotive-grade applications including powertrain and body electronics. |
Pinout & Package
SM15T15AHM3_A/I uses the SMC (DO-214AB) package with two terminals: anode and cathode. The cathode is marked by a visible band on the device body. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction mode | Connected to protected circuit ground or low-side reference; enables unidirectional clamping to ground. |
| Cathode | Current exit point in forward conduction mode; marked with band | Connected to protected line (e.g., CAN_H, LIN, sensor supply); defines clamping direction and polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates immunity to IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted. |
| Low clamping voltage (21.2 V @ 71 A) | Keeps protected MOSFET gate-source voltage below absolute maximum ratings during load dump events. |
| Halogen-free, RoHS-compliant construction | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1). |
| MSL Level 1, peak reflow 260 °C | Supports single-pass lead-free reflow without moisture-related popcorning or delamination. |
| AEC-Q101 qualification (HM3 suffix) | Confirms qualification for automotive applications including engine control, ADAS sensors, and infotainment I/O. |
Applications
| Automotive Powertrain Sensors | Industrial PLC Digital Inputs |
|---|---|
Use Scenario: Protecting crankshaft position sensor signal lines from inductive kickback and battery load dump transients in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy to ground while preserving analog signal integrity. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontroller ADC inputs during 12 V system transients exceeding 100 V. |
Use Scenario: Shielding 24 V DC digital input channels of programmable logic controllers from relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed between input terminal and common rail to limit overvoltage exposure. Use Value: Maintains EN 61000-4-4 (EFT) and EN 61000-4-5 (surge) immunity without adding series impedance or signal delay. |
| Automotive Body Control Modules | Telecom Interface Protection |
Use Scenario: Safeguarding LIN bus transceiver pins against electrostatic discharge and cable coupling transients in door module ECUs. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between LIN data line and chassis ground. Use Value: Ensures >15 kV HBM ESD robustness and <21.2 V clamping during 10/1000 μs surges, preserving LIN physical layer timing margins. |
Use Scenario: Protecting RS-485 transceiver I/O pins in base station remote units exposed to lightning-induced surges on long outdoor cabling. IC Role / Device Role / Timing Role: Primary unidirectional surge suppressor on differential pair lines referenced to local ground plane. Use Value: Limits transient overshoot to ≤21.2 V, preventing transceiver latch-up and maintaining signal eye diagram integrity at 10 Mbps. |
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-E3/57T | Lower PPPM (400 W), same VWM (12.8 V), SMA package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for commercial-grade consumer or industrial PCBs with lower surge threat levels | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary. |
| SMCJ15A-QH | Same PPPM (1500 W), identical VWM/VC specs, but QH suffix denotes AEC-Q101 with different packaging (tape-and-reel code) | Functionally identical performance and qualification; differs only in ordering code and reel configuration | Choose when procurement logistics require Vishay's alternate automotive tape-and-reel format (QH vs HM3). |
Compared with SMAJ15A-E3/57T and SMCJ15A-QH, the SM15T15AHM3_A/I delivers identical automotive-grade clamping performance in a halogen-free, MSL Level 1–qualified SMC package, with differentiated reel delivery (I-code = 13" reel) and traceable sourcing for Tier 1 automotive production programs.
Availability
SM15T15AHM3_A/I is available at Aetrix Electronics and suitable for automotive powertrain systems, industrial PLCs, and telecom infrastructure requiring stable component supply with full AEC-Q101 documentation and halogen-free compliance.
Supply support for SM15T15AHM3_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, and transient protection devices with emphasis on reliability and automotive qualification.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge capability and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the SM15T15AHM3_A/I under a 10/1000 μs surge?
The SM15T15AHM3_A/I has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 71 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and reflects actual device behavior under surge conditions, not theoretical calculation. The SM15T15AHM3_A/I maintains this clamping performance across its specified operating temperature range.
Is the SM15T15AHM3_A/I suitable for automotive applications?
Yes, the SM15T15AHM3_A/I is AEC-Q101 qualified, halogen-free, RoHS-compliant, and rated for operation from -65 °C to +150 °C junction temperature - all requirements for automotive under-hood and body electronics. Its HM3 suffix explicitly denotes AEC-Q101 qualification, and the SM15T15AHM3_A/I is documented for use in engine control units, LIN bus nodes, and BCMs per Vishay's application notes.
What does the "HM3" suffix mean in SM15T15AHM3_A/I?
The "HM3" suffix in SM15T15AHM3_A/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive material standards. The "A/I" portion specifies 13-inch tape-and-reel packaging (I-code) and unidirectional polarity (A), making SM15T15AHM3_A/I fully traceable for automotive production lots.
How does the SM15T15AHM3_A/I compare to bidirectional TVS diodes?
The SM15T15AHM3_A/I is unidirectional and must be installed with correct polarity (cathode toward the protected line). Unlike bidirectional variants (e.g., SM15T15CA), it provides no protection during positive-going transients on grounded lines. Its advantage lies in lower leakage and tighter VBR tolerance - critical for low-power sensor interfaces where SM15T15AHM3_A/I's 1.0 μA ID at 12.8 V improves system standby current budgets.
What is the thermal resistance of the SM15T15AHM3_A/I?
The SM15T15AHM3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. These values enable reliable 6.5 W continuous power dissipation at 50 °C ambient and inform heatsinking decisions for high-duty-cycle surge environments. The SM15T15AHM3_A/I's RθJL directly impacts transient thermal response during repetitive surge events.
SM15T15AHM3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T15AHM3_A/I FAQ
1.How can I place an order for SM15T15AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15AHM3_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 SM15T15AHM3_A/I reliable?
The price and inventory of SM15T15AHM3_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 SM15T15AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T15AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15AHM3_A/I?
SM15T15AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15AHM3_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 SM15T15AHM3_A/I?
For technical support, including SM15T15AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15AHM3_A/I requirements.
6.How does Aetrix verify that SM15T15AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T15AHM3_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 SM15T15AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T15AHM3_A/I?
All SM15T15AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15AHM3_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 SM15T15AHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T15AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15AHM3_A/I Tags
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