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Vishay General Semiconductor - Diodes Division SM6S14AHM3/I
- Part No.:
- SM6S14AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM6S14AHM3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,230
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Product details
Overview
SM6S14AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in DO-218AB package, rated for 14 V stand-off voltage (VWM), 16.4 V nominal breakdown (VBR), 4600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection. It operates from −55 °C to +175 °C junction temperature.
For engineers reviewing the SM6S14AHM3/I datasheet, SM6S14AHM3/I pinout, SM6S14AHM3/I application, or SM6S14AHM3/I equivalent, this page delivers verified electrical parameters, thermal performance data, automotive-grade reliability context, and direct alternative part guidance aligned with Vishay's official replacement guidance.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage. Its unidirectional polarity and heatsink-anode configuration support robust clamping during load dump transients up to 10 ms exponential waveform per ISO7637-2.
Designed for automotive electronics, it delivers 198 V maximum clamping voltage at 150 A peak pulse current (10/1000 μs), with 0.078 %/°C temperature coefficient of VBR and 0.45 °C/W junction-to-mount thermal resistance under JEDEC 51-14 TDIM test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - Maximum continuous reverse operating voltage before clamping begins; defines system-level DC bus tolerance margin. |
| VBR (nom) | 16.4 V - Breakdown voltage at 5 mA test current; ensures precise turn-on threshold for transient suppression. |
| VC @ IPPM | 23.2 V - Clamping voltage at 150 A (10/1000 μs); limits downstream IC stress during surge events. |
| PPPM (10/1000 μs) | 4600 W - Peak pulse power handling; supports high-energy automotive load dump waveforms. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood environments without derating. |
| IFSM | 600 A - Non-repetitive forward surge current rating; withstands short-circuit fault currents in power distribution networks. |
| Polarity | Unidirectional - Anode-connected heatsink configuration; requires correct PCB layout orientation for proper circuit protection. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with matte tin-plated leads, UL 94 V-0 flammability rating, MSL Level 1, and AEC-Q101 qualification. Heatsink serves as anode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive clamp reference | Electrically connected to metal heatsink tab; must be routed to system ground or low-impedance return path for effective clamping. |
| Cathode (Lead 1) | Transient current sink | Connected to protected line (e.g., battery rail); carries full surge current during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process reduces leakage to ≤10 μA at VWM and TJ = 175 °C, improving long-term reliability in harsh environments. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock testing per JESD22 standards. |
| ISO7637-2 compliance | Meets load dump surge requirements (Pulse 5a) up to 10 ms exponential waveform, enabling direct integration into 12 V vehicle power systems. |
| Low RθJM | 0.45 °C/W junction-to-mount thermal resistance enables efficient heat transfer to PCB copper pour or external heatsink, sustaining high-power transients. |
| DO-218AB footprint | Standardized IPC 7351-compliant pad layout supports automated assembly and provides superior thermal and mechanical robustness vs. SMA/SMB packages. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Rail |
|---|---|
Use Scenario: Voltage spikes up to 40 V induced by alternator field-circuit disconnection during engine operation. IC Role / Device Role / Timing Role: Primary clamping device on 12 V battery input rail of automotive modules. Use Value: Limits transient voltage to ≤23.2 V at 150 A, protecting downstream PMICs and microcontrollers from overvoltage damage. |
Use Scenario: ECU exposed to repeated load dump events during vehicle start-stop cycles and accessory switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and input filter capacitor. Use Value: Maintains <10 μA leakage at 14 V and 175 °C, preserving low-quiescent-current design integrity over lifetime. |
| Body Control Module (BCM) Input Protection | ADAS Camera Power Supply |
Use Scenario: BCM subjected to inductive kickback from solenoid drivers and relay coils in door lock/window circuits. IC Role / Device Role / Timing Role: Secondary protection stage after fuse and upstream TVS, absorbing residual energy. Use Value: Withstands 600 A single half-sine surge (8.3 ms), ensuring survivability during worst-case fault conditions. |
Use Scenario: Front-facing camera module powered directly from vehicle battery with minimal filtering. IC Role / Device Role / Timing Role: First-line transient suppressor on 12 V input before DC/DC converter. Use Value: 4600 W peak pulse power rating handles combined ISO7637-2 Pulse 1, 2a, 3a/b, and 5a surges 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 |
|---|---|---|---|
| SM6S14AHM3 | No /I suffix - standard tape-and-reel packaging without moisture-sensitive labeling; identical electrical and thermal specs. | Same automotive load dump protection function; differs only in packaging compliance documentation. | Select SM6S14AHM3/I when J-STD-033-compliant moisture sensitivity level (MSL) labeling and traceable reel markings are required for SMT production. |
| SM6S15AHM3/I | Higher VWM (15 V) and VBR (17.6 V nom); 24.4 V clamping voltage at 150 A; same DO-218AB package and AEC-Q101 qualification. | Better suited for systems with higher nominal rail tolerance (e.g., 13.5 V nominal battery); slightly reduced clamping margin. | Choose SM6S15AHM3/I where system VWM margin exceeds 14.5 V and tighter clamping voltage tolerance is not critical. |
Compared with SM6S14AHM3/I, SM6S14AHM3 offers identical protection performance with simplified packaging logistics, while SM6S15AHM3/I trades 1 V higher stand-off for marginally increased clamping voltage-both require no PCB redesign but differ in compliance scope and system voltage alignment.
Availability
SM6S14AHM3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power rail hardening, and body control module (BCM) input protection requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SM6S14AHM3/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, TVS devices, and optoelectronics with emphasis on automotive, industrial, and computing applications.
The SM6SxxA family was engineered specifically for high-energy transient suppression in automotive 12 V systems, targeting ISO7637-2 compliance, AEC-Q101 qualification, and operation up to +175 °C junction temperature.
FAQ
What is the maximum clamping voltage of the SM6S14AHM3/I at its rated peak pulse current?
The SM6S14AHM3/I has a maximum clamping voltage (VC) of 23.2 V at 150 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6S14AHM3/I maintains this clamping performance across its full operating temperature range.
Is the SM6S14AHM3/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the SM6S14AHM3/I is explicitly AEC-Q101 qualified per Vishay's documentation and meets all required stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. Its DO-218AB package, 175 °C junction rating, and ISO7637-2 compliance make the SM6S14AHM3/I appropriate for under-hood and safety-critical automotive subsystems.
What does the "/I" suffix indicate in SM6S14AHM3/I?
The "/I" suffix in SM6S14AHM3/I denotes compliance with J-STD-033 moisture sensitivity level (MSL) labeling requirements and indicates packaging in 13-inch diameter plastic tape-and-reel with anode orientation toward the sprocket hole. It confirms full traceability and handling instructions for moisture-sensitive surface-mount assembly, distinguishing it from the base SM6S14AHM3 variant.
How does the SM6S14AHM3/I compare to older SM6S14A in terms of reliability and packaging?
The SM6S14AHM3/I replaces the legacy SM6S14A with enhanced reliability features: it is AEC-Q101 qualified, RoHS-compliant, halogen-free (E3), and rated for 175 °C operation-whereas SM6S14A lacks formal automotive qualification and higher-temperature validation. The HM3 suffix also indicates improved plating and whisker resistance per JESD201 Class 2.
What thermal performance metrics are specified for the SM6S14AHM3/I?
The SM6S14AHM3/I specifies RθJM = 0.45 °C/W (junction-to-mount) per JEDEC 51-14 TDIM method and RθJA = 55 °C/W (junction-to-ambient) on FR4 PCB with 2 oz. copper. These values enable accurate thermal modeling for heatsink design and power derating-critical for sustained surge duty cycles in automotive applications using the SM6S14AHM3/I.
SM6S14AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 198A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AC
SM6S14AHM3/I FAQ
1.How can I place an order for SM6S14AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S14AHM3/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 SM6S14AHM3/I reliable?
The price and inventory of SM6S14AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S14AHM3/I is usually 5 days.
3.What payment methods are accepted for SM6S14AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S14AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S14AHM3/I?
SM6S14AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S14AHM3/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 SM6S14AHM3/I?
For technical support, including SM6S14AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S14AHM3/I requirements.
6.How does Aetrix verify that SM6S14AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM6S14AHM3/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 SM6S14AHM3/I meets industry standards.
7.What is the process for return or replacement of SM6S14AHM3/I?
All SM6S14AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6S14AHM3/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 SM6S14AHM3/I part is unused and in its original packaging.
Return procedure for SM6S14AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S14AHM3/I Tags
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