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Vishay General Semiconductor - Diodes Division SM6S12AHE3/2D
- Part No.:
- SM6S12AHE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S12AHE3/2D.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,760
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Product details
Overview
SM6S12AHE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown (VBR), 4600 W peak pulse power (10/1000 μs), and 175 °C junction temperature-designed for automotive load dump protection in engine control units and body electronics.
For engineers reviewing the SM6S12AHE3/2D datasheet, SM6S12AHE3/2D pinout, SM6S12AHE3/2D application, or SM6S12AHE3/2D equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, ISO7637-2 compliance, low leakage (<10 μA at VWM), and thermal resistance RθJM = 0.45 °C/W for high-reliability under-hood deployment.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress up to 175 °C junction temperature. Its DO-218AB package integrates a metal heatsink as anode terminal, enabling direct PCB thermal coupling and supporting high IFSM (600 A) single-half-sine surge current.
The device operates with fixed unidirectional polarity and exhibits a typical VBR temperature coefficient of +0.074 %/°C. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing-critical for automotive solder reflow and long-term interconnect reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (min/typ/max) | 13.3 / 14.0 / 14.7 V at 5 mA - precise breakdown threshold for predictable clamping onset |
| VC @ IPPM | 19.9 V - clamping voltage during 4600 W surge, limiting downstream IC stress |
| PPPM (10/1000 μs) | 4600 W - peak transient energy handling capacity for load dump transients |
| ID @ VWM | <10 μA at 25 °C - ultra-low leakage preserves battery drain-critical circuits |
| TJ max. | +175 °C - enables placement near high-temperature engine compartments |
| RθJM | 0.45 °C/W - low junction-to-mount thermal resistance supports direct heatsink mounting |
Pinout & Package
Package: DO-218AB - surface-mount, anode-heatsink configuration with matte tin-plated leads, UL 94 V-0 molding compound, and RoHS-compliant (E3) termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Metal Heatsink) | Current entry point during clamping | Direct thermal path to PCB copper; must be connected to large copper pour or heatsink |
| Cathode (Lead 1) | Current exit point during clamping | Standard signal-side connection; routed to protected line (e.g., 12 V rail) |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR over lifetime and temperature |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST stress tests |
| ISO7637-2 compliance | Meets Pulse 5a/b load dump requirements for 12 V systems without external filtering |
| MSL Level 1 rating | Unlimited floor life and compatibility with standard 245 °C peak reflow profiles |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity stress |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Line |
|---|---|
Use Scenario: Protects ECU 12 V supply against alternator load dump surges up to 35 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient energy before it reaches LDOs and microcontrollers. Use Value: Limits input voltage to ≤19.9 V during 4600 W surge, preventing brownout or latch-up in safety-critical MCU domains. | Use Scenario: Shields CAN transceiver power pins from coupled transients induced by nearby solenoid switching. IC Role / Device Role / Timing Role: Fast-response TVS absorbs coupled energy on VCC rail without affecting CAN signal integrity. Use Value: Maintains <10 μA leakage at 12 V, avoiding false wake-up or increased quiescent current in sleep mode. |
| Automotive Lighting Driver Supply | Infotainment Head Unit Power Rail |
Use Scenario: Guards LED driver ICs against inductive kickback from headlamp relay coils. IC Role / Device Role / Timing Role: Standoff-rated TVS blocks normal operation but conducts within nanoseconds during >13.3 V spikes. Use Value: Withstands 600 A IFSM surge, surviving repeated relay coil de-energization events over 15-year vehicle life. | Use Scenario: Stabilizes 5 V/3.3 V DC-DC converter inputs against battery line transients during jump-start conditions. IC Role / Device Role / Timing Role: High-power TVS diverts surge current away from sensitive PMICs and SoCs. Use Value: Delivers 0.45 °C/W RθJM thermal path, enabling direct thermal coupling to ground plane for sustained 6 W dissipation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6S12AHM3 | Same electrical specs; HM3 suffix indicates halogen-free, Pb-free, and AEC-Q101 qualified with enhanced moisture sensitivity level control | Identical automotive use cases; preferred for new designs due to updated material compliance and lifecycle support | Select SM6S12AHM3 for new designs requiring full RoHS 2011/65/EU and REACH SVHC compliance |
| SMAJ12A | Lower PPPM (400 W vs. 4600 W); DO-214AC package; no AEC-Q101 qualification; RθJA = 60 °C/W | Limited to non-automotive, low-energy industrial or consumer applications | Use SMAJ12A only where surge energy is ≤400 W and automotive qualification is not required |
Compared with SM6S12AHE3/2D, SM6S12AHM3 offers identical protection performance with improved environmental compliance and longer product lifecycle visibility, while SMAJ12A provides basic clamping at one-tenth the surge rating and lacks automotive qualification-making it unsuitable for under-hood deployment.
Availability
SM6S12AHE3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, and lighting driver systems requiring stable component supply across extended temperature and high-surge environments.
Supply support for SM6S12AHE3/2D 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 high-reliability diodes, MOSFETs, and TVS devices for automotive, industrial, and computing markets.
The SM6SxxA family was engineered specifically for automotive load dump and ISO7637-2 transient suppression, delivering high-power clamping in thermally optimized DO-218AB packaging with AEC-Q101 validation.
FAQ
What is the clamping voltage of SM6S12AHE3/2D at its rated peak pulse current?
The SM6S12AHE3/2D has a maximum clamping voltage (VC) of 19.9 V when subjected to its peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured at the specified test condition and ensures downstream components see limited overvoltage during surge events. The SM6S12AHE3/2D maintains this clamping performance across its full operating temperature range up to TJ = 175 °C.
Is SM6S12AHE3/2D qualified for automotive applications?
Yes, SM6S12AHE3/2D is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 load dump requirements, operates from –55 °C to +175 °C, and passes JESD201 Class 2 whisker testing and MSL Level 1 reflow standards. The SM6S12AHE3/2D is recommended for under-hood ECUs, BCMs, and lighting systems where reliability under thermal and electrical stress is critical.
What does the "HE3" suffix mean in SM6S12AHE3/2D?
The "HE3" suffix in SM6S12AHE3/2D denotes RoHS-compliant, halogen-free construction with Pb-free matte tin plating and JESD201 Class 2 whisker resistance. The "H" confirms AEC-Q101 qualification, and "E3" specifies environmental compliance per Vishay's material categorization system. The "2D" denotes date code and revision-distinct from electrical or reliability specifications. SM6S12AHE3/2D retains all base electrical parameters defined in the SM6S12A datasheet.
Can SM6S12AHE3/2D replace SM6S12AHM3 in existing designs?
SM6S12AHE3/2D and SM6S12AHM3 share identical electrical characteristics, package (DO-218AB), pinout, and AEC-Q101 qualification. However, HM3 uses an updated halogen-free formulation with tighter moisture sensitivity controls. While functionally interchangeable, SM6S12AHM3 is designated "Not For New Designs" for SM6S12AHE3/2D-so SM6S12AHE3/2D remains valid for legacy production, but SM6S12AHM3 is preferred for new designs.
What is the thermal resistance from junction to mount (RθJM) for SM6S12AHE3/2D?
The SM6S12AHE3/2D has a typical junction-to-mount thermal resistance (RθJM) of 0.45 °C/W, measured per JEDEC 51-14 using the Transient Dual Interface Method. This low value reflects the DO-218AB package's integrated metal heatsink anode, enabling efficient heat transfer to the PCB copper or external heatsink-critical for sustaining 6 W power dissipation in high-ambient automotive environments. The SM6S12AHE3/2D leverages this to maintain safe junction temperatures during repeated surge events.
SM6S12AHE3/2D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 231A
- 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-218AB
SM6S12AHE3/2D FAQ
1.How can I place an order for SM6S12AHE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S12AHE3/2D 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 SM6S12AHE3/2D reliable?
The price and inventory of SM6S12AHE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S12AHE3/2D is usually 5 days.
3.What payment methods are accepted for SM6S12AHE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S12AHE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S12AHE3/2D?
SM6S12AHE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S12AHE3/2D 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 SM6S12AHE3/2D?
For technical support, including SM6S12AHE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S12AHE3/2D requirements.
6.How does Aetrix verify that SM6S12AHE3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S12AHE3/2D 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 SM6S12AHE3/2D meets industry standards.
7.What is the process for return or replacement of SM6S12AHE3/2D?
All SM6S12AHE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S12AHE3/2D, 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 SM6S12AHE3/2D part is unused and in its original packaging.
Return procedure for SM6S12AHE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S12AHE3/2D Tags
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