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Vishay General Semiconductor - Diodes Division SM8S14AHE3_A/I
- Part No.:
- SM8S14AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S14AHE3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,750
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Product details
Overview
SM8S14AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown (VBR), 6600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection.
For engineers reviewing the SM8S14AHE3_A/I datasheet, SM8S14AHE3_A/I pinout, SM8S14AHE3_A/I application, or SM8S14AHE3_A/I equivalent, key selection criteria include TJ = 175 °C operation, low leakage (≤10 μA at VWM), clamping voltage of 23.2 V at IPPM, and compliance with ISO7637-2 surge testing under defined conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve high reliability and thermal stability up to 175 °C junction temperature. Its unidirectional polarity and heatsink-anode configuration enable robust clamping during positive transients in DC power rails.
The device delivers 284 A peak pulse current (10/1000 μs) with 23.2 V clamping voltage and exhibits a typical VBR temperature coefficient of +0.078 %/°C - enabling predictable voltage shift across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (min/typ/max) | 15.6 / 16.4 / 17.2 V at 5 mA - precise breakdown threshold for reliable turn-on during overvoltage events |
| VC @ IPPM | 23.2 V at 284 A - clamping voltage limiting downstream circuit stress during 6600 W surge |
| PPPM (10/1000 μs) | 6600 W - surge energy handling capability validated per IEC 61000-4-5 and ISO7637-2 test conditions |
| TJ max | 175 °C - enables placement near hot engine control units without derating |
| Leakage @ VWM | ≤10 μA at 25 °C - minimizes standby power loss in always-on automotive modules |
| AEC-Q101 | Qualified - meets stress test requirements for automotive-grade reliability and lifetime validation |
Pinout & Package
Package: DO-218AB - thermally enhanced surface-mount case with metal heatsink acting as anode terminal; meets UL 94 V-0, MSL Level 1, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive surge return path | Large metal tab serves as both electrical anode and primary thermal interface to PCB copper pour or heatsink |
| Cathode (Lead 1) | Transient clamping node | Connected to protected line (e.g., battery rail); conducts during overvoltage to shunt current to anode |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and low leakage over lifetime and temperature |
| High-temperature operation | Rated for continuous operation at TJ = 175 °C - supports placement in under-hood ECUs without thermal derating |
| Automotive qualification | AEC-Q101 qualified and RoHS-compliant with matte tin plating - meets production requirements for Tier 1 suppliers |
| Surge compliance | Validated against ISO7637-2 load dump waveforms - provides design confidence for 12 V automotive systems |
| Low clamping ratio | VC/VBR ≈ 1.41 - tight voltage margin between breakdown and clamping improves system-level protection headroom |
Applications
| Engine Control Unit (ECU) Power Protection | Body Control Module (BCM) Input Protection |
|---|---|
Use Scenario: Protects 12 V supply input of engine control units exposed to alternator load dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive surges on battery rail, diverting >280 A away from downstream DC/DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to MCU power domains while maintaining ≤23.2 V rail clamping during ISO7637-2 Pulse 5a events. | Use Scenario: Shields BCM power inputs from switching noise and relay-induced spikes in door module and lighting circuits. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at board edge to absorb repetitive 100–500 A spikes from inductive loads. Use Value: Enables long-term reliability in 15-year vehicle lifecycles by sustaining ≤10 μA leakage at 14 V and surviving 1000+ surge events at 80 % rated IPPM. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Rail | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Secures 12 V input of ADAS front-facing camera modules mounted near engine bay. IC Role / Device Role / Timing Role: High-reliability TVS with 175 °C rating absorbs thermal-coupled transients during cold cranking and load dump. Use Value: Maintains signal integrity and prevents image dropout by clamping within 1 ns and holding VC ≤23.2 V at full 6600 W surge. | Use Scenario: Guards H-bridge driver IC supply against back-EMF from EPS motor commutation and fault recovery. IC Role / Device Role / Timing Role: Unidirectional suppressor connected between motor driver VDD and chassis ground, leveraging heatsink-anode for low-inductance path. Use Value: Reduces need for oversized bulk capacitance by absorbing 5200 W (10/10,000 μs) surges without degradation over 10,000 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S14AHM3_A/I | Same electrical specs and DO-218AB package; HM3 suffix indicates updated internal construction and tighter process control | Identical use cases; preferred for new designs per Vishay's "Not For New Designs" notice for HE3 series | Select SM8S14AHM3_A/I when qualifying new automotive platforms requiring latest revision and extended lifecycle support |
| SMAJ14A | Lower PPPM (400 W), smaller SMA package, no AEC-Q101 qualification, higher RθJA (95 °C/W) | Limited to non-automotive, lower-energy industrial or consumer applications | Choose SMAJ14A only for cost-sensitive, non-automotive designs where 175 °C operation and ISO7637-2 compliance are not required |
Compared with SM8S14AHE3_A/I, SM8S14AHM3_A/I offers identical protection performance with improved manufacturing consistency and longer availability, while SMAJ14A trades surge capacity, thermal performance, and automotive qualification for footprint and cost reduction - making it unsuitable for under-hood deployment.
Availability
SM8S14AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU power protection, body control module hardening, and ADAS camera rail stabilization requiring stable component supply and traceable sourcing.
Supply support for SM8S14AHE3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM8SxxA family is engineered specifically for automotive load dump and ISO7637-2 transient suppression, emphasizing high-temperature operation, AEC-Q101 qualification, and robust surge handling in DO-218AB packaging.
FAQ
What is the maximum clamping voltage of the SM8S14AHE3_A/I at its rated peak pulse current?
The SM8S14AHE3_A/I has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current of 284 A using the 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 worst-case surge events.
Is the SM8S14AHE3_A/I suitable for new automotive designs?
No - Vishay explicitly marks SM8S14AHE3_A/I as "Not For New Designs", recommending SM8S14AHM3_A/I as the alternative. The HE3 version remains available for legacy production and repair, but new designs should use the HM3 variant for assured long-term supply and updated process qualifications.
What does the "HE3" suffix indicate in SM8S14AHE3_A/I?
The "HE3" suffix in SM8S14AHE3_A/I denotes RoHS-compliant, halogen-free construction with matte tin-plated leads, AEC-Q101 qualification, and compliance with JESD201 Class 2 whisker resistance. The "A/I" further specifies packaging in 13-inch tape-and-reel with anode orientation toward sprocket holes.
How does the DO-218AB package of the SM8S14AHE3_A/I improve thermal performance compared to SMA or SMB?
The DO-218AB package of the SM8S14AHE3_A/I features an integrated metal heatsink acting as the anode terminal, achieving RθJM = 0.35 °C/W - over 3× better than standard SMA packages. This enables direct thermal coupling to PCB copper or external heatsinks, supporting sustained 175 °C operation without derating.
Does the SM8S14AHE3_A/I meet ISO7637-2 compliance out-of-the-box?
The SM8S14AHE3_A/I is specified to meet ISO7637-2 surge requirements under defined test conditions, including Pulse 5a (load dump). However, system-level compliance depends on PCB layout, grounding, and proximity to protected ICs - the device itself provides the necessary clamping performance but requires proper implementation to pass full vehicle-level testing.
SM8S14AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- 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):
- 284A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
SM8S14AHE3_A/I FAQ
1.How can I place an order for SM8S14AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S14AHE3_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 SM8S14AHE3_A/I reliable?
The price and inventory of SM8S14AHE3_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 SM8S14AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM8S14AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S14AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S14AHE3_A/I?
SM8S14AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S14AHE3_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 SM8S14AHE3_A/I?
For technical support, including SM8S14AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S14AHE3_A/I requirements.
6.How does Aetrix verify that SM8S14AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM8S14AHE3_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 SM8S14AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM8S14AHE3_A/I?
All SM8S14AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S14AHE3_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 SM8S14AHE3_A/I part is unused and in its original packaging.
Return procedure for SM8S14AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S14AHE3_A/I Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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