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Vishay General Semiconductor - Diodes Division SM5S14AHE3_A/I
- Part No.:
- SM5S14AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S14AHE3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,553
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Product details
Overview
SM5S14AHE3_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), 3600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection. It operates from −55 °C to +175 °C with low leakage (≤10 μA at VWM) and clamps to ≤23.2 V at 150 A.
For engineers reviewing the SM5S14AHE3_A/I datasheet, SM5S14AHE3_A/I pinout, SM5S14AHE3_A/I application, or SM5S14AHE3_A/I equivalent, key selection criteria include its 175 °C junction rating, ISO7637-2 compliance for automotive transients, DO-218AB thermal performance (RθJM = 0.45 °C/W), unidirectional polarity, and RoHS-compliant matte tin terminations meeting JESD 201 Class 2 whisker test.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and surge robustness. Its junction passivation enables reliable operation up to TJ = 175 °C and supports automotive-grade reliability under repeated load dump stress.
The device features a heatsink-anode configuration in DO-218AB, delivering low forward voltage drop (≤2.0 V at 100 A) and high surge capability (IFSM = 500 A, 8.3 ms half-sine). It meets MSL Level 1 per J-STD-020 with 245 °C reflow peak and UL 94 V-0 molding compound.
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 - Ensures precise clamping onset across temperature and process variation |
| VC @ IPPM | 23.2 V at 150 A (10/1000 μs) - Limits downstream circuit voltage during worst-case surge events |
| PPPM (10/1000 μs) | 3600 W - Sustains high-energy transients typical of 12 V automotive load dump |
| TJ max. | +175 °C - Enables placement near hot engine-control electronics without derating |
| ID @ VWM | ≤10 μA at 25 °C - Minimizes standby power loss in always-on vehicle modules |
| RθJM | 0.45 °C/W - Enables efficient heat transfer to PCB copper pour or external heatsink |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-connected metal heatsink case with UL 94 V-0 molding compound and matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Metal Heatsink) | Current entry point during clamping | Direct thermal path to PCB copper or chassis; must be connected to system ground or low-impedance return |
| Cathode (Lead 1) | Current exit point during clamping | Connected to protected line (e.g., battery rail); defines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR drift <0.078 %/°C and low leakage at 175 °C junction temperature |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, HTRB, and ESD testing |
| ISO7637-2 compliance | Withstands Pulse 5a (load dump) up to 35 V/100 ms on 12 V systems without failure |
| MSL Level 1 rating | Allows single-reflow assembly at 245 °C peak without popcorn or delamination risk |
| Heatsink-anode configuration | Reduces thermal resistance to mount (RθJM = 0.45 °C/W), enabling higher sustained power handling |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Clamping |
|---|---|
Use Scenario: Protects microcontroller and sensor power rails against 12 V battery load dump surges during alternator field decay. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input to clamp transients before regulation. Use Value: Limits clamped voltage to 23.2 V, staying below 28 V absolute maximum ratings of common automotive LDOs and PMICs. | Use Scenario: Shields LIN bus transceivers and door module logic from coupled transients induced by window motor switching. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding multiple low-voltage regulators. Use Value: Withstands 500 A surge current (IFSM) and maintains ≤10 μA leakage to avoid draining sleep-mode current budgets. |
| ADAS Camera Power Supply Protection | Start-Stop System Voltage Supervisor Input Protection |
Use Scenario: Safeguards image sensor and SerDes IC power inputs in front-facing cameras exposed to engine bay thermal and electrical stress. IC Role / Device Role / Timing Role: Fast-response TVS on 5 V or 3.3 V post-regulation rail to suppress secondary coupling from nearby high-dI/dt sources. Use Value: 175 °C TJ rating allows placement adjacent to camera SoC without thermal derating; DO-218AB footprint minimizes board area. | Use Scenario: Guards voltage supervisor IC inputs monitoring battery state during aggressive start-stop cycling with repeated 25 V+ spikes. IC Role / Device Role / Timing Role: Standoff-rated protector (VWM = 14 V) ensuring supervisor remains functional during nominal 12.8 V–14.4 V operation while clamping >17.2 V events. Use Value: Tight VBR tolerance (±5 %) guarantees predictable trip margin above regulated rail, preventing false undervoltage lockout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S14AHM3_A/I | Same VWM/VBR/PPPM specs; HM3 suffix denotes enhanced material category (halogen-free, Pb-free, whisker-tested) and updated qualification per latest AEC-Q101 rev. | Identical automotive use cases; preferred for new designs requiring updated environmental compliance. | Select SM5S14AHM3_A/I for new designs-SM5S14AHE3_A/I is Not For New Designs per Vishay documentation. |
| SMAJ14A | Lower PPPM (400 W), smaller SMA package (RθJA ≈ 60 °C/W), no AEC-Q101 qualification, VBR min 15.6 V same but higher leakage (≤50 μA). | Suitable only for non-automotive industrial or consumer applications with lower surge energy requirements. | Use SMAJ14A only where cost or board space constraints outweigh automotive reliability needs. |
Compared with SM5S14AHE3_A/I, SM5S14AHM3_A/I offers identical electrical performance with improved environmental compliance and lifecycle support, while SMAJ14A provides basic TVS functionality at lower cost and power handling but lacks automotive qualification and thermal robustness.
Availability
SM5S14AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, body control module clamping, and ADAS camera power rail stabilization requiring stable component supply and long-term production continuity.
Supply support for SM5S14AHE3_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, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SM5SxxA family is designed specifically for high-reliability automotive transient suppression, targeting load dump, inductive switching, and lightning-induced surge protection in 12 V and 24 V systems.
FAQ
What is the maximum clamping voltage of SM5S14AHE3_A/I at its rated peak pulse current?
The SM5S14AHE3_A/I has a maximum clamping voltage (VC) of 23.2 V when subjected to its peak pulse current (IPPM) of 150 A under the standard 10/1000 μs waveform. This value is guaranteed across temperature and process variation and ensures protected downstream ICs remain within safe operating voltage limits during automotive load dump events.
Is SM5S14AHE3_A/I qualified for automotive applications?
Yes, SM5S14AHE3_A/I is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It meets ISO7637-2 Pulse 5a load dump requirements, operates up to +175 °C junction temperature, and is manufactured with whisker-tested matte tin terminations compliant with JESD 201 Class 2.
What does the "HE3" suffix mean in SM5S14AHE3_A/I?
The "HE3" suffix in SM5S14AHE3_A/I indicates RoHS-compliant, halogen-free construction with Pb-free matte tin plating, AEC-Q101 qualification ("H"), and compliance with JESD 201 Class 2 whisker resistance. The "E3" portion confirms environmental compliance per Vishay's material categorization standard.
Can SM5S14AHE3_A/I replace SM5S14AHM3_A/I in existing designs?
No-SM5S14AHE3_A/I is designated "Not For New Designs" per Vishay documentation, with SM5S14AHM3_A/I listed as the recommended alternative. While electrically identical, HM3 incorporates updated material specifications and qualification revisions; legacy HE3 units may face obsolescence-driven supply constraints.
What is the thermal resistance from junction to mount for SM5S14AHE3_A/I?
The SM5S14AHE3_A/I has a typical junction-to-mount thermal resistance (RθJM) of 0.45 °C/W, measured using JEDEC®51-14 Transient Dual Interface Method. This low value reflects the DO-218AB package's metal heatsink anode, enabling efficient heat transfer to PCB copper or external thermal planes.
SM5S14AHE3_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):
- 155A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
SM5S14AHE3_A/I FAQ
1.How can I place an order for SM5S14AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S14AHE3_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 SM5S14AHE3_A/I reliable?
The price and inventory of SM5S14AHE3_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 SM5S14AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM5S14AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S14AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S14AHE3_A/I?
SM5S14AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S14AHE3_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 SM5S14AHE3_A/I?
For technical support, including SM5S14AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S14AHE3_A/I requirements.
6.How does Aetrix verify that SM5S14AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM5S14AHE3_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 SM5S14AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM5S14AHE3_A/I?
All SM5S14AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S14AHE3_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 SM5S14AHE3_A/I part is unused and in its original packaging.
Return procedure for SM5S14AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S14AHE3_A/I Tags
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