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Vishay General Semiconductor - Diodes Division SM5S14ATHE3/I
- Part No.:
- SM5S14ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S14ATHE3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,890
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Product details
Overview
SM5S14ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AC package, rated for 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown (VBR), 155 V clamping at 150 A IPPM, 3600 W peak pulse power (10/1000 μs), and 175 °C junction operation - designed for automotive load dump protection in engine control units and body electronics.
For engineers reviewing the SM5S14ATHE3/I datasheet, SM5S14ATHE3/I pinout, SM5S14ATHE3/I application, or SM5S14ATHE3/I equivalent, key selection criteria include unidirectional polarity, heatsink-as-anode configuration, AEC-Q101 qualification, ISO7637-2 compliance, and MSL Level 1 reflow capability up to 245 °C.
Technical Context
This device uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature transients, with thermal resistance RθJC = 1.0 °C/W enabling efficient heat transfer to the metal heatsink terminal. Its 175 °C maximum junction temperature supports under-hood automotive environments without derating below 125 °C ambient.
The SM5S14ATHE3/I operates exclusively in unidirectional mode, where the metal heatsink serves as the anode and the molded lead as cathode; it exhibits low leakage (≤10 μA at VWM = 14 V, TA = 25 °C) and low forward voltage (≤2.0 V at 100 A surge), critical for minimizing conduction loss during load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - maximum continuous reverse operating voltage before significant leakage begins |
| VBR (min/typ/max) | 15.6 / 16.4 / 17.2 V - verified breakdown range at 5 mA test current, defining turn-on threshold |
| VC @ IPPM | 155 V - clamping voltage at 150 A peak pulse current (10/1000 μs), limiting downstream voltage stress |
| PPPM (10/1000 μs) | 3600 W - peak transient energy absorption capacity without failure |
| TJ max. | +175 °C - enables operation in high-temperature automotive zones without thermal shutdown |
| Polarity | Unidirectional - anode connected to heatsink, cathode to signal line; blocks reverse surge only |
| MSL Level | Level 1 per J-STD-020 - supports standard SMT reflow up to 245 °C peak without moisture-induced damage |
Pinout & Package
Package: DO-218AC - surface-mount, single-ended metal heatsink package with matte tin-plated leads; heatsink forms the anode terminal, molded lead is cathode; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Heatsink | Anode | Primary current path for surge conduction; must be thermally and electrically connected to PCB ground plane or chassis |
| Molded Lead | Cathode | Signal-side connection point; clamps voltage between this node and heatsink/anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±0.078 %/°C and low leakage (<10 μA at 14 V, 25 °C) across temperature |
| TJ = 175 °C capability | Supports direct placement near high-power ECUs without external thermal management or derating |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including HTOL, TC, HAST, and mechanical shock per AEC standard |
| Meets ISO7637-2 surge specification | Withstands 12 V system load dump pulses (up to 40 V, 400 ms) per automotive OEM requirements |
| Low forward voltage drop | ≤2.0 V at 100 A ensures minimal conduction loss during sustained surge events |
Applications
| Engine Control Unit (ECU) Protection | Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protects microcontroller power inputs against 12 V battery load dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECU input filter capacitor, clamping surges within 155 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V regulators and MCU I/O by limiting transient voltage to safe margin below absolute maximum ratings. | Use Scenario: Shields BCM power distribution network from switching noise and relay coil flyback in door module circuits. IC Role / Device Role / Timing Role: Mounted directly on 12 V input trace with heatsink tied to chassis ground, absorbing repetitive 100 A/10 ms pulses. Use Value: Maintains functional safety integrity by suppressing >90 % of induced voltage spikes before they reach CAN transceivers and LIN drivers. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and ISP power supply in rear-view cameras exposed to vehicle battery fluctuations. IC Role / Device Role / Timing Role: Unidirectional clamping device on 12 V camera input, leveraging DO-218AC thermal mass to sustain repeated 3600 W pulses. Use Value: Ensures uninterrupted video stream during cold-cranking and jump-start events by holding output voltage within 155 V clamping limit. | Use Scenario: Protects gate drivers and current sense amplifiers in EPS motor control boards from inductive kickback during PWM commutation. IC Role / Device Role / Timing Role: Anode-to-chassis TVS shunting surge energy away from sensitive analog and logic circuitry during MOSFET turn-off. Use Value: Eliminates need for additional RC snubbers by handling 500 A IFSM single-pulse surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S14AHM3 | Same electrical specs; HM3 suffix indicates halogen-free, RoHS-compliant molding compound and enhanced whisker resistance (JESD 201 Class 2) | Identical load dump protection function; preferred for new designs requiring updated environmental compliance | Select HM3 for new automotive programs; HE3 remains valid for legacy production with existing qualification. |
| SMAJ14A | Lower PPPM (400 W vs. 3600 W), DO-214AC package, RθJC ≈ 50 °C/W - less effective thermal dissipation | Suitable for low-energy surges only; not compliant with ISO7637-2 load dump testing | Use SMAJ14A only in non-automotive, low-risk 12 V systems where peak surge energy < 100 mJ. |
Compared with SM5S14AHM3, the SM5S14ATHE3/I offers identical clamping and thermal performance but lacks halogen-free certification; versus SMAJ14A, it delivers 9× higher surge power handling and automotive-grade thermal robustness essential for under-hood deployment.
Availability
SM5S14ATHE3/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across extended temperature and high-reliability conditions.
Supply support for SM5S14ATHE3/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 high-reliability and automotive-grade solutions.
The SM5S series is engineered specifically for automotive load dump protection, combining high-temperature stability, AEC-Q101 qualification, and industry-leading 3600 W surge capability in the DO-218AC package.
FAQ
What is the clamping voltage of SM5S14ATHE3/I at its rated peak pulse current?
The SM5S14ATHE3/I has a maximum clamping voltage (VC) of 155 V when subjected to its rated peak pulse current (IPPM) of 150 A using the 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events. The SM5S14ATHE3/I maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient of 0.078 %/°C.
Is SM5S14ATHE3/I qualified for automotive applications?
Yes, the SM5S14ATHE3/I is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS compliance and JESD 201 Class 2 whisker resistance. It meets ISO7637-2 surge requirements for 12 V automotive systems and is rated for continuous operation from –55 °C to +175 °C junction temperature - making it suitable for engine bay and transmission control unit deployments. The SM5S14ATHE3/I is explicitly listed in Vishay's automotive-grade product portfolio.
What does the "HE3" suffix mean in SM5S14ATHE3/I?
The "HE3" suffix in SM5S14ATHE3/I denotes a RoHS-compliant, AEC-Q101-qualified version with matte tin-plated leads that meet J-STD-002 and JESD 22-B102 solderability standards, and passes JESD 201 Class 2 whisker testing. It also indicates packaging in 13-inch plastic tape and reel with anode oriented toward sprocket holes. The HE3 variant is designated for automotive use, distinguishing it from non-qualified variants.
Can SM5S14ATHE3/I replace SM5S14AHM3 in existing designs?
The SM5S14ATHE3/I and SM5S14AHM3 share identical electrical specifications, thermal performance, and mechanical dimensions, but differ in material composition: HM3 uses halogen-free molding compound while HE3 does not. No PCB or layout changes are required for substitution; however, HM3 is recommended for new designs targeting updated environmental compliance. The SM5S14ATHE3/I remains fully functional in legacy automotive programs qualified with HE3.
What is the thermal resistance from junction to case for SM5S14ATHE3/I?
The SM5S14ATHE3/I has a typical thermal resistance from junction to case (RθJC) of 1.0 °C/W, measured under standard mounting conditions with the metal heatsink soldered to a large copper area. This low value enables efficient heat extraction during repetitive surge events and supports sustained power dissipation up to 5 W on an infinite heatsink at TC = 25 °C. Proper PCB copper pour design is essential to realize this thermal performance in actual SM5S14ATHE3/I implementations.
SM5S14ATHE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-218AC
SM5S14ATHE3/I FAQ
1.How can I place an order for SM5S14ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S14ATHE3/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 SM5S14ATHE3/I reliable?
The price and inventory of SM5S14ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S14ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S14ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S14ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S14ATHE3/I?
SM5S14ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S14ATHE3/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 SM5S14ATHE3/I?
For technical support, including SM5S14ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S14ATHE3/I requirements.
6.How does Aetrix verify that SM5S14ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S14ATHE3/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 SM5S14ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S14ATHE3/I?
All SM5S14ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S14ATHE3/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 SM5S14ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S14ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S14ATHE3/I Tags
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