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Vishay General Semiconductor - Diodes Division SM6S14ATHE3/I
- Part No.:
- SM6S14ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM6S14ATHE3/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,666
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Product details
Overview
SM6S14ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 5 mA, 23.2 V clamping voltage (VC) at 198 A peak pulse current, and 4600 W peak pulse power (10/1000 μs), operating up to TJ = 175 °C.
For engineers reviewing the SM6S14ATHE3/I datasheet, SM6S14ATHE3/I pinout, SM6S14ATHE3/I application, or SM6S14ATHE3/I equivalent, this device is selected for high-reliability 12 V automotive power rail protection where AEC-Q101 qualification, low leakage (<10 μA at VWM), and DO-218AC package thermal robustness are critical.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability at elevated temperatures. Its unidirectional polarity places the heatsink as the anode terminal, enabling direct thermal coupling to PCB copper for enhanced power dissipation under repetitive surge events.
The device meets ISO 7637-2 load dump requirements and is rated for MSL Level 1 (245 °C reflow peak). Its 0.95 °C/W junction-to-case thermal resistance and 175 °C maximum junction temperature support sustained operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - Maximum continuous reverse operating voltage before significant conduction begins |
| VBR (min/typ/max) | 15.6 / 16.4 / 17.2 V at 5 mA - Confirmed breakdown threshold for reliable clamping onset |
| VC @ IPPM | 23.2 V at 198 A (10/1000 μs) - Clamped voltage limiting downstream IC stress during transients |
| PPPM (10/1000 μs) | 4600 W - Sustains high-energy load dump surges without failure |
| TJ max | +175 °C - Enables placement near heat sources in engine control units and body modules |
| ID @ VWM | <10 μA at 25 °C; <15 μA at 175 °C - Minimizes standby power loss in always-on vehicle networks |
| RθJC | 0.95 °C/W - Allows effective thermal management via heatsink-mounted PCB layout |
Pinout & Package
Package: DO-218AC - Surface-mount, thermally enhanced case with metal heatsink tab (anode) and molded body meeting UL 94 V-0. Dimensions: 16.0 × 9.3 × 3.0 mm (L × W × H); anode lead (Lead 2) serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (cathode) | Transient current sink | Connected to protected line; conducts surge current to ground/anode during overvoltage |
| Lead 2 / metal heatsink (anode) | Thermal & electrical return | Serves as both anode terminal and primary thermal interface to PCB copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JESD22 |
| Junction passivation | Stable VBR drift & low leakage maintained across -55 °C to +175 °C operating range |
| ISO 7637-2 compliance | Withstands standardized 12 V automotive load dump pulses (e.g., 87 V/400 ms) without degradation |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 245 °C peak without moisture-induced damage |
| Low forward voltage drop | VF ≤ 1.9 V at 100 A (8.3 ms half-sine) - Reduces conduction losses during bidirectional surge events |
Applications
| Engine Control Unit (ECU) Power Protection | Body Control Module (BCM) Input Protection |
|---|---|
Use Scenario: Protects 12 V supply input of microcontroller-based ECUs against alternator load dump transients during battery disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and LDO input, conducting only during positive overvoltage events. Use Value: Limits transient voltage to 23.2 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V regulators and MCUs. | Use Scenario: Shields BCM LIN bus power inputs and sensor supply rails from switching noise and relay-induced spikes in door module circuits. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V auxiliary rail, activated only above 14 V to avoid interference with normal operation. Use Value: Maintains <10 μA leakage at 14 V, ensuring minimal impact on low-power sleep-mode current budgets. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Safeguards image sensor and SerDes power supplies in rear-view and surround-view cameras exposed to harsh vehicle electrical environments. IC Role / Device Role / Timing Role: Fast-response TVS on 12 V camera module input, clamping within nanoseconds to preserve signal integrity. Use Value: 4600 W peak power rating absorbs multiple ISO 7637-2 Pulse 5a events without parameter shift or wear-out. | Use Scenario: Protects H-bridge gate drivers and current sense amplifiers in EPS motor control units from inductive kickback during PWM commutation. IC Role / Device Role / Timing Role: High-surge-capability TVS mounted directly at motor driver power input, thermally coupled to heatsink plane. Use Value: 0.95 °C/W RθJC enables stable clamping performance even during repeated 100 A surge events at elevated ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6S14AHM3 | Same VWM/VBR/VC specs; HM3 suffix indicates halogen-free, matte tin-plated leads per JESD201 Class 2 whisker test | No functional difference; intended for new designs replacing HE3-suffix legacy parts | Select SM6S14AHM3 for new automotive designs requiring halogen-free compliance and updated material categorization |
| SMAJ14A | Lower PPPM (400 W vs. 4600 W); DO-214AC package; 1.05 °C/W RθJC; same VWM/VBR range | Not suitable for load dump; limited to ESD and lower-energy transients in non-automotive applications | Choose SMAJ14A only for cost-sensitive consumer or industrial applications with sub-500 W surge requirements |
Compared with SM6S14ATHE3/I, SM6S14AHM3 offers identical electrical performance with updated environmental compliance, while SMAJ14A provides basic clamping at one-tenth the surge capacity-making it unsuitable for automotive load dump but viable for board-level ESD protection.
Availability
SM6S14ATHE3/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera systems, and electric power steering electronics requiring stable component supply and long-term lifecycle support.
Supply support for SM6S14ATHE3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The SM6SxxAT family is engineered specifically for high-energy automotive transient suppression, targeting load dump protection in 12 V systems where AEC-Q101 qualification, 175 °C operation, and DO-218AC thermal performance are mandatory.
FAQ
What is the maximum clamping voltage of the SM6S14ATHE3/I during a 10/1000 μs surge event?
The SM6S14ATHE3/I has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 198 A under the 10/1000 μs waveform. This value is measured at TC = 25 °C and ensures downstream circuitry remains within safe operating limits during standardized load dump transients. The SM6S14ATHE3/I maintains consistent clamping performance across its full temperature range due to its passivated junction design.
Is the SM6S14ATHE3/I suitable for new automotive designs?
No-the SM6S14ATHE3/I is marked "Not For New Designs" in Vishay's official documentation, with SM6S14AHM3 designated as the recommended alternative. While the SM6S14ATHE3/I remains available for legacy program support and repair, new designs should use SM6S14AHM3 to ensure long-term material compliance and manufacturing continuity. The SM6S14ATHE3/I retains full AEC-Q101 qualification and identical electrical specifications.
How is thermal management implemented for the SM6S14ATHE3/I in high-power applications?
The SM6S14ATHE3/I uses its metal heatsink tab (Lead 2/anode) as the primary thermal path, achieving a typical junction-to-case thermal resistance (RθJC) of 0.95 °C/W. Effective thermal management requires mounting the device directly onto a large copper pour or external heatsink using solder fillet coverage ≥80% on the tab area. The DO-218AC package allows conduction cooling without airflow dependency, critical for under-hood automotive placement.
Does the SM6S14ATHE3/I meet ISO 7637-2 requirements for automotive load dump?
Yes-the SM6S14ATHE3/I is explicitly validated to meet ISO 7637-2 surge test requirements, particularly Pulse 5a (load dump), as confirmed in Vishay's application notes and datasheet curves (Fig. 2). Its 4600 W peak pulse power rating and 175 °C junction capability enable reliable suppression of 87 V/400 ms transients common in 12 V vehicle systems. Performance is verified across temperature and lifetime stress conditions.
What is the polarity configuration and terminal identification for the SM6S14ATHE3/I?
SM6S14ATHE3/I is unidirectional, with polarity defined as follows: Lead 1 is the cathode (transient current sink), and Lead 2 (metal heatsink tab) is the anode (thermal and electrical return). The heatsink must be connected to the system ground or low-impedance return path. Polarity is physically marked by a band adjacent to Lead 1 on the DO-218AC package body, consistent with industry-standard TVS diode marking conventions.
SM6S14ATHE3/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):
- 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
SM6S14ATHE3/I FAQ
1.How can I place an order for SM6S14ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S14ATHE3/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 SM6S14ATHE3/I reliable?
The price and inventory of SM6S14ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S14ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM6S14ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S14ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S14ATHE3/I?
SM6S14ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S14ATHE3/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 SM6S14ATHE3/I?
For technical support, including SM6S14ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S14ATHE3/I requirements.
6.How does Aetrix verify that SM6S14ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM6S14ATHE3/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 SM6S14ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM6S14ATHE3/I?
All SM6S14ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6S14ATHE3/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 SM6S14ATHE3/I part is unused and in its original packaging.
Return procedure for SM6S14ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S14ATHE3/I Tags
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