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Vishay General Semiconductor - Diodes Division SM8S13ATHE3/I
- Part No.:
- SM8S13ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM8S13ATHE3/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,710
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Product details
Overview
SM8S13ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 13.0 V stand-off voltage (VWM), 15.2 V nominal breakdown voltage (VBR), 21.5 V maximum clamping voltage (VC) at 307 A peak pulse current, and 6600 W peak pulse power (10/1000 μs). Its DO-218AC package supports high-reliability operation up to TJ = 175 °C.
For engineers reviewing the SM8S13ATHE3/I datasheet, SM8S13ATHE3/I pinout, SM8S13ATHE3/I application, or SM8S13ATHE3/I equivalent, key selection criteria include its AEC-Q101 qualification, ISO7637-2 compliance for load dump transients, low leakage (<10 μA at VWM), and heatsink-anode polarity in the DO-218AC case.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability at elevated temperatures. Its unidirectional configuration and heatsink-as-anode construction enable efficient thermal dissipation in high-power surge events such as automotive alternator load dump.
The device delivers 6600 W peak pulse power under 10/1000 μs waveform and maintains stable clamping performance across -55 °C to +175 °C operating junction temperature range. Its 0.90 °C/W junction-to-case thermal resistance supports reliable mounting on metal heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13.0 V - Maximum reverse working voltage before significant conduction begins; defines safe operating margin below breakdown. |
| VBR (nom) | 15.2 V - Voltage at 5 mA test current; establishes precise triggering threshold for transient suppression. |
| VC @ IPPM | 21.5 V - Clamped voltage at 307 A peak pulse current; determines maximum stress imposed on protected circuitry. |
| PPPM (10/1000 μs) | 6600 W - Peak surge power handling capability; enables robust protection against ISO7637-2 load dump pulses. |
| TJ max | +175 °C - Maximum junction temperature rating; supports under-hood automotive deployment without derating. |
| RθJC | 0.90 °C/W - Thermal resistance from junction to case; confirms effective heat transfer to external heatsink. |
| Polarity | Unidirectional, anode = heatsink - Defines terminal assignment for PCB layout and thermal interface design. |
Pinout & Package
Package: DO-218AC - Surface-mount, thermally enhanced case with integral metal heatsink; anode terminal is the metal base (Lead 2), cathode is Lead 1; meets UL 94 V-0, MSL Level 1, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit's positive rail; carries surge current into device during clamping. |
| Lead 2 / Metal Heatsink | Anode | Electrically and thermally connected to system ground/heatsink; serves as primary thermal path and return node. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| Junction passivation optimized | Reduces leakage drift over time and temperature, ensuring stable VWM and VBR performance in harsh environments. |
| ISO7637-2 compliant | Meets automotive electrical disturbance requirements for load dump transients (Pulse 5a), enabling direct integration in 12 V vehicle systems. |
| MSL Level 1 rating | Allows unlimited floor life and reflow soldering at peak 245 °C without moisture-induced damage. |
| Low VF at high IF | ≤1.8 V forward voltage at 100 A (8.3 ms half-sine), minimizing conduction losses during bidirectional surge events. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppresses 12 V system load dump transients (up to 40 V, 100 ms exponential) generated when battery disconnects during alternator operation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and downstream regulator input to clamp overvoltage before it reaches sensitive ICs. Use Value: Limits peak voltage to 21.5 V at 307 A, protecting LDOs and microcontrollers rated for ≤28 V absolute maximum. | Use Scenario: Shields ECU power inputs from coupled transients during ignition switching, fuel pump activation, and relay coil de-energization. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on main 12 V supply line, positioned upstream of input filters and pre-regulators. Use Value: Withstands 700 A non-repetitive forward surge (IFSM), surviving repeated inductive kick events without degradation. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Conditioning |
Use Scenario: Guards BCM power distribution networks against load dump and jump-start surges in modern vehicle architectures. IC Role / Device Role / Timing Role: High-power TVS mounted directly to chassis ground plane via heatsink terminal to minimize inductance in clamping path. Use Value: 6600 W peak power rating ensures single-pulse survivability under worst-case ISO7637-2 Pulse 5a conditions. | Use Scenario: Protects 12 V input of camera modules in driver monitoring and surround-view systems exposed to engine bay EMI. IC Role / Device Role / Timing Role: Final-stage transient guard before DC-DC converter, leveraging low leakage (<10 μA at 13 V) to avoid quiescent current impact. Use Value: Stable 0.076 %/°C VBR temperature coefficient ensures predictable clamping across full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S13AHM3 | Same VWM/VBR/VC specs; HM3 suffix indicates halogen-free, matte tin-plated leads per JESD201 Class 2; identical DO-218AC package. | Designed for new designs where HE3 is marked Not For New Designs; same AEC-Q101 qualification and ISO7637-2 compliance. | Select SM8S13AHM3 for new automotive programs requiring updated material compliance and long-term supply assurance. |
| SMAJ13A | Lower PPPM (400 W vs. 6600 W); SMA package (DO-214AC); VWM = 13 V, VC = 21.5 V, but IPPM = 18.7 A - not suitable for load dump. | Intended for board-level ESD and low-energy transients only; lacks thermal mass and surge capacity for automotive load dump. | Use SMAJ13A only in non-automotive, low-power applications where peak surge energy is <100 mJ. |
Compared with SM8S13AHM3, the SM8S13ATHE3/I offers identical electrical performance but is designated Not For New Designs per Vishay; compared with SMAJ13A, it delivers 16.5× higher surge power and requires DO-218AC mounting for thermal management - critical for sustained load dump immunity.
Availability
SM8S13ATHE3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) input safeguarding, and body control module (BCM) power rail stabilization requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SM8S13ATHE3/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 SM8SxxAT family is engineered specifically for high-energy automotive transient suppression, targeting ISO7637-2 Pulse 5a compliance and under-hood thermal resilience up to 175 °C junction temperature.
FAQ
Is SM8S13ATHE3/I AEC-Q101 qualified?
Yes, SM8S13ATHE3/I is AEC-Q101 qualified per the Vishay datasheet (Document Number: 87734). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and accelerated life testing - confirming suitability for automotive under-hood applications. The HE3 suffix denotes RoHS-compliant, AEC-Q101 qualified construction with JESD201 Class 2 whisker resistance.
What does the "HE3" suffix mean in SM8S13ATHE3/I?
The "HE3" suffix in SM8S13ATHE3/I indicates RoHS-compliant packaging with matte tin-plated leads that meet J-STD-002 and JESD22-B102 solderability standards, plus JESD201 Class 2 whisker resistance. It also signifies AEC-Q101 qualification and compliance with Vishay's material categorization per doc?99912. The "I" denotes 13" tape-and-reel packaging with anode orientation toward sprocket holes.
Can SM8S13ATHE3/I be used for bidirectional transient suppression?
No, SM8S13ATHE3/I is unidirectional only, with polarity defined as anode = metal heatsink (Lead 2) and cathode = Lead 1. It conducts and clamps only for positive transients on the cathode relative to anode. For bidirectional protection, a separate TVS or a dedicated bidirectional device like SMBJ13CA would be required - SM8S13ATHE3/I does not provide reverse conduction capability.
What is the maximum clamping voltage of SM8S13ATHE3/I at rated surge current?
The maximum clamping voltage (VC) of SM8S13ATHE3/I is 21.5 V when subjected to its rated peak pulse current (IPPM) of 307 A under the 10/1000 μs waveform. This value is measured at TC = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Why is SM8S13ATHE3/I marked "Not For New Designs"?
Vishay designates SM8S13ATHE3/I as "Not For New Designs" because the newer SM8S13AHM3 variant offers identical electrical and thermal performance with updated material compliance (halogen-free) and long-term supply assurance. While SM8S13ATHE3/I remains fully functional and supported for existing designs, new automotive programs should adopt SM8S13AHM3 per Vishay's revision notice dated 21-Mar-2024.
SM8S13ATHE3/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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 307A
- 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-218AC
SM8S13ATHE3/I FAQ
1.How can I place an order for SM8S13ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S13ATHE3/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 SM8S13ATHE3/I reliable?
The price and inventory of SM8S13ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S13ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM8S13ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S13ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S13ATHE3/I?
SM8S13ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S13ATHE3/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 SM8S13ATHE3/I?
For technical support, including SM8S13ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S13ATHE3/I requirements.
6.How does Aetrix verify that SM8S13ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM8S13ATHE3/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 SM8S13ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM8S13ATHE3/I?
All SM8S13ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S13ATHE3/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 SM8S13ATHE3/I part is unused and in its original packaging.
Return procedure for SM8S13ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S13ATHE3/I Tags
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