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Vishay General Semiconductor - Diodes Division SM5S10ATHE3/I
- Part No.:
- SM5S10ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S10ATHE3/I.pdf
- Description:
- TVS DIODE 10VWM 17VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,456
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Product details
Overview
SM5S10ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 5 mA, 3600 W peak pulse power (10/1000 μs), 175 °C maximum junction temperature, and DO-218AC package with heatsink-anode polarity.
For engineers reviewing the SM5S10ATHE3/I datasheet, SM5S10ATHE3/I pinout, SM5S10ATHE3/I application, or SM5S10ATHE3/I equivalent, this device serves as a high-reliability, AEC-Q101-qualified TVS for 12 V automotive power rail surge suppression under ISO7637-2 conditions - especially where thermal stability up to 175 °C and low leakage (<15 μA at VWM) are critical.
Technical Context
The SM5S10ATHE3/I employs passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress. Its unidirectional configuration places the metal heatsink as the anode terminal, enabling direct thermal coupling to PCB copper while maintaining low forward voltage drop (≤2.0 V at 100 A).
It delivers 3600 W peak pulse power with 10/1000 μs waveform and sustains 2800 W with 10/10 000 μs waveform - validated per ISO7637-2 load dump test profiles. Thermal resistance from junction to case is 1.0 °C/W, supporting high-power derating up to 175 °C junction temperature without performance degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC blocking threshold in 12 V automotive systems. |
| VBR (min/typ/max) | 11.1 / 11.7 / 12.3 V at 5 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM for robust transient response. |
| PPPM (10/1000 μs) | 3600 W - Sustains high-energy load dump surges without failure; enables single-device protection for alternator transients. |
| VC @ IPPM | 17.0 V - Clamping voltage at rated peak current; limits downstream IC stress to safe levels during surge events. |
| TJ max. | 175 °C - Enables operation in under-hood environments without derating; qualified per AEC-Q101 for automotive use. |
| RθJC | 1.0 °C/W - Low thermal resistance allows efficient heat transfer to heatsink or PCB copper, critical for sustained power dissipation. |
| ID @ VWM | ≤15 μA at 25 °C - Ultra-low leakage preserves battery life in always-on vehicle modules. |
Pinout & Package
Package: DO-218AC - Surface-mount molded case with integral metal heatsink; RoHS-compliant, MSL Level 1, JESD201 Class 2 whisker-tested; anode connected to heatsink for direct thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Standard cathode connection; reverse-biased during normal operation; carries surge current into device during clamping. |
| Lead 2 / Metal Heatsink | Anode | Electrically and thermally active anode terminal; must be connected to system ground or low-impedance return path for optimal clamping and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR over lifetime and temperature; eliminates parameter drift under high-temp cycling (−55 °C to +175 °C). |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive under-hood applications including engine control units, body controllers, and ADAS power supplies. |
| Meets ISO7637-2 surge specification | Complies with Pulse 5a/b load dump waveforms - no external circuitry required for basic 12 V system compliance. |
| Low forward voltage drop (≤2.0 V @ 100 A) | Minimizes conduction loss during high-current surge events, reducing self-heating and improving reliability. |
| DO-218AC mechanical robustness | UL 94 V-0 molding compound and 245 °C lead-free reflow compatibility ensure manufacturability in high-volume automotive SMT lines. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Line Protection |
|---|---|
Use Scenario: Protects ECU 12 V input against alternator load dump transients during battery disconnect or regulator failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse surge energy to ≤17.0 V, preventing damage to downstream DC/DC converters and microcontrollers. Use Value: Eliminates need for series fusing or additional RC snubbing; supports full ISO7637-2 Pulse 5 compliance with single-device solution. |
Use Scenario: Shields BCM power rail from inductive switching spikes generated by door lock actuators, window motors, and lighting relays. IC Role / Device Role / Timing Role: Fast-response transient suppressor with <1 ns response time limits voltage overshoot during 50–100 A inductive turn-off events. Use Value: Maintains system uptime by preventing latch-up or reset of LIN/CAN interface ICs during repeated relay switching cycles. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Supply | Infotainment Head Unit Power Rail Protection |
Use Scenario: Secures 12 V input to ADAS camera module exposed to harsh under-hood thermal and electrical environments. IC Role / Device Role / Timing Role: High-temperature-stable TVS maintains clamping performance at TJ = 175 °C, ensuring protection during extended engine runtime. Use Value: Avoids thermal runaway risk common in polymer-based TVS devices; enables compact placement near camera power entry point. |
Use Scenario: Guards infotainment head unit power input against jump-start surges and cold-crank recovery transients. IC Role / Device Role / Timing Role: 3600 W peak power rating absorbs multiple sequential surges without degradation, supporting long product lifecycle. Use Value: Reduces field failure rate due to power rail overstress; qualifies for OEM 15-year vehicle service life requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S10AHM3 | Same electrical specs and DO-218AC package; HM3 suffix indicates halogen-free, matte tin-plated leads with enhanced whisker resistance (JESD201 Class 2). | No functional difference in surge protection; preferred for new designs requiring halogen-free compliance or stricter whisker mitigation. | Select SM5S10AHM3 for new automotive designs; SM5S10ATHE3/I remains valid for legacy production and AEC-Q101-compliant builds. |
| SMAJ10A | Lower PPPM (400 W), SMA package (DO-214AC), 1.5x higher RθJA, not AEC-Q101 qualified. | Limited to non-automotive or low-surge industrial applications; unsuitable for ISO7637-2 load dump or under-hood deployment. | Use SMAJ10A only in cost-sensitive, low-power consumer applications where 175 °C operation and automotive qualification are unnecessary. |
Compared with SM5S10AHM3, the SM5S10ATHE3/I offers identical surge performance but differs in material compliance and whisker testing class; versus SMAJ10A, it provides 9× higher peak power, automotive qualification, and superior thermal management - making it irreplaceable for demanding automotive power rail protection.
Availability
SM5S10ATHE3/I is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and body control modules requiring stable component supply across extended production lifecycles and high-temperature operating environments.
Supply support for SM5S10ATHE3/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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM5SxxAT family was engineered specifically for automotive load dump protection, combining high-temperature junction capability, ISO7637-2 compliance, and AEC-Q101 qualification in a thermally optimized DO-218AC package.
FAQ
Is SM5S10ATHE3/I AEC-Q101 qualified?
Yes, the SM5S10ATHE3/I is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3", which denotes RoHS-compliant, AEC-Q101-qualified production. This qualification covers temperature cycling, humidity testing, and surge endurance - validating its suitability for automotive under-hood applications. The SM5S10ATHE3/I meets all stress test requirements defined in AEC-Q101 Rev D for transient voltage suppressors.
What is the thermal resistance of SM5S10ATHE3/I and how does it affect layout?
The SM5S10ATHE3/I has a typical junction-to-case thermal resistance (RθJC) of 1.0 °C/W. Because the metal heatsink is the anode terminal, PCB layout must provide a low-thermal-resistance copper pour directly connected to that terminal - ideally ≥250 mm² of 2 oz copper with multiple thermal vias to inner ground planes. This ensures sustained 5 W power dissipation without exceeding 175 °C junction temperature. The SM5S10ATHE3/I cannot achieve rated performance without proper heatsinking.
Does SM5S10ATHE3/I meet ISO7637-2 Pulse 5 requirements?
Yes, the SM5S10ATHE3/I meets ISO7637-2 Pulse 5a and 5b load dump specifications when used with appropriate board-level layout - including short, low-inductance connections to battery and ground. Its 3600 W peak pulse power (10/1000 μs) and 2800 W (10/10 000 μs) ratings exceed the energy thresholds defined in the standard for 12 V systems. The SM5S10ATHE3/I is explicitly cited in Vishay's application notes for ISO7637-2 compliance without auxiliary components.
What is the polarity configuration of SM5S10ATHE3/I and why does it matter?
The SM5S10ATHE3/I is unidirectional with the metal heatsink serving as the anode terminal and Lead 1 as the cathode. This configuration requires the heatsink/anode to be connected to system ground or the low-side return path - not the positive rail - to enable proper clamping during reverse-polarity transients. Incorrect polarity connection renders the SM5S10ATHE3/I ineffective and may cause catastrophic failure. The SM5S10ATHE3/I datasheet clearly identifies heatsink-as-anode in the mechanical drawings and polarity note.
How does SM5S10ATHE3/I compare to older SMAJ-series TVS diodes in automotive use?
The SM5S10ATHE3/I delivers 9× higher peak pulse power (3600 W vs. 400 W for SMAJ10A), operates reliably up to 175 °C (vs. 150 °C), and is AEC-Q101 qualified - unlike SMAJ10A. Its DO-218AC package provides lower thermal resistance (1.0 °C/W vs. ~30 °C/W for SMA), enabling direct PCB heatsinking. These differences make the SM5S10ATHE3/I suitable for modern automotive load dump protection where SMAJ10A would fail thermally or electrically. The SM5S10ATHE3/I is not a drop-in replacement due to different package and thermal mounting requirements.
SM5S10ATHE3/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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 212A
- 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
SM5S10ATHE3/I FAQ
1.How can I place an order for SM5S10ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S10ATHE3/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 SM5S10ATHE3/I reliable?
The price and inventory of SM5S10ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S10ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S10ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S10ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S10ATHE3/I?
SM5S10ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S10ATHE3/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 SM5S10ATHE3/I?
For technical support, including SM5S10ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S10ATHE3/I requirements.
6.How does Aetrix verify that SM5S10ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S10ATHE3/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 SM5S10ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S10ATHE3/I?
All SM5S10ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S10ATHE3/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 SM5S10ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S10ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S10ATHE3/I Tags
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