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Vishay General Semiconductor - Diodes Division SM8S10AHM3/I
- Part No.:
- SM8S10AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM8S10AHM3/I.pdf
- Description:
- TVS DIODE 10VWM 17VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,069
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Product details
Overview
SM8S10AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 10 V stand-off voltage (VWM), 11.1–12.3 V breakdown (VBR), 6600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive load dump protection. It operates from −55 °C to +175 °C with low leakage (≤15 μA at VWM) and clamps transients to ≤17.0 V at 388 A.
For engineers reviewing the SM8S10AHM3/I datasheet, SM8S10AHM3/I pinout, SM8S10AHM3/I application, or SM8S10AHM3/I equivalent, this page delivers verified electrical parameters, thermal resistance (RθJM = 0.35 °C/W), ISO7637-2 compliance status, unidirectional polarity confirmation, and AEC-Q101 qualification evidence - all critical for high-reliability automotive power rail protection design.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability at TJ = 175 °C, enabling sustained operation in under-hood automotive environments. Its DO-218AB package features a metal heatsink acting as the anode terminal, delivering low thermal resistance (RθJM = 0.35 °C/W) and supporting high surge current handling (IFSM = 700 A).
The device meets MSL Level 1 per J-STD-020 (peak reflow = 245 °C), has matte tin-plated leads solderable per J-STD-002/JESD22-B102, and passes JESD201 Class 2 whisker testing. Its clamping voltage of 17.0 V at 388 A ensures robust protection of 12 V automotive electronics against load dump and inductive switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC blocking level for 12 V systems. |
| VBR (min/typ/max) | 11.1 / 11.7 / 12.3 V - Verified breakdown range at 5 mA test current; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 17.0 V at 388 A - Clamping voltage under 10/1000 μs surge; guarantees downstream ICs see ≤17 V during worst-case transients. |
| PPPM (10/1000 μs) | 6600 W - Peak pulse power rating; supports high-energy load dump surges per ISO7637-2 without failure. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot engine compartments without derating. |
| RθJM | 0.35 °C/W - Junction-to-mount thermal resistance; confirms efficient heat transfer to PCB copper or heatsink. |
| Leakage @ VWM | ≤15 μA at 25 °C - Low reverse leakage preserves battery life and avoids false triggering in always-on circuits. |
Pinout & Package
Package: DO-218AB - Surface-mount, single-ended, metal heatsink cathode configuration with anode terminal on heatsink base. Meets UL 94 V-0 flammability rating and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current entry point during clamping | Large metal base serves as primary current path and thermal interface; must be connected to system ground plane or heatsink. |
| Cathode (Lead 1) | Current exit point during clamping | Standard soldered lead; connects to protected line (e.g., battery rail); polarity-critical for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR across temperature and lifetime, critical for automotive field reliability. |
| AEC-Q101 qualification | Validated stress testing (HTGB, H3TRB, TCT, etc.) confirms suitability for automotive power electronics per industry standard. |
| ISO7637-2 compliance | Meets Pulse 5a/b load dump requirements when mounted per recommended layout, enabling direct use in OEM designs. |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity concerns; peak reflow tolerance up to 245 °C. |
| Low clamping ratio (VC/VBR) | 17.0 V / 11.7 V ≈ 1.45 - Tight ratio minimizes overvoltage exposure while maintaining margin against false triggering. |
Applications
| Automotive Load Dump Protection | 12 V Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting engine control units (ECUs), body control modules (BCMs), and infotainment systems from alternator load dump transients (up to 60 V, 400 ms) in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Primary shunt clamping device placed directly at battery input, conducting surge current away from downstream regulators and microcontrollers. Use Value: Limits voltage seen by protected ICs to ≤17.0 V during 388 A transients, preventing latch-up or permanent damage per ISO7637-2 Pulse 5. | Use Scenario: Safeguarding power distribution networks in ADAS cameras, radar modules, and telematics units exposed to inductive switching noise from solenoids, relays, and motors. IC Role / Device Role / Timing Role: Fast-response transient suppressor installed at point-of-load, activated within nanoseconds to clamp spikes before reaching sensitive analog front-ends. Use Value: Delivers 6600 W peak pulse power handling with <1 ns response time, ensuring immunity to repetitive 10/1000 μs surges up to 388 A. |
| Industrial Motor Drive I/O Protection | Commercial Vehicle Battery Management |
Use Scenario: Shielding PLC digital I/O channels and sensor interfaces in factory automation equipment subjected to back-EMF from contactors and variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground, absorbing negative-going transients induced by inductive loads. Use Value: Maintains ≤15 μA leakage at 10 V to avoid loading low-current sensor signals, while surviving 700 A non-repetitive forward surge (IFSM). | Use Scenario: Securing BMS monitoring circuits in heavy-duty trucks and buses where battery voltage can spike to 30+ V during regenerative braking or alternator regulation faults. IC Role / Device Role / Timing Role: High-temperature-stable clamping element mounted on thermally enhanced PCB zones, dissipating energy into copper planes via anode heatsink. Use Value: Operates reliably at TJ = 175 °C with RθJM = 0.35 °C/W, enabling compact placement near battery terminals without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Lower PPPM (400 W vs. 6600 W), DO-214AC package, RθJA = 60 °C/W, no AEC-Q101 qualification | Not suitable for automotive load dump; limited to low-energy ESD/surge in consumer or industrial controls | Select SMAJ10A only for cost-sensitive, non-automotive applications with <500 W surge requirements. |
| SM8S10AHE3_A/I | Same electrical specs and DO-218AB package, but uses HE3 suffix (RoHS, AEC-Q101, whisker-tested) instead of HM3/I; identical marking and thermal performance | No functional difference; HM3/I and HE3_A/I are dual-sourced variants with identical application scope | SM8S10AHE3_A/I is functionally interchangeable with SM8S10AHM3/I in all designs; verify tape-and-reel delivery mode (I = 13" reel, anode toward sprocket). |
Compared with SMAJ10A, SM8S10AHM3/I delivers 16.5× higher surge power and automotive qualification; versus SM8S10AHE3_A/I, it shares identical clamping, thermal, and reliability behavior but differs only in packaging logistics and traceability coding - both support full drop-in replacement in AEC-Q101-compliant 12 V systems.
Availability
SM8S10AHM3/I is available at Aetrix Electronics and suitable for automotive ECU protection, 12 V power rail surge suppression, and industrial motor drive I/O requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SM8S10AHM3/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, MOSFETs, and TVS devices for automotive, industrial, and computing markets.
The SM8S family is engineered specifically for high-energy automotive transient suppression, with emphasis on load dump resilience, 175 °C operation, and ISO7637-2 compliance - targeting next-generation 12 V vehicle power architectures.
FAQ
What is the maximum clamping voltage of the SM8S10AHM3/I under a 10/1000 μs surge?
The SM8S10AHM3/I clamps to a maximum of 17.0 V when subjected to its rated peak pulse current of 388 A using the 10/1000 μs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number 88387, Page 2), and reflects worst-case performance at TA = 25 °C. The SM8S10AHM3/I maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient (0.069 %/°C).
Is the SM8S10AHM3/I qualified for automotive applications?
Yes, the SM8S10AHM3/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88387, Page 1). It undergoes rigorous stress testing including HTGB, H3TRB, and temperature cycling to validate reliability for under-hood automotive use. The "H" in the part number denotes AEC-Q101 qualification, and the device meets ISO7637-2 load dump requirements when applied per recommended layout guidelines.
What does the "HM3/I" suffix indicate in SM8S10AHM3/I?
The "HM3/I" suffix identifies the packaging and compliance configuration: "H" = AEC-Q101 qualified, "M3" = DO-218AB package with specific molding compound and termination, and "I" = 13-inch diameter plastic tape-and-reel delivery with anode oriented toward the sprocket hole. This matches the ordering information table on Page 3 of the Vishay datasheet (88387), confirming RoHS compliance, JESD201 Class 2 whisker resistance, and MSL Level 1 rating.
Can the SM8S10AHM3/I replace the older SM8S10A in existing designs?
Yes, the SM8S10AHM3/I is a direct replacement for SM8S10A in new and legacy designs. Both share identical electrical specifications (VWM = 10 V, VBR = 11.1–12.3 V, VC = 17.0 V), DO-218AB package dimensions, and thermal characteristics. The HM3/I variant adds AEC-Q101 qualification and updated material compliance (RoHS, halogen-free), making it suitable for upgraded automotive programs without PCB or layout changes.
What is the thermal resistance from junction to mount (RθJM) for the SM8S10AHM3/I?
The SM8S10AHM3/I has a typical junction-to-mount thermal resistance (RθJM) of 0.35 °C/W, as specified in the Thermal Characteristics table (Page 2, Document Number 88387). This low value is achieved via its metal heatsink anode construction and confirms efficient heat transfer to the PCB copper pour or external heatsink - essential for sustaining repeated surge events in high-temperature automotive environments.
SM8S10AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 388A
- 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
SM8S10AHM3/I FAQ
1.How can I place an order for SM8S10AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S10AHM3/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 SM8S10AHM3/I reliable?
The price and inventory of SM8S10AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S10AHM3/I is usually 5 days.
3.What payment methods are accepted for SM8S10AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S10AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S10AHM3/I?
SM8S10AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S10AHM3/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 SM8S10AHM3/I?
For technical support, including SM8S10AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S10AHM3/I requirements.
6.How does Aetrix verify that SM8S10AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM8S10AHM3/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 SM8S10AHM3/I meets industry standards.
7.What is the process for return or replacement of SM8S10AHM3/I?
All SM8S10AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S10AHM3/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 SM8S10AHM3/I part is unused and in its original packaging.
Return procedure for SM8S10AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S10AHM3/I Tags
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