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Vishay General Semiconductor - Diodes Division SM8S13AHM3/I
- Part No.:
- SM8S13AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM8S13AHM3/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,202
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Product details
Overview
SM8S13AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 13 V stand-off voltage (VWM), 15.2 V nominal breakdown voltage (VBR), and 6600 W peak pulse power (10/1000 μs). It delivers AEC-Q101 qualification, 175 °C junction temperature capability, and low leakage (<10 μA at VWM), targeting automotive load dump protection.
For engineers reviewing the SM8S13AHM3/I datasheet, SM8S13AHM3/I pinout, SM8S13AHM3/I application, or SM8S13AHM3/I equivalent, this page provides verified electrical parameters, thermal performance data, DO-218AB mechanical interface details, and validated alternative parts for automotive-grade TVS selection.
Technical Context
The SM8S13AHM3/I employs passivated anisotropic rectifier technology to achieve stable clamping under high-energy transients, with a typical clamping voltage of 21.5 V at 307 A IPPM (10/1000 μs). Its TJ = 175 °C rating enables operation in under-hood automotive environments without derating.
It meets ISO 7637-2 surge requirements for load dump events and complies with MSL Level 1 per J-STD-020 (peak reflow 245 °C). The device features matte tin-plated leads, RoHS-compliant molding compound (UL 94 V-0), and heatsink-anode polarity configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (nom) | 15.2 V - Breakdown voltage at 5 mA test current; defines onset of avalanche conduction |
| VC @ IPPM | 21.5 V - Clamping voltage at 307 A peak pulse current; determines protected circuit stress level |
| PPPM (10/1000 μs) | 6600 W - Peak transient energy handling capacity; supports ISO 7637-2 Load Dump Waveform 5a |
| TJ max | +175 °C - Maximum junction temperature; enables placement near high-heat sources in engine control units |
| ID @ VWM | <10 μA - Reverse leakage at stand-off voltage; minimizes quiescent power loss in always-on systems |
| RθJM | 0.35 °C/W - Junction-to-mount thermal resistance; critical for heatsink-coupled PCB layout design |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with metal slug for enhanced thermal dissipation. Meets IPC 7351 footprint standard; UL 94 V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current entry point during clamping | Electrically connected to metal slug; must be thermally coupled to PCB copper pour or external heatsink |
| Cathode (Lead 1) | Current exit point during clamping | Standard solderable terminal; connects to protected line (e.g., 12 V rail) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS modules |
| Junction passivation | Stable VBR over lifetime and temperature; prevents parameter drift under thermal cycling |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 245 °C peak without moisture-induced damage |
| Low forward voltage drop | VF ≤ 1.8 V at 100 A pulse - reduces conduction loss during bidirectional surge events |
| High reliability at 175 °C | Enables use in proximity to powertrain components without thermal derating penalties |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Suppresses 12 V system voltage spikes up to 40 V caused by alternator field decay during battery disconnect. IC Role / Device Role / Timing Role: Primary clamping device on main power rail upstream of DC/DC converters and microcontrollers. Use Value: Limits rail voltage to ≤21.5 V during 6600 W transients, preventing latch-up or permanent damage to downstream ASICs. |
Use Scenario: Protects ECU main power input against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly at connector entry point before bulk capacitance. Use Value: Withstands ≥307 A peak pulse current while maintaining <10 μA leakage at 13 V, ensuring low standby current compliance. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Supply |
Use Scenario: Shields BCM microcontroller and CAN transceivers from transients induced by relay/coil switching in lighting and door modules. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V input with heatsink-anode mounting to chassis ground plane. Use Value: RθJM = 0.35 °C/W enables direct thermal coupling to metal enclosure, sustaining repeated 10/1000 μs surges without thermal runaway. |
Use Scenario: Safeguards 12 V input to image sensor and ISP power stage in automotive rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High-reliability clamping element meeting AEC-Q101 for mission-critical vision systems. Use Value: 175 °C TJ rating allows operation inside sealed camera housings exposed to solar loading and ambient temperatures >105 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S13AHE3/A | Same electrical specs; differs in packaging (tape/reel vs. bulk) and marking suffix (A vs. I); identical DO-218AB footprint and thermal performance | No functional difference; suitable for same automotive designs requiring AEC-Q101 and ISO 7637-2 compliance | Select SM8S13AHE3/A when ordering via standard Digi-Key/Mouser distribution channels with HE3 RoHS suffix |
| SM8S13AHM3/A | Identical VWM, VBR, PPPM, and thermal ratings; differs only in reel orientation marking (A vs. I); same AEC-Q101 qualification and DO-218AB mechanical form | Direct substitute in production lines using alternate tape coding conventions; no layout or thermal redesign needed | Choose SM8S13AHM3/A for programs aligned with Vishay's preferred P/N coding for automotive volume shipments |
Compared with SM8S13AHM3/I, both alternatives retain full electrical, thermal, and qualification equivalence-differences are limited to packaging logistics and internal marking codes, not performance or reliability.
Availability
SM8S13AHM3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power input, and body control module (BCM) power rail applications requiring stable component supply, AEC-Q101 traceability, and long-term lifecycle support.
Supply support for SM8S13AHM3/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, and protection devices with emphasis on automotive, industrial, and high-reliability applications.
The SM8S series is designed specifically for high-energy transient suppression in 12 V and 24 V automotive systems, delivering robust load dump protection with extended temperature capability and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the SM8S13AHM3/I at its rated peak pulse current?
The SM8S13AHM3/I has a maximum clamping voltage (VC) of 21.5 V when subjected to its rated peak pulse current of 307 A under the 10/1000 μs waveform. This value is specified in the Electrical Characteristics table of Vishay document 88387 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the SM8S13AHM3/I qualified for automotive applications?
Yes, the SM8S13AHM3/I is AEC-Q101 qualified and explicitly intended for automotive use. It meets ISO 7637-2 surge requirements for load dump and inductive switching transients, operates up to +175 °C junction temperature, and carries the "H" quality grade designation in its part number indicating automotive qualification.
What package type does the SM8S13AHM3/I use, and how is polarity configured?
The SM8S13AHM3/I uses the DO-218AB surface-mount package with heatsink-anode polarity: the metal slug serves as the anode terminal and must be electrically and thermally connected to system ground or a heatsink. Lead 1 is the cathode, and the device is unidirectional only.
Does the SM8S13AHM3/I meet moisture sensitivity level (MSL) requirements for standard SMT assembly?
Yes, the SM8S13AHM3/I is rated MSL Level 1 per J-STD-020, meaning it can withstand peak reflow temperatures up to 245 °C without preconditioning. This eliminates baking requirements and supports compatibility with standard lead-free reflow profiles in high-volume automotive PCB assembly.
How does the thermal resistance of the SM8S13AHM3/I impact PCB layout decisions?
The SM8S13AHM3/I has RθJM = 0.35 °C/W, indicating highly efficient heat transfer from junction to the metal heatsink. PCB layout must maximize copper area under the anode slug-ideally connecting to a large ground plane or external heatsink-to maintain safe junction temperatures during repetitive surge events.
SM8S13AHM3/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):
- 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
SM8S13AHM3/I FAQ
1.How can I place an order for SM8S13AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S13AHM3/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 SM8S13AHM3/I reliable?
The price and inventory of SM8S13AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S13AHM3/I is usually 5 days.
3.What payment methods are accepted for SM8S13AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S13AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S13AHM3/I?
SM8S13AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S13AHM3/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 SM8S13AHM3/I?
For technical support, including SM8S13AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S13AHM3/I requirements.
6.How does Aetrix verify that SM8S13AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM8S13AHM3/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 SM8S13AHM3/I meets industry standards.
7.What is the process for return or replacement of SM8S13AHM3/I?
All SM8S13AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S13AHM3/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 SM8S13AHM3/I part is unused and in its original packaging.
Return procedure for SM8S13AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S13AHM3/I Tags
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