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Vishay General Semiconductor - Diodes Division SM8S10CAHM3/I
- Part No.:
- SM8S10CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S10CAHM3/I.pdf
- Description:
- 6600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SM8S10CAHM3/I from Vishay General Semiconductor is a bidirectional 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), 17.0 V maximum clamping voltage at 388 A peak pulse current, and 6600 W peak pulse power (10/1000 μs). Rated for TJ = 175 °C and AEC-Q101 qualified, it protects sensitive electronics in 12 V automotive power systems.
For engineers reviewing the SM8S10CAHM3/I datasheet, SM8S10CAHM3/I pinout, SM8S10CAHM3/I application, or SM8S10CAHM3/I equivalent, this device is selected for high-reliability transient suppression where low leakage (<15 μA at VWM), ISO 7637-2 compliance, DO-218AC package thermal performance (RθJM = 0.35 °C/W), and halogen-free M3 construction are critical design requirements.
Technical Context
This TVS diode operates as a bidirectional clamping device with no polarity marking, leveraging silicon avalanche structure to limit transient overvoltages before they damage downstream circuitry. Its DO-218AC package integrates a metal heatsink terminal for low thermal resistance (RθJM = 0.35 °C/W) and supports high surge capability without derating up to TJ = 175 °C.
It meets ISO 7637-2 (load dump pulse 5a) and ISO 16750-2 test conditions for automotive environments, with verified clamping performance at IPPM = 388 A (10/1000 μs) and VC = 17.0 V - enabling robust protection of ECUs, body control modules, and infotainment power inputs against inductive switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage; defines safe DC/AC bias range before conduction begins. |
| VBR (min–max) | 11.1–12.3 V at IT = 5 mA - Ensures reliable turn-on margin above system nominal voltage (12 V) while avoiding false triggering. |
| VC @ IPPM | 17.0 V at 388 A (10/1000 μs) - Clamping voltage seen by protected ICs during worst-case surge; limits stress on downstream 15–20 V rated components. |
| PPPM | 6600 W (10/1000 μs) - Sustains high-energy transients typical of alternator load dump without failure. |
| ID @ VWM | ≤15 μA at 25 °C - Minimizes standby power loss and avoids interference in high-impedance sensing circuits. |
| TJ max | 175 °C - Enables operation in under-hood environments and supports AEC-Q101 qualification for automotive use. |
| Package | DO-218AC - Surface-mount package with integrated metal heatsink terminal; optimized for thermal dissipation and mechanical robustness. |
Pinout & Package
DO-218AC package with two terminals: Terminal 1 (anode side, marked per tape orientation) and Terminal 2 (metal heatsink/cathode side). The device is bidirectional - no cathode band; polarity is irrelevant for clamping function. Mounting pad layout follows IPC-7351 standard with exposed metal pad for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode-side lead (tape-defined anode orientation) | Provides electrical connection and mechanical anchoring; solderable per J-STD-002/JESD 22-B102. |
| Terminal 2 | Metal heatsink / common terminal | Serves as primary thermal path (RθJM = 0.35 °C/W) and second electrical terminal; requires PCB copper pour for optimal heat transfer. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and surge endurance per JEDEC standards. |
| Halogen-free, RoHS-compliant M3 construction | Meets automotive environmental mandates and enables compatibility with lead-free reflow profiles up to 245 °C peak. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH; eliminates baking requirement prior to assembly. |
| ISO 7637-2 & ISO 16750-2 compliance | Guarantees functional survival and clamping integrity during standardized automotive surge tests (e.g., Pulse 5a load dump). |
| Bidirectional clamping | Protects AC-coupled or floating-rail circuits without polarity sensitivity - simplifies board layout and eliminates orientation errors. |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects BCM microcontroller power rails from load dump transients generated by alternator regulation faults or battery disconnect events. IC Role / Device Role / Timing Role: Bidirectional TVS clamping device placed at 12 V input filter stage, upstream of DC/DC converter. Use Value: Limits clamped voltage to 17.0 V during 388 A surges, ensuring downstream 20 V-rated regulators and logic remain within absolute maximum ratings. |
Use Scenario: Shields ECU main power supply against inductive kickback from fuel injector or solenoid driver switching. IC Role / Device Role / Timing Role: Fast-response transient suppressor located adjacent to power entry connector, co-located with bulk capacitance. Use Value: Delivers 6600 W surge handling with <15 μA leakage, preserving low-power sleep mode integrity while surviving repeated ISO 16750-2 pulses. |
| Infotainment System Power Supply | ADAS Camera Module Input Protection |
Use Scenario: Guards USB-C or 12 V auxiliary power inputs in head units against hot-swap and cable-induced transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on unregulated input rail, before buck converter and LDO stages. Use Value: Maintains 10 V stand-off with 11.1 V min VBR to avoid conduction during normal 12.5 V battery float, yet triggers fast enough to limit spikes to 17.0 V. |
Use Scenario: Secures power input of 77 GHz radar or camera modules mounted near engine compartments subject to extreme thermal and surge stress. IC Role / Device Role / Timing Role: High-temperature-stable TVS on front-end power line, leveraging 175 °C junction rating and DO-218AC heatsink terminal. Use Value: Enables uninterrupted operation at ambient temperatures up to 125 °C while sustaining 5000+ surge cycles per ISO 7637-2 without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10CA | Lower PPPM (400 W vs. 6600 W); DO-214AC package; RθJA = 40 °C/W (no metal heatsink) | Rated for lower-energy transients (e.g., I/O line protection); unsuitable for load dump duty. | Select SMAJ10CA only for non-automotive, low-surge applications where board space is constrained and thermal budget permits higher junction rise. |
| TPSMD10CA | Same DO-218AC package; 6600 W PPPM; but VBR = 12.2–13.5 V (min 12.2 V) and VC = 18.2 V at 363 A | Marginally higher clamping voltage reduces protection margin for 15 V-rated devices. | TPSMD10CA offers identical surge rating and thermal performance but trades 1.2 V higher VC - acceptable if protected circuit has ≥18 V abs max rating. |
Compared with SMAJ10CA and TPSMD10CA, SM8S10CAHM3/I delivers superior energy handling and lower clamping voltage in the same footprint, making it the preferred choice for AEC-Q101-compliant 12 V automotive power rail protection where system-level surge immunity must meet ISO 7637-2 Pulse 5a.
Availability
SM8S10CAHM3/I is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, infotainment power supplies, and ADAS camera module designs requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SM8S10CAHM3/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 passive components for automotive, industrial, and computing markets.
The SM8SxxCA family is engineered specifically for high-energy automotive transient suppression, combining AEC-Q101 qualification, 175 °C operation, and DO-218AC thermal architecture to address load dump and ISO 16750-2 compliance challenges.
FAQ
What is the maximum clamping voltage of the SM8S10CAHM3/I at its rated peak pulse current?
The SM8S10CAHM3/I exhibits a maximum clamping voltage (VC) of 17.0 V when subjected to its rated peak pulse current of 388 A under the standard 10/1000 μs waveform. This value is measured per Figure 4 in the official Vishay datasheet (Doc. #98229) and ensures protected downstream components remain within safe operating voltage limits during surge events.
Is the SM8S10CAHM3/I suitable for automotive under-hood applications?
Yes, the SM8S10CAHM3/I is explicitly qualified to AEC-Q101 and rated for junction temperatures up to +175 °C, making it suitable for under-hood automotive applications. Its DO-218AC package with metal heatsink terminal and low RθJM (0.35 °C/W) enables reliable thermal management even in high-ambient environments such as engine compartments.
Does the SM8S10CAHM3/I have polarity markings on the package?
No, the SM8S10CAHM3/I is a bidirectional TVS diode and carries no cathode band or polarity marking. The DO-218AC package uses Terminal 1 (lead) and Terminal 2 (metal heatsink) symmetrically - either terminal may serve as anode or cathode depending on transient polarity, eliminating orientation concerns during placement.
What industry standards does the SM8S10CAHM3/I meet for automotive surge immunity?
The SM8S10CAHM3/I meets ISO 7637-2 (including Pulse 5a load dump) and ISO 16750-2 surge test requirements as verified in Vishay's characterization data. These certifications confirm its ability to suppress transients up to 6600 W without degradation, supporting compliance in automotive ECU, BCM, and ADAS subsystem designs.
What is the leakage current specification for SM8S10CAHM3/I at its stand-off voltage?
At its 10 V stand-off voltage (VWM) and TA = 25 °C, the SM8S10CAHM3/I specifies a maximum reverse leakage current (ID) of 15 μA. At elevated temperature (TJ = 175 °C), leakage remains ≤250 μA - a critical parameter for preserving low-power sleep modes in automotive electronics.
SM8S10CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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-218AB
SM8S10CAHM3/I FAQ
1.How can I place an order for SM8S10CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S10CAHM3/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 SM8S10CAHM3/I reliable?
The price and inventory of SM8S10CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S10CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM8S10CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S10CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S10CAHM3/I?
SM8S10CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S10CAHM3/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 SM8S10CAHM3/I?
For technical support, including SM8S10CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S10CAHM3/I requirements.
6.How does Aetrix verify that SM8S10CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM8S10CAHM3/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 SM8S10CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM8S10CAHM3/I?
All SM8S10CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S10CAHM3/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 SM8S10CAHM3/I part is unused and in its original packaging.
Return procedure for SM8S10CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S10CAHM3/I Tags
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