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Vishay General Semiconductor - Diodes Division 3KASMC11AHM3_B/H
- Part No.:
- 3KASMC11AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHM3_B/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC11AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) package, rated for 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 185 °C max junction temperature, and AEC-Q101 qualified for automotive use.
For engineers reviewing the 3KASMC11AHM3_B/H datasheet, 3KASMC11AHM3_B/H pinout, 3KASMC11AHM3_B/H application, or 3KASMC11AHM3_B/H equivalent, this device serves as a high-reliability clamping protector for automotive sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces where fast response (<1 ns), low clamping voltage (18.2 V at IPPM), and MSL Level 1 solderability are critical.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and elevated ambient temperatures up to 150 °C. Its unidirectional polarity and 1.0 mA test current ensure precise VBR specification with ±5% tolerance across the 12.2–13.5 V range.
The device delivers 18.2 V maximum clamping voltage at rated IPPM, exhibits 0.072 %/°C temperature coefficient of VBR, and maintains low incremental surge resistance-enabling effective suppression of inductive switching transients on 12 V automotive power rails and CAN/LIN bus signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V nominal systems. |
| VBR (min/typ/max) | 12.2 / 12.9 / 13.5 V at 1.0 mA - Tight breakdown window ensures predictable turn-on and compatibility with downstream overvoltage thresholds. |
| VC at IPPM | 18.2 V - Clamping voltage under 3000 W 10/1000 μs surge; limits transient energy delivered to protected ICs below damage thresholds. |
| PPPM | 3000 W - Peak pulse power handling capability per standard waveform; supports robust protection against ISO 7637-2 Pulse 1/2a/5a events. |
| TJ max | +185 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures without derating. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.11 mm x 6.60 mm footprint and 3.20 mm height; compatible with automated placement and reflow. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC-Q101 Rev G. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0 flammability rating and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to system ground or low-side reference in unidirectional configuration. | Provides low VF (3.5 V @ 100 A) path for surge return; must be routed with low-inductance ground plane for effective clamping. |
| Cathode | Protected line connection; receives transient voltage and initiates avalanche breakdown when V > VBR. | Connected directly to sensitive node (e.g., MCU I/O pin); color band identifies polarity to prevent reverse installation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift <±5% over 1000 hrs HTOL at 150 °C, ensuring long-term clamping consistency in harsh environments. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without moisture-induced popcorn failure-no baking required pre-assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 16750-2 load dump edges), improving protection margin for 3.3 V/5 V logic. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills EU ELV and China RoHS requirements; eliminates brominated flame retardants while maintaining UL 94 V-0 performance. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and ECU input pin. Use Value: Limits transient voltage to ≤18.2 V, preventing latch-up or oxide breakdown in 5 V ADC front-ends while supporting 185 °C under-hood operation. |
Use Scenario: Safeguarding digital enable/disable signals and feedback lines in servo drive controllers subject to inductive kickback from 24 V solenoid loads. IC Role / Device Role / Timing Role: Fast-response transient suppressor on isolated GPIO lines interfacing with optocoupled gate drivers. Use Value: Responds in <1 ns to suppress 100 V/μs edges, reducing false triggering and enabling reliable 10 kHz PWM command transmission. |
| Telecom Power Interface | Consumer USB-C Port Protection |
Use Scenario: Guarding 48 V DC power inputs of PoE-powered network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS on secondary-side DC bus prior to DC/DC converter input. Use Value: Handles 3000 W peak pulses without degradation, maintaining clamping performance after ≥1000 surges per IEC 61000-4-5 Level 4 compliance testing. |
Use Scenario: Protecting VBUS and CC lines in USB-C receptacles against ESD and hot-plug transients in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) TVS placed adjacent to connector pins. Use Value: Provides 15 kV contact ESD immunity per IEC 61000-4-2 while adding <0.5 pF parasitic capacitance to preserve USB 2.0 signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11AHE3_A/H | Same SMC package, 11 V VWM, but lower PPPM (400 W) and TJ max (150 °C); not AEC-Q101 qualified. | Suitable for non-automotive consumer/industrial applications with lower surge severity and ambient temperature <125 °C. | Select when cost sensitivity outweighs automotive qualification and 3000 W surge headroom is unnecessary. |
| TPSMD11A | Same 11 V VWM and SMC package, but 3000 W PPPM and AEC-Q101 qualified; higher VC (19.5 V) and wider VBR tolerance (12.2–14.6 V). | Acceptable for automotive ECUs where slightly higher clamping voltage is tolerable and alternate supply chain diversification is needed. | Choose when dual-sourcing from Texas Instruments is required and 1.3 V higher VC does not violate downstream IC absolute maximum ratings. |
Compared with SMAJ11AHE3_A/H and TPSMD11A, the 3KASMC11AHM3_B/H provides superior thermal robustness (185 °C vs. 150 °C/175 °C), tighter VBR distribution (±5% vs. ±8%), and halogen-free compliance-making it optimal for next-generation automotive modules requiring extended lifetime under thermal stress.
Availability
3KASMC11AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O protection, and telecom power input circuits requiring stable component supply, AEC-Q101 qualification, and high-temperature reliability.
Supply support for 3KASMC11AHM3_B/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family was developed specifically for automotive and industrial transient suppression, targeting under-hood ECUs, battery management systems, and factory automation controllers needing 185 °C operation and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the 3KASMC11AHM3_B/H under full-rated surge conditions?
The 3KASMC11AHM3_B/H has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured at the specified test current and reflects worst-case voltage seen by the protected circuit during a 3000 W transient event. The 3KASMC11AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC11AHM3_B/H suitable for use in automotive applications requiring AEC-Q101 qualification?
Yes, the 3KASMC11AHM3_B/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88480. It undergoes full stress testing-including high-temperature reverse bias, temperature cycling, and ESD-to meet automotive reliability requirements. The 3KASMC11AHM3_B/H is approved for use in engine control units, body control modules, and ADAS sensor interfaces.
What is the thermal resistance from junction to ambient (RθJA) for the 3KASMC11AHM3_B/H in standard mounting conditions?
The typical thermal resistance from junction to ambient (RθJA) for the 3KASMC11AHM3_B/H is 77.5 °C/W when mounted on the minimum recommended pad layout per the datasheet. This value assumes no additional heatsinking and defines the self-heating behavior during sustained power dissipation. For the 3KASMC11AHM3_B/H, this enables safe operation at up to 6.0 W continuous power at 25 °C ambient.
Does the 3KASMC11AHM3_B/H have halogen-free construction?
Yes, the "HM3" suffix in 3KASMC11AHM3_B/H indicates halogen-free, RoHS-compliant construction per Vishay's material categorization standard. The molding compound contains no brominated or chlorinated flame retardants while maintaining UL 94 V-0 flammability rating. This meets strict environmental requirements for automotive and industrial end equipment.
What is the reverse leakage current of the 3KASMC11AHM3_B/H at its stand-off voltage and elevated temperature?
At its 11 V stand-off voltage (VWM) and 25 °C, the 3KASMC11AHM3_B/H exhibits a maximum reverse leakage current (IR) of 5.0 μA. At 150 °C and the same VWM, the leakage increases to a maximum of 50 μA-still within safe operational limits for most signal-line protection applications. This temperature-dependent behavior is fully characterized in the datasheet's electrical characteristics table.
3KASMC11AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 165A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
3KASMC11AHM3_B/H FAQ
1.How can I place an order for 3KASMC11AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHM3_B/H 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 3KASMC11AHM3_B/H reliable?
The price and inventory of 3KASMC11AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC11AHM3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHM3_B/H?
3KASMC11AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHM3_B/H 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 3KASMC11AHM3_B/H?
For technical support, including 3KASMC11AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHM3_B/H requirements.
6.How does Aetrix verify that 3KASMC11AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHM3_B/H 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 3KASMC11AHM3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHM3_B/H?
All 3KASMC11AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHM3_B/H, 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 3KASMC11AHM3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC11AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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