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Vishay General Semiconductor - Diodes Division 3KASMC11AHE3/9AT
- Part No.:
- 3KASMC11AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHE3/9AT.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,498
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Product details
Overview
3KASMC11AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) 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 power rail protection.
For engineers reviewing the 3KASMC11AHE3/9AT datasheet, 3KASMC11AHE3/9AT pinout, 3KASMC11AHE3/9AT application, or 3KASMC11AHE3/9AT equivalent, this device serves as a high-reliability clamping solution for inductive switching transients on 12 V automotive subsystems, sensor signal lines, and MOSFET gate drivers where thermal stability and surge robustness are critical.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability at TJ = 185 °C, enabling operation in under-hood automotive environments. Its unidirectional polarity and low incremental surge resistance ensure fast clamping response (<1 ns) and minimal voltage overshoot during 10/1000 μs transients.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is RoHS-compliant with HM3 suffix meeting JESD 201 Class 2 whisker test requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below 12 V nominal automotive rail. |
| VBR (min/max) | 12.2 V / 13.5 V at IT = 1 mA - Confirmed breakdown threshold ensures reliable turn-on during overvoltage events without premature conduction. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy transients such as load dump or ISO 7637-2 Pulse 5a without failure. |
| VC @ IPPM | 18.2 V - Clamped voltage at peak surge current; limits downstream IC stress to safe levels during transient suppression. |
| TJ max. | +185 °C - Enables placement near heat sources (e.g., engine control units) without derating concerns in automotive applications. |
| IFSM | 200 A (8.3 ms half-sine) - Withstands repetitive inrush or fault currents in motor driver and power supply circuits. |
| RθJA | 77.5 °C/W - Thermal resistance defines power dissipation limit on standard PCB pad layout; guides heatsinking decisions. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Dimensions: 7.75 mm × 6.22 mm × 2.90 mm (L × W × H); RoHS-compliant molding compound (UL 94 V-0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected circuit ground or low-side reference; completes clamping loop during reverse surge. |
| Cathode | Reverse-biased terminal / clamping node | Connected to protected line (e.g., 12 V rail or signal); conducts when voltage exceeds VBR to shunt surge energy. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and leakage performance across 185 °C lifetime operation. |
| AEC-Q101 qualification | Validated reliability for automotive electronics including temperature cycling, humidity bias, and mechanical shock testing. |
| Low incremental surge resistance | Minimizes VC rise under high IPPM, improving clamping precision and reducing voltage overshoot on sensitive nodes. |
| MSL Level 1 rating | Enables single-pass reflow assembly at 260 °C peak without moisture-induced damage or delamination. |
| Uni-directional polarity | Prevents forward conduction during normal operation while delivering full 3000 W clamping capability on reverse transients. |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed power rails in vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy to protect DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to 18.2 V at 165 A surge, preventing overvoltage damage to downstream 24 V tolerant regulators and logic. |
Use Scenario: Shields ECU input pins from inductive kickback generated by fuel injector or solenoid drivers. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector interface to absorb sub-100 ns spikes. Use Value: Achieves <1 ns response time and 18.2 V clamping, maintaining signal integrity for 5 V analog sensor inputs and digital command lines. |
| Automotive Sensor Signal Line Protection | MOSFET Gate Driver Protection |
Use Scenario: Guards LIN bus or analog sensor outputs (e.g., oxygen sensor, throttle position) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with signal traces to clamp ±15 kV contact ESD per IEC 61000-4-2. Use Value: Delivers 18.2 V clamping with <100 pF junction capacitance at zero bias, preserving signal bandwidth up to 10 MHz. |
Use Scenario: Protects high-side/low-side gate drivers from Miller-induced voltage spikes during fast-switching SiC/MOSFET operation. IC Role / Device Role / Timing Role: Clamps gate-source or gate-drain overvoltage during dV/dt-induced coupling or shoot-through faults. Use Value: Withstands 200 A non-repetitive surge (8.3 ms) and maintains stable VBR across -65 °C to +185 °C, ensuring gate oxide safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Lower PPPM (400 W), same DO-214AC (SMA) package, VWM = 11 V, VC = 18.2 V, but TJ max = 150 °C. | Not AEC-Q101 qualified; suitable for industrial/commercial, not automotive under-hood use. | Select SMAJ11A only for cost-sensitive non-automotive designs where 3000 W surge capacity and 185 °C operation are unnecessary. |
| 1.5KE11A | Through-hole DO-201AE package, higher VF (3.5 V), same VWM/VBR, but lower thermal mass and no MSL rating. | Limited to board-level prototyping or low-volume assemblies; incompatible with automated SMT lines. | Choose 1.5KE11A only for legacy through-hole designs or manual repair scenarios where SMT compatibility is not required. |
Compared with SMAJ11A and 1.5KE11A, the 3KASMC11AHE3/9AT delivers 7.5× higher peak pulse power, 35 °C higher junction temperature rating, and automotive-grade qualification-making it the sole option for production automotive ECUs requiring AEC-Q101 compliance and sustained 125 °C ambient operation.
Availability
3KASMC11AHE3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) input hardening, and sensor signal line safeguarding requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for 3KASMC11AHE3/9AT 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS platform, engineered specifically for automotive-grade transient suppression with extended temperature range, high surge robustness, and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the 3KASMC11AHE3/9AT under peak surge conditions?
The 3KASMC11AHE3/9AT exhibits a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM = 165 A) using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for protected circuits. The 3KASMC11AHE3/9AT maintains this clamping performance across its full operating temperature range (-65 °C to +185 °C).
Is the 3KASMC11AHE3/9AT qualified for automotive applications?
Yes, the 3KASMC11AHE3/9AT is AEC-Q101 qualified and designed explicitly for automotive use. It meets stringent reliability requirements including temperature cycling, high-temperature reverse bias, and mechanical shock testing. Its 185 °C maximum junction temperature and MSL Level 1 reflow rating make the 3KASMC11AHE3/9AT suitable for under-hood modules such as body control units and powertrain ECUs.
What package type does the 3KASMC11AHE3/9AT use, and what are its key mechanical features?
The 3KASMC11AHE3/9AT uses the DO-214AB (SMC) surface-mount package, measuring 7.75 mm × 6.22 mm × 2.90 mm. Key features include UL 94 V-0 flammability-rated molding compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and cathode identification via a visible color band. The 3KASMC11AHE3/9AT also passes JESD 201 Class 2 whisker testing.
How does the 3KASMC11AHE3/9AT handle high-temperature environments?
The 3KASMC11AHE3/9AT supports continuous operation up to +185 °C junction temperature, enabled by junction passivation and optimized anisotropic rectifier technology. Its power derating curve (Fig. 6) shows linear reduction from 6.0 W at TL = 75 °C to zero at TJ = 185 °C. This thermal capability allows the 3KASMC11AHE3/9AT to remain functional in high-ambient zones like engine compartments without external heatsinking.
What is the surge current rating of the 3KASMC11AHE3/9AT, and how is it tested?
The 3KASMC11AHE3/9AT is rated for 200 A peak forward surge current (IFSM) using an 8.3 ms single half-sine waveform, per JEDEC standards. This rating reflects its ability to withstand repetitive inrush or fault currents in automotive power systems. The 3KASMC11AHE3/9AT also handles 165 A peak pulse current (IPPM) under 10/1000 μs transients, with clamping verified per Fig. 1 and Fig. 3 in the official Vishay datasheet (Doc. #89962).
3KASMC11AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 (SMCJ)
3KASMC11AHE3/9AT FAQ
1.How can I place an order for 3KASMC11AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHE3/9AT 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 3KASMC11AHE3/9AT reliable?
The price and inventory of 3KASMC11AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC11AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHE3/9AT?
3KASMC11AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHE3/9AT 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 3KASMC11AHE3/9AT?
For technical support, including 3KASMC11AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHE3/9AT requirements.
6.How does Aetrix verify that 3KASMC11AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHE3/9AT 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 3KASMC11AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHE3/9AT?
All 3KASMC11AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHE3/9AT, 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 3KASMC11AHE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC11AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC11AHE3/9AT Tags
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