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Vishay General Semiconductor - Diodes Division 3KASMC11AHE3_A/H
- Part No.:
- 3KASMC11AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHE3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC11AHE3_A/H 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 maximum junction temperature, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 3KASMC11AHE3_A/H datasheet, 3KASMC11AHE3_A/H pinout, 3KASMC11AHE3_A/H application, or 3KASMC11AHE3_A/H equivalent, key selection criteria include clamping voltage (18.2 V at IPPM), low incremental surge resistance, fast response time, TJ = 185 °C capability, and MSL Level 1 reflow compatibility - all critical for robust transient suppression in high-reliability power rails and signal lines.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance under repetitive surge stress and elevated temperature conditions. Its unidirectional polarity and 11 V stand-off voltage make it suitable for DC power line protection where reverse conduction must be blocked.
The device achieves 3000 W peak pulse power handling with a 10/1000 μs waveform while maintaining a low clamping voltage of 18.2 V at rated IPPM, enabling effective protection of downstream MOSFETs and ICs without overvoltage exposure. Thermal resistance (RθJA = 77.5 °C/W) and RθJL = 18.3 °C/W support reliable operation on standard PCB layouts per recommended pad dimensions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 18.2 V - Clamping voltage at peak surge current; limits voltage seen by protected circuitry. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump and inductive switching events. |
| TJ max. | +185 °C - Enables use in under-hood automotive modules and industrial environments without thermal derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and cathode band marking. |
Pinout & Package
DO-214AB (SMC) package: two-terminal surface-mount device with cathode indicated by a color band on the case. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Mounting pad layout defined per Vishay specification (0.126″ min width, 0.185″ max length).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential side of protected line. | Provides low VF (3.5 V at 100 A) path during surge events when clamped in forward direction. |
| Cathode | Current exit terminal; marked by color band; connected to higher-potential side (e.g., VCC rail). | Defines unidirectional clamping behavior - blocks reverse leakage (<5 μA at VWM) and conducts only when VKA ≥ VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage across temperature and lifetime. |
| High-temperature operation | TJ up to +185 °C enables deployment in engine control units and powertrain modules without derating. |
| Surge robustness | 200 A IFSM (8.3 ms half-sine) supports repeated inrush and fault-current events in 12 V/24 V systems. |
| Clamping efficiency | Low VC/VBR ratio (~1.42) minimizes overvoltage overshoot during fast transients like ISO 7637-2 Pulse 5a. |
| Manufacturing compliance | MSL Level 1 (260 °C peak reflow), RoHS-compliant, JEDEC JS709A halogen-free, and whisker-tested (JESD 201 Class 2). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges above 13.5 V while blocking reverse leakage. Use Value: Withstands 3000 W pulses and operates up to +185 °C, ensuring reliability in under-hood environments without derating. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100–200 pF at VWM) placed at connector interface to shunt transients before reaching ADC input. Use Value: Fast response time and 18.2 V clamping prevent latch-up or damage to precision front-end amplifiers and SAR ADCs. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Protection |
|
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail, coordinated with upstream fuses and secondary-side TVS for staged protection. Use Value: 3000 W rating and low Rsurge enable effective energy absorption without thermal runaway during multi-pulse stress. |
Use Scenario: Adding surge immunity to USB-C PD and AC/DC adapter outputs exposed to user-handling and system interconnects. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5 V/9 V/15 V output to suppress coupling from adjacent circuits and ESD on connectors. Use Value: AEC-Q101 qualification and MSL Level 1 ensure compatibility with automated SMT assembly and long-term field stability. |
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 | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 12.2–13.5 V; TJ max. = +150 °C. | Limited to low-energy consumer/industrial applications; not AEC-Q101 qualified. | Select SMAJ11A only for cost-sensitive non-automotive designs where 3000 W surge capacity is unnecessary. |
| 1.5KE11A | Through-hole DO-201AE package; same VBR range; PPPM = 1500 W; TJ max. = +175 °C; no AEC-Q101 qualification. | Requires through-hole assembly; unsuitable for high-density SMT layouts or automotive reflow profiles. | Choose 1.5KE11A only for legacy board upgrades or prototyping where SMT is unavailable and surge energy is ≤1500 W. |
Compared with SMAJ11A and 1.5KE11A, the 3KASMC11AHE3_A/H delivers triple the peak pulse power, full automotive qualification, and superior thermal endurance - making it the only option among the three validated for under-hood AEC-Q101 applications requiring sustained 3000 W surge handling.
Availability
3KASMC11AHE3_A/H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, telecom DC inputs, and consumer power adapter outputs requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for 3KASMC11AHE3_A/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The 3KASMC series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS platform, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial power systems.
FAQ
What is the clamping voltage of the 3KASMC11AHE3_A/H and how is it measured?
The 3KASMC11AHE3_A/H has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM). This value is measured under standardized 10/1000 μs waveform conditions per ANSI/IEEE C62.35, with IPPM derived from the 3000 W PPPM rating and VBR. The 3KASMC11AHE3_A/H maintains this clamping performance across its full operating temperature range up to +185 °C.
Is the 3KASMC11AHE3_A/H suitable for automotive applications?
Yes, the 3KASMC11AHE3_A/H is AEC-Q101 qualified and rated for TJ = –65 °C to +185 °C, making it suitable for under-hood automotive modules including engine control units, body controllers, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 reflow requirements, and its 3000 W surge rating aligns with ISO 16750-2 load-dump specifications.
What does the "_A/H" suffix mean in 3KASMC11AHE3_A/H?
The "_A/H" suffix in 3KASMC11AHE3_A/H indicates packaging: "H" denotes 7-inch plastic tape-and-reel delivery (850 units per reel), and "A" identifies the base P/NHM3 revision level. The "E3" denotes matte tin plating per JESD 22-B102, and the full part number confirms RoHS compliance and AEC-Q101 qualification per Vishay Document 89962.
How does the 3KASMC11AHE3_A/H compare to bidirectional TVS diodes?
The 3KASMC11AHE3_A/H is unidirectional and optimized for DC power line protection where reverse conduction must be blocked. Unlike bidirectional variants, it provides lower leakage (<5 μA at VWM) and tighter VBR tolerance in the forward direction, but cannot suppress negative-going transients. It is not interchangeable with bidirectional parts such as SMBJ11CA without circuit redesign.
What is the thermal resistance of the 3KASMC11AHE3_A/H and how does it affect PCB layout?
The 3KASMC11AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W and junction-to-leads (RθJL) of 18.3 °C/W. These values assume mounting on Vishay's recommended minimum pad layout (0.126″ × 0.185″). Deviating from this layout increases RθJA, potentially limiting power dissipation and requiring derating per Figure 6 in the 3KASMC11AHE3_A/H datasheet.
3KASMC11AHE3_A/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:
- 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_A/H FAQ
1.How can I place an order for 3KASMC11AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHE3_A/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 3KASMC11AHE3_A/H reliable?
The price and inventory of 3KASMC11AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC11AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHE3_A/H?
3KASMC11AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHE3_A/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 3KASMC11AHE3_A/H?
For technical support, including 3KASMC11AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC11AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHE3_A/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 3KASMC11AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHE3_A/H?
All 3KASMC11AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHE3_A/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 3KASMC11AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC11AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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