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Vishay General Semiconductor - Diodes Division 3KASMC11AHE3_A/I
- Part No.:
- 3KASMC11AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHE3_A/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,913
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Product details
Overview
3KASMC11AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 18.2 V under 165 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC11AHE3_A/I datasheet, 3KASMC11AHE3_A/I pinout, 3KASMC11AHE3_A/I application, or 3KASMC11AHE3_A/I equivalent, this device is selected for high-reliability DC bus protection where AEC-Q101 qualification, low clamping voltage, and MSL Level 1 reflow compatibility are mandatory design requirements.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable breakdown behavior and low incremental surge resistance. Its unidirectional architecture provides forward conduction capability while clamping reverse transients - critical for protecting power MOSFET sources or gate drivers in automotive DC-DC converters.
The device is rated for 11.1–13.5 V breakdown (VBR) at 1 mA, with 11 V stand-off voltage (VWM) and 18.2 V maximum clamping voltage (VC) at 165 A. Thermal resistance is 18.3 °C/W (junction-to-leads), supporting sustained operation under high ambient temperatures when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before leakage exceeds 5 μA; defines safe DC bus rating. |
| VBR (min/max) | 11.1 V / 13.5 V at 1 mA - Tight breakdown tolerance ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 18.2 V at 165 A - Clamping voltage limits stress on downstream components during 3000 W surge pulses. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy transients common in automotive load-dump and inductive kick scenarios. |
| TJ max. | 185 °C - Enables use in under-hood electronics and industrial motor drives 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 × 6.60 mm footprint and MSL Level 1 rating. |
Pinout & Package
Package: DO-214AB (SMC), cathode-indicated by molded band; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Protected line connection / Transient sensing node | Connected to the line being protected (e.g., 12 V rail); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR over lifetime and temperature cycling. |
| High-temperature capability | Rated for continuous operation up to 185 °C junction temperature - eliminates thermal derating in engine-control modules. |
| Low clamping ratio | VC/VWM = 1.65 - minimizes overvoltage margin required for protected ICs like CAN transceivers or microcontrollers. |
| Fast response time | < 1.0 ps - reacts before most semiconductor failure mechanisms initiate, preserving gate oxide integrity. |
| MSL Level 1 | Reflow-compatible up to 260 °C peak - supports standard SMT assembly without moisture sensitivity handling. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Clamps 18.2 V at 165 A, limiting stress on upstream fuse and downstream LDO regulators. |
Use Scenario: Safeguarding IGBT gate drivers from Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: TVS connected across gate-emitter terminals to clamp dv/dt overshoot. Use Value: Sub-nanosecond response prevents false turn-on and ensures reliable gate control timing. |
| Telecom DC Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Suppressing lightning-induced surges on -48 V telecom power inputs. IC Role / Device Role / Timing Role: Primary protection device ahead of DC-DC converter input stage. Use Value: 3000 W peak power rating handles multi-kA induced surges without degradation. |
Use Scenario: Shielding microcontroller I/O lines from relay coil flyback in washing machine control boards. IC Role / Device Role / Timing Role: Localized TVS on 5 V logic rail near relay driver output. Use Value: 11 V stand-off voltage avoids interference with normal 5 V signaling while clamping >20 V transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/57T | Lower PPPM (400 W), same DO-214AC (SMA) package, VC = 18.2 V at 22 A | Suitable only for lower-energy transients (e.g., ESD, low-current inductive spikes) | Select when cost sensitivity outweighs surge energy requirement and board space allows larger footprint. |
| SMCJ11AHE3_A/H | Same 3000 W rating and DO-214AB package, but non-AEC-Q101 qualified and higher VBR tolerance (11.1–13.5 V vs. 11.1–14.0 V) | Lacks automotive qualification; acceptable for industrial/commercial use only | Choose for non-automotive designs requiring identical electrical performance without AEC validation overhead. |
Compared with SMAJ11A-E3/57T and SMCJ11AHE3_A/H, the 3KASMC11AHE3_A/I uniquely combines AEC-Q101 qualification, 185 °C operation, and 3000 W surge capability in a single DO-214AB device - making it the only option for under-hood automotive power rail protection meeting ISO 16750-2.
Availability
3KASMC11AHE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, telecom DC feeds, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.
Supply support for 3KASMC11AHE3_A/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 high-reliability and automotive-grade performance.
The 3KASMC series was developed specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial systems - prioritizing thermal stability, surge robustness, and reflow compatibility.
FAQ
What is the clamping voltage of the 3KASMC11AHE3_A/I under maximum surge conditions?
The 3KASMC11AHE3_A/I clamps to a maximum of 18.2 V when subjected to its rated peak pulse current of 165 A (10/1000 μs waveform). This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 3KASMC11AHE3_A/I suitable for automotive under-hood applications?
Yes, the 3KASMC11AHE3_A/I is AEC-Q101 qualified and rated for continuous operation up to +185 °C junction temperature - making it suitable for under-hood environments such as engine control units, transmission control modules, and body control modules where ambient temperatures exceed 125 °C.
What does the "_A/I" suffix indicate in 3KASMC11AHE3_A/I?
The "_A/I" suffix in 3KASMC11AHE3_A/I denotes the packaging configuration: "I" specifies 13-inch diameter plastic tape and reel with 3500 units per reel, while "A" indicates compliance with Vishay's HM3 base P/N revision standard - confirming RoHS compliance, AEC-Q101 qualification, and whisker-resistant matte tin plating.
How does the 3KASMC11AHE3_A/I compare to standard SMA-package TVS diodes?
The 3KASMC11AHE3_A/I uses the larger DO-214AB (SMC) package versus DO-214AC (SMA), enabling 3000 W peak pulse power - 7.5× higher than typical 400 W SMA devices like SMAJ11A. Its thermal resistance (RθJL = 18.3 °C/W) also supports higher sustained power dissipation in compact layouts where heatsinking is limited.
Can the 3KASMC11AHE3_A/I be used in bidirectional protection circuits?
No, the 3KASMC11AHE3_A/I is unidirectional only, as confirmed in the Vishay datasheet. It conducts in forward bias and clamps reverse transients - it cannot suppress positive-going transients on grounded lines. For bidirectional protection, a separate device such as the 3KASMC11CAHE3_A/I (complementary dual-diode version) must be selected.
3KASMC11AHE3_A/I 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/I FAQ
1.How can I place an order for 3KASMC11AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHE3_A/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 3KASMC11AHE3_A/I reliable?
The price and inventory of 3KASMC11AHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHE3_A/I?
3KASMC11AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHE3_A/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 3KASMC11AHE3_A/I?
For technical support, including 3KASMC11AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHE3_A/I requirements.
6.How does Aetrix verify that 3KASMC11AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHE3_A/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 3KASMC11AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHE3_A/I?
All 3KASMC11AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHE3_A/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 3KASMC11AHE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC11AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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