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Vishay General Semiconductor - Diodes Division 3KASMC11HE3_A/I
- Part No.:
- 3KASMC11HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11HE3_A/I.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,224
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Product details
Overview
3KASMC11HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 12.2–13.5 V breakdown voltage (VBR), and 185 °C maximum junction temperature. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive powertrain control units.
For engineers reviewing the 3KASMC11HE3_A/I datasheet, 3KASMC11HE3_A/I pinout, 3KASMC11HE3_A/I application, or 3KASMC11HE3_A/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, clamping performance at 165 A IPPM, thermal resistance (RθJA = 77.5 °C/W), and RoHS-compliant packaging details per Vishay Doc. #89962.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature operation up to TJ = 185 °C and meets AEC-Q101 stress test requirements for automotive under-hood applications. Its unidirectional polarity and low incremental surge resistance enable fast response (<1 ns) to ESD and load-dump events.
The device operates with a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown at 1 mA test current, and clamps to ≤18.2 V at 165 A peak pulse current - delivering precise overvoltage protection without false triggering in 12 V battery rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum reverse working voltage before conduction; ensures no leakage during normal 12 V system operation. |
| VBR (min/max) | 12.2 V / 13.5 V at IT = 1 mA - Tight breakdown tolerance enables predictable turn-on during transients. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump and ISO 7637-2 Pulse 5a events. |
| IPPM | 165 A - Peak surge current capability at which clamping voltage is guaranteed ≤18.2 V. |
| TJ max. | 185 °C - Enables placement near hot components (e.g., power MOSFETs, DC-DC converters) without derating. |
| RθJA | 77.5 °C/W - Thermal resistance measured on standard PCB pad layout; informs heatsinking requirements. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per JESD47. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VAK exceeds VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR drift <±5% over 1000 hrs at 150 °C. |
| Clamping ratio (VC/VBR) | ≤1.49 - Low ratio minimizes voltage overshoot on protected ICs during 165 A surge. |
| Response time | <1 ns - Fast enough to protect sensitive gate oxides of automotive MOSFETs against ESD and fast transients. |
| Solderability | Meets J-STD-002 and JESD22-B102 - Ensures reliable reflow attachment on production PCBs. |
| Whisker resistance | JESD201 Class 2 compliant - Prevents tin whisker growth in long-life automotive modules. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting MCU I/O and gate drivers in engine control units exposed to ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping transients before they reach downstream regulators and microcontrollers. Use Value: Maintains VCC integrity below 18.2 V during 3000 W surges, preventing brownout resets and latch-up in AEC-Q100 qualified MCUs. |
Use Scenario: Safeguarding position encoder signal lines (e.g., resolver or Hall-effect outputs) in servo drives subjected to back-EMF spikes from brushed DC motors. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface to shunt inductive kickback before it couples into differential receiver inputs. Use Value: Limits transient amplitude to ≤18.2 V while preserving signal integrity - critical for sub-degree angular accuracy in closed-loop motion control. |
| Automotive Body Electronics | Telecom Power Interface |
Use Scenario: Shielding LIN bus transceivers and LED driver ICs in door module ECUs from battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional clamp on VBAT-to-ground path, activated only during positive overvoltage events. Use Value: Withstands repeated 12 V system transients up to 185 °C junction temperature, supporting 15-year vehicle service life. |
Use Scenario: Protecting PoE-powered Ethernet PHYs and DC-DC controllers in outdoor base station power supplies against lightning-induced surges on 48 V input rails. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of active regulation, handling bulk energy before secondary TVS or MOV stages. Use Value: Delivers 3000 W pulse rating with low clamping voltage - reduces stress on downstream 60 V-rated FETs and improves overall system surge immunity to IEC 61000-4-5 Level 4. |
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-E3/57T | Lower PPPM (400 W), same DO-214AC (SMA) package, VBR = 12.2–13.5 V, RθJA = 110 °C/W | Not AEC-Q101 qualified; suitable for industrial/commercial only | Select when cost sensitivity outweighs automotive qualification and surge energy is ≤400 W. |
| 1.5KE11A | Through-hole DO-201AE package, PPPM = 1500 W, VBR = 12.2–13.5 V, TJ max = 175 °C | Larger footprint, lower thermal performance, not optimized for automated SMT assembly | Choose for legacy through-hole designs where board space and reflow compatibility are not constraints. |
Compared with SMAJ11A-E3/57T and 1.5KE11A, the 3KASMC11HE3_A/I provides 7.5× higher surge power handling, AEC-Q101 qualification, and superior thermal resistance - making it the only option qualified for under-hood automotive deployment with full SMT manufacturability.
Availability
3KASMC11HE3_A/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power interface applications requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC11HE3_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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC series is part of Vishay's PAR® (Protected Anisotropic Rectifier) TVS platform, engineered specifically for AEC-Q101-compliant transient suppression in harsh-temperature automotive environments.
FAQ
What is the clamping voltage of the 3KASMC11HE3_A/I at its rated peak pulse current?
The 3KASMC11HE3_A/I clamps to a maximum of 18.2 V at its rated peak pulse current of 165 A (10/1000 μs waveform), as specified in Vishay Document #89962. This clamping voltage ensures protected circuitry remains within safe operating limits during high-energy transients such as automotive load dump events. The 3KASMC11HE3_A/I achieves this with low incremental surge resistance and tight VBR tolerance.
Is the 3KASMC11HE3_A/I qualified for automotive use?
Yes, the 3KASMC11HE3_A/I is AEC-Q101 qualified per Vishay Document #89962, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its 185 °C maximum junction temperature rating and DO-214AB package construction make the 3KASMC11HE3_A/I suitable for under-hood automotive applications including engine control units and body control modules.
What package type does the 3KASMC11HE3_A/I use, and what are its key mechanical features?
The 3KASMC11HE3_A/I uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads, UL 94 V-0 flammability rating, and MSL Level 1 moisture sensitivity (260 °C peak reflow). Its dimensions are 6.22 mm × 5.59 mm × 2.41 mm, and it features a cathode band for polarity identification. The 3KASMC11HE3_A/I is designed for automated pick-and-place and reflow soldering per J-STD-002 standards.
How does the thermal performance of the 3KASMC11HE3_A/I compare to similar TVS diodes?
The 3KASMC11HE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout, significantly lower than standard SMA-package TVS diodes (~110 °C/W). This improved thermal performance allows the 3KASMC11HE3_A/I to sustain higher average power dissipation and operate reliably at elevated ambient temperatures - a key advantage in compact automotive and industrial power modules.
What is the meaning of the "_A/I" suffix in the 3KASMC11HE3_A/I part number?
The "_A/I" suffix in 3KASMC11HE3_A/I indicates the packaging configuration: "A" denotes the base qualification level (AEC-Q101), and "I" specifies the delivery mode as 13-inch diameter plastic tape and reel with a base quantity of 3500 units, per Vishay's ordering information table in Document #89962. The 3KASMC11HE3_A/I is RoHS-compliant and halogen-free per JEDEC JS709A standards.
3KASMC11HE3_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:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 149A
- 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)
3KASMC11HE3_A/I FAQ
1.How can I place an order for 3KASMC11HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11HE3_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 3KASMC11HE3_A/I reliable?
The price and inventory of 3KASMC11HE3_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 3KASMC11HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC11HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11HE3_A/I?
3KASMC11HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11HE3_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 3KASMC11HE3_A/I?
For technical support, including 3KASMC11HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC11HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC11HE3_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 3KASMC11HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC11HE3_A/I?
All 3KASMC11HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11HE3_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 3KASMC11HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC11HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC11HE3_A/I Tags
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