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Vishay General Semiconductor - Diodes Division 3KASMC11AHM3_A/H
- Part No.:
- 3KASMC11AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHM3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,976
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Product details
Overview
3KASMC11AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode designed for high-energy surge clamping in automotive and industrial power rails. It features a 12.2 V to 13.5 V breakdown voltage (VBR), 11 V stand-off voltage (VWM), 3000 W peak pulse power (10/1000 µs), 185 °C maximum junction temperature, and DO-214AB (SMC) package - used to protect MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC11AHM3_A/H datasheet, 3KASMC11AHM3_A/H pinout, 3KASMC11AHM3_A/H application, or 3KASMC11AHM3_A/H equivalent, key selection criteria include clamping voltage at rated surge current (18.2 V @ 165 A), unidirectional polarity, AEC-Q101 qualification, thermal resistance (RθJA = 77.5 °C/W), and MSL Level 1 reflow compatibility.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under high-temperature stress. Its 185 °C TJ(max) rating enables operation in under-hood automotive environments and industrial motor drives where ambient temperatures exceed 125 °C.
The device delivers 3000 W peak pulse power with low incremental surge resistance and fast response time, enabling effective clamping of transient energy before downstream components are damaged. It meets JESD201 Class 2 whisker testing and UL 94 V-0 flammability requirements for SMT reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 12.2 V / 13.5 V - ensures reliable breakdown above 11 V operating rail while maintaining margin against false triggering |
| VWM | 11 V - maximum continuous reverse voltage the device blocks without significant leakage (≤5 µA) |
| VC @ IPPM | 18.2 V - clamping voltage during 165 A 10/1000 µs surge, limiting stress on protected MOSFET gate or IC supply pin |
| PPPM | 3000 W - handles high-energy transients from inductive load switching (e.g., solenoids, relays, motors) |
| TJ(max) | 185 °C - supports AEC-Q101 qualification and sustained operation in hot automotive engine compartments |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and matte tin-plated leads |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
DO-214AB (SMC) package with cathode indicated by molded band; two-terminal device with no internal circuitry requiring orientation beyond polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side return path; must be routed with low-inductance trace for effective surge shunting |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); color band identifies this terminal for correct PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term stability at 185 °C junction temperature |
| Clamping performance | 18.2 V clamping voltage at 165 A ensures MOSFET gate oxide and logic IC supply pins remain within safe voltage limits |
| Thermal robustness | RθJL = 18.3 °C/W enables efficient heat transfer to PCB copper, supporting sustained 6.0 W power dissipation at TL = 75 °C |
| Manufacturing compliance | Meets J-STD-020 MSL Level 1 (260 °C peak reflow), JESD201 Class 2 whisker resistance, and UL 94 V-0 flammability |
| Automotive qualification | AEC-Q101 certified - validated for vibration, thermal shock, and high-temperature reverse bias life testing per automotive standards |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Suppressing load-dump and inductive kickback transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ground to clamp surges before they reach power management ICs or microcontrollers. Use Value: 185 °C TJ(max) and AEC-Q101 qualification ensure reliability in under-hood environments where ambient exceeds 105 °C. |
Use Scenario: Protecting IGBT gate drivers and bus voltage monitors from switching spikes in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC link capacitor to limit overvoltage during rapid IGBT turn-off events. Use Value: 3000 W peak pulse power and 18.2 V clamping voltage prevent destructive overvoltage on sensitive analog monitoring circuits. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Safeguarding AC/DC front-end rectifiers and PFC controllers against lightning-induced surges on telecom base station power inputs. IC Role / Device Role / Timing Role: Primary-level TVS on bulk input rail to absorb differential-mode transients before they propagate into regulation stages. Use Value: Low RθJA (77.5 °C/W) and 6.0 W steady-state dissipation support continuous operation in enclosed, convection-limited enclosures. |
Use Scenario: Shielding MCU reset lines and sensor interface traces from ESD and relay coil flyback in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Localized TVS on 3.3 V or 5 V signal rails adjacent to connectors and mechanical switches. Use Value: Fast response time and 11 V VWM allow integration without interfering with normal logic-level signaling or causing false resets. |
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), higher VC (18.2 V same, but at only 22.5 A), smaller SMA package (RθJA ≈ 110 °C/W) | Suitable for lower-energy consumer applications; not AEC-Q101 qualified or rated for >150 °C operation | Select when cost sensitivity outweighs automotive qualification and high-energy surge capability |
| 1.5KE11A | Through-hole TO-204AA (DO-41), 1500 W PPPM, same VBR range, higher VC (18.2 V @ 83 A), no AEC-Q101 | Requires PCB through-hole mounting; lacks MSL Level 1 reflow compatibility and high-temp junction rating | Choose only for legacy designs with existing DO-41 footprints and no automotive or high-reliability requirements |
Compared with SMAJ11A and 1.5KE11A, the 3KASMC11AHM3_A/H provides 7.5× higher peak pulse power, AEC-Q101 validation, 185 °C operation, and SMT-compatible DO-214AB packaging - making it uniquely suited for next-generation automotive and industrial systems demanding both ruggedness and manufacturability.
Availability
3KASMC11AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive DC bus clamping, and telecom power supply surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for 3KASMC11AHM3_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, thermal performance, and automotive-grade qualification.
The 3KASMC series was developed specifically for high-temperature, high-reliability transient suppression in automotive power distribution and industrial control systems - delivering robust clamping where conventional TVS diodes fail.
FAQ
What is the clamping voltage of the 3KASMC11AHM3_A/H at its rated peak pulse current?
The 3KASMC11AHM3_A/H has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 165 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components like MOSFETs or microcontrollers remain within safe operating voltage limits during surge events.
Is the 3KASMC11AHM3_A/H suitable for automotive applications?
Yes, the 3KASMC11AHM3_A/H is AEC-Q101 qualified and rated for a maximum junction temperature of 185 °C, making it suitable for under-hood automotive applications such as engine control units, body electronics, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 reflow requirements and JESD201 Class 2 whisker resistance standards.
What does the "HM3_A/H" suffix indicate in 3KASMC11AHM3_A/H?
The "HM3" denotes the RoHS-compliant, AEC-Q101-qualified DO-214AB (SMC) package variant; "_A/H" specifies the packaging format: 7-inch plastic tape-and-reel with 850 units per reel. The "A" indicates revision level, and "H" is the preferred package code per Vishay's ordering nomenclature.
How does the thermal resistance of the 3KASMC11AHM3_A/H affect PCB layout?
The 3KASMC11AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout. To maintain safe junction temperatures, designers must use adequate copper area (≥1 cm² per lead) and avoid thermal isolation - especially critical in high-power surge scenarios where transient heating is localized and intense.
Can the 3KASMC11AHM3_A/H replace older TVS diodes like P6KE11A in existing designs?
The 3KASMC11AHM3_A/H is not a direct drop-in replacement for P6KE11A due to different package (DO-214AB vs. DO-15), higher power rating (3000 W vs. 600 W), and tighter VBR tolerance. While electrical parameters overlap, PCB layout changes are required, and the enhanced performance justifies redesign for automotive or industrial upgrades where reliability and surge margin are critical.
3KASMC11AHM3_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)
3KASMC11AHM3_A/H FAQ
1.How can I place an order for 3KASMC11AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHM3_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 3KASMC11AHM3_A/H reliable?
The price and inventory of 3KASMC11AHM3_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 3KASMC11AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHM3_A/H?
3KASMC11AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHM3_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 3KASMC11AHM3_A/H?
For technical support, including 3KASMC11AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC11AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHM3_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 3KASMC11AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHM3_A/H?
All 3KASMC11AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHM3_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 3KASMC11AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC11AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC11AHM3_A/H Tags
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