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Vishay General Semiconductor - Diodes Division 3KASMC14AHM3_B/I
- Part No.:
- 3KASMC14AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14AHM3_B/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,695
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Product details
Overview
3KASMC14AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 14 V stand-off voltage, 15.6–17.2 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature. It protects automotive sensor signal lines and MOSFET gates against inductive switching transients.
For engineers reviewing the 3KASMC14AHM3_B/I datasheet, 3KASMC14AHM3_B/I pinout, 3KASMC14AHM3_B/I application, or 3KASMC14AHM3_B/I equivalent, key selection criteria include clamping voltage (23.2 V at 129 A), unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, and SMC package thermal performance under high-reliability automotive conditions.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and high-temperature operation up to TJ = 185 °C. Its low incremental surge resistance and fast response time enable effective suppression of ESD and load-dump transients in automotive ECUs.
The device operates exclusively in unidirectional mode with cathode-band polarity marking, meets MSL Level 1 per J-STD-020, and is qualified to AEC-Q101 - confirming suitability for under-hood automotive applications where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before significant leakage |
| VBR (min/typ/max) | 15.6 / 16.4 / 17.2 V at 1 mA - ensures reliable turn-on above system operating voltage with margin |
| VC at IPPM | 23.2 V at 129 A - clamping voltage limits downstream IC stress during 3000 W surge events |
| PPPM | 3000 W (10/1000 μs) - handles automotive load-dump and ISO 7637-2 pulse 5a energy levels |
| TJ max. | +185 °C - supports placement near high-temperature components in engine control modules |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 77.5 °C/W RθJA and 18.3 °C/W RθJL |
| Polarity | Unidirectional - cathode band marked; blocks reverse current only, optimized for DC-biased signal lines |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, JESD 22-B102, and JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; enables clamping when cathode exceeds VWM + VBR |
| Cathode | Current exit terminal during forward conduction; marked by color band | Connected to higher-potential rail (e.g., VCC or signal high); defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term leakage stability at 150 °C |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS | HM3 suffix confirms compliance with JEDEC JS709E and EU RoHS Directive 2011/65/EU |
| MSL Level 1 | Rated for reflow peak of 260 °C - no floor life limitation or baking required prior to assembly |
| Low clamping ratio | VC/VBR ≈ 1.41 (23.2 V / 16.4 V) - minimizes overvoltage exposure to protected ICs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Feedback Loop |
|---|---|
Use Scenario: Protecting microcontroller ADC input pins from inductive kickback during solenoid valve switching in engine management systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor signal trace and ground, activated within nanoseconds of overvoltage event. Use Value: Limits transient voltage to ≤23.2 V, preventing latch-up or gate oxide damage in 3.3 V/5 V MCUs while maintaining signal integrity during normal 0–14 V operation. | Use Scenario: Safeguarding isolated analog feedback signals (e.g., current sense outputs) in variable-frequency drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Standoff protection element on secondary-side signal path, absorbing coupled transients before they reach precision op-amps or isolators. Use Value: Withstands repeated 3000 W surges without degradation, enabling >10-year field life in harsh industrial environments with ambient temperatures up to 125 °C. |
| Automotive Cabin Sensor Interface | Telecom Power Supply Input Stage |
Use Scenario: Shielding LIN bus transceiver inputs from ESD and battery dump events in seat position or climate sensors. IC Role / Device Role / Timing Role: First-line transient suppressor on bidirectional LIN line, leveraging unidirectional behavior referenced to local ground. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <30 V within <1 ns, preserving data integrity and avoiding false wake-up in low-power sleep modes. | Use Scenario: Front-end protection for AC/DC adapter input rectifiers subjected to lightning-induced surges on telecom central office power feeds. IC Role / Device Role / Timing Role: Secondary-level surge limiter after MOV primary stage, handling residual fast-rising transients that bypass bulk clamping. Use Value: Delivers precise 23.2 V clamping with minimal capacitance (<100 pF), avoiding interference with 50/60 Hz input regulation and reducing filter component stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14AHE3_A/H | Same VWM (14 V), lower PPPM (400 W), smaller SMA package (RθJA = 110 °C/W) | Limited to low-energy consumer electronics; not AEC-Q101 qualified | Select when cost and board space outweigh automotive reliability requirements |
| SMCJ14AHM3_A/I | Same SMC package, identical VWM/VC specs, but rated for 1500 W PPPM (not 3000 W) | Suitable for non-critical industrial controls; lacks full load-dump capability | Choose if system surge profile stays below ISO 7637-2 Pulse 5b energy level |
Compared with SMAJ14AHE3_A/H and SMCJ14AHM3_A/I, the 3KASMC14AHM3_B/I delivers 2× higher surge power handling, AEC-Q101 validation, and superior thermal robustness - making it the only option qualified for under-hood automotive deployment where 3000 W load-dump immunity and 185 °C operation are mandatory.
Availability
3KASMC14AHM3_B/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive feedback circuits, cabin sensor interfaces, and telecom power supply input stages requiring stable component supply across extended production lifecycles.
Supply support for 3KASMC14AHM3_B/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family was developed specifically for automotive and industrial transient suppression, targeting AEC-Q101 compliance, 185 °C operation, and 3000 W surge resilience in compact SMC packaging.
FAQ
What is the clamping voltage of the 3KASMC14AHM3_B/I under maximum surge current?
The 3KASMC14AHM3_B/I has a maximum clamping voltage (VC) of 23.2 V at 129 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table of Vishay's Document Number 88480 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 3KASMC14AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC14AHM3_B/I qualified for automotive applications?
Yes, the 3KASMC14AHM3_B/I is AEC-Q101 qualified, as confirmed in the Mechanical Data section of Vishay's datasheet (Document Number 88480). The HM3 suffix denotes halogen-free, RoHS-compliant construction and full AEC-Q101 validation - including temperature cycling, high-temperature reverse bias, and ESD testing - making the 3KASMC14AHM3_B/I suitable for under-hood and safety-critical automotive subsystems.
What does the "HM3" suffix mean in 3KASMC14AHM3_B/I?
The "HM3" suffix in 3KASMC14AHM3_B/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information, HM3 parts meet JEDEC JS709E halogen-free standards, pass JESD 201 Class 2 whisker testing, and are rated for MSL Level 1 reflow (260 °C peak). The "B/I" denotes revision B in 13-inch tape-and-reel packaging (3500 units per reel).
What is the thermal resistance of the 3KASMC14AHM3_B/I?
The 3KASMC14AHM3_B/I exhibits a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W and a junction-to-leads resistance (RθJL) of 18.3 °C/W, both measured under standard SMC mounting conditions. These values are listed in the Thermal Characteristics table of Document Number 88480 and directly impact power derating above 25 °C ambient - for example, PD drops to ~3.5 W at TA = 100 °C.
How does the 3KASMC14AHM3_B/I differ from the 3KASMC14AHE3_B/I?
The 3KASMC14AHM3_B/I and 3KASMC14AHE3_B/I share identical electrical specifications (VWM, VBR, VC, PPPM) and SMC package, but differ in material composition: HM3 is halogen-free and HE3 is standard RoHS-compliant. Both are AEC-Q101 qualified, but only HM3 meets JEDEC JS709E halogen-free requirements. The 3KASMC14AHM3_B/I is preferred for automotive OEMs mandating halogen-free BOMs.
3KASMC14AHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 129A
- 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 (SMC)
3KASMC14AHM3_B/I FAQ
1.How can I place an order for 3KASMC14AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14AHM3_B/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 3KASMC14AHM3_B/I reliable?
The price and inventory of 3KASMC14AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC14AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC14AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14AHM3_B/I?
3KASMC14AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14AHM3_B/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 3KASMC14AHM3_B/I?
For technical support, including 3KASMC14AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC14AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC14AHM3_B/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 3KASMC14AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC14AHM3_B/I?
All 3KASMC14AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14AHM3_B/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 3KASMC14AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC14AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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