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Vishay General Semiconductor - Diodes Division 3KASMC14HE3_A/I
- Part No.:
- 3KASMC14HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14HE3_A/I.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,863
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Product details
Overview
3KASMC14HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) 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), 129 A peak surge current, and 23.2 V clamping voltage - designed for automotive-grade overvoltage protection of power rails and signal lines in engine control units and ADAS sensor interfaces.
For engineers reviewing the 3KASMC14HE3_A/I datasheet, 3KASMC14HE3_A/I pinout, 3KASMC14HE3_A/I application, or 3KASMC14HE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 185 °C maximum junction temperature, MSL Level 1 rating, 1.0 μA reverse leakage at 14 V, and unidirectional polarity with cathode band marking - critical for high-reliability automotive and industrial power rail protection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping performance under fast transient events. Its 10/1000 μs waveform response delivers stable 23.2 V clamping at 129 A while maintaining <1 ns response time and thermal resistance of 77.5 °C/W (junction-to-ambient).
Designed for operation across –65 °C to +185 °C, it supports high-temperature environments without derating loss up to 125 °C ambient, and meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements - confirming suitability for under-hood automotive electronics and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail protection threshold. |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 23.2 V at 129 A - Clamping voltage under full 3000 W surge; limits downstream IC stress to safe levels during ISO 7637-2 pulses. |
| PPPM | 3000 W (10/1000 μs) - Peak pulse power handling capacity validated per ANSI/IEEE C62.35; supports severe load-dump immunity. |
| TJ max. | +185 °C - Enables placement near heat sources (e.g., power converters) without thermal shutdown or degradation. |
| Polarity | Unidirectional - Protects only against positive transients on anode-cathode biased rail; requires correct orientation in circuit. |
| MSL Level | Level 1 (JEDEC J-STD-020) - Supports standard SMT reflow without moisture-induced popcorning; peak temp ≤ 260 °C. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Dimensions: 6.22 mm × 5.59 mm × 2.41 mm (L × W × H), compliant with IPC-7351B footprint recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path during clamping | Connected to protected line (e.g., 12 V rail); conducts surge current to ground when VC exceeded. |
| Cathode | Reference terminal (marked with band) | Connected to system ground or lower-potential node; defines unidirectional conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test conditions including HTGB, TCT, and ESD-HBM ≥ 8 kV - required for ECUs and body controllers. |
| Junction passivation | Optimized die passivation reduces leakage drift and improves long-term reliability under thermal cycling and humidity exposure. |
| Low Rsurge | Minimal incremental surge resistance ensures stable clamping voltage across wide current range - prevents overshoot during fast transients. |
| High TJ capability | 185 °C max junction temperature enables operation in under-hood environments where ambient exceeds 125 °C. |
| UL 94 V-0 molding | Flame-retardant epoxy compound prevents propagation of fire in fault conditions - mandated for automotive interior and power modules. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Rail |
|---|---|
Use Scenario: Protection of 12 V supply input against ISO 7637-2 load dump pulses (up to 60 V, 400 ms) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping device placed directly at connector entry point before DC/DC converter input. Use Value: Limits rail voltage to ≤23.2 V during 129 A transients, preventing damage to buck controller ICs and gate drivers. |
Use Scenario: Guarding IGBT gate driver supply against inductive switching spikes in 3-phase inverters. IC Role / Device Role / Timing Role: Fast-response shunt clamp on isolated 15 V gate bias rail, suppressing >100 ns dv/dt spikes. Use Value: Maintains gate voltage integrity below 23.2 V, avoiding false turn-on and shoot-through failure in power stage. |
| ADAS Camera Sensor Interface | Telecom Power Shelf Input |
Use Scenario: Safeguarding FPD-Link III serial interface lines (3.3 V/5 V) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Point-of-entry TVS on coaxial or twisted-pair differential pair, placed before serializer IC. Use Value: Sub-1 ns response and 1.0 μA leakage at 14 V preserve signal integrity while meeting IEC 61000-4-2 ±8 kV contact discharge. |
Use Scenario: Secondary-stage transient suppression on -48 V telecom rectifier output feeding backplane distribution. IC Role / Device Role / Timing Role: Unidirectional clamp on negative rail, referenced to chassis ground with cathode tied to rail. Use Value: Withstands repeated 3000 W surges per GR-1089-CORE, extending service life of DC-DC modules in central offices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Same DO-214AC (SMA) package; lower PPPM (400 W), higher VC (23.2 V → 25.8 V), no AEC-Q101 qualification | Limited to commercial/industrial use; unsuitable for automotive due to missing qualification and lower surge margin | Select only for cost-sensitive non-automotive designs where 400 W surge capacity suffices. |
| 1.5KE14A | Through-hole DO-201AE package; same VWM/VBR, but higher VC (25.8 V), larger footprint, no MSL rating | Requires wave soldering; incompatible with automated SMT lines and high-density PCB layouts | Use only for legacy through-hole systems or prototyping where reflow compatibility is not required. |
Compared with SMAJ14A and 1.5KE14A, the 3KASMC14HE3_A/I provides 7.5× higher peak pulse power, AEC-Q101 validation, MSL Level 1 compliance, and optimized thermal resistance - making it the sole choice for production automotive SMT designs requiring robust, drop-in-ready TVS protection.
Availability
3KASMC14HE3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and ADAS camera module production requiring stable component supply, long-term lifecycle assurance, and traceable RoHS-compliant sourcing.
Supply support for 3KASMC14HE3_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 with emphasis on automotive, industrial, and power applications.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for AEC-Q101-compliant automotive power rail and signal line protection under extreme thermal and surge conditions.
FAQ
What is the maximum junction temperature rating for the 3KASMC14HE3_A/I?
The 3KASMC14HE3_A/I has a maximum junction temperature (TJ) of +185 °C, verified per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments and near high-power components where ambient temperatures exceed 125 °C. The 3KASMC14HE3_A/I maintains specified clamping performance up to this limit without parameter drift or accelerated aging.
Is the 3KASMC14HE3_A/I unidirectional or bidirectional?
The 3KASMC14HE3_A/I is strictly unidirectional, as confirmed in the Vishay datasheet (Document #89962, page 1). It protects only against positive-going transients on the anode-to-cathode path and must be oriented with the cathode band toward ground. Bidirectional variants (e.g., 3KASMC14CA) are separate part numbers and not interchangeable with the 3KASMC14HE3_A/I.
Does the 3KASMC14HE3_A/I meet AEC-Q101 qualification?
Yes, the 3KASMC14HE3_A/I is explicitly AEC-Q101 qualified, as stated in the "FEATURES" section and "Notes" of the Vishay datasheet (Document #89962). This includes full stress testing for high-temperature reverse bias, temperature cycling, and ESD-HBM - validating its suitability for automotive powertrain and safety-critical systems.
What is the clamping voltage of the 3KASMC14HE3_A/I at its rated peak pulse current?
The 3KASMC14HE3_A/I clamps to 23.2 V at its rated peak pulse current of 129 A (10/1000 μs waveform), per the Electrical Characteristics table on page 2 of the Vishay datasheet. This value is measured under standardized conditions and defines the maximum voltage seen by downstream circuitry during worst-case surge events.
What packaging format does the 3KASMC14HE3_A/I ship in?
The 3KASMC14HE3_A/I ships in 13-inch plastic tape and reel format (package code "I"), with a base quantity of 3500 units per reel. This format is compatible with high-speed pick-and-place equipment and supports automated SMT assembly lines without manual handling or re-taping.
3KASMC14HE3_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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 116A
- 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)
3KASMC14HE3_A/I FAQ
1.How can I place an order for 3KASMC14HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14HE3_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 3KASMC14HE3_A/I reliable?
The price and inventory of 3KASMC14HE3_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 3KASMC14HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC14HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14HE3_A/I?
3KASMC14HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14HE3_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 3KASMC14HE3_A/I?
For technical support, including 3KASMC14HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC14HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC14HE3_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 3KASMC14HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC14HE3_A/I?
All 3KASMC14HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14HE3_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 3KASMC14HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC14HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC14HE3_A/I Tags
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