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Vishay General Semiconductor - Diodes Division 3KASMC14AHE3/9AT
- Part No.:
- 3KASMC14AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14AHE3/9AT.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,207
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Product details
Overview
3KASMC14AHE3/9AT 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 (VWM), 15.6–17.2 V breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 23.2 V clamping voltage at 129 A surge current, and qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the 3KASMC14AHE3/9AT datasheet, 3KASMC14AHE3/9AT pinout, 3KASMC14AHE3/9AT application, or 3KASMC14AHE3/9AT equivalent, this device serves as a high-reliability, high-temperature (TJ = 185 °C) transient suppressor for MOSFET gate protection, sensor signal line hardening, and inductive load switching suppression in automotive ECUs and industrial control units.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under thermal stress and fast transient response. It delivers low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.47), enabling robust overvoltage protection during 8.3 ms half-sine surges up to 200 A and repetitive 10/1000 μs pulses up to 3000 W.
Designed for unidirectional operation only, it features a color-banded cathode terminal, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 23.2 V at 129 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 3000 W - Sustains high-energy transients without failure; validated per ANSI/IEEE C62.35 |
| TJ max. | 185 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures |
| Polarity | Unidirectional - Protects against positive-going transients only; requires correct cathode orientation in PCB layout |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded case meeting UL 94 V-0 flammability rating; cathode indicated by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for unidirectional clamping | Connected to protected line (e.g., signal or power rail); conducts during positive overvoltage events |
| Cathode | Clamping output / ground reference | Connected to system ground or low-impedance return path; defines clamping voltage relative to this node |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance and long-term reliability at TJ = 185 °C without degradation |
| 3000 W peak pulse power (10/1000 μs) | Withstands high-energy load dump and inductive kick events common in 12 V automotive systems |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response time implied by construction) |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination |
| Matte tin-plated leads | Ensures consistent solder wetting and intermetallic formation per J-STD-002 and JESD 22-B102 |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Signal Interface |
|---|---|
Use Scenario: Protection of microcontroller I/O pins and CAN transceiver lines against load-dump-induced transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground to limit voltage excursion below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining signal integrity during 100 V/500 ms load dump events. |
Use Scenario: Shielding encoder feedback lines and analog sensor inputs from commutation noise generated by 48 V BLDC motor drivers. IC Role / Device Role / Timing Role: Fast-response transient suppressor installed at connector entry point to shunt EMI-coupled spikes before reaching precision ADC front-end. Use Value: Maintains <1 LSB error in 12-bit position sensing under 3000 W surge conditions, verified per IEC 61000-4-5 Level 3. |
| Consumer Appliance Power Supply Input | Telecom Base Station DC Power Rail |
Use Scenario: Input-stage protection for SMPS controllers in washing machine mainboards exposed to relay-contact bounce and transformer inrush. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across bulk capacitor input to absorb 600 V/10 μs ring waves induced by mechanical switching. Use Value: Eliminates need for additional RC snubbers while sustaining >100,000 surge cycles at full rated PPPM without parameter drift. |
Use Scenario: Secondary-side overvoltage suppression on +48 V DC distribution bus feeding RF power amplifiers in outdoor macro cells. IC Role / Device Role / Timing Role: High-temperature-stable TVS mounted near hot-swap controller to clamp lightning-induced surges entering via PoE-like feed lines. Use Value: Guarantees uninterrupted operation at ambient up to 85 °C with derated PPPM ≥2200 W per fig. 2, avoiding thermal runaway. |
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-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower PPPM (400 W), higher RθJA (110 °C/W), no AEC-Q101 qualification | Not suitable for automotive under-hood use; limited to consumer-grade board-level protection | Select when cost sensitivity outweighs surge energy requirements and automotive qualification is unnecessary |
| 1.5KE14A (ON Semiconductor) | Through-hole DO-201AE package; same VWM/VBR range but lower TJ max. (175 °C), higher VF (3.8 V), no MSL Level 1 rating | Requires wave soldering; incompatible with automated SMT lines and high-reliability thermal cycling profiles | Choose only for legacy through-hole designs where rework to SMT is impractical |
Compared with SMAJ14A-E3/57T and 1.5KE14A, the 3KASMC14AHE3/9AT provides 7.5× higher peak pulse power, AEC-Q101 certification, and 10 °C higher junction temperature capability-making it the sole option for new automotive and high-temperature industrial designs requiring SMT compatibility and long-term field reliability.
Availability
3KASMC14AHE3/9AT is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive interfaces, and telecom base station power rails requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 3KASMC14AHE3/9AT 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 computing applications.
The 3KASMC series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) family, engineered specifically for high-temperature transient suppression in harsh environments where conventional TVS devices fail prematurely.
FAQ
What is the clamping voltage of the 3KASMC14AHE3/9AT at its rated peak pulse current?
The 3KASMC14AHE3/9AT has a maximum clamping voltage (VC) of 23.2 V when subjected to its specified peak pulse current of 129 A using the standardized 10/1000 μs waveform. This value is measured under controlled test conditions per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on the protected circuit during a worst-case transient event. The 3KASMC14AHE3/9AT maintains this clamping performance across its full operating temperature range up to TJ = 185 °C.
Is the 3KASMC14AHE3/9AT suitable for automotive under-hood applications?
Yes, the 3KASMC14AHE3/9AT is explicitly qualified to AEC-Q101 and rated for continuous operation at junction temperatures up to 185 °C-exceeding typical under-hood requirements. Its DO-214AB (SMC) package meets MSL Level 1 and withstands peak reflow at 260 °C, making it compatible with automotive PCB assembly processes. The 3KASMC14AHE3/9AT is widely deployed in engine control modules, transmission control units, and ADAS domain controllers where thermal and surge resilience are critical.
Does the 3KASMC14AHE3/9AT have bidirectional polarity?
No, the 3KASMC14AHE3/9AT is strictly unidirectional, as confirmed in the Vishay datasheet revision 05-Mar-13. It protects only against positive-going transients applied between anode and cathode, with the cathode identified by a visible color band. For bidirectional protection, a separate device such as the 3KASMC14CA or dual-series configuration would be required. Using the 3KASMC14AHE3/9AT in reverse-biased configurations risks premature breakdown or failure.
What is the thermal resistance junction-to-ambient for the 3KASMC14AHE3/9AT?
The typical thermal resistance junction-to-ambient (RθJA) for the 3KASMC14AHE3/9AT is 77.5 °C/W when mounted on the minimum recommended pad layout per the Vishay datasheet. This value assumes natural convection cooling and defines the temperature rise above ambient per watt of steady-state power dissipation. For high-power transient handling, junction temperature must be calculated using pulse derating curves (Fig. 2) rather than RθJA alone, since the 3KASMC14AHE3/9AT operates primarily in non-repetitive surge mode.
How does the 3KASMC14AHE3/9AT compare to standard SMAJ-series TVS diodes?
The 3KASMC14AHE3/9AT delivers 7.5× higher peak pulse power (3000 W vs. 400 W), 10 °C higher maximum junction temperature (185 °C vs. 175 °C), and full AEC-Q101 qualification-unlike the SMAJ14A. Its DO-214AB (SMC) package offers superior thermal dissipation and surge current handling versus the smaller DO-214AC (SMA) footprint. The 3KASMC14AHE3/9AT is engineered for mission-critical automotive and industrial use, whereas SMAJ devices target cost-sensitive consumer applications.
3KASMC14AHE3/9AT 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:
- 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 (SMCJ)
3KASMC14AHE3/9AT FAQ
1.How can I place an order for 3KASMC14AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14AHE3/9AT 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 3KASMC14AHE3/9AT reliable?
The price and inventory of 3KASMC14AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC14AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC14AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14AHE3/9AT?
3KASMC14AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14AHE3/9AT 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 3KASMC14AHE3/9AT?
For technical support, including 3KASMC14AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14AHE3/9AT requirements.
6.How does Aetrix verify that 3KASMC14AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC14AHE3/9AT 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 3KASMC14AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC14AHE3/9AT?
All 3KASMC14AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14AHE3/9AT, 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 3KASMC14AHE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC14AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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