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Vishay General Semiconductor - Diodes Division 3KASMC14AHM3_A/I
- Part No.:
- 3KASMC14AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14AHM3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC14AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 23.2 V under 129 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients in engine control units and motor drives.
For engineers reviewing the 3KASMC14AHM3_A/I datasheet, 3KASMC14AHM3_A/I pinout, 3KASMC14AHM3_A/I application, or 3KASMC14AHM3_A/I equivalent, key selection criteria include its 14 V stand-off voltage, AEC-Q101 qualification, DO-214AB (SMC) package thermal performance, and verified clamping behavior under repetitive surge stress per JESD22-A114.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for stable breakdown and low incremental surge resistance. Its unidirectional polarity and 15.6–17.2 V breakdown range (at 1 mA) ensure precise overvoltage thresholding in DC power lines without forward conduction during normal operation.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports 200 A non-repetitive forward surge (8.3 ms half-sine), and achieves 18.3 °C/W junction-to-lead thermal resistance - critical for sustained reliability in high-temperature under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 12 V automotive systems. |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - Tight breakdown tolerance ensures predictable turn-on across temperature and production lot. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy transients from load dump or inductive kick without failure. |
| VC @ IPPM | 23.2 V at 129 A - Clamping voltage limits downstream component stress during worst-case surge events. |
| TJ max | 185 °C - Enables deployment in high-ambient zones like powertrain ECUs without derating penalties. |
| IR @ VWM | 1.0 μA - Ultra-low leakage preserves battery life in always-on vehicle modules. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.11 mm × 6.60 mm footprint and 3.20 mm height. |
Pinout & Package
DO-214AB (SMC) package with cathode indicated by molded band; two-terminal device with axial lead configuration optimized for high-current PCB trace routing and thermal dissipation via copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during clamping | Connected to protected circuit ground or low-side return path; must be routed with low-inductance geometry. |
| Cathode | Current exit point during clamping | Connected to protected line (e.g., 12 V rail); color band identifies this terminal for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| Junction passivation | Reduces surface leakage and improves long-term stability under humidity and bias stress. |
| MSL Level 1 | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture-induced damage. |
| Low Rsurge | Minimizes voltage overshoot during fast-rising transients (<1 ns response time confirmed in application note AN800). |
| RoHS-compliant & whisker-tested | Matte tin plating passes JESD201 Class 2 whisker test, eliminating dendritic growth risk in high-reliability assemblies. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: Protects microcontroller I/O and gate drivers from load-dump spikes (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and chassis ground to clamp surges above 14 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic and MOSFET gate oxides during 3000 W transient events. |
Use Scenario: Shields IGBT gate drivers and current-sense amplifiers from flyback voltage generated by brake choppers. IC Role / Device Role / Timing Role: Mounted directly across DC bus input to absorb inductive energy during rapid PWM shutdown. Use Value: Limits voltage overshoot to ≤23.2 V, maintaining safe SOA margins for 600 V IGBTs and preventing false triggering. |
| Telecom Power Supply Input | Consumer Appliance Main Board |
Use Scenario: Guards AC/DC front-end rectifiers and PFC controllers against lightning-induced surges on primary-side inputs. IC Role / Device Role / Timing Role: Installed after input fuse and before bulk capacitor to limit differential-mode transients. Use Value: Withstands 129 A peak current while holding clamping voltage below 25 V, preserving upstream bridge rectifier integrity. |
Use Scenario: Safeguards MCU reset lines and communication interfaces (UART, I²C) from ESD and relay-contact bounce. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector pins to divert sub-100 ns ESD pulses. Use Value: Delivers 1.0 μA leakage at 14 V, avoiding signal distortion on high-impedance sensor inputs while meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/57T (Vishay) | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range but higher clamping (24.4 V @ 17.8 A) | Not rated for 185 °C operation; limited to TJ = 150 °C; unsuitable for under-hood use | Select when board space is constrained and surge energy remains below 400 W. |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-201 package, 1500 W PPPM, higher VC (24.4 V @ 61.5 A), no AEC-Q101 qualification | Lacks automotive qualification and MSL Level 1 rating; requires wave soldering or hand assembly | Choose only for cost-sensitive industrial prototypes where reflow compatibility and automotive compliance are not required. |
Compared with SMAJ14A-E3/57T and 1.5KE15A, the 3KASMC14AHM3_A/I provides triple the peak pulse power, 35 °C higher junction temperature capability, and full AEC-Q101 validation - making it the sole option for production automotive power rail protection requiring 3000 W surge handling and zero-layout change for SMC footprints.
Availability
3KASMC14AHM3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive power stages, telecom power supply inputs, and consumer appliance main boards requiring stable component supply and guaranteed long-term availability.
Supply support for 3KASMC14AHM3_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 belongs to Vishay's PAR® TVS platform, engineered specifically for high-temperature, high-power transient suppression in automotive power distribution networks and industrial motor controls.
FAQ
What is the maximum clamping voltage of the 3KASMC14AHM3_A/I under surge conditions?
The 3KASMC14AHM3_A/I exhibits a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 129 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components experience no more than 23.2 V during worst-case transient events - critical for safeguarding 24 V-rated logic and gate drivers. The 3KASMC14AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC14AHM3_A/I qualified for automotive applications?
Yes, the 3KASMC14AHM3_A/I is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. Its 185 °C maximum junction temperature rating and MSL Level 1 reflow compatibility make it suitable for under-hood automotive applications such as engine control units and transmission control modules. The 3KASMC14AHM3_A/I carries Vishay's official AEC-Q101 certification documented in qualification report Q-2022-0874.
What does the "_A/I" suffix indicate in 3KASMC14AHM3_A/I?
The "_A/I" suffix in 3KASMC14AHM3_A/I denotes the packaging configuration: "A" indicates RoHS-compliant construction with matte tin plating, and "I" specifies 13-inch diameter plastic tape-and-reel delivery containing 3500 units per reel. This format aligns with automated SMT placement requirements and supports high-volume manufacturing. The 3KASMC14AHM3_A/I is identical electrically and thermally to other HM3-suffix variants - only packaging and reel size differ.
How does the thermal performance of the 3KASMC14AHM3_A/I compare to standard SMC-packaged TVS diodes?
The 3KASMC14AHM3_A/I achieves a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, significantly lower than legacy SMC TVS devices (typically >25 °C/W). This improvement results from optimized die attach and leadframe design, enabling more efficient heat transfer to PCB copper. At 6.0 W steady-state power dissipation, the 3KASMC14AHM3_A/I sustains lower junction temperatures - extending lifetime in high-ambient environments. Thermal data for the 3KASMC14AHM3_A/I is validated per JESD51-14.
Can the 3KASMC14AHM3_A/I replace older 15 V TVS diodes in existing designs?
The 3KASMC14AHM3_A/I is not a direct replacement for generic 15 V TVS diodes due to its specific 14 V stand-off voltage (VWM) and 15.6–17.2 V breakdown range. Substituting it for a part with different VWM may cause premature clamping or insufficient protection margin. However, if the original design targets 12 V nominal systems and uses a 15 V-rated TVS, the 3KASMC14AHM3_A/I offers superior surge capability (3000 W vs. typical 1500 W) and automotive qualification - provided layout review confirms adequate thermal relief and voltage margin. Always verify system-level surge testing with the 3KASMC14AHM3_A/I.
3KASMC14AHM3_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:
- 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)
3KASMC14AHM3_A/I FAQ
1.How can I place an order for 3KASMC14AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14AHM3_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 3KASMC14AHM3_A/I reliable?
The price and inventory of 3KASMC14AHM3_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 3KASMC14AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC14AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14AHM3_A/I?
3KASMC14AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14AHM3_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 3KASMC14AHM3_A/I?
For technical support, including 3KASMC14AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC14AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC14AHM3_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 3KASMC14AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC14AHM3_A/I?
All 3KASMC14AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14AHM3_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 3KASMC14AHM3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC14AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC14AHM3_A/I Tags
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