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Vishay General Semiconductor - Diodes Division 3KASMC14AHM3_A/H
- Part No.:
- 3KASMC14AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14AHM3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,240
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Product details
Overview
3KASMC14AHM3_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 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 sensor signal lines in engine control units and motor drives.
For engineers reviewing the 3KASMC14AHM3_A/H datasheet, 3KASMC14AHM3_A/H pinout, 3KASMC14AHM3_A/H application, or 3KASMC14AHM3_A/H 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 transients per ISO 7637-2.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional architecture provides fast response time and excellent clamping ratio (VC/VBR = 23.2 V / 15.6–17.2 V ≈ 1.35–1.49), critical for protecting downstream ICs during load dump events.
Rated for TJ = –65 °C to +185 °C and qualified to AEC-Q101, the 3KASMC14AHM3_A/H supports automotive-grade reliability under thermal cycling and mechanical stress. Its MSL Level 1 rating (260 °C peak reflow) and matte tin-plated leads ensure compatibility with standard SMT assembly processes without whisker risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 14 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 15.6–17.2 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 23.2 V at IPPM = 129 A (10/1000 μs) - Actual voltage seen by protected circuit during worst-case surge. |
| PPPM | 3000 W - Peak transient energy absorption capability without failure; validated per IEC 61000-4-5. |
| TJ max. | +185 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures. |
| IFSM | 200 A (8.3 ms half-sine) - Surge current handling for short-duration inductive switching events. |
| RθJA | 77.5 °C/W - Thermal resistance from junction to ambient on standard PCB pad layout; informs heatsinking needs. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Dimensions: 7.11 mm × 6.22 mm × 2.90 mm (L × W × H). RoHS-compliant, AEC-Q101 qualified, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side reference; enables unidirectional clamping to ground. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 12 V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage (<1 μA at VWM) across temperature and life cycle. |
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Low RSURGE | Minimal incremental surge resistance preserves clamping voltage margin under high di/dt transients (e.g., ISO 7637-2 Pulse 5a). |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak, eliminating moisture sensitivity concerns pre-assembly. |
| High TJ capability | 185 °C maximum junction temperature supports placement near heat sources (e.g., power converters) without derating. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protection against load dump transients (ISO 7637-2 Pulse 5a) on 12 V supply rail feeding microcontroller and CAN transceivers. IC Role / Device Role: Unidirectional TVS clamp to ground, absorbing up to 3000 W surges while limiting rail voltage to ≤23.2 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic and analog front-ends during alternator disconnection events. |
Use Scenario: Suppressing inductive kickback from IGBT gate drivers and braking resistors on 24–48 V DC bus. IC Role / Device Role: Fast-response surge suppressor placed across bus terminals to limit voltage overshoot during switching transitions. Use Value: Maintains bus voltage within 23.2 V clamping level during 129 A transients, avoiding overvoltage shutdown of PWM controllers. |
| Telecom Power Supply Input | Automotive Sensor Signal Line |
Use Scenario: Guarding AC/DC adapter input against lightning-induced surges (IEC 61000-4-5) in outdoor base station power modules. IC Role / Device Role: Primary-level TVS on bulk input rail, coordinated with MOVs and fuses for staged protection. Use Value: Withstands 3000 W pulses without degradation, ensuring long-term reliability in harsh environmental deployments. |
Use Scenario: Protecting LIN or analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role: Low-capacitance unidirectional clamp on signal line referenced to chassis ground. Use Value: Clamps transients to 23.2 V while maintaining <1 μA leakage at 14 V, preserving signal integrity and ADC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Lower PPPM (400 W), same DO-214AC (SMA) package, VBR = 15.6–17.2 V, VC = 23.2 V | Not AEC-Q101 qualified; limited to commercial/industrial use; insufficient for automotive load dump | Select only for cost-sensitive non-automotive designs where 3000 W surge immunity is not required. |
| SMCJ14A | Same DO-214AB (SMC) package, identical VWM/VBR/VC specs, but rated for 1500 W PPPM (10/1000 μs) | Lacks AEC-Q101 qualification; lower surge margin reduces safety factor in mission-critical automotive systems | Acceptable for industrial controls with moderate surge exposure, but not for AEC-Q101–mandated automotive subsystems. |
Compared with SMAJ14A and SMCJ14A, the 3KASMC14AHM3_A/H provides triple the peak pulse power (3000 W vs. 400 W/1500 W) and formal AEC-Q101 certification - making it the only option among the three qualified for under-hood automotive deployment with full load dump immunity.
Availability
3KASMC14AHM3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive DC buses, telecom power supply inputs, and automotive sensor signal lines requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for 3KASMC14AHM3_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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC14AHM3_A/H belongs to Vishay's PAR® TVS family, engineered specifically for high-energy transient suppression in automotive power systems and demanding industrial environments where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC14AHM3_A/H under maximum surge conditions?
The 3KASMC14AHM3_A/H clamps to 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 IEC 61000-4-5 test conditions and represents the maximum voltage imposed on the protected circuit during worst-case transient events. The 3KASMC14AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC14AHM3_A/H qualified for automotive applications?
Yes, the 3KASMC14AHM3_A/H is fully AEC-Q101 qualified and rated for junction temperatures up to +185 °C. It meets automotive requirements for thermal cycling, humidity bias, and mechanical shock, and is specified for use in engine control units, body electronics, and ADAS power domains. The 3KASMC14AHM3_A/H carries the HM3 suffix confirming RoHS compliance and whisker resistance per JESD201 Class 2.
What package does the 3KASMC14AHM3_A/H use, and what are its mounting requirements?
The 3KASMC14AHM3_A/H uses the DO-214AB (SMC) surface-mount package with dimensions 7.11 mm × 6.22 mm × 2.90 mm. It requires the minimum recommended pad layout per Vishay document 89962 - including 3.20 mm minimum anode/cathode pad length and 1.52 mm minimum solder mask clearance. The 3KASMC14AHM3_A/H supports lead-free reflow up to 260 °C (MSL Level 1).
How does the 3KASMC14AHM3_A/H compare to standard SMAJ or SMCJ series TVS diodes?
The 3KASMC14AHM3_A/H delivers 3000 W peak pulse power - double that of SMCJ14A (1500 W) and nearly eight times SMAJ14A (400 W). Unlike those alternatives, the 3KASMC14AHM3_A/H is AEC-Q101 qualified and rated for 185 °C operation. Its passivated anisotropic rectifier structure also yields lower leakage (<1 μA at 14 V) and tighter VBR tolerance than legacy series.
What is the maximum reverse leakage current of the 3KASMC14AHM3_A/H at its stand-off voltage?
The 3KASMC14AHM3_A/H exhibits a maximum reverse leakage current of 1.0 μA at its 14 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperature (TJ = 150 °C), leakage remains ≤10 μA - confirmed in Vishay's electrical characteristics table. This low leakage ensures minimal power loss and signal interference in always-on automotive circuits powered by the 3KASMC14AHM3_A/H.
3KASMC14AHM3_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):
- 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/H FAQ
1.How can I place an order for 3KASMC14AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14AHM3_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 3KASMC14AHM3_A/H reliable?
The price and inventory of 3KASMC14AHM3_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 3KASMC14AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC14AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14AHM3_A/H?
3KASMC14AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14AHM3_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 3KASMC14AHM3_A/H?
For technical support, including 3KASMC14AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC14AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC14AHM3_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 3KASMC14AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC14AHM3_A/H?
All 3KASMC14AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14AHM3_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 3KASMC14AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC14AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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