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Vishay General Semiconductor - Diodes Division SMC3K14CAHM3_A/H
- Part No.:
- SMC3K14CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K14CAHM3_A/H.pdf
- Description:
- 3KW, 14V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
SMC3K14CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) designed for robust overvoltage protection in automotive and industrial power rails and signal lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown range (VBR), 23.2 V clamping voltage at 1000 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - enabling use in 12 V battery system load dump and ISO 7637-2 Pulse 1/2a/3a/3b protection circuits.
For engineers reviewing the SMC3K14CAHM3_A datasheet, SMC3K14CAHM3_A pinout, SMC3K14CAHM3_A application, or SMC3K14CAHM3_A equivalent, key selection criteria include clamping performance under 1000 A surge, bidirectional ESD immunity up to 30 kV (IEC 61000-4-2), thermal resistance (RthJA = 90 °C/W), and compatibility with SMC (DO-214AB) PCB footprints in space-constrained automotive ECUs and sensor interfaces.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, activating when transient voltage exceeds its reverse standoff level (14 V) and clamping to ≤23.2 V at 1000 A (10/1000 μs). Its low incremental surge resistance ensures minimal voltage overshoot during fast transients like inductive switch-off spikes.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing, UL 497B safety recognition (E136766), and IEC 61000-4-2 ±30 kV contact/air discharge. The SMC (DO-214AB) package supports MSL Level 1 handling and 260 °C reflow per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 12 V automotive rail protection. |
| VBR (min/max) | 15.6 V / 17.2 V - Breakdown occurs within this range at 1 mA test current; defines turn-on consistency across temperature and unit variation. |
| VC @ IPPM (10/1000 μs) | 23.2 V at 1000 A - Clamped voltage during standardized surge; determines maximum stress on downstream ICs like MCUs or CAN transceivers. |
| PPPM | 3000 W - Peak pulse power handling capability with 10/1000 μs waveform; enables survival of ISO 7637-2 Pulse 1 (−150 V, 2 ms) events. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact/air) - Confirmed immunity to human-body-model discharges; protects exposed connectors and sensor inputs. |
| TJ max. | +175 °C - Maximum junction temperature rating; supports operation in under-hood environments and high-power density layouts. |
| RthJA | 90 °C/W - Thermal resistance from junction to ambient on standard FR4; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Transient current sink (bidirectional) | Acts as common node for both polarities; connects to protected line (e.g., CAN_H or power rail) with low-inductance path to ground. |
| Anode | Transient current return (bidirectional) | Completes shunt path to ground plane; requires short, wide trace to minimize clamping voltage rise during surge. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or dual-polarity lines (e.g., CAN bus, LIN, sensor differential pairs) without polarity sensitivity. |
| 30 kW surge rating (8/20 μs) | Withstands high-energy lightning-induced surges per IEC 61000-4-5; clamps to 30.0 V at 1000 A (8/20 μs). |
| AEC-Q101 qualification | Validated for automotive electronics including engine control, body modules, and ADAS sensors per stress test requirements. |
| UL 497B recognition (E136766) | Meets safety standards for telecom and industrial interface protection; enables regulatory compliance without additional certification. |
| Halogen-free & RoHS-compliant | HM3_A suffix confirms material compliance with environmental directives and JEDEC whisker resistance (Class 2). |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump (ISO 16750-2 Pulse b) and alternator switching spikes. IC Role / Device Role / Timing Role: Shunt TVS device placed between VCC and GND, activated within nanoseconds to clamp voltage below MCU absolute maximum rating. Use Value: Limits peak rail voltage to ≤23.2 V during 1000 A transients, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. |
Use Scenario: Safeguarding high-speed CAN FD physical layer transceivers (e.g., TCAN1042) from ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional clamping element across CAN_H/CAN_L differential pair, referenced to ground via low-inductance layout. Use Value: Maintains signal integrity by clamping common-mode surges to ≤30.0 V (8/20 μs), preserving bit error rate under ISO 7637-2 Pulse 3b (150 ns, 150 V). |
| Industrial Sensor Interface Protection | Telecom Line Surge Guarding |
|
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop drivers) in factory automation sensors from field-induced transients. IC Role / Device Role / Timing Role: Low-capacitance (typ. 129 pF at 0 V) shunt protector placed at connector entry point before signal conditioning circuitry. Use Value: Delivers <2 μA leakage at 14 V, minimizing offset error in precision current sources while suppressing ±30 kV ESD per IEC 61000-4-2. |
Use Scenario: Front-end protection for Ethernet PHYs or RS-485 transceivers in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge arrestor on data line pairs, coordinated with secondary GDT or MOV stages for multi-level protection. Use Value: Handles 30 kW (8/20 μs) energy bursts while maintaining clamping voltage below transceiver breakdown thresholds, extending system MTBF. |
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-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), unidirectional only. | Limited to DC-biased rails; insufficient for ISO 7637-2 Pulse 1 or automotive load dump. | Select only for low-energy consumer electronics where 3000 W surge capacity is unnecessary. |
| 1.5KE15CA (ON Semiconductor) | Through-hole DO-201 package, same VWM/VBR range, but lacks AEC-Q101 and UL 497B certification. | Not qualified for automotive production; suitable only for industrial prototypes or non-safety-critical systems. | Choose only if board-level rework tolerance and manual assembly are acceptable trade-offs for cost reduction. |
Compared with SMC3K14CAHM3_A, SMAJ14A-E3/5A offers smaller size but fails to meet automotive surge energy requirements, while 1.5KE15CA provides equivalent electrical specs in through-hole form but omits critical automotive and safety certifications needed for OEM deployment.
Availability
SMC3K14CAHM3_A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, CAN/LIN bus interfaces, and telecom line cards requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMC3K14CAHM3_A 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh automotive environments - emphasizing low clamping voltage, fast response, and AEC-Q101 validation.
FAQ
What is the clamping voltage of SMC3K14CAHM3_A under a 1000 A, 10/1000 μs surge?
The SMC3K14CAHM3_A clamps to a maximum of 23.2 V when subjected to a 1000 A, 10/1000 μs transient waveform. This value is specified in the Electrical Characteristics table and represents the upper limit of voltage seen by downstream circuitry during such an event. Designers must ensure that this clamped voltage remains below the absolute maximum ratings of protected ICs. The SMC3K14CAHM3_A achieves this with low dynamic impedance and optimized silicon geometry.
Is SMC3K14CAHM3_A certified for automotive applications?
Yes, SMC3K14CAHM3_A is AEC-Q101 qualified, meaning it has passed rigorous stress tests for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life required for automotive electronic components. It is also UL recognized (file E136766) and meets ISO 7637-2 and ISO 16750-2 immunity standards - making it suitable for production use in engine control, body electronics, and ADAS subsystems.
What package does SMC3K14CAHM3_A use, and what are its mounting requirements?
SMC3K14CAHM3_A uses the SMC (DO-214AB) surface-mount package, with dimensions of 7.11 mm × 6.22 mm × 2.62 mm. It requires a standard SMC footprint per Vishay's recommended pad layout, supports MSL Level 1 handling, and is compatible with lead-free reflow profiles peaking at 260 °C. Proper thermal relief and short, low-inductance ground paths are essential to maintain clamping performance.
How does SMC3K14CAHM3_A perform under ESD stress per IEC 61000-4-2?
SMC3K14CAHM3_A delivers ±30 kV ESD protection per IEC 61000-4-2 in both contact and air discharge modes - verified per the manufacturer's test report. This performance stems from its low junction capacitance (129 pF at 0 V) and fast avalanche response (<1 ns), allowing it to suppress fast-rising ESD events before sensitive inputs are damaged. The SMC3K14CAHM3_A is routinely deployed at connector interfaces in automotive infotainment and sensor modules.
What is the maximum operating junction temperature for SMC3K14CAHM3_A?
The maximum operating junction temperature for SMC3K14CAHM3_A is +175 °C, as specified in the Primary Characteristics table. This rating enables reliable operation in under-hood automotive environments and high-temperature industrial enclosures. Derating curves in the datasheet show that peak pulse power must be reduced above 25 °C ambient, with RthJA = 90 °C/W guiding thermal design on standard FR4 PCBs.
SMC3K14CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K14CAHM3_A/H FAQ
1.How can I place an order for SMC3K14CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K14CAHM3_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 SMC3K14CAHM3_A/H reliable?
The price and inventory of SMC3K14CAHM3_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 SMC3K14CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMC3K14CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K14CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K14CAHM3_A/H?
SMC3K14CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K14CAHM3_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 SMC3K14CAHM3_A/H?
For technical support, including SMC3K14CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K14CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K14CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K14CAHM3_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 SMC3K14CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMC3K14CAHM3_A/H?
All SMC3K14CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K14CAHM3_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 SMC3K14CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMC3K14CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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