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Vishay General Semiconductor - Diodes Division SMCJ14AHE3_A/H
- Part No.:
- SMCJ14AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14AHE3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ14AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown voltage (VBR at 1 mA), 23.2 V clamping voltage (VC) at 64.7 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCJ14AHE3_A/H datasheet, SMCJ14AHE3_A/H pinout, SMCJ14AHE3_A/H application, or SMCJ14AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ns), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads per terminal.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to divert transient energy away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at 14 V), while the SMC package supports high thermal dissipation (RθJA = 75 °C/W) and meets MSL Level 1 reflow requirements (peak 260 °C).
The device is rated for continuous operation from –55 °C to +150 °C junction temperature and handles non-repetitive 8.3 ms half-sine surge currents up to 200 A (IFSM). Its clamping performance is specified under standardized 10/1000 µs waveform conditions, with derating applied above 25 °C ambient per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before significant leakage; defines upper limit for DC rail protection without false triggering |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 23.2 V at 64.7 A - clamped voltage during 1500 W transient; determines maximum stress imposed on downstream components |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; quantifies surge energy absorption capability |
| IPPM | 64.7 A - corresponding peak pulse current at VC; used to size PCB trace width and verify layout survivability |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments and high-power industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in unidirectional configuration | Connected to protected line (e.g., VIN); reverse-biased during normal operation; conducts during overvoltage events |
| Anode (non-banded end) | Ground reference or return path | Typically tied to system ground or low-impedance return plane; completes clamping path during transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime |
| 1500 W peak pulse power | Provides robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges in automotive ECUs |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control, ADAS sensors, and body electronics |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing without baking, reducing manufacturing overhead |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and GND, activated within <1 ns to clamp spikes to ≤23.2 V. Use Value: Prevents MCU brownout or latch-up during 120 V/50 ms load dump events while maintaining system uptime and ASIL-B compliance. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation PLCs from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (with series resistor) limiting voltage excursions on signal lines to safe levels. Use Value: Maintains signal integrity and prevents ADC saturation or op-amp damage during 8 kV contact ESD events per IEC 61000-4-2. |
| DC-DC Converter Input Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding input stage of buck converters in telecom power supplies exposed to lightning-induced surges on AC/DC front-ends. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input capacitor and controller IC, absorbing 1500 W transients. Use Value: Eliminates need for secondary crowbar circuits and extends converter MTBF by preventing MOSFET gate oxide rupture. |
Use Scenario: Protecting high-side and low-side gate driver ICs in BLDC motor inverters from shoot-through-inducing voltage spikes during PWM switching. IC Role / Device Role / Timing Role: Localized TVS on gate drive traces near driver outputs, clamping Miller-induced overshoot to <25 V. Use Value: Reduces false triggering of desaturation detection and avoids gate driver latch-up during 600 V bus switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not load dump or IEC 61000-4-5 | Select when board space is constrained and surge threat level is limited to human-body-model ESD. |
| SMCJ14CAHE3_A/H | Bidirectional variant; identical VWM, VBR, VC, and PPPM but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, CAN bus) | Choose for bidirectional protection needs; not interchangeable without circuit redesign due to polarity behavior. |
Compared with SMAJ14AHE3/A and SMCJ14CAHE3_A/H, the SMCJ14AHE3_A/H delivers superior surge handling for automotive and industrial DC rails, offers AEC-Q101 assurance not found in SMAJ series, and provides unidirectional clamping optimized for grounded power systems - making it the preferred choice where 1500 W capability and automotive qualification are mandatory.
Availability
SMCJ14AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom DC-DC converter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ14AHE3_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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and communications infrastructure - prioritizing AEC-Q101 qualification, low clamping ratio, and robust surge endurance.
FAQ
What is the clamping voltage of SMCJ14AHE3_A/H at its rated peak pulse current?
The SMCJ14AHE3_A/H has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 64.7 A using a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ14AHE3_A/H maintains this clamping performance across its full operating temperature range, ensuring consistent protection behavior in automotive and industrial environments.
Is SMCJ14AHE3_A/H qualified for automotive applications?
Yes, the SMCJ14AHE3_A/H carries AEC-Q101 qualification, confirming its reliability for automotive use cases including engine control modules, body electronics, and ADAS sensor interfaces. This qualification covers stress tests such as high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and electrostatic discharge. The HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction, distinguishing it from commercial-grade variants like E3 or M3.
How does the SMCJ14AHE3_A/H differ from the bidirectional SMCJ14CAHE3_A/H?
The SMCJ14AHE3_A/H is unidirectional, meaning it conducts only when reverse-biased beyond its breakdown voltage and blocks forward current - ideal for DC power rail protection. In contrast, the SMCJ14CAHE3_A/H is bidirectional, providing symmetrical clamping in both polarities, required for AC signals or floating lines like CAN or RS-485. While both share identical VWM (14 V), VBR, VC, and PPPM (1500 W), their polarity behavior and marking (band vs. no band) prevent direct substitution without circuit review.
What is the thermal resistance of SMCJ14AHE3_A/H, and how does it affect PCB layout?
The SMCJ14AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes standard FR-4 PCB with 1 oz copper. To maintain safe junction temperatures under repeated surge conditions, designers must ensure adequate copper area and avoid thermal bottlenecks - undersized pads or thin traces increase effective RθJA, risking thermal runaway during high-duty-cycle transients. The SMCJ14AHE3_A/H's RθJL of 15 °C/W further emphasizes the importance of low-impedance thermal paths to internal leads.
Can SMCJ14AHE3_A/H be used in place of SMAJ14AHE3/A in existing designs?
No - the SMCJ14AHE3_A/H cannot be directly substituted for SMAJ14AHE3/A without layout and performance validation. Although both share the same VWM and VBR, the SMCJ device offers 1500 W peak pulse power versus 400 W for the SMAJ, and uses the larger SMC (DO-214AB) package versus SMA (DO-214AC). This results in different pad footprints, thermal profiles, and surge handling capability. Replacing SMAJ14AHE3/A with SMCJ14AHE3_A/H requires PCB land pattern revision and verification that downstream components can tolerate the higher clamping energy and altered current path impedance.
SMCJ14AHE3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 64.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ14AHE3_A/H FAQ
1.How can I place an order for SMCJ14AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14AHE3_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 SMCJ14AHE3_A/H reliable?
The price and inventory of SMCJ14AHE3_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 SMCJ14AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ14AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14AHE3_A/H?
SMCJ14AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14AHE3_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 SMCJ14AHE3_A/H?
For technical support, including SMCJ14AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ14AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ14AHE3_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 SMCJ14AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ14AHE3_A/H?
All SMCJ14AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14AHE3_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 SMCJ14AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ14AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14AHE3_A/H Tags
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