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Vishay General Semiconductor - Diodes Division SMCJ14AHE3/9AT
- Part No.:
- SMCJ14AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14AHE3/9AT.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,287
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Product details
Overview
SMCJ14AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown range (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 a 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and DC power supplies.
For engineers reviewing the SMCJ14AHE3/9AT datasheet, SMCJ14AHE3/9AT pinout, SMCJ14AHE3/9AT application, or SMCJ14AHE3/9AT equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, glass-passivated junction, and MSL Level 1 reflow compatibility - critical for high-reliability board-level ESD and load-dump protection design validation.
Technical Context
This TVS operates as a unidirectional avalanche clamp: reverse-biased during normal operation, it remains high-impedance until transient voltage exceeds VBR, then rapidly transitions to low-impedance conduction to shunt surge energy away from protected circuitry. Its 1500 W PPPM rating is validated on 8.0 mm × 8.0 mm copper pads per terminal, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W enabling effective heat dissipation in compact layouts.
The device uses a DO-214AB (SMC) package with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102, and its cathode band marking enables unambiguous polarity identification. With 1.0 µA max reverse leakage at 14 V and 0.087 %/°C VBR temperature coefficient, it maintains stable clamping performance across -55 °C to +150 °C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - guaranteed avalanche initiation range; ensures reliable triggering above system transients but below IC absolute maximum ratings. |
| VC (Clamping Voltage) | 23.2 V at 64.7 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge; enables safe margin for 20 V-rated components. |
| PPPM (Peak Pulse Power) | 1500 W - surge energy handling capacity under standardized 10/1000 µs waveform; supports automotive load-dump and ISO 7637-2 Pulse 5a compliance. |
| IPPM (Peak Pulse Current) | 64.7 A - maximum non-repetitive surge current the device can safely divert without degradation; verified with derating above 25 °C ambient. |
| TJmax | +150 °C - maximum junction temperature; supports operation in under-hood automotive environments and high-power industrial enclosures. |
| AEC-Q101 Qualified | Yes - qualified per stress test requirements for automotive electronic components; required for use in engine control, ADAS, and body electronics. |
Pinout & Package
Package: SMC (DO-214AB) - surface-mount, low-profile plastic case with 8.0 mm × 8.0 mm minimum copper pad layout per terminal; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or lower-potential rail in unidirectional configuration; enables low-VF (3.5 V @ 100 A) path during surge. |
| Cathode | Current exit terminal during reverse-biased clamping | Marked with band; connected to protected line (e.g., 12 V supply); defines polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge events without parameter drift. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive kick), improving protection margin for sensitive downstream ICs. |
| Very fast response time (< 1 ps) | Activates within picoseconds of overvoltage onset - faster than MOVs or polymer-based protectors - preserving signal integrity in high-speed interfaces. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102; eliminates whisker risk per JESD 201 Class 2, supporting automated assembly and long-term field reliability. |
| AEC-Q101 qualification (HE3 suffix) | Validates performance under automotive-grade temperature cycling, humidity bias, mechanical shock, and surge endurance - required for Tier 1 OEM designs. |
Applications
| Automotive Engine Control Unit (ECU) Power Input | Industrial PLC Digital Input Module |
|---|---|
|
Use Scenario: Protects 12 V supply rail of engine control units against ISO 7637-2 Pulse 5a (load dump) and alternator ripple surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and upstream fuse, clamping transients before they reach LDOs and microcontrollers. Use Value: 23.2 V clamping at 64.7 A ensures MCU VCC stays below 24 V absolute max rating during 120 V/500 ms load dump events. |
Use Scenario: Shields 24 V digital input channels in programmable logic controllers from field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Mounted directly at connector entry point, acting as first-line defense before optocoupler or Schmitt trigger input stage. Use Value: 1500 W PPPM handles repetitive 100 A inductive spikes without degradation, extending module service life in factory automation environments. |
| DC-DC Converter Output Stage | Automotive Camera Module Power Line |
|
Use Scenario: Safeguards regulated 5 V or 3.3 V outputs of isolated DC-DC converters against cross-talk and secondary-side switching noise. IC Role / Device Role / Timing Role: Placed downstream of output filter capacitor to suppress high-frequency ringing and overshoot during load steps. Use Value: 1.0 µA leakage at 14 V prevents measurable quiescent current increase, preserving efficiency in always-on power domains. |
Use Scenario: Secures 12 V power feed to rear-view or surround-view camera modules exposed to vehicle battery fluctuations and ESD from housing contact. IC Role / Device Role / Timing Role: Integrated into FAKRA or HSD connector subassembly, providing localized clamping before power conditioning ICs. Use Value: AEC-Q101 qualification and -55 °C to +150 °C operation ensure uninterrupted video stream during extreme thermal cycling in parked vehicles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14AHE3/9AT | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM/VBR specs | Suitable for space-constrained consumer electronics; insufficient for automotive load-dump duty cycles | Select when board area is limited and surge energy is ≤ 400 W; not AEC-Q101 qualified |
| SMCJ14CAHE3/9AT | Bidirectional variant with identical VWM/VBR/VC, but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., CAN bus, RS-485) where polarity reversal may occur | Choose for differential or bidirectional interfaces; adds no benefit for unidirectional DC rails |
Compared with SMAJ14AHE3/9AT, SMCJ14AHE3/9AT provides 3.75× higher surge power handling and automotive qualification; versus SMCJ14CAHE3/9AT, it offers lower capacitance and optimized unidirectional clamping for DC power rails - making it the preferred choice for 12 V automotive and industrial power protection.
Availability
SMCJ14AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC input protection, and DC-DC converter output safeguarding requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMCJ14AHE3/9AT 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure tolerance and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMCJ14AHE3/9AT at its rated peak pulse current?
The SMCJ14AHE3/9AT has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 64.7 A using the standard 10/1000 µs waveform. This value is measured under specified test conditions - mounted on 8.0 mm × 8.0 mm copper pads per terminal - and represents the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMCJ14AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCJ14AHE3/9AT suitable for automotive applications?
Yes, SMCJ14AHE3/9AT is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and camera modules. Its HE3 suffix denotes RoHS-compliant construction with AEC-Q101 stress testing, and its -55 °C to +150 °C operating junction temperature range supports under-hood deployment. The SMCJ14AHE3/9AT also meets ISO 7637-2 Pulse 5a load-dump immunity requirements when properly laid out with adequate copper pour.
How does the SMCJ14AHE3/9AT differ from the SMAJ14AHE3/9AT?
The SMCJ14AHE3/9AT differs from the SMAJ14AHE3/9AT primarily in package size and surge capability: SMCJ uses the larger DO-214AB (SMC) case with 1500 W peak pulse power, while SMAJ uses DO-214AC (SMA) with only 400 W. Both share identical VWM (14 V) and VBR (15.6–17.2 V), but the SMCJ14AHE3/9AT's higher thermal mass and lower RθJA enable sustained surge handling in demanding applications like automotive load-dump protection where the SMAJ14AHE3/9AT would fail.
What is the reverse leakage current specification for SMCJ14AHE3/9AT at its standoff voltage?
The SMCJ14AHE3/9AT specifies a maximum reverse leakage current (ID) of 1.0 µA at its standoff voltage (VWM) of 14 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes. The SMCJ14AHE3/9AT maintains tight leakage control across its full -55 °C to +150 °C operating range, with typical values remaining well below 1 µA at elevated temperatures.
Does SMCJ14AHE3/9AT have polarity markings, and how is it oriented on the PCB?
Yes, the SMCJ14AHE3/9AT features a visible cathode band on the package body, indicating the cathode terminal - which must be connected to the line being protected (e.g., 12 V rail), while the anode connects to ground. This unidirectional orientation is critical: reverse placement disables clamping functionality and risks catastrophic failure during overvoltage events. The SMCJ14AHE3/9AT's DO-214AB outline and band location match JEDEC standard SMC footprints, ensuring compatibility with automated optical inspection (AOI) and pick-and-place systems.
SMCJ14AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMCJ14AHE3/9AT FAQ
1.How can I place an order for SMCJ14AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14AHE3/9AT 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 SMCJ14AHE3/9AT reliable?
The price and inventory of SMCJ14AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ14AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14AHE3/9AT?
SMCJ14AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14AHE3/9AT 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 SMCJ14AHE3/9AT?
For technical support, including SMCJ14AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ14AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ14AHE3/9AT 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 SMCJ14AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ14AHE3/9AT?
All SMCJ14AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14AHE3/9AT, 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 SMCJ14AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ14AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14AHE3/9AT Tags
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