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Vishay General Semiconductor - Diodes Division SMCJ14CAHE3_A/I
- Part No.:
- SMCJ14CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CAHE3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,546
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Product details
Overview
SMCJ14CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 23.2 V maximum clamping voltage at 64.7 A IPPM, 14 V standoff voltage, and ±15.6–17.2 V breakdown range - used to protect automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMCJ14CAHE3_A/I datasheet, SMCJ14CAHE3_A/I pinout, SMCJ14CAHE3_A/I application, or SMCJ14CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, SMC package thermal performance, and compatibility with 14 V nominal supply systems requiring robust ESD and load-dump protection.
Technical Context
This device operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 14 V), while the SMC package delivers RθJA = 75 °C/W and RθJL = 15 °C/W for reliable thermal management under repetitive surge conditions.
Designed per ANSI/IEEE C62.35 standards, it responds within picoseconds to 10/1000 µs waveform surges, maintaining clamping voltage ≤23.2 V at rated IPPM. The AEC-Q101 qualification confirms suitability for automotive environments including engine control units and ADAS sensor interfaces where temperature cycling and vibration resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 12–14 V automotive systems. |
| VBR min/max | 15.6 V / 17.2 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold across production lots. |
| VC @ IPPM | 23.2 V - Clamped voltage at 64.7 A peak pulse current; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy transients like ISO 7637-2 Pulse 5a (load dump). |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive locations and industrial enclosures without derating. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal footprint per terminal. |
Pinout & Package
SMCJ14CAHE3_A/I uses a 2-terminal SMC (DO-214AB) package with no polarity marking - terminals are symmetrical and interchangeable due to bidirectional functionality. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per lead for rated thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identically as clamping nodes; no cathode band or polarity identification required for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, mechanical shock, and humidity testing per JESD22 standards. |
| 1500 W peak pulse power | Withstands ISO 7637-2 load dump pulses and IEC 61000-4-5 surge events without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected circuitry - e.g., 23.2 V clamping at 17.2 V breakdown ensures tight protection window. |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity by limiting voltage excursions to ≤23.2 V during 64.7 A surges, preventing latch-up or damage to 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid de-energization or lightning-induced coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, positioned upstream of optocoupler or Schmitt-trigger input stages. Use Value: Absorbs up to 1500 W transient energy without failure, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements. |
| DC Power Rail Protection | Telecom Line Interface Protection |
Use Scenario: Guarding 12–14 V battery-fed subsystems (e.g., infotainment head units, body control modules) against load dump events per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Parallel-connected TVS across input rail to clamp voltage spikes exceeding 14 V standby level. Use Value: Limits peak rail voltage to 23.2 V during 100 ms load dump transients, protecting downstream DC/DC converters and microcontrollers. | Use Scenario: Protecting Ethernet PHY front-end circuits and PoE-powered devices from induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Bidirectional clamp on differential pairs (e.g., TX+/TX−) to suppress common-mode transients while preserving signal fidelity. Use Value: Provides <1.0 µA leakage at 14 V, minimizing impact on line biasing and ensuring compatibility with IEEE 802.3af/at signaling thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CAHE3_A/I | Lower PPPM (400 W), smaller SMA package, higher RθJA (110 °C/W), same VWM/VBR/VC ratings. | Not suitable for ISO 7637-2 load dump; limited to ESD and lower-energy EFT events. | Select when board space is constrained and surge energy is ≤400 W. |
| SMCJ14AHE3_A/I | Unidirectional version; includes cathode band marking; identical VWM/VBR/VC/PPPM but asymmetric conduction. | Requires correct polarity placement; unsuitable for AC-coupled or differential signal lines. | Choose only for DC-biased unidirectional rails where polarity is fixed and known. |
Compared with SMAJ14CAHE3_A/I and SMCJ14AHE3_A/I, the SMCJ14CAHE3_A/I uniquely combines bidirectional symmetry, 1500 W surge capacity, and AEC-Q101 qualification - making it the only option among the three validated for automotive load dump protection without polarity constraints.
Availability
SMCJ14CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ14CAHE3_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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and transportation applications demanding AEC-Q101 compliance and 1500 W surge robustness.
FAQ
What does the "CA" suffix indicate in SMCJ14CAHE3_A/I?
The "CA" suffix in SMCJ14CAHE3_A/I denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities without polarity marking. This distinguishes it from unidirectional variants (e.g., SMCJ14AHE3_A/I) that require correct anode/cathode orientation and feature a cathode band. The SMCJ14CAHE3_A/I is therefore ideal for AC-coupled lines, differential signals, and applications where voltage polarity reversal may occur.
Is SMCJ14CAHE3_A/I qualified for automotive use?
Yes, SMCJ14CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number 88394, Revision 09-Jan-2024). This qualification covers temperature cycling, mechanical shock, humidity resistance, and other stress tests required for automotive under-hood and cabin applications - making SMCJ14CAHE3_A/I suitable for engine control units, ADAS sensors, and body electronics.
What is the maximum clamping voltage of SMCJ14CAHE3_A/I and at what current?
The maximum clamping voltage (VC) of SMCJ14CAHE3_A/I is 23.2 V, measured at its rated peak pulse current (IPPM) of 64.7 A using a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table of the Vishay datasheet and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Does SMCJ14CAHE3_A/I have polarity markings on the package?
No, SMCJ14CAHE3_A/I has no polarity markings on the SMC (DO-214AB) package because it is a bidirectional TVS diode. Unlike unidirectional versions (e.g., SMCJ14AHE3_A/I) that feature a cathode band, the SMCJ14CAHE3_A/I terminals are functionally identical and interchangeable. This simplifies PCB layout and eliminates orientation errors during automated assembly.
What is the thermal resistance specification for SMCJ14CAHE3_A/I?
The SMCJ14CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, as specified in the Thermal Characteristics section of the Vishay datasheet. These values assume mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - essential for achieving rated 1500 W surge performance and sustained 6.5 W power dissipation at TA = 50 °C.
SMCJ14CAHE3_A/I 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):
- 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)
SMCJ14CAHE3_A/I FAQ
1.How can I place an order for SMCJ14CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CAHE3_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 SMCJ14CAHE3_A/I reliable?
The price and inventory of SMCJ14CAHE3_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 SMCJ14CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ14CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CAHE3_A/I?
SMCJ14CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CAHE3_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 SMCJ14CAHE3_A/I?
For technical support, including SMCJ14CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ14CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ14CAHE3_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 SMCJ14CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ14CAHE3_A/I?
All SMCJ14CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CAHE3_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 SMCJ14CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ14CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14CAHE3_A/I Tags
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