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Vishay General Semiconductor - Diodes Division SMCJ14CAHE3/9AT
- Part No.:
- SMCJ14CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CAHE3/9AT.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,197
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Product details
Overview
SMCJ14CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 64.7 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the SMCJ14CAHE3/9AT datasheet, SMCJ14CAHE3/9AT pinout, SMCJ14CAHE3/9AT application, or SMCJ14CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VWM = 1.66), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), while the SMC package provides low thermal resistance (RθJL = 15 °C/W) for reliable energy dissipation during transient events.
The SMCJ14CAHE3/9AT is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020. Its AEC-Q101 qualification confirms suitability for automotive under-hood and body electronics where robustness against load dump and ESD-induced surges is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 23.2 V at 64.7 A - clamped voltage during full 1500 W surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges |
| TJ max | +150 °C - maximum junction temperature supporting operation in high-ambient automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal relief |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMCJ14CAHE3/9AT uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two coplanar matte tin-plated leads. No polarity marking is present on bidirectional variants; terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no DC bias dependency |
| Lead 1 / Lead 2 | Surge current path | Both leads conduct equal surge current in either direction; requires identical PCB trace routing for balanced impedance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands 10/1000 µs surges up to 64.7 A - sufficient for ISO 7637-2 Pulse 5a load dump simulation |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock per AEC standards |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - compatible with standard lead-free SMT processes |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Port |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within <1 ns to suppress transients exceeding 14 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and analog front-ends during vehicle battery disconnect events. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V field wiring exposed to inductive switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff clamping element shunting surge current away from optocoupler inputs and level-shifting circuitry. Use Value: Maintains signal integrity by limiting transient voltage to ≤23.2 V, ensuring reliable logic-level recognition under harsh factory EMI conditions. |
| Telecom Line Driver Protection | Consumer USB Power/Data Line |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from induced surges on long-distance twisted-pair cabling. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common ground, clamping common- and differential-mode transients simultaneously. Use Value: Enables compliance with ITU-T K.21 Basic Protection Level by limiting peak line-to-ground voltage to safe levels during surge testing. | Use Scenario: Adding secondary overvoltage protection on VBUS and D+/D− lines of USB-C ports in portable audio/video devices. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp placed after primary fuse and upstream of USB controller ESD diodes. Use Value: Absorbs residual energy from hot-swap insertion spikes and contact bounce, reducing failure rate in high-volume consumer production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC14CA | Lower PPPM (600 W), same VWM (14 V), smaller SMA package | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 |
| 1.5KE14CA | Through-hole TO-218 package, same VWM/VC, higher thermal mass but incompatible with SMT | Requires manual assembly or wave soldering; not suitable for high-density automated PCBs | Choose only for legacy through-hole designs or prototyping where rework tolerance is prioritized over production efficiency |
Compared with SAC14CA and 1.5KE14CA, the SMCJ14CAHE3/9AT delivers superior surge handling (1500 W vs. 600 W or 1500 W with manual assembly trade-off), AEC-Q101 qualification for automotive deployment, and SMC package compatibility with high-speed pick-and-place lines - making it optimal for volume automotive and industrial SMT production.
Availability
SMCJ14CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line driver safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMCJ14CAHE3/9AT 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, power efficiency, and automotive-grade validation.
The SMCJ series is engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - balancing clamping performance, thermal robustness, and AEC-Q101-compliant manufacturing consistency.
FAQ
What does the "CA" suffix indicate in SMCJ14CAHE3/9AT?
The "CA" suffix in SMCJ14CAHE3/9AT denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SMCJ14A), it has no cathode marking and functions identically regardless of voltage polarity - essential for protecting AC-coupled or floating signal paths without polarity constraints.
Is SMCJ14CAHE3/9AT qualified for automotive applications?
Yes, SMCJ14CAHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code "HE3". This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its use in automotive powertrain, chassis, and body electronics where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of SMCJ14CAHE3/9AT and how is it measured?
The maximum clamping voltage (VC) of SMCJ14CAHE3/9AT is 23.2 V, measured at 64.7 A peak pulse current (IPPM) using a 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events and is specified at TA = 25 °C with recommended 8.0 mm × 8.0 mm copper pads per terminal.
How does the SMCJ14CAHE3/9AT differ from the unidirectional SMCJ14AHE3/9AT?
SMCJ14CAHE3/9AT is bidirectional with symmetrical breakdown and no polarity marking, while SMCJ14AHE3/9AT is unidirectional with a cathode band and conducts forward current only in one direction. The bidirectional version supports AC signal lines and floating grounds; the unidirectional variant offers slightly lower leakage at VWM but requires correct orientation during placement.
What packaging format is used for SMCJ14CAHE3/9AT and what are its assembly implications?
SMCJ14CAHE3/9AT ships in 13-inch plastic tape and reel (package code 9AT), containing 3500 units per reel. Its SMC (DO-214AB) package is MSL Level 1 compliant, allowing unlimited exposure to ambient conditions and standard lead-free reflow profiles up to 260 °C peak - fully compatible with high-throughput automated SMT lines without dry pack or baking requirements.
SMCJ14CAHE3/9AT 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:
- -
- 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)
SMCJ14CAHE3/9AT FAQ
1.How can I place an order for SMCJ14CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CAHE3/9AT 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 SMCJ14CAHE3/9AT reliable?
The price and inventory of SMCJ14CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ14CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CAHE3/9AT?
SMCJ14CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CAHE3/9AT 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 SMCJ14CAHE3/9AT?
For technical support, including SMCJ14CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ14CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ14CAHE3/9AT 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 SMCJ14CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ14CAHE3/9AT?
All SMCJ14CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CAHE3/9AT, 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 SMCJ14CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ14CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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