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Vishay General Semiconductor - Diodes Division SMCJ14A-E3/9AT
- Part No.:
- SMCJ14A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14A-E3/9AT.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,001
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Product details
Overview
SMCJ14A-E3/9AT 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 (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ14A-E3/9AT datasheet, SMCJ14A-E3/9AT pinout, SMCJ14A-E3/9AT application, or SMCJ14A-E3/9AT equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, AEC-Q101 qualification status, and real-world protection use cases for ESD and load-switching transients.
Technical Context
The SMCJ14A-E3/9AT operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its VBR range (15.6–17.2 V), with fast response time (<1 ns) to clamp transient surges before downstream IC damage occurs. Its low incremental surge resistance ensures stable clamping under high-current pulses up to 64.7 A (10/1000 µs).
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C when mounted on 8.0 mm × 8.0 mm copper pads per terminal. The device meets MSL Level 1 (J-STD-020) and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V systems. |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPPM | 23.2 V at IPPM = 64.7 A - clamped voltage during worst-case 1500 W transient; limits stress on protected 15 V logic or analog circuitry. |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage at 14 V; prevents measurable power loss or bias shift in high-impedance sensor nodes. |
| TJ max. | +150 °C - maximum junction temperature; enables deployment in under-hood automotive environments without thermal shutdown. |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard reflow profiles. |
Pinout & Package
SMCJ14A-E3/9AT uses the SMC (DO-214AB) package: a molded, halogen-free, UL 94 V-0 compliant body with matte tin-plated leads. Polarity is marked by a cathode band on the case end; the banded terminal is the cathode (anode is unmarked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when VLINE > VBR, clamping voltage to ≤23.2 V. |
| Anode (unmarked end) | Reference node | Typically tied to system ground or low-impedance return path; completes conduction loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combined wave surges (40 Ω source impedance) up to ±1 kV without degradation. |
| 23.2 V clamping at 64.7 A | Ensures protected 15 V microcontroller I/O or CAN transceiver pins remain below absolute maximum ratings during transients. |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive reliability standards; SMCJ14A-E3/9AT is commercial-grade but shares identical die and construction. |
| MSL Level 1 moisture sensitivity | Enables unlimited floor life and standard reflow processing without baking - reduces manufacturing overhead and risk of popcorning. |
| Glass passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure in industrial enclosures. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery-fed ECUs exposed to load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes above 17.2 V. Use Value: Limits peak voltage to 23.2 V during 1500 W surges, preventing damage to upstream LDOs and MCU power domains. |
Use Scenario: 4–20 mA current-loop sensor outputs routed through noisy factory floors with motor drives and solenoids. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to shunt inductive kickback from nearby relay coils. Use Value: Sub-1 ns response clamps transients before they couple into precision ADC front-ends or op-amp buffers. |
| Telecom DC Power Feeds | Consumer USB Power Delivery Ports |
|
Use Scenario: -48 V telecom rectifier outputs feeding base station backplanes with hot-swap controllers. IC Role / Device Role / Timing Role: Unidirectional SMCJ14A-E3/9AT used on positive rail to suppress switching noise and lightning-induced surges. Use Value: 1.0 µA leakage at 14 V avoids loading sensitive -48 V monitoring circuits while maintaining 1500 W surge capacity. |
Use Scenario: USB-C PD 5 V/9 V/15 V power paths in portable monitors and docking stations. IC Role / Device Role / Timing Role: TVS placed after buck converter output to protect Type-C controller and port multiplexer from ESD and cable-insertion spikes. Use Value: 23.2 V clamping safely covers 15 V PD profiles while allowing headroom for 12 V auxiliary rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR/VC specs. | Suitable for space-constrained consumer PCBs where 1500 W surge immunity is not required. | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 ESD only. |
| SMCJ14CA-E3/9AT | Bidirectional variant; identical VWM (14 V), symmetric VBR (±15.6–17.2 V), same PPPM/VC. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs. | Choose only if protecting bidirectional signals; unidirectional SMCJ14A-E3/9AT is more cost-effective for DC rails. |
Compared with SMAJ14A-E3/61T, SMCJ14A-E3/9AT delivers 3.75× higher surge power handling in a slightly larger footprint; versus SMCJ14CA-E3/9AT, it offers lower capacitance and avoids unnecessary bidirectional conduction in DC-only applications.
Availability
SMCJ14A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, telecom power supplies, and USB-C PD designs requiring stable component supply and full traceability.
Supply support for SMCJ14A-E3/9AT 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments, balancing clamping performance, thermal robustness, and manufacturability for automated SMT assembly.
FAQ
What is the maximum clamping voltage of the SMCJ14A-E3/9AT under rated surge conditions?
The SMCJ14A-E3/9AT has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current (IPPM) of 64.7 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 23.2 V during worst-case transient events - critical for safeguarding 15 V logic rails and analog front-ends. The SMCJ14A-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ14A-E3/9AT RoHS-compliant and lead-free?
Yes, the SMCJ14A-E3/9AT is RoHS-compliant and lead-free, as indicated by the "E3" suffix per Vishay's ordering nomenclature. It uses matte tin-plated leads and conforms to JEDEC J-STD-020 MSL Level 1, with no exemptions required for lead content. The molding compound meets UL 94 V-0 flammability rating, and all materials comply with Vishay's standard for hazardous substance restrictions defined in document 99912. The SMCJ14A-E3/9AT is fully compatible with lead-free reflow soldering processes.
Can the SMCJ14A-E3/9AT be used in automotive applications?
The SMCJ14A-E3/9AT itself is commercial-grade, but Vishay offers AEC-Q101 qualified versions under the HE3 and HM3 suffixes (e.g., SMCJ14AHE3_A/I). While the SMCJ14A-E3/9AT shares identical die, package, and electrical characteristics, it lacks formal automotive qualification documentation. For production automotive systems requiring AEC-Q101 compliance, engineers should specify the HE3 variant. The SMCJ14A-E3/9AT remains suitable for non-safety-critical automotive prototypes or aftermarket modules where qualification is not mandated.
How does the SMCJ14A-E3/9AT compare to the SMAJ14A in terms of surge handling?
The SMCJ14A-E3/9AT delivers 1500 W peak pulse power (PPPM), whereas the SMAJ14A is rated for only 400 W - a 3.75× difference. This stems from the SMCJ's larger SMC (DO-214AB) package, which provides superior thermal dissipation and lower incremental surge resistance. Both share identical VWM (14 V), VBR (15.6–17.2 V), and VC (23.2 V), but the SMCJ14A-E3/9AT sustains higher energy transients without thermal runaway. Use SMCJ14A-E3/9AT where IEC 61000-4-5 Level 4 immunity is required; SMAJ14A suffices for ESD-only protection.
What is the thermal resistance of the SMCJ14A-E3/9AT, and how does it affect layout?
The SMCJ14A-E3/9AT 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. Its junction-to-lead resistance (RθJL) is 15 °C/W, indicating efficient heat transfer to PCB copper. To maintain TJ ≤ 150 °C under continuous 6.5 W dissipation, designers must ensure adequate copper area and avoid excessive ambient temperatures. The SMCJ14A-E3/9AT's low RθJL allows effective thermal coupling to internal ground planes - critical for high-reliability industrial deployments.
SMCJ14A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ14A-E3/9AT FAQ
1.How can I place an order for SMCJ14A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14A-E3/9AT 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 SMCJ14A-E3/9AT reliable?
The price and inventory of SMCJ14A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ14A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14A-E3/9AT?
SMCJ14A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14A-E3/9AT 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 SMCJ14A-E3/9AT?
For technical support, including SMCJ14A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ14A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ14A-E3/9AT 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 SMCJ14A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ14A-E3/9AT?
All SMCJ14A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14A-E3/9AT, 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 SMCJ14A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ14A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14A-E3/9AT Tags
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