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Vishay General Semiconductor - Diodes Division SMCJ14A-M3/9AT
- Part No.:
- SMCJ14A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14A-M3/9AT.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,540
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Product details
Overview
SMCJ14A-M3/9AT from Vishay General Semiconductor is a unidirectional 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 peak pulse current, 14 V stand-off voltage, and 15.6–17.2 V breakdown voltage range. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ14A-M3/9AT datasheet, SMCJ14A-M3/9AT pinout, SMCJ14A-M3/9AT application, or SMCJ14A-M3/9AT equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at 14 V, -55 °C to +150 °C operating junction temperature, halogen-free RoHS compliance (M3 suffix), and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under 10/1000 µs waveform stress.
The SMCJ14A-M3/9AT is rated for 1500 W peak pulse power dissipation, 6.5 W steady-state power on infinite heatsink at 50 °C ambient, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine). Thermal resistance is 75 °C/W junction-to-ambient and 15 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 14 V - Maximum continuous reverse working voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 15.6–17.2 V at 1.0 mA - Confirmed voltage range where device transitions into avalanche conduction |
| Clamping Voltage (VC) | 23.2 V at 64.7 A IPPM - Peak voltage seen across protected circuit during 10/1000 µs surge |
| Peak Pulse Power (PPPM) | 1500 W - Surge energy handling capacity per IEC 61000-4-5 and ANSI/IEEE C62.35 standards |
| Reverse Leakage (ID) | 1.0 µA max at 14 V - Low standby current ensuring minimal impact on upstream bias networks |
| Operating Temperature | -55 °C to +150 °C - Validated junction temperature range for automotive and industrial deployment |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
SMCJ14A-M3/9AT uses the standard SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on the body, and polarity-critical unidirectional configuration. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for full 1500 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms compliance with environmental regulations and JESD201 Class 2 whisker resistance |
| MSL Level 1 rating | Supports lead-free reflow without preconditioning; peak solder temperature up to 260 °C |
| Low incremental surge resistance | Enables tighter clamping (23.2 V @ 64.7 A) versus higher-resistance alternatives |
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under repeated transient stress |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive-grade deployment; this M3 variant is commercial grade |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 14 V. Use Value: Limits voltage excursions to ≤23.2 V during 1500 W pulses, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Parallel-connected clamping device on signal path with low capacitance (<100 pF typical). Use Value: 1.0 µA leakage at 14 V avoids loading high-impedance sensor outputs; fast response preserves signal integrity. |
| DC Motor Drive Gate Protection | Telecom Power Interface Surge Suppression |
Use Scenario: Safeguarding MOSFET gate drivers in H-bridge motor controllers from inductive kickback. IC Role / Device Role / Timing Role: Clamping diode across gate-source terminals or supply rails to absorb flyback energy. Use Value: 200 A IFSM rating handles repetitive switching surges; 150 °C TJ max enables operation near hot power stages. | Use Scenario: Front-end protection on 48 V telecom power inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS in series with fuse and filter, positioned before DC/DC converters. Use Value: 1500 W PPPM meets GR-1089-CORE Level 3 requirements; DO-214AB footprint allows high-density board layout. |
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), SMA package (smaller thermal mass), same VWM/VBR/VC specs | Not suitable for 1500 W surge environments; limited to lower-energy transients | Select only if board space is constrained and surge threat level is ≤400 W |
| SMCJ14CA-M3/9AT | Bidirectional version; identical VWM/VBR/VC but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose when protecting differential pairs, RS-485 buses, or ungrounded sensor interfaces |
Compared with SMCJ14A-M3/9AT, SMAJ14A-E3/61T trades surge capacity for compactness, while SMCJ14CA-M3/9AT adds bidirectional symmetry at no clamping performance cost-neither is pin-compatible due to differing polarity marking and internal structure.
Availability
SMCJ14A-M3/9AT is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, DC motor drive protection, and telecom power input stages requiring stable component supply and halogen-free compliance.
Supply support for SMCJ14A-M3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing infrastructure focused on reliability and compliance.
The SMCJ series targets high-energy transient suppression in harsh environments; it was engineered specifically for automotive, industrial, and telecom systems needing robust, surface-mountable clamping with validated AEC-Q101 options.
FAQ
What is the maximum clamping voltage of the SMCJ14A-M3/9AT under a 10/1000 µs surge?
The SMCJ14A-M3/9AT has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 64.7 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMCJ14A-M3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ14A-M3/9AT suitable for automotive applications?
The SMCJ14A-M3/9AT is halogen-free and RoHS-compliant (M3 suffix) but is not AEC-Q101 qualified. For automotive use, Vishay offers the HM3 variant (e.g., SMCJ14A-HM3/9AT), which carries full AEC-Q101 qualification. The SMCJ14A-M3/9AT remains appropriate for commercial-grade automotive subsystems where qualification is not mandated, such as infotainment power supplies or body control modules outside safety-critical domains.
What does the "M3" suffix indicate in SMCJ14A-M3/9AT?
The "M3" suffix in SMCJ14A-M3/9AT denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance requirements. It also signifies compliance with Vishay's material categorization standard (doc?99912) and qualifies the part for lead-free reflow per J-STD-020 MSL Level 1. This distinguishes it from the E3 (RoHS-compliant, non-halogen-free) and HM3 (AEC-Q101 qualified + halogen-free) variants.
How does the SMCJ14A-M3/9AT differ from the bidirectional SMCJ14CA-M3/9AT?
The SMCJ14A-M3/9AT is unidirectional with cathode marking and conducts only in reverse bias above VBR, while the SMCJ14CA-M3/9AT is bidirectional and clamps symmetrically in both polarities. Their VWM (14 V), VBR (15.6–17.2 V), and VC (23.2 V) match, but the CA version lacks polarity marking and supports AC or floating signal protection. The SMCJ14A-M3/9AT cannot substitute for the CA type in bidirectional applications without circuit redesign.
What PCB layout guidance applies to the SMCJ14A-M3/9AT to achieve full 1500 W rating?
To achieve the full 1500 W peak pulse power rating, the SMCJ14A-M3/9AT must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Trace width and copper thickness should minimize inductance; short, direct paths to ground planes are essential. Thermal vias under pads improve heat dissipation. Deviation from this layout reduces surge capability proportionally, and derating curves (Fig. 2) must be consulted for elevated ambient temperatures.
SMCJ14A-M3/9AT 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 (SMC)
SMCJ14A-M3/9AT FAQ
1.How can I place an order for SMCJ14A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14A-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCJ14A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ14A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14A-M3/9AT?
SMCJ14A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14A-M3/9AT 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-M3/9AT?
For technical support, including SMCJ14A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ14A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ14A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ14A-M3/9AT?
All SMCJ14A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ14A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14A-M3/9AT Tags
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