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Vishay General Semiconductor - Diodes Division SMCJ14A-M3/57T
- Part No.:
- SMCJ14A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14A-M3/57T.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,777
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Product details
Overview
SMCJ14A-M3/57T 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 range at 1 mA, 23.2 V clamping voltage at 64.7 A peak pulse current (10/1000 µs), and 1500 W peak pulse power rating - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ14A-M3/57T datasheet, SMCJ14A-M3/57T pinout, SMCJ14A-M3/57T application, or SMCJ14A-M3/57T equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ14A-M3/57T operates as a silicon avalanche diode that enters controlled breakdown above its specified VBR threshold, diverting transient energy away from protected circuitry. Its glass-passivated junction ensures stable electrical characteristics and low incremental surge resistance, enabling consistent clamping performance across repeated transients.
It conforms to IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) immunity requirements when applied with appropriate PCB layout - including short trace lengths, direct grounding to chassis or power plane, and minimal loop area between anode and cathode connections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - maximum continuous reverse working voltage before significant leakage; defines upper limit of normal operating rail voltage. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1.0 mA - guaranteed avalanche initiation range; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 23.2 V at 64.7 A (10/1000 µs) - peak voltage seen by protected IC during worst-case surge; must be below downstream device absolute maximum rating. |
| PPPM (Peak Pulse Power) | 1500 W - maximum transient energy absorption capability under standardized 10/1000 µs waveform; determines survivability against lightning-induced surges. |
| IPPM (Peak Pulse Current) | 64.7 A - corresponding surge current at VC; used to size upstream fusing and verify PCB trace current capacity. |
| TJ Range | -55 °C to +150 °C - full operational junction temperature range; supports under-hood automotive and industrial ambient conditions. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
SMCJ14A-M3/57T uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, cathode identified by a band on the body. Thermal resistance is RθJA = 75 °C/W (typ.) on recommended 8.0 mm × 8.0 mm copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during reverse-biased transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail); polarity marking (band) prevents incorrect orientation during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms compliance with JEDEC J-STD-201 Class 2 whisker resistance and environmental regulations without compromising surge robustness. |
| Very fast response time | Sub-nanosecond turn-on enables protection against ESD events (IEC 61000-4-2 ±8 kV contact) before sensitive ICs experience overstress. |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt transients, reducing stress on downstream MOSFETs or microcontrollers. |
| AEC-Q101 qualification option | Available in HM3 variant (e.g., SMCJ14AHM3_X); this M3 version shares identical electrical specs but lacks formal automotive qualification documentation. |
| Automated placement compatibility | Low-profile SMC package with defined lead geometry supports high-yield pick-and-place at >30,000 UPH in production SMT lines. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump pulses up to 35 V and ISO 7637-2 Test Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach LDOs or MCU power pins. Use Value: Clamps 35 V load dump to ≤23.2 V within nanoseconds, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. | Use Scenario: Analog output lines (e.g., 4–20 mA current loop) in factory automation sensors subject to EFT bursts and cable coupling noise. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting induced surges to local ground plane before reaching op-amp input stage. Use Value: Limits transient-induced offset error and prevents op-amp saturation, maintaining measurement accuracy during electromagnetic disturbances. |
| Consumer USB Power Port Protection | Telecom DC Feeder Protection |
Use Scenario: 5 V USB Type-A port on set-top box or smart display experiencing hot-plug voltage spikes and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, oriented to block reverse current while clamping positive surges to downstream PMIC. Use Value: Withstands ±15 kV air discharge (IEC 61000-4-2) and limits VBUS overshoot to <23.2 V, avoiding USB controller reset or brownout. | Use Scenario: -48 V DC power feeders in telecom base station remote radio units subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: TVS array element protecting primary DC-DC converter input stage from common-mode transients entering via shielded pair. Use Value: Absorbs 1500 W peak pulse energy without degradation, preserving uptime in harsh outdoor environments where replacement is costly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-M3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs. | Not suitable for 1500 W surge environments; limited to lower-energy ESD/EFT scenarios. | Select only if board space is constrained and surge threat level is ≤400 W (e.g., internal signal lines). |
| SMCJ14CA-M3/57T | Bidirectional variant; symmetric VBR and VC in both polarities; same PPPM and package. | Required for AC-coupled or floating signal paths where polarity reversal occurs (e.g., RS-485, audio lines). | Choose when protecting bidirectional data lines or systems lacking defined ground reference. |
Compared with SMAJ14A-M3/57T and SMCJ14CA-M3/57T, the SMCJ14A-M3/57T delivers higher surge robustness in a standardized SMC footprint while maintaining unidirectional polarity - making it optimal for cost-sensitive, high-reliability DC rail protection where polarity is fixed and surge energy exceeds 400 W.
Availability
SMCJ14A-M3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power supply designs requiring stable component supply, halogen-free compliance, and proven 1500 W transient immunity.
Supply support for SMCJ14A-M3/57T 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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through robust, standardized, and manufacturable solutions.
FAQ
What is the maximum clamping voltage of the SMCJ14A-M3/57T under standard test conditions?
The SMCJ14A-M3/57T has a maximum clamping voltage (VC) of 23.2 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 64.7 A. This value is measured per IEC 61000-4-5 and defines the highest voltage imposed on protected circuitry during a standardized surge event. The SMCJ14A-M3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ14A-M3/57T suitable for automotive applications requiring AEC-Q101 qualification?
The SMCJ14A-M3/57T is halogen-free and RoHS-compliant (M3 suffix) but is not AEC-Q101 qualified. For automotive use, engineers should select the SMCJ14AHM3_X variant, which carries the HM3 suffix and formal AEC-Q101 certification. The SMCJ14A-M3/57T shares identical electrical specifications and package dimensions but lacks the extended reliability testing required for under-hood deployment.
How does the SMCJ14A-M3/57T differ from the bidirectional SMCJ14CA-M3/57T?
The SMCJ14A-M3/57T is unidirectional with cathode marked by a band, intended for DC rail protection where polarity is fixed. The SMCJ14CA-M3/57T is bidirectional, offering symmetrical clamping in both directions and no polarity marking - required for AC signals or floating lines like RS-485. Both share identical VWM, VC, PPPM, and SMC package, but the SMCJ14A-M3/57T cannot protect against negative-going transients on positively biased lines.
What is the thermal resistance and recommended pad layout for the SMCJ14A-M3/57T?
The SMCJ14A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This layout is critical to sustain its 1500 W peak pulse rating and prevent thermal runaway during repetitive surges. The SMCJ14A-M3/57T must be placed with short, wide traces and direct thermal connection to inner ground/power planes.
Does the SMCJ14A-M3/57T meet UL recognition requirements?
Yes, the SMCJ14A-M3/57T is Underwriters Laboratories (UL) recognized under file number E136766 for both unidirectional and bidirectional variants, complying with UL 497B for signal and power circuit protectors. This recognition covers flammability (UL 94 V-0), surge endurance, and safety isolation - confirming suitability for end-equipment certification in North America and globally harmonized markets.
SMCJ14A-M3/57T 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-M3/57T FAQ
1.How can I place an order for SMCJ14A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ14A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ14A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14A-M3/57T?
SMCJ14A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14A-M3/57T 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-M3/57T?
For technical support, including SMCJ14A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14A-M3/57T requirements.
6.How does Aetrix verify that SMCJ14A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ14A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ14A-M3/57T?
All SMCJ14A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ14A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14A-M3/57T Tags
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