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Vishay General Semiconductor - Diodes Division SMCJ14A-E3/57T
- Part No.:
- SMCJ14A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14A-E3/57T.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,637
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Product details
Overview
SMCJ14A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal 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 (10/1000 µs waveform), commonly deployed for automotive ECU and industrial sensor line protection.
For engineers reviewing the SMCJ14A-E3/57T datasheet, SMCJ14A-E3/57T pinout, SMCJ14A-E3/57T application, or SMCJ14A-E3/57T equivalent, key selection criteria include verified unidirectional clamping performance, SMC package thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification eligibility (via HE3 suffix variants), and compliance with UL 497B surge protector classification.
Technical Context
The SMCJ14A-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to transient overvoltages. Its breakdown voltage range is 15.6–17.2 V at 1 mA test current, with temperature coefficient of +0.087 %/°C - enabling predictable derating above 25 °C ambient.
It sustains 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits low incremental surge resistance, ensuring stable clamping under high-energy transients. Mounting on 8.0 mm × 8.0 mm copper pads per terminal is required to achieve rated 1500 W PPPM per JEDEC-standard 10/1000 µs waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at IT = 1 mA - Verified avalanche initiation range; ensures consistent turn-on across production lots. |
| VC (Clamping Voltage) | 23.2 V at IPPM = 64.7 A - Peak voltage seen by protected circuit during 1500 W transient; critical for downstream IC survivability. |
| PPPM | 1500 W (10/1000 µs) - Energy-handling capacity for lightning-induced or inductive-switching surges per IEC 61000-4-5. |
| IPPM | 64.7 A - Peak current delivered during 1500 W transient; used to size PCB trace width and verify layout robustness. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; determines max power dissipation at given ambient temp. |
| TJ max | 150 °C - Maximum junction temperature; sets upper limit for thermal design margin in sealed enclosures or high-TA environments. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1 (260 °C reflow peak), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in unidirectional configuration | Connected to protected line (e.g., 12 V rail); cathode ties to ground or lower-potential reference for clamping action. |
| Anode | Ground-reference terminal | Must be connected to low-impedance system ground plane to ensure effective transient energy shunting and minimal VC overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables automated placement in space-constrained automotive and industrial PCBs; height ≤ 2.62 mm supports low-profile enclosures. |
| Glass-passivated junction | Ensures long-term reliability and stable VBR under humidity, thermal cycling, and high-temperature storage (TSTG = –55 to +150 °C). |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements for 12 V automotive power nets without external series impedance. |
| AEC-Q101 qualification path | E3 suffix enables drop-in upgrade to HE3 variant for automotive applications requiring stress-tested TVS components. |
| UL 497B recognition (QVGQ2) | Validates suitability for telecom and industrial surge protection systems requiring certified safety-classified protectors. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V supply rail of BCM microcontroller from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive-going surges to <23.2 V while blocking normal 12 V operation. Use Value: Prevents MCU reset or latch-up during ISO 7637-2 Pulse 5a (35 V/100 ms) events without adding series resistance or delay. |
Use Scenario: Shields 24 V digital input optocoupler interface from inductive kickback when controlling solenoids or relays. IC Role / Device Role / Timing Role: Fast-response avalanche diode diverts >60 A transient energy away from input conditioning circuitry. Use Value: Maintains signal integrity and extends optocoupler lifetime by limiting reverse voltage across input LED to <23.2 V. |
| Telecom Power Feeding Interface | Consumer Appliance Motor Drive Board |
Use Scenario: Guards PoE-powered device front-end against lightning-induced surges on DC feed lines. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs common-mode surges up to 1500 W while preserving 48 V nominal operation. Use Value: Enables UL 497B-certified surge protection without compromising PoE power delivery efficiency or bandwidth. |
Use Scenario: Clamps back-EMF spikes generated by brushed DC motor commutation on 12–24 V control board. IC Role / Device Role / Timing Role: Unidirectional suppressor placed across motor terminals limits voltage reversal seen by H-bridge MOSFETs. Use Value: Reduces gate oxide stress and prevents parasitic turn-on in half-bridge drivers during rapid motor deceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC14 | Lower PPPM (600 W), smaller SMA package, higher VC (27 V at 24 A), no UL 497B listing | Targeted at cost-sensitive consumer electronics with lower surge immunity requirements (IEC 61000-4-2 only) | Select SAC14 only if board space is constrained and 1500 W surge rating is not required. |
| SMCJ14CA-E3/57T | Bidirectional version with identical VWM/VC ratings but symmetric clamping in both polarities; same SMC package and thermal specs | Required for AC-coupled or floating signal lines where negative transients must also be suppressed (e.g., RS-485, CAN bus) | Choose SMCJ14CA-E3/57T when protecting bidirectional data lines or ungrounded power rails. |
Compared with SAC14, the SMCJ14A-E3/57T delivers 2.5× higher surge power handling and certified safety listing; compared with SMCJ14CA-E3/57T, it provides optimized unidirectional clamping with lower leakage and simpler grounding, making it preferred for DC power rail protection.
Availability
SMCJ14A-E3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power interface designs requiring stable component supply, RoHS compliance, and full traceability.
Supply support for SMCJ14A-E3/57T 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, and protection devices with emphasis on reliability, automotive qualification, and industry-standard compliance.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatable clamping, and regulatory certification are mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ14A-E3/57T under rated surge conditions?
The SMCJ14A-E3/57T has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated 64.7 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that downstream circuitry sees no more than 23.2 V during a 1500 W transient event. The SMCJ14A-E3/57T maintains this clamping performance across its specified operating temperature range (–55 °C to +150 °C), with VBR exhibiting a +0.087 %/°C temperature coefficient.
Is the SMCJ14A-E3/57T suitable for automotive applications?
The SMCJ14A-E3/57T itself is commercial-grade (E3 suffix), but it belongs to the AEC-Q101-qualified SMCJ family - meaning the identical die and construction are used in the HE3 variant (e.g., SMCJ14AHE3). Engineers may qualify the SMCJ14A-E3/57T for non-safety-critical automotive functions, or directly specify SMCJ14AHE3 for AEC-Q101-compliant designs. The SMCJ14A-E3/57T shares the same thermal, electrical, and mechanical specifications as its automotive-grade counterpart, including UL 497B recognition and MSL Level 1 reflow compatibility.
How does the SMCJ14A-E3/57T differ from the bidirectional SMCJ14CA-E3/57T?
The SMCJ14A-E3/57T is unidirectional and features a cathode band for polarity identification, while the SMCJ14CA-E3/57T is bidirectional with no polarity marking and symmetric clamping in both directions. Both share identical VWM (14 V), VC (23.2 V), and PPPM (1500 W) ratings, but the unidirectional SMCJ14A-E3/57T offers lower reverse leakage (<1.0 µA at VWM) and is optimized for DC rail protection. The SMCJ14A-E3/57T requires correct orientation during placement, whereas the SMCJ14CA-E3/57T simplifies layout for AC or floating nodes.
What PCB layout considerations are critical for achieving the rated 1500 W performance of the SMCJ14A-E3/57T?
To achieve the full 1500 W peak pulse power rating, the SMCJ14A-E3/57T must be mounted on minimum recommended copper pads: 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal, connected to internal ground/power planes via multiple thermal vias. Narrow traces or insufficient copper area increase thermal impedance and cause premature thermal runaway during surge events. The SMCJ14A-E3/57T's RθJA of 75 °C/W assumes this layout; deviating reduces safe operating current and clamping consistency. Keep high-current paths short and avoid routing sensitive signals near the TVS anode/cathode traces.
Does the SMCJ14A-E3/57T meet any safety or regulatory certifications?
Yes - the SMCJ14A-E3/57T carries Underwriters Laboratories (UL) recognition under file E136766 for protector classification per UL 497B, covering both unidirectional and bidirectional variants in the SMCJ family. It also meets RoHS Directive 2011/65/EU (E3 suffix), JESD201 Class 2 whisker resistance, and J-STD-020 MSL Level 1 moisture sensitivity. These certifications validate its use in safety-critical surge protection circuits for telecom, industrial, and automotive applications - though final system-level certification remains the responsibility of the end-equipment designer.
SMCJ14A-E3/57T 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 (SMCJ)
SMCJ14A-E3/57T FAQ
1.How can I place an order for SMCJ14A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14A-E3/57T 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-E3/57T reliable?
The price and inventory of SMCJ14A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ14A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14A-E3/57T?
SMCJ14A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14A-E3/57T 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-E3/57T?
For technical support, including SMCJ14A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14A-E3/57T requirements.
6.How does Aetrix verify that SMCJ14A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ14A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ14A-E3/57T?
All SMCJ14A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ14A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14A-E3/57T Tags
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