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Vishay General Semiconductor - Diodes Division SMCJ14CA-M3/9AT
- Part No.:
- SMCJ14CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CA-M3/9AT.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,433
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Product details
Overview
SMCJ14CA-M3/9AT from Vishay General Semiconductor is a bidirectional 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), 23.2 V clamping voltage (VC) at 64.7 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ14CA-M3/9AT datasheet, SMCJ14CA-M3/9AT pinout, SMCJ14CA-M3/9AT application, or SMCJ14CA-M3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility (via HM3 suffix), and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 14 V), but triggers into low-impedance conduction when transient voltage exceeds its 15.6–17.2 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable parametric performance across temperature.
The device uses a planar silicon avalanche structure optimized for fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.45), and repeatable surge handling per IEC 61000-4-5. Bidirectional symmetry means identical electrical characteristics in both polarities-no polarity marking on the case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets upper limit for protected circuit's nominal rail. |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - Confirmed breakdown threshold range; defines onset of clamping action with tight tolerance. |
| VC @ IPPM | 23.2 V at 64.7 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against severe transients like ISO 7637-2 Pulse 1/2/5a. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with IPC-7351B density Level C. |
Pinout & Package
SMCJ14CA-M3/9AT uses a 2-terminal SMC (DO-214AB) package with no polarity marking (bidirectional configuration). Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive surges and anode during negative surges; symmetrical conduction enables AC/DC line protection without orientation constraints. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode terminal; no functional distinction-device has no marked polarity per datasheet Note "no marking on bidirectional types". |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-enables single-device protection of differential buses (e.g., CAN, RS-485) without polarity concerns. |
| Low clamping ratio | VC/VBR ≈ 1.45 - Minimizes overvoltage overshoot during surge events, reducing risk of latch-up or gate oxide damage in protected MOSFETs or microcontrollers. |
| AEC-Q101 readiness | M3 suffix denotes halogen-free, RoHS-compliant construction; full AEC-Q101 qualification achieved with HM3 ordering code-supports automotive-grade supply chain traceability. |
| Automated placement support | Low-profile SMC package with defined lead coplanarity and J-STD-020 MSL Level 1 rating-enables high-yield reflow assembly at peak temperatures up to 260 °C. |
| High surge robustness | 1500 W peak pulse power with 10/1000 µs waveform - Withstands repeated exposure to ISO 16750-2 load dump spikes and IEC 61000-4-5 combination wave surges. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) and digital sensor inputs (e.g., Hall-effect, RTD) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground, clamping transients within nanoseconds to prevent damage to ADC front-ends or GPIO pins. Use Value: Maintains signal integrity by limiting voltage excursions to ≤23.2 V during 64.7 A surges-well below typical 30 V absolute maximum ratings of automotive-grade op-amps and microcontrollers. | Use Scenario: Safeguarding programmable logic controller (PLC) digital input modules connected to field devices (e.g., proximity switches, solenoids) subject to long cable runs and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional clamp installed across input terminals to divert surge energy away from optocoupler input stages and upstream conditioning circuitry. Use Value: Eliminates need for separate unidirectional devices on each polarity; symmetric response ensures consistent protection regardless of transient polarity-critical for AC-coupled or floating inputs. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
Use Scenario: Guarding +12 V or +24 V DC power distribution networks in telecom base station equipment against lightning-induced surges entering via external ports. IC Role / Device Role / Timing Role: Primary-level TVS placed at board edge, upstream of DC-DC converters and LDOs, absorbing bulk surge energy before it propagates into sensitive subsystems. Use Value: 1500 W rating allows absorption of multi-kA induced currents per IEC 61000-4-5; low Rsurge prevents excessive VC rise during high-current events. | Use Scenario: Secondary-level protection for USB 2.0 data lines (D+/D−) and VBUS in portable consumer devices exposed to human-body-model (HBM) and IEC 61000-4-2 contact ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS integrated near connector to clamp ±8 kV ESD strikes while preserving signal integrity up to 480 Mbps. Use Value: Though not specified in this datasheet, SMCJ-series devices exhibit typical junction capacitance <100 pF at 0 V bias-sufficient for USB 2.0 compliance when combined with proper layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC14-0150-012 | Unidirectional; 14 V VWM, 23.1 V VC at 65 A; same SMC package; lower leakage (0.5 µA max) | Requires correct polarity orientation; unsuitable for AC or differential signals without additional components | Select when protecting DC-only rails where polarity is fixed and ultra-low leakage is prioritized. |
| 1.5KE14CA | Through-hole DO-201 package; identical 14 V VWM and bidirectional behavior; 1500 W rating; higher RθJA (100 °C/W) | Not suitable for high-density SMT designs; requires PCB real estate and wave-solder process | Choose for legacy through-hole systems or prototyping where manual assembly is acceptable and thermal margin permits. |
Compared with SAC14-0150-012 and 1.5KE14CA, the SMCJ14CA-M3/9AT delivers identical clamping performance in a surface-mount package optimized for automotive and industrial volume production, with halogen-free construction and AEC-Q101 upgrade path-making it the preferred choice for new SMT-based designs requiring reliability and scalability.
Availability
SMCJ14CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification readiness.
Supply support for SMCJ14CA-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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including under-hood automotive, factory automation, and outdoor telecom infrastructure-where robustness and repeatable clamping are non-negotiable.
FAQ
What is the breakdown voltage range of the SMCJ14CA-M3/9AT?
The SMCJ14CA-M3/9AT has a guaranteed breakdown voltage (VBR) range of 15.6 V to 17.2 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures reliable triggering above the 14 V standoff voltage while maintaining margin below typical 18–20 V system overvoltage thresholds. The value is confirmed in the Vishay datasheet Document Number 88394, Revision 09-Jan-2024.
Is the SMCJ14CA-M3/9AT suitable for automotive applications?
Yes-the SMCJ14CA-M3/9AT carries the M3 suffix indicating halogen-free, RoHS-compliant construction, and is eligible for AEC-Q101 qualification when ordered with the HM3 suffix (e.g., SMCJ14CA-HM3/9AT). Its 150 °C maximum junction temperature, robust surge capability (1500 W), and glass-passivated junction make it appropriate for engine control units, body electronics, and ADAS sensor modules where transient immunity and thermal resilience are critical. The SMCJ14CA-M3/9AT itself is commercial-grade but forms the baseline for qualified variants.
How does the bidirectional design of the SMCJ14CA-M3/9AT affect PCB layout?
The SMCJ14CA-M3/9AT has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation constraint-unlike unidirectional TVS diodes that mandate cathode alignment. This simplifies placement, reduces assembly errors, and enables use on AC-coupled or floating signal paths (e.g., CAN bus, RS-485) without external diode pairing. Layout must still follow Vishay's recommended 8.0 mm × 8.0 mm copper pad per terminal to ensure rated 1500 W surge handling for the SMCJ14CA-M3/9AT.
What is the clamping voltage of the SMCJ14CA-M3/9AT under maximum surge conditions?
The SMCJ14CA-M3/9AT clamps to a maximum of 23.2 V when subjected to its rated peak pulse current of 64.7 A (10/1000 µs waveform), as verified in the Electrical Characteristics table of the Vishay datasheet. This clamping voltage represents the worst-case voltage seen by downstream components during surge events and is critical for ensuring compatibility with 24 V system ICs having 28–30 V absolute maximum ratings. The value is measured with the device mounted on 8 mm × 8 mm copper pads, per JEDEC standards.
Does the SMCJ14CA-M3/9AT require a heatsink for standard operation?
No-the SMCJ14CA-M3/9AT is designed for surface-mount operation without external heatsinking under typical conditions. Its thermal resistance (RθJA) is 75 °C/W when mounted on minimum recommended 8 mm × 8 mm copper pads, allowing safe dissipation of its 6.5 W steady-state power rating at ambient temperatures up to +70 °C. Heatsinking is unnecessary unless operating continuously near PD limits or in high-temperature enclosures exceeding 85 °C ambient-scenarios where derating curves in Figure 2 of the SMCJ14CA-M3/9AT datasheet must be applied.
SMCJ14CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ14CA-M3/9AT FAQ
1.How can I place an order for SMCJ14CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CA-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 SMCJ14CA-M3/9AT reliable?
The price and inventory of SMCJ14CA-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 SMCJ14CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ14CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CA-M3/9AT?
SMCJ14CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CA-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 SMCJ14CA-M3/9AT?
For technical support, including SMCJ14CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ14CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ14CA-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 SMCJ14CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ14CA-M3/9AT?
All SMCJ14CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CA-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 SMCJ14CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ14CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ14CA-M3/9AT Tags
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