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Taiwan Semiconductor Corporation SMCJ14CA
- Part No.:
- SMCJ14CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CA.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:12,220
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Product details
Overview
SMCJ14CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 14V working stand-off voltage (VWM), 15.6–17.2V breakdown voltage (VBR), and 23.2V maximum clamping voltage (VC) at 67A peak pulse current - designed for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the SMCJ14CA datasheet, SMCJ14CA pinout, SMCJ14CA application, or SMCJ14CA equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, bidirectional surge handling up to 1500W, thermal resistance (RθJC = 10°C/W), and compliance with JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements.
Technical Context
The SMCJ14CA implements a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise time from 0V to VBR min) and low leakage (<1μA at VWM). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
Rated for 150°C junction temperature and -55°C to +150°C storage, it supports high-reliability industrial and automotive applications where repetitive surge immunity per ISO 7637-2 and electrical fast transient (EFT) robustness are required - with thermal derating applied above 25°C ambient per Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 15.6 V / 17.2 V @ IT = 1 mA - verified breakdown threshold ensuring predictable turn-on during transients |
| VC @ IPPM | 23.2 V @ 67 A - clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 1500 W - peak pulse power handling capability per single non-repetitive 1ms event |
| IR @ VWM | <1 μA - negligible leakage current preserving signal integrity and standby power |
| RθJC | 10 °C/W - enables efficient heat transfer from junction to case under sustained surge conditions |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case meeting UL 94V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 solderability; polarity indicated by cathode band (bidirectional operation renders band non-functional but retained for marking consistency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Transient return path (bidirectional) | Provides symmetrical conduction in both polarities - no functional distinction between terminals |
| Cathode (Opposite Band) | Transient return path (bidirectional) | Electrically identical to anode; device operates identically regardless of orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level load dump and inductive switching immunity without external filtering |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and risk of popcorning |
| Halogen-free (IEC 61249-2-21) | Meets environmental regulations for end-of-life disposal and flame retardancy without brominated compounds |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontroller power inputs. Use Value: Limits rail voltage to ≤23.2V during 1500W surges, preventing overvoltage damage to downstream LDOs and PMICs. | Use Scenario: Shielding 4–20mA analog sensor outputs from ESD events and cable-induced transients in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or single-ended output line. Use Value: Clamps ±23.2V spikes within <1ps, preserving signal fidelity and avoiding latch-up in precision ADC front-ends. |
| LED Driver Surge Suppression | Communication Port EFT Hardening |
Use Scenario: Safeguarding constant-current LED drivers in streetlight systems exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Parallel-connected TVS across bridge rectifier output or driver IC supply pins. Use Value: Absorbs 1500W pulses without degradation, maintaining luminance stability and extending driver lifetime. | Use Scenario: Enhancing immunity of RS-485/RS-232 ports to electrical fast transients (IEC 61000-4-4) in building control networks. IC Role / Device Role / Timing Role: Bidirectional clamping device installed at connector entry point before transceiver IC. Use Value: Reduces port failure rate by limiting coupled transients to safe levels below transceiver absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA (Bourns) | Same VWM/VBR/VC specs; lower PPK (600W); SMB package (smaller footprint, higher RθJA) | Not suitable for 1500W ISO 7637-2 Pulse 5a; limited to lower-energy ESD/EFT scenarios | Select when board space is constrained and surge energy is ≤600W |
| P6SMB14CA (Littelfuse) | Identical VWM/VBR/VC; same 1500W rating; DO-214AA (SMB) package; slightly higher IR (≤5μA) | Compatible for most SMCJ14CA use cases but requires PCB pad revision due to smaller body and lead spacing | Choose when leveraging existing SMB footprint designs or sourcing diversification is prioritized |
Compared with SMBJ14CA and P6SMB14CA, the SMCJ14CA delivers identical clamping performance at full 1500W with superior thermal dissipation (RθJC = 10°C/W vs. ~15°C/W for SMB variants), making it preferred for high-ambient or high-duty-cycle surge environments.
Availability
SMCJ14CA is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, LED lighting controls, and communication interface protection requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ14CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - with global distribution and AEC-Q101 qualified product lines.
The SMCJ series is engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness under ISO 7637-2, thermal stability, and halogen-free compliance.
FAQ
What is the maximum clamping voltage of the SMCJ14CA under standard test conditions?
The SMCJ14CA has a maximum clamping voltage (VC) of 23.2 V when subjected to a 10/1000 μs surge waveform at 67 A peak pulse current (IPPM), as specified in the Taiwan Semiconductor datasheet Version S2104. This value ensures downstream circuitry remains within safe operating limits during high-energy transients.
Is the SMCJ14CA unidirectional or bidirectional, and how does that affect PCB layout?
The SMCJ14CA is a bidirectional TVS diode, indicated by the "CA" suffix. Its terminals are functionally identical - no polarity sensitivity exists, and the cathode band marking is retained for consistency only. PCB layout requires no orientation constraint, simplifying placement and enabling flexible routing in AC or floating signal paths.
Does the SMCJ14CA meet automotive transient immunity standards such as ISO 7637-2?
Yes, the SMCJ14CA is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test waveforms per the Taiwan Semiconductor datasheet. It is not rated for Pulse 5a (load dump), which requires higher energy handling - for that, the 1500W rating must be combined with appropriate system-level design including upstream impedance.
What is the junction-to-case thermal resistance (RθJC) of the SMCJ14CA, and why does it matter?
The SMCJ14CA has a junction-to-case thermal resistance (RθJC) of 10°C/W. This low value enables efficient heat transfer from the silicon junction to the PCB copper pour or heatsink, critical for sustaining repeated surge events without thermal runaway - especially important in enclosed or high-ambient-temperature automotive modules.
Can the SMCJ14CA replace the SMCJ14A in an existing design?
No - the SMCJ14CA is bidirectional while the SMCJ14A is unidirectional. Substituting SMCJ14CA for SMCJ14A introduces conduction in reverse bias, potentially disrupting DC biasing or causing unintended current paths. Always verify circuit topology: use SMCJ14CA only where symmetrical clamping is required and reverse leakage paths are acceptable.
SMCJ14CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ14CA FAQ
1.How can I place an order for SMCJ14CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CA 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 reliable?
The price and inventory of SMCJ14CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CA is usually 5 days.
3.What payment methods are accepted for SMCJ14CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CA?
SMCJ14CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CA 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?
For technical support, including SMCJ14CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CA requirements.
6.How does Aetrix verify that SMCJ14CA is sourced from the original manufacturer or authorized distributors?
All SMCJ14CA 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 meets industry standards.
7.What is the process for return or replacement of SMCJ14CA?
All SMCJ14CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CA, 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 part is unused and in its original packaging.
Return procedure for SMCJ14CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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