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Taiwan Semiconductor Corporation SMCJ14CH
- Part No.:
- SMCJ14CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CH.pdf
- Description:
- 1500W, 17.4V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,170
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Product details
Overview
SMCJ14CH 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), 15.6–19.1V breakdown voltage (VBR), and 25.8V maximum clamping voltage (VC) at 61A peak pulse current - designed to protect automotive power lines and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ14CH datasheet, SMCJ14CH pinout, SMCJ14CH application, or SMCJ14CH equivalent, this device delivers AEC-Q101 qualification, sub-1ps response time, <1μA reverse leakage above 10V, and bidirectional surge immunity - critical for ESD-hardened CAN/LIN bus nodes, motor control inputs, and 12V rail protection in harsh environments.
Technical Context
The SMCJ14CH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional configurations. Its clamping behavior follows the 10/1000μs waveform per R.E.A., with thermal resistance of 55°C/W (junction-to-ambient) and 10°C/W (junction-to-case), enabling sustained operation up to +150°C junction temperature.
It meets ISO 7637-2 for automotive load-dump and inductive-switching immunity, and supports unidirectional/bidirectional use via CH (bidirectional) or H (unidirectional) suffixes. Polarity is marked by cathode band on unidirectional variants only; SMCJ14CH has symmetrical terminals with no polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system nominal 12V rail. |
| VBR min/max | 15.6 V / 19.1 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 25.8 V @ 61 A - Clamping voltage limits downstream IC stress during 10/1000μs surges; stays within 2× VWM for robust protection. |
| PPK | 1500 W - Peak pulse power rating defines single-event surge handling capability under standardized test conditions. |
| IR @ VWM | <1 μA - Ultra-low leakage preserves battery life and avoids false triggering in always-on circuits. |
| TJ max | +150 °C - Enables deployment in under-hood automotive locations and high-temperature industrial enclosures. |
| RθJA | 55 °C/W - Thermal performance allows ~27W steady-state dissipation at TA = 25°C; derates linearly above ambient. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1 (per J-STD-020), weight ≈0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional TVS terminal pair | No polarity marking; terminals interchangeable - enables placement across AC lines or differential buses without orientation check. |
| Cathode band (N/A) | Not applicable | SMCJ14CH is bidirectional; no cathode marking required - eliminates assembly errors in dual-rail or floating-ground applications. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, body electronics, and ADAS modules. |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - covers full automotive transient immunity standard. |
| Sub-1 ps response time | Typically <1.0 ps from 0 V to VBR min - faster than most microcontroller I/O response times, ensuring clamping occurs before sensitive logic is damaged. |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift over temperature and lifetime - critical for 15+ year automotive service life. |
| DO-214AB mechanical robustness | UL 94V-0 molding compound and JESD201 Class 2 whisker resistance support automated reflow and high-reliability field deployment. |
Applications
| Automotive Power Line Protection | Industrial I/O Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and sensor supply lines in vehicle door modules against battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between VBAT and GND, shunting transients before they reach 5V/3.3V LDOs or LIN PHYs. Use Value: Limits voltage excursion to ≤25.8V during 100A/10ms pulses, preventing latch-up or gate oxide damage in downstream ASICs. |
Use Scenario: Shielding PLC analog input channels (0–10V, 4–20mA) from ESD events and field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted directly at connector entry point, ahead of signal conditioning op-amps and ADCs. Use Value: Withstands ≥10kV contact ESD (IEC 61000-4-2) and 2kV ring wave (IEC 61000-4-12), preserving measurement accuracy and calibration integrity. |
| Motor Control Board Input Protection | DC Power Rail Surge Suppression |
|
Use Scenario: Safeguarding gate drivers and current-sense amplifiers on BLDC motor control boards exposed to back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC-link capacitor terminals to clamp inductive kickback from MOSFET switching. Use Value: 1500W peak power rating absorbs repetitive 61A/10/1000μs pulses without degradation, extending board MTBF in HVAC and power tools. |
Use Scenario: Securing 12V auxiliary power rails in telecom base station power supplies against lightning-induced surges entering via AC mains or PoE injectors. IC Role / Device Role / Timing Role: Secondary-level clamping device downstream of MOV-based primary protection, providing precise low-clamp voltage for sensitive DC-DC controllers. Use Value: 25.8V VC ensures downstream buck converters remain within absolute maximum ratings even during worst-case 1.5kV/0.5μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA | Lower PPK (600W), SMB package (smaller footprint), higher VC (23.2V @ 38.9A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or high-current load dump. | Select when space-constrained PCB layout prioritizes size over surge margin, and transient energy is ≤600W. |
| 1.5KE14CA | Through-hole TO-218 package, same 14V VWM, but higher VC (25.8V @ 58.1A) and slower response (>1ns) | Requires manual soldering; not AEC-Q101 qualified; lacks ISO 7637-2 validation. | Choose only for legacy through-hole designs where rework cost exceeds redesign, and automotive qualification is not required. |
Compared with SMBJ14CA and 1.5KE14CA, the SMCJ14CH provides 2.5× higher peak power handling, AEC-Q101 certification, and verified ISO 7637-2 compliance - making it the preferred choice for new automotive and industrial designs demanding robust, surface-mount surge immunity.
Availability
SMCJ14CH is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O protection, and motor control systems requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant surge suppression.
Supply support for SMCJ14CH 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, and rectifiers, with global distribution and AEC-Q101 process validation capabilities.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing fast response, low clamping, and long-term reliability under thermal and mechanical stress.
FAQ
What is the polarity configuration of SMCJ14CH?
The SMCJ14CH is a bidirectional TVS diode with symmetrical terminals and no cathode marking. Unlike unidirectional variants (e.g., SMCJ14H), it conducts equally in both directions - ideal for AC-coupled lines, differential buses, or floating-ground protection where polarity cannot be guaranteed during layout or service.
Does SMCJ14CH meet AEC-Q101 requirements?
Yes, SMCJ14CH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This includes stress testing for temperature cycling, high-temperature operating life, and mechanical shock - confirming suitability for automotive powertrain, chassis, and body electronics applications where reliability is mission-critical.
What is the maximum clamping voltage for SMCJ14CH under surge conditions?
The maximum clamping voltage (VC) for SMCJ14CH is 25.8 V at 61 A peak pulse current (IPPM), measured using the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components remain within safe voltage limits during transient events.
Can SMCJ14CH replace SMCJ14AH in an existing design?
No - SMCJ14CH and SMCJ14AH are functionally distinct. SMCJ14CH is bidirectional with symmetrical terminals; SMCJ14AH is unidirectional with cathode marking and different electrical specs (VBR min = 15.6 V, VC = 23.2 V). Substitution requires layout review and verification of polarity and clamping behavior in the target circuit.
What packaging and reel quantity is offered for SMCJ14CH?
SMCJ14CH is supplied in DO-214AB (SMC) package on tape-and-reel format, with 3,000 units per reel. The tape meets EIA-481 standards, and the reels are compatible with standard SMT pick-and-place equipment - supporting high-volume automated assembly without modification.
SMCJ14CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 61A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ14CH FAQ
1.How can I place an order for SMCJ14CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CH 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 SMCJ14CH reliable?
The price and inventory of SMCJ14CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CH is usually 5 days.
3.What payment methods are accepted for SMCJ14CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CH?
SMCJ14CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CH 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 SMCJ14CH?
For technical support, including SMCJ14CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CH requirements.
6.How does Aetrix verify that SMCJ14CH is sourced from the original manufacturer or authorized distributors?
All SMCJ14CH 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 SMCJ14CH meets industry standards.
7.What is the process for return or replacement of SMCJ14CH?
All SMCJ14CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CH, 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 SMCJ14CH part is unused and in its original packaging.
Return procedure for SMCJ14CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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