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Taiwan Semiconductor Corporation SMCJ14CAH
- Part No.:
- SMCJ14CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ14CAH.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,617
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Product details
Overview
SMCJ14CAH from Taiwan Semiconductor is a bidirectional 1500W 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 to protect automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ14CAH datasheet, SMCJ14CAH pinout, SMCJ14CAH application, or SMCJ14CAH equivalent, key selection criteria include clamping performance under 10/1000μs surge, AEC-Q101 qualification status, bidirectional polarity marking, and thermal derating behavior above 25°C ambient.
Technical Context
The SMCJ14CAH uses a glass-passivated junction for stable breakdown characteristics and low leakage (<1μA at 14V), enabling reliable ESD and load-switching transient suppression in harsh environments. Its bidirectional configuration supports symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
With a junction-to-case thermal resistance of 10°C/W and 150°C max junction temperature, the device sustains repetitive surge events when mounted on thermally adequate PCB copper. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements per its DO-214AB molding compound.
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 @ 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on margin |
| 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 1ms transient |
| IR @ VWM | <1 μA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - Enables operation in under-hood automotive or high-ambient industrial environments |
| Package | DO-214AB (SMC) - Surface-mount outline with 2.54 mm lead pitch and 0.210 g mass |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; SMCJ14CAH is bidirectional and marked with polarity-indifferent coding (GEK), so terminals are non-polarized and function identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals serve as interchangeable surge current entry/exit points - no polarity dependency in layout |
| Case | Thermal interface | Exposed metal slug not electrically connected; used for heatsinking via PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| ISO 7637-2 compliance | Guaranteed clamping performance against standardized vehicle electrical transients (Pulse 1, 2a, 2b, 3a, 3b) |
| Fast response time | <1.0 ps rise time from 0 V to VBR min - ensures sub-nanosecond turn-on before sensitive ICs experience overvoltage |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow - compatible with standard SMT assembly lines |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life compliance |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs (e.g., body control modules) from load dump and alternator switching spikes. IC Role / Device Role / Timing Role: Primary bidirectional TVS clamp placed upstream of DC-DC converters and CAN transceivers. Use Value: Limits transient voltage to ≤23.2 V during 67 A surges, preventing latch-up or gate oxide damage in downstream MOSFETs and microcontrollers. | Use Scenario: Shielding 24V digital input channels in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Front-end transient absorber on isolated input optocoupler or digital isolator supply rails. Use Value: Maintains <1 μA leakage at 24V nominal, avoiding false triggering while clamping fast-rising transients within 1 ps. |
| Telecom Base Station Power | Consumer Appliance Motor Control |
Use Scenario: Safeguarding 48V DC power inputs in remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS after primary MOV/GDT stages, providing precise low-clamp protection for DC-DC front ends. Use Value: Delivers 1500 W peak power dissipation with 10°C/W RθJC, enabling compact thermal design without forced air cooling. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Bidirectional clamp across motor terminals or H-bridge supply rails to absorb back-EMF energy. Use Value: Withstands 200 A IFSM surge and operates from −55°C to +150°C, supporting wide ambient temperature ranges in sealed enclosures. |
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 | 600 W PPK rating, same VWM/VBR/VC but lower surge capacity; DO-214AA (SMB) package | Lower power handling limits use to sub-30A surge environments; unsuitable for ISO 7637-2 Pulse 5a load dump | Select SMBJ14CA only where board space is constrained and peak surge current remains below 30 A. |
| 1.5KE14CA | 1500 W PPK, axial-leaded DO-201AD package; higher RθJA (75°C/W), slower response (~1 ps vs. <1 ps) | Not surface-mountable; requires through-hole assembly and larger PCB real estate; less suitable for automated high-volume production | Choose 1.5KE14CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ14CA and 1.5KE14CA, the SMCJ14CAH delivers superior surge robustness in SMT form factor, tighter clamping (23.2 V vs. ≥24.4 V), and AEC-Q101 qualification - making it the preferred choice for automotive and high-reliability industrial deployments.
Availability
SMCJ14CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ14CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for automotive and industrial markets.
The SMCJ series was developed specifically for AEC-Q101-compliant transient protection in 12V/24V/48V automotive and industrial power systems, emphasizing low clamping voltage, high surge robustness, and SMT manufacturability.
FAQ
What does the 'CAH' suffix indicate in SMCJ14CAH?
The 'CAH' suffix in SMCJ14CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability construction (H). Unlike unidirectional 'CH' variants, SMCJ14CAH provides symmetrical clamping in both polarities - critical for protecting AC-coupled interfaces or floating grounds. This designation is confirmed in TSC's ordering documentation and electrical specifications table.
Is SMCJ14CAH compliant with ISO 7637-2, and which pulses does it cover?
Yes, SMCJ14CAH meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply line inductance), Pulse 3a (capacitive discharge), and Pulse 3b (capacitive discharge with line impedance). This compliance is explicitly stated in the FEATURES section of the official TSC datasheet and verified by clamping performance data at rated IPPM.
What is the maximum clamping voltage of SMCJ14CAH, and under what test condition is it specified?
The maximum clamping voltage of SMCJ14CAH is 23.2 V, measured at 67 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential waveform per Fig.5 in the TSC datasheet. This value represents worst-case voltage seen by downstream circuitry during a full-rated surge event and is guaranteed across the operating temperature range.
Does SMCJ14CAH require special handling for moisture sensitivity?
No - SMCJ14CAH has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions without baking or floor-life restrictions. This enables direct placement into standard reflow soldering processes without pre-bake steps, reducing manufacturing complexity and cost in high-volume SMT lines.
How does the thermal performance of SMCJ14CAH compare to similar TVS diodes in DO-214AB packages?
SMCJ14CAH achieves a junction-to-case thermal resistance (RθJC) of 10°C/W - among the lowest in its class - due to optimized die attach and internal thermal path design. This allows sustained surge duty cycles without thermal runaway, outperforming many competing DO-214AB TVS diodes that specify RθJC >12°C/W, especially critical in enclosed automotive or industrial enclosures.
SMCJ14CAH 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:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 67A
- 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)
SMCJ14CAH FAQ
1.How can I place an order for SMCJ14CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ14CAH 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 SMCJ14CAH reliable?
The price and inventory of SMCJ14CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ14CAH is usually 5 days.
3.What payment methods are accepted for SMCJ14CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ14CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ14CAH?
SMCJ14CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ14CAH 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 SMCJ14CAH?
For technical support, including SMCJ14CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ14CAH requirements.
6.How does Aetrix verify that SMCJ14CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ14CAH 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 SMCJ14CAH meets industry standards.
7.What is the process for return or replacement of SMCJ14CAH?
All SMCJ14CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ14CAH, 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 SMCJ14CAH part is unused and in its original packaging.
Return procedure for SMCJ14CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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