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Taiwan Semiconductor Corporation SMCJ12CAH
- Part No.:
- SMCJ12CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12CAH.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,065
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Product details
Overview
SMCJ12CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 12V working stand-off voltage (VWM), 13.3–14.7V breakdown voltage (VBR), and 19.9V maximum clamping voltage (VC) at 79A 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 SMCJ12CAH datasheet, SMCJ12CAH pinout, SMCJ12CAH application, or SMCJ12CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, sub-1ps response time, <1µA leakage above 10V, and compliance with IEC 61249-2-21 halogen-free requirements.
Technical Context
The SMCJ12CAH is a glass-passivated, single-die, bidirectional TVS diode optimized for high-energy surge suppression in automotive and industrial environments. It meets ISO 7637-2 test pulses including load dump (Pulse 2b), supply interruption (Pulse 3b), and coupled transients (Pulse 1/2a/3a), with junction temperature range of –55°C to +150°C and thermal resistance RθJC = 10°C/W.
Its fast response (<1.0ps from 0V to VBR min) enables effective protection of downstream ICs during ESD and lightning-induced surges. The device exhibits symmetric electrical characteristics in both directions due to its bipolar construction, and features matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 13.3 V / 14.7 V @ IT = 1 mA - Ensures reliable turn-on within defined tolerance band under standardized test conditions |
| VC @ IPPM | 19.9 V @ 79 A - Clamped voltage seen by protected circuit during 10/1000µs surge, limiting stress on downstream components |
| PPK | 1500 W - Peak pulse power handling per single 1ms transient, derated above 25°C ambient |
| IR @ VWM | <1 µA - Minimal leakage current ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - Enables operation in under-hood automotive and high-temperature industrial enclosures |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 0.210g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: surface-mount, molded plastic case with cathode band marking for unidirectional variants; SMCJ12CAH is bidirectional and marked with "GEE" code - no polarity marking required as terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient energy - no orientation dependency during PCB placement |
| Case (body) | Thermal conduction path | Provides mechanical mounting and heat dissipation via copper pad; RθJA = 55°C/W in standard JEDEC layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, critical for harsh-environment deployment |
| ISO 7637-2 compliance | Guarantees robustness against real-world vehicle electrical disturbances including load dump and battery reversal transients |
| Sub-1ps response time | Enables clamping before sensitive logic or analog circuitry experiences overvoltage damage during fast-rising ESD events |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - supports environmentally compliant manufacturing and end-of-life recycling |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, body control modules, and lighting drivers from load dump and alternator transients. IC Role / Device Role: Primary clamping element placed at board-level input filter stage, upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤19.9V during 79A ISO 7637-2 Pulse 2b events, preventing latch-up or gate oxide damage in downstream MOSFETs and regulators. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to inductive kickback from solenoids and contactors. IC Role / Device Role: Bidirectional shunt protector across isolated input terminals, absorbing ±1kV/500A transients per IEC 61000-4-5. Use Value: Maintains signal integrity by clamping surges within 1ps while drawing <1µA leakage at 12V nominal - no impact on input threshold detection. |
| Telecom Power Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding PoE-powered Ethernet switches and base station power supplies from lightning-induced surges on AC/DC front-ends. IC Role / Device Role: Secondary-level TVS placed after primary MOVs and before DC-DC regulation stages. Use Value: Provides precise 19.9V clamping with tight VBR tolerance (13.3–14.7V), enabling smaller buffer margins than generic 15V TVS devices. | Use Scenario: Protecting BLDC motor driver ICs in washing machines and HVAC systems from back-EMF spikes during commutation. IC Role / Device Role: Bidirectional clamp across half-bridge leg supply rails, suppressing voltage overshoot during fast switching transitions. Use Value: Withstands repetitive 1500W surges without degradation, supporting >100,000-cycle motor lifetime under worst-case load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | 600W peak power rating, same VWM/VBR/VC specs but lower IPPM (35.2A vs 79A) | Suitable for lower-energy transients; not recommended for ISO 7637-2 Pulse 2b or high-current load dump | Select SMCJ12CAH when system-level surge tests require ≥1500W immunity - SMBJ12CA lacks margin for automotive Grade A compliance. |
| 1.5KE12CA | Through-hole DO-201 package, 1500W rating, identical VWM/VBR/VC but higher RθJA (75°C/W) and slower response (~1ps still valid) | Requires PCB through-hole real estate and reflow-compatible lead finish; less suitable for automated SMT lines | Choose SMCJ12CAH for surface-mount scalability, AEC-Q101 validation, and tighter thermal performance in space-constrained designs. |
Compared with SMBJ12CA and 1.5KE12CA, the SMCJ12CAH delivers superior surge robustness in compact SMT form factor with automotive-qualified reliability - making it optimal for next-generation ADAS power domains and industrial edge controllers where footprint, thermal efficiency, and certification rigor are non-negotiable.
Availability
SMCJ12CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power interfaces requiring stable component supply, full traceability, and lifecycle continuity assurance.
Supply support for SMCJ12CAH 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 - headquartered in Hsinchu Science Park with global distribution and AEC-Q101-certified production lines.
The SMCJ series is part of TSC's automotive-grade transient suppression portfolio, engineered specifically for ISO 7637-2-compliant protection in 12V/24V vehicle architectures and ruggedized industrial power systems.
FAQ
What is the clamping voltage of SMCJ12CAH at its rated peak pulse current?
The SMCJ12CAH has a maximum clamping voltage (VC) of 19.9 V at 79 A peak pulse current (IPPM), measured under the 10/1000 µs waveform per Fig.5 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream ICs remain within safe operating voltage ranges.
Is SMCJ12CAH suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the SMCJ12CAH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD verification - confirming suitability for under-hood and chassis-mounted automotive modules subject to extended thermal and vibration exposure.
How does the bidirectional configuration of SMCJ12CAH affect PCB layout compared to unidirectional TVS diodes?
The SMCJ12CAH's bidirectional design eliminates polarity constraints during placement - either terminal may connect to the line being protected, removing need for orientation verification in automated assembly. Unlike unidirectional variants (e.g., SMCJ12H), no cathode band marking is present, simplifying layout and reducing risk of misplacement-induced failure.
What is the maximum steady-state power dissipation (PD) for SMCJ12CAH at 25°C ambient?
The SMCJ12CAH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency reverse-bias conditions - transient suppression relies on the 1500W peak pulse rating, not PD, and must be evaluated using thermal derating curves (Fig.2) for elevated ambient temperatures.
Does SMCJ12CAH meet halogen-free and RoHS requirements?
Yes, the SMCJ12CAH complies with both RoHS Directive 2011/65/EU and IEC 61249-2-21 halogen-free standards. The molding compound contains no brominated flame retardants or chlorine-based additives, and all terminations use matte tin plating - satisfying environmental compliance mandates for consumer, industrial, and automotive end equipment.
SMCJ12CAH 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 79A
- 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)
SMCJ12CAH FAQ
1.How can I place an order for SMCJ12CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12CAH 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 SMCJ12CAH reliable?
The price and inventory of SMCJ12CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ12CAH is usually 5 days.
3.What payment methods are accepted for SMCJ12CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12CAH?
SMCJ12CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12CAH 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 SMCJ12CAH?
For technical support, including SMCJ12CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12CAH requirements.
6.How does Aetrix verify that SMCJ12CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ12CAH 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 SMCJ12CAH meets industry standards.
7.What is the process for return or replacement of SMCJ12CAH?
All SMCJ12CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12CAH, 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 SMCJ12CAH part is unused and in its original packaging.
Return procedure for SMCJ12CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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