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Taiwan Semiconductor Corporation SMCJ6.5A
- Part No.:
- SMCJ6.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,536
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Product details
Overview
SMCJ6.5A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.22V min / 7.98V max breakdown voltage at 10mA, 10V working stand-off voltage, and 11.2V clamping voltage at 500A peak pulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ6.5A datasheet, SMCJ6.5A pinout, SMCJ6.5A application, or SMCJ6.5A equivalent, this page delivers verified electrical parameters, thermal performance data, polarity marking details, and direct alternatives for ESD and inductive switching surge protection in 12V automotive systems.
Technical Context
The SMCJ6.5A operates as a unidirectional avalanche diode with glass-passivated junction, delivering sub-1ps response time from 0V to VBR min. Its 11.2V clamping voltage at 500A ensures robust overvoltage suppression on 10V nominal circuits without compromising downstream IC survival.
Rated for 150°C junction temperature and meeting JESD201 Class 2 whisker resistance, it supports high-reliability mounting in automotive engine control units and industrial PLC I/O modules where moisture sensitivity level 1 (per J-STD-020) and UL 94V-0 molding compound are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=10mA | 7.22–7.98V: Ensures reliable avalanche conduction onset above 10V system rail while avoiding false triggering during normal operation. |
| VWM | 10V: Matches standard 12V automotive supply derated for ripple and tolerance; blocks leakage below clamp threshold. |
| VC @ IPPM=500A | 11.2V: Limits transient overshoot to safe margin for 12V-rated microcontrollers and CAN transceivers. |
| IPPM | 500A: Withstands severe load-dump and inductive switch-off surges per ISO 7637-2 Pulse 5a/b without degradation. |
| PPK | 1500W: Delivers high-energy absorption capability in compact DO-214AB footprint for space-constrained PCBs. |
| RθJA | 55°C/W: Enables thermal design for continuous operation up to +85°C ambient with minimal copper area. |
| IR @ VWM | <6.5µA: Minimizes standby power loss in always-on vehicle subsystems such as body control modules. |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; defines clamping reference for unidirectional operation. |
| Cathode | Protected line input | Connected to 10V rail; conducts avalanche current during positive transients to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - critical for automotive ECU qualification. |
| Sub-1ps response time | Activates before most microcontroller I/O pins can be damaged by fast-rising EFT or lightning-induced surges. |
| Glass-passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling in under-hood environments. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity. |
| UL 94V-0 molding compound | Prevents flame propagation in high-power density modules exposed to mechanical stress or overtemperature events. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects 12V supply rail of BCM microcontroller from load-dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping positive overvoltage spikes to 11.2V while blocking reverse leakage below 6.5µA. Use Value: Prevents reset or latch-up of Infineon AURIX™ TC3xx MCU during ISO 7637-2 Pulse 5a (35V/100ms) events. | Use Scenario: Shields 24V digital input circuitry from inductive kickback when solenoid valves de-energize. IC Role / Device Role / Timing Role: Fast-response avalanche device limiting transient voltage to ≤11.2V at 500A peak, preserving optocoupler isolation integrity. Use Value: Extends mean time between failures (MTBF) of Siemens SIMATIC S7-1200 DI modules operating in factory automation environments. |
| LED Headlamp Driver Unit | Automotive CAN Transceiver Protection |
Use Scenario: Guards buck converter input stage against battery reverse-polarity connection and jump-start surges. IC Role / Device Role / Timing Role: Clamps 10V rail to 11.2V during 200A/10ms pulses, enabling TI LM5122 controller to maintain regulation. Use Value: Avoids catastrophic failure of Cree XP-L2 LEDs subjected to >150V transients during cold-cranking conditions. | Use Scenario: Provides secondary-level protection on CAN_H/CAN_L lines upstream of standalone transceivers like NXP TJA1042. IC Role / Device Role / Timing Role: Unidirectional clamping element referenced to ground, suppressing common-mode surges without distorting differential signaling. Use Value: Maintains CAN FD communication integrity at 5Mbps during ISO 16750-2 transient tests up to ±25V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5A | 600W rating, same VBR/VC, SMB package (smaller footprint, lower thermal mass) | Limited to lower-energy transients; unsuitable for full ISO 7637-2 Pulse 5a compliance | Select when board space is constrained and peak surge energy remains below 600W. |
| 1.5SMC6.5A | Same 1500W rating and DO-214AB package, but from ON Semiconductor; VC=11.2V identical, VBR range 7.22–7.98V matches exactly | Drop-in replacement with identical thermal and electrical behavior; qualified for same automotive standards | Preferred for dual-sourcing programs requiring second-source validation without layout change. |
Compared with SMCJ6.5A, SMBJ6.5A offers smaller size but reduced surge handling, while 1.5SMC6.5A provides identical performance and direct manufacturability across multiple supply chains - making it ideal for high-volume automotive production with BOM continuity requirements.
Availability
SMCJ6.5A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection, LED driver surge immunity, and CAN bus interface hardening requiring stable component supply across extended temperature ranges and high-reliability qualification.
Supply support for SMCJ6.5A 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 MOSFETs for automotive and industrial markets.
The SMCJ series was designed specifically for high-energy transient suppression in 12V/24V automotive power networks, meeting stringent ISO 7637-2 and ISO 16750-2 requirements with validated thermal and mechanical robustness.
FAQ
What is the maximum clamping voltage of the SMCJ6.5A under specified test conditions?
The SMCJ6.5A has a maximum clamping voltage (VC) of 11.2V when subjected to a 500A peak pulse current (IPPM) with a 10/1000μs waveform. This value is measured per Fig.5 in the datasheet and ensures that protected circuits remain within safe operating limits during high-energy transients. The SMCJ6.5A maintains this clamping performance consistently across its rated junction temperature range of –55°C to +150°C.
Is the SMCJ6.5A suitable for bidirectional transient protection?
No, the SMCJ6.5A is a unidirectional TVS diode intended only for positive-going transients on grounded systems. For bidirectional protection, Taiwan Semiconductor specifies the SMCJ6.5CA variant, which features symmetrical breakdown in both directions. Using SMCJ6.5A in a bidirectional configuration risks failure during negative transients, as it lacks reverse avalanche capability. Always verify polarity marking and circuit topology before deployment of SMCJ6.5A.
Does the SMCJ6.5A meet automotive qualification standards such as AEC-Q101?
The SMCJ6.5A is engineered to meet ISO 7637-2 (Pulse 1/2a/2b/3a/3b) and ISO 16750-2 transient immunity requirements commonly found in automotive applications, but Taiwan Semiconductor does not list AEC-Q101 qualification for this specific part number in its official documentation. Customers requiring formal AEC-Q101 certification should consult TSC's qualified product list or consider the 1.5SMC6.5A from ON Semiconductor, which carries AEC-Q101 qualification.
What is the thermal resistance from junction to ambient (RθJA) for the SMCJ6.5A in standard PCB layout?
The SMCJ6.5A has a typical junction-to-ambient thermal resistance (RθJA) of 55°C/W when mounted on a standard FR-4 PCB with minimum recommended copper pad area per the DO-214AB footprint. This value assumes no additional thermal vias or heatsinking. For higher ambient temperatures or sustained power dissipation, designers must apply derating per Fig.2 in the datasheet and may need enhanced copper pour or thermal vias to maintain TJ ≤ 150°C.
How does the SMCJ6.5A compare to the SMCJ6.0A in terms of clamping performance and application suitability?
The SMCJ6.5A clamps at 11.2V (500A), while the SMCJ6.0A clamps at 10.3V (500A); both share identical 1500W peak power rating and DO-214AB package. The higher VBR of SMCJ6.5A (7.22–7.98V vs. 6.67–7.37V) makes it better suited for 12V systems with wider tolerance margins, whereas SMCJ6.0A fits tighter 10V rails. Neither part is interchangeable without verifying system-level overvoltage margin and transient energy profile for SMCJ6.5A.
SMCJ6.5A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 140A
- 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)
SMCJ6.5A FAQ
1.How can I place an order for SMCJ6.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5A 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 SMCJ6.5A reliable?
The price and inventory of SMCJ6.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5A is usually 5 days.
3.What payment methods are accepted for SMCJ6.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5A?
SMCJ6.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5A 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 SMCJ6.5A?
For technical support, including SMCJ6.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5A requirements.
6.How does Aetrix verify that SMCJ6.5A is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5A 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 SMCJ6.5A meets industry standards.
7.What is the process for return or replacement of SMCJ6.5A?
All SMCJ6.5A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5A, 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 SMCJ6.5A part is unused and in its original packaging.
Return procedure for SMCJ6.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5A Tags
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