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Taiwan Semiconductor Corporation SMCJ6.5
- Part No.:
- SMCJ6.5
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5.pdf
- Description:
- 1500W, 8V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
SMCJ6.5 from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.22V min / 8.82V max breakdown voltage at 6.5mA test current, 10V working stand-off voltage, and 12.3V clamping voltage at 500A peak impulse current. It protects automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ6.5 datasheet, SMCJ6.5 pinout, SMCJ6.5 application, or SMCJ6.5 equivalent, this page delivers verified electrical parameters, thermal performance data, clamping behavior under standardized surge waveforms, and direct alternatives for ESD and inductive switching protection design.
Technical Context
The SMCJ6.5 uses a glass-passivated silicon junction to achieve sub-1.0ps response time from 0V to VBR, enabling effective suppression of fast-rising transients such as EFT and load dump spikes. Its unidirectional configuration provides forward conduction path with 3.5V @ 100A, while maintaining <1μA reverse leakage above 10V.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, supporting sustained operation up to TJ = +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.22V / 8.82V at 6.5mA - defines minimum voltage at which TVS enters avalanche conduction during surge events |
| VWM | 10V - maximum continuous reverse operating voltage before leakage exceeds 6.5μA |
| VC @ IPPM | 12.3V at 500A - clamped voltage seen by protected circuit during 10/1000μs surge waveform |
| PPK | 1500W - peak pulse power handling per single non-repetitive 1ms surge per Fig.5 |
| IFSM | 200A - maximum 8.3ms half-sine forward surge current capability for unidirectional operation |
| TJ max | +150°C - maximum junction temperature for reliable long-term operation under derated conditions |
| RθJA | 55°C/W - thermal resistance from junction to ambient, used to calculate temperature rise under steady-state power dissipation |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; polarity indicated by molded cathode band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during positive surges when cathode is biased higher |
| Cathode | Avalanche clamping terminal | Connected to higher-potential rail (e.g., VBAT); initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and low leakage (<1μA @ >10V), critical for low-power standby circuits |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT), required for automotive ECUs |
| Sub-1.0ps response time | Ensures clamping activation before transient energy couples into downstream ICs, protecting sensitive analog front-ends |
| Moisture sensitivity level 1 | Eliminates need for dry-pack or baking prior to reflow, reducing manufacturing overhead and risk of popcorning |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated end equipment |
Applications
| Automotive Power Rail Protection | Industrial I/O Interface Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between VBAT and ground, activated within <1.0ps upon overvoltage detection. Use Value: Limits voltage to ≤12.3V during 500A transients, preventing damage to MCU power supply and CAN transceivers. | Use Scenario: RS-485 communication port on PLC module subjected to EFT bursts and cable coupling noise. IC Role / Device Role / Timing Role: Standoff protector on differential bus lines, conducting only during >10V common-mode surges. Use Value: Maintains signal integrity by clamping transients before they exceed receiver input absolute maximum ratings. |
| LED Driver Output Protection | DC-DC Converter Input Protection |
Use Scenario: Constant-current LED driver output driving high-side switch in streetlight system with inductive kickback. IC Role / Device Role / Timing Role: Transient absorber across output terminals, shunting inductive energy back to source during MOSFET turn-off. Use Value: Prevents voltage overshoot beyond 12.3V that would otherwise degrade LED string reliability or damage driver FET. | Use Scenario: 24V input stage of isolated DC-DC converter in factory automation controller. IC Role / Device Role / Timing Role: Primary surge limiter on main input rail, absorbing energy from field-wiring transients before reaching primary-side controller. Use Value: Enables robust operation under repeated 1500W pulses without degradation, verified per Fig.2 derating curve. |
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, SMB package (smaller footprint), 11.2V clamping at 200A, tighter VBR tolerance (7.22–7.98V) | Limited to lower-energy transients; suitable for space-constrained consumer electronics, not automotive load dump | Select when board area is constrained and peak surge energy remains below 600W |
| 1.5KE6.8A | Through-hole TO-204AA (DO-41), 1500W, 10.5V clamping at 125A, higher VWM = 5.8V | Requires through-hole assembly; less suitable for automated SMT lines and high-vibration environments | Select only if legacy through-hole design or mechanical robustness outweighs SMT efficiency |
Compared with SMCJ6.5, SMBJ6.5A offers smaller size but reduced surge capacity, while 1.5KE6.8A provides identical power rating in a less automatable package-making SMCJ6.5 optimal for high-volume automotive and industrial SMT production requiring ISO 7637-2 compliance.
Availability
SMCJ6.5 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial I/O interface hardening, and LED driver output safeguarding requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMCJ6.5 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 for industrial, automotive, and computing markets.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial systems, emphasizing ISO 7637-2 compliance, robust thermal performance, and SMT manufacturability.
FAQ
What is the clamping voltage of SMCJ6.5 under standard surge conditions?
The SMCJ6.5 exhibits a maximum clamping voltage (VC) of 12.3V at 500A peak impulse current, measured using the 10/1000μs waveform defined in Fig.5 of the datasheet. This value ensures downstream components see no more than 12.3V during worst-case transients, making SMCJ6.5 suitable for protecting 12V logic and power rails. The clamping performance is guaranteed across the full operating temperature range.
Is SMCJ6.5 unidirectional or bidirectional, and how is polarity identified?
SMCJ6.5 is a unidirectional TVS diode, designed for DC applications where reverse conduction is not required. Polarity is marked by a cathode band on the DO-214AB (SMC) package body; the banded end connects to the higher-potential node (e.g., VBAT), while the anode connects toward ground or lower-voltage return. Bidirectional variants use "CA" suffix (e.g., SMCJ6.5CA).
Does SMCJ6.5 meet automotive transient immunity standards?
Yes, SMCJ6.5 meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (electrical fast transients), as explicitly stated in its features list. Its 1500W peak power rating and 12.3V clamping at 500A enable compliance with these test levels when properly mounted with low-inductance layout practices.
What is the maximum steady-state power dissipation for SMCJ6.5?
The SMCJ6.5 has a steady-state power dissipation (PD) rating of 5W at TA = 25°C, as specified in Absolute Maximum Ratings. This value applies only to continuous DC or low-frequency reverse bias conditions-not surge events. Derating is required above 25°C ambient, following the curve in Fig.2 of the datasheet.
Can SMCJ6.5 be used in place of SMCJ6.5A, and what is the key difference?
No, SMCJ6.5 and SMCJ6.5A are not interchangeable without design review. SMCJ6.5A has tighter VBR tolerance (7.22–7.98V vs. 7.22–8.82V), lower clamping voltage (11.2V vs. 12.3V at 500A), and is optimized for applications requiring stricter voltage control. Substituting SMCJ6.5 for SMCJ6.5A may result in higher clamped voltage and reduced protection margin in precision-sensitive circuits.
SMCJ6.5 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:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 128A
- 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)
SMCJ6.5 FAQ
1.How can I place an order for SMCJ6.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5 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 SMCJ6.5 reliable?
The price and inventory of SMCJ6.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5 is usually 5 days.
3.What payment methods are accepted for SMCJ6.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5?
SMCJ6.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5 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 SMCJ6.5?
For technical support, including SMCJ6.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5 requirements.
6.How does Aetrix verify that SMCJ6.5 is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5 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 SMCJ6.5 meets industry standards.
7.What is the process for return or replacement of SMCJ6.5?
All SMCJ6.5 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5, 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 SMCJ6.5 part is unused and in its original packaging.
Return procedure for SMCJ6.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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