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Vishay General Semiconductor - Diodes Division SMCJ6.5-E3/9AT
- Part No.:
- SMCJ6.5-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5-E3/9AT.pdf
- Description:
- TVS DIODE 6.5VWM 12.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,806
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Product details
Overview
SMCJ6.5-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 6.5 V stand-off voltage (VWM), 11.2 V clamping voltage (VC) at 133.9 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ6.5-E3/9AT datasheet, SMCJ6.5-E3/9AT pinout, SMCJ6.5-E3/9AT application, or SMCJ6.5-E3/9AT equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and thermal resistance (RθJA = 75 °C/W) under standard 8.0 mm × 8.0 mm copper pad layout.
Technical Context
This TVS diode operates as a clamping-type surge protector, leveraging an avalanche breakdown mechanism to limit transient voltages above its 7.22–7.98 V breakdown range (VBR at 10 mA). Its low incremental surge resistance ensures minimal voltage overshoot during fast transients such as ISO 7637-2 load dump or ESD events.
Designed for surface-mount automated placement, it uses glass-passivated junction technology and meets UL 94 V-0 flammability rating. The cathode band marking confirms unidirectional polarity, and its 150 °C maximum junction temperature supports operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - guaranteed avalanche onset range for reliable turn-on threshold |
| VC @ IPPM | 11.2 V at 133.9 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak surge power handling capability with 10/1000 µs waveform |
| ID @ VWM | 500 µA - low leakage current at stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - enables use in high-temperature automotive and industrial enclosures |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8.0 mm × 8.0 mm copper pads |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile, bi-directional-capable outline with cathode band marking for unidirectional polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail); conducts when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning |
| Matte tin plated leads | Ensures solderability per J-STD-002 and JESD22-B102, with JESD201 Class 1A whisker resistance |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation material required for safety-critical automotive and industrial applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Clamping transient energy away from MCU VDD pin within nanoseconds of overvoltage onset. Use Value: Limits peak voltage to ≤11.2 V during 133.9 A surges, preventing latch-up or permanent damage to 5 V-tolerant I/O cells. | Use Scenario: Safeguarding analog outputs of pressure sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: Shunting induced EFT bursts (IEC 61000-4-4) on 4–20 mA current loop wiring. Use Value: Withstands repetitive 1500 W pulses while maintaining <500 µA leakage at 6.5 V, preserving signal accuracy. |
| Consumer Device USB Port Protection | Telecom Base Station DC Feed Protection |
Use Scenario: Guarding USB VBUS lines in portable docking stations against hot-plug induced transients. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping device placed upstream of USB power switch ICs. Use Value: Clamps to 11.2 V before downstream 5.5 V-rated switches exceed absolute maximum ratings. | Use Scenario: Protecting -48 V DC feed lines in remote radio heads from lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC feed and RF front-end bias circuitry. Use Value: Handles 1500 W surges while maintaining stable 6.5 V standoff, enabling reliable bias rail operation during field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (~110 °C/W) | Suitable only for lower-energy transients; not recommended for automotive load dump | Select SMCJ6.5-E3/9AT when 1500 W surge immunity and AEC-Q101 compliance are mandatory |
| 1.5SMC6.5A | Same DO-214AB package and 1500 W rating, but non-AEC-Q101, commercial-grade only | Lacks automotive qualification; limited to industrial/commercial environments with less stringent reliability requirements | Choose SMCJ6.5-E3/9AT where automotive qualification, traceable sourcing, and extended temperature validation are required |
Compared with SMAJ6.5A-E3/61T and 1.5SMC6.5A, the SMCJ6.5-E3/9AT delivers identical clamping performance with certified AEC-Q101 reliability and optimized thermal dissipation - making it the preferred choice for mission-critical automotive and industrial surge protection where failure modes must be rigorously controlled.
Availability
SMCJ6.5-E3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, consumer docking station power management, and telecom base station DC feed systems requiring stable component supply across multi-year production cycles.
Supply support for SMCJ6.5-E3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against ISO 7637, IEC 61000-4-5, and lightning-induced surges is essential.
FAQ
What is the clamping voltage of the SMCJ6.5-E3/9AT under maximum rated surge current?
The SMCJ6.5-E3/9AT has a maximum clamping voltage (VC) of 11.2 V when subjected to its peak pulse current (IPPM) of 133.9 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream components see no more than 11.2 V during worst-case transients - critical for protecting 5 V or 3.3 V logic interfaces. The SMCJ6.5-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ6.5-E3/9AT qualified for automotive applications?
Yes, the SMCJ6.5-E3/9AT is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22. Its DO-214AB package, matte tin terminations, and MSL Level 1 rating support automotive PCB assembly. The SMCJ6.5-E3/9AT is explicitly listed in Vishay's AEC-Q101 qualified product matrix and is widely used in engine control modules and body electronics.
What does the "E3/9AT" suffix indicate in SMCJ6.5-E3/9AT?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with JESD201 Class 1A whisker resistance; "9AT" specifies packaging in 13-inch plastic tape and reel with a base quantity of 3500 units. This differs from "57T" (7-inch reel, 850 units) and "HE3" (AEC-Q101 qualified version). The SMCJ6.5-E3/9AT is not AEC-Q101 qualified - that designation requires the "HE3" suffix.
How does the SMCJ6.5-E3/9AT differ from the bi-directional SMCJ6.5CA variant?
The SMCJ6.5-E3/9AT is unidirectional, with a cathode band marking and forward voltage drop (~3.5 V at 100 A), intended for DC line protection where polarity is fixed. In contrast, SMCJ6.5CA is bi-directional, lacks polarity marking, and clamps symmetrically in both directions - suited for AC lines or differential signal pairs. Their VBR, VWM, and VC values differ slightly; the SMCJ6.5-E3/9AT cannot substitute for SMCJ6.5CA without circuit redesign.
What is the thermal resistance and recommended pad layout for optimal performance of the SMCJ6.5-E3/9AT?
The SMCJ6.5-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal, as defined in Vishay's datasheet Figure 2. Deviating from this layout increases thermal impedance, risking junction overheating during repeated surges. The SMCJ6.5-E3/9AT must be placed with adequate copper area and avoid thermal isolation to sustain its 150 °C TJ max rating.
SMCJ6.5-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 122A
- 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 (SMCJ)
SMCJ6.5-E3/9AT FAQ
1.How can I place an order for SMCJ6.5-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCJ6.5-E3/9AT 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-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ6.5-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5-E3/9AT?
SMCJ6.5-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5-E3/9AT 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-E3/9AT?
For technical support, including SMCJ6.5-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5-E3/9AT requirements.
6.How does Aetrix verify that SMCJ6.5-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ6.5-E3/9AT?
All SMCJ6.5-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ6.5-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5-E3/9AT Tags
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