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Vishay General Semiconductor - Diodes Division SMCJ6.5A-M3/57T
- Part No.:
- SMCJ6.5A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5A-M3/57T.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ6.5A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping ESD and surge transients on power and signal lines. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 1500 W peak pulse power (10/1000 μs), and clamps to ≤11.2 V at 133.9 A peak pulse current - deployed in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the SMCJ6.5A-M3/57T datasheet, SMCJ6.5A-M3/57T pinout, SMCJ6.5A-M3/57T application, or SMCJ6.5A-M3/57T equivalent, this page delivers verified electrical specs, thermal resistance (RθJA = 75 °C/W), polarity marking (cathode band), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification path - critical for automotive-grade design-in and long-term supply assurance.
Technical Context
The SMCJ6.5A-M3/57T operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients. Its clamping behavior is defined by low incremental surge resistance and stable VBR temperature coefficient (0.061 %/°C), ensuring predictable protection across -55 °C to +150 °C junction range.
Mounted on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power under standardized 10/1000 μs waveform while maintaining 6.5 W steady-state power dissipation at TA = 50 °C. The device meets MSL Level 1 (260 °C reflow peak) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum reverse working voltage before clamping begins; sets operating margin above nominal 5 V rail |
| VBR (min/max) | 7.22 V / 7.98 V at IT = 10 mA - defines guaranteed avalanche onset window for design margining |
| VC @ IPPM | ≤11.2 V at 133.9 A - clamping voltage during 1500 W transient; ensures downstream ICs see safe stress levels |
| PPPM | 1500 W (10/1000 μs) - peak surge energy handling capacity for lightning/inductive switch transient immunity |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; determines derating needed for >25 °C ambient operation |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 0.320" body length and cathode band marking |
| Polarity | Unidirectional - cathode identified by molded band; enables DC-biased line protection without reverse conduction |
Pinout & Package
SMCJ6.5A-M3/57T uses the SMC (DO-214AB) package: surface-mount, 2-terminal, rectangular body with cathode band marking on one end. Leads are matte tin-plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; carries full surge current during clamping event |
| Cathode | High-side connection point | Marked by band; connects to protected line (e.g., 5 V rail); blocks reverse leakage below VWM |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial PCB assembly without brominated flame retardants |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced damage |
| Low incremental surge resistance | Enables tighter clamping voltage spread and higher effective surge current handling vs. higher-Rsurge TVS devices |
| AEC-Q101 qualification path | Base P/NHM3_X variant available for automotive applications; confirms reliability under temperature cycling, HTRB, and surge stress |
| Glass passivated junction | Improves long-term stability of VBR and leakage performance under thermal and humidity stress |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 5 V power rails in engine control units (ECUs) and body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between VCC and GND, activated within <1 ns upon overvoltage detection. Use Value: Limits transient voltage to ≤11.2 V during 133.9 A surge, preserving MCU and CAN transceiver functionality under harsh automotive conditions. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA or 0–10 V) from ESD and field wiring surges in factory automation sensors. IC Role / Device Role / Timing Role: Standoff-mode protector on signal path; remains non-conductive below 6.5 V, clamps only during fault events. Use Value: Maintains signal integrity with <1 μA leakage at 6.5 V while absorbing 1500 W transients - preventing false triggers and ADC saturation. |
| Consumer USB Power Input Protection | Telecom DC Feeder Line Protection |
|
Use Scenario: Secondary-level surge suppression on 5 V USB input stages of smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Fast-response clamping diode placed after primary fuse and upstream of LDO regulator. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <12 V, avoiding LDO dropout and system brownout during transient events. |
Use Scenario: Overvoltage protection on -48 V DC feeder lines feeding remote radio units in 4G/5G base stations. IC Role / Device Role / Timing Role: Unidirectional TVS configured anode-to-ground to protect telecom ICs from induced lightning surges. Use Value: Withstands repeated 1500 W surges (10/1000 μs) while maintaining <500 nA leakage at -48 V, ensuring uptime and signal fidelity. |
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-M3/57T | Same VWM/VBR/VC specs but lower PPPM (600 W) and SMB package (smaller footprint, higher RθJA) | Better suited for space-constrained consumer PCBs where 1500 W surge is not required | Select when board area is limited and surge threat level is ≤600 W (e.g., I/O ports, low-energy interfaces) |
| SMCJ6.5CA-M3/57T | Bidirectional version: symmetric VBR (7.22–7.98 V), same PPPM/VC, no polarity marking | Required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY) where reverse polarity transients occur | Choose for bidirectional protection needs; not interchangeable without circuit redesign due to polarity and layout implications |
Compared with SMBJ6.5A-M3/57T, the SMCJ6.5A-M3/57T provides 2.5× higher surge power handling and better thermal performance; versus SMCJ6.5CA-M3/57T, it offers optimized DC rail protection with lower leakage and simpler biasing - making it the preferred choice for unidirectional 5 V power domains.
Availability
SMCJ6.5A-M3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB power inputs, and telecom DC feeder lines requiring stable component supply, halogen-free compliance, and long-lifecycle support.
Supply support for SMCJ6.5A-M3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering robust clamping with validated AEC-Q101 qualification paths and tight parametric consistency.
FAQ
What is the maximum clamping voltage of the SMCJ6.5A-M3/57T under rated surge conditions?
The SMCJ6.5A-M3/57T clamps to a maximum of 11.2 V when subjected to its rated 133.9 A peak pulse current (10/1000 μs waveform). This value is measured at the device terminals under standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads), and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ6.5A-M3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ6.5A-M3/57T suitable for automotive applications?
Yes - the SMCJ6.5A-M3/57T is manufactured with halogen-free, RoHS-compliant materials (M3 suffix) and shares the same die and process as AEC-Q101-qualified variants (e.g., SMCJ6.5A-HM3_X). While the M3 suffix itself denotes commercial-grade qualification, Vishay provides full AEC-Q101 test reports and qualification data for this family, enabling direct use in automotive power and signal protection where customer validation is completed. The SMCJ6.5A-M3/57T supports junction temperatures up to +150 °C.
How does the SMCJ6.5A-M3/57T differ from the bidirectional SMCJ6.5CA-M3/57T?
The SMCJ6.5A-M3/57T is unidirectional with a cathode band marking and specified reverse leakage only; the SMCJ6.5CA-M3/57T is bidirectional with symmetrical breakdown in both directions and no polarity marking. Their VBR, VWM, and VC values are identical, but the SMCJ6.5A-M3/57T exhibits lower reverse leakage (<500 nA at 6.5 V) and is intended for DC-biased lines like 5 V rails. The SMCJ6.5A-M3/57T cannot replace the CA version in AC or floating applications without circuit redesign.
What is the thermal resistance and how does it affect PCB layout for the SMCJ6.5A-M3/57T?
The SMCJ6.5A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). To maintain safe operation at elevated ambient temperatures, designers must ensure adequate copper area and consider derating: for example, at TA = 70 °C, maximum allowable power drops to ~3.6 W. The SMCJ6.5A-M3/57T's thermal performance directly depends on PCB copper mass and airflow - undersized pads increase junction temperature and reduce surge endurance.
Does the SMCJ6.5A-M3/57T meet moisture sensitivity and reflow requirements for automated assembly?
Yes - the SMCJ6.5A-M3/57T meets MSL Level 1 per J-STD-020, allowing unlimited floor life and compatibility with standard lead-free reflow profiles peaking at 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 for solderability, and the molding compound satisfies UL 94 V-0 flammability rating. These attributes make the SMCJ6.5A-M3/57T fully suitable for high-volume SMT production without baking or special handling.
SMCJ6.5A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- 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):
- 133.9A
- 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-M3/57T FAQ
1.How can I place an order for SMCJ6.5A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5A-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ6.5A-M3/57T 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-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ6.5A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5A-M3/57T?
SMCJ6.5A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5A-M3/57T 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-M3/57T?
For technical support, including SMCJ6.5A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5A-M3/57T requirements.
6.How does Aetrix verify that SMCJ6.5A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5A-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ6.5A-M3/57T?
All SMCJ6.5A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5A-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ6.5A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5A-M3/57T Tags
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