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Vishay General Semiconductor - Diodes Division SMB8J6.5CAHM3_A/H
- Part No.:
- SMB8J6.5CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J6.5CAHM3_A/H.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,268
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Product details
Overview
SMB8J6.5CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V clamping voltage (VC) at 1000 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMB8J6.5CAHM3_A/H datasheet, SMB8J6.5CAHM3_A/H pinout, SMB8J6.5CAHM3_A/H application, or SMB8J6.5CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive transients. Its bidirectional architecture enables symmetric suppression of positive and negative voltage spikes without polarity sensitivity-critical for AC-coupled or differential signal lines.
Rated for -55 °C to +150 °C operating junction temperature and qualified per AEC-Q101, SMB8J6.5CAHM3_A/H supports automotive-grade reliability with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below breakdown. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 11.2 V at 1000 A - Clamping voltage during full-rated 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 800 W - Peak pulse power handling capacity with 10/1000 µs waveform; determines survivability against lightning-induced surges. |
| TJ max. | +150 °C - Maximum junction temperature rating enables operation in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.20 mm × 3.94 mm footprint; optimized for high-density PCB layouts and reflow compatibility. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces. |
Pinout & Package
SMB8J6.5CAHM3_A/H is housed in an SMB (DO-214AA) surface-mount package with two terminals: cathode and anode. As a bidirectional device, it has no polarity marking; both terminals are functionally symmetric for AC transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | AC input terminal | Accepts either polarity of transient; forms symmetrical clamping path with cathode during overvoltage events. |
| Cathode | AC input terminal | Paired with anode to provide bidirectional conduction; no color band or marking required per spec. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., CAN, RS-485), and ungrounded sensor outputs without polarity concerns. |
| AEC-Q101 qualification | Validates robustness for automotive electronics including powertrain, body control, and ADAS modules subjected to harsh thermal and vibration profiles. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| Low-profile SMB package | 0.086" height (2.20 mm) supports compact designs in space-constrained modules such as ECU daughterboards and camera control units. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow processing at peak temperatures up to 260 °C without baking preconditioning. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamps ±200 V transients to <12 V within nanoseconds, preserving ADC input integrity and preventing latch-up in signal conditioning ICs. Use Value: Eliminates need for separate unidirectional devices on dual-rail sensor outputs while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in industrial gateways subjected to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Symmetric clamping limits differential voltage swing to <22.4 V (2 × VC), ensuring CAN transceiver remains within common-mode tolerance and bit error rate stays below 10⁻¹². Use Value: Prevents bus lockup during 4 kV ESD contact discharge per IEC 61000-4-2 without degrading signal rise/fall times. |
| Consumer USB-C Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Shielding USB-C CC and VCONN pins from hot-plug transients and electrostatic discharge in portable docking stations. IC Role / Device Role / Timing Role: Fast-response TVS shunts >15 kV HBM ESD events away from USB PD controllers and level shifters before damage occurs. Use Value: Maintains USB-IF certification by limiting clamped voltage to 11.2 V-well below 20 V absolute maximum ratings of common PD ICs. |
Use Scenario: Front-end surge suppression on POTS line interface cards handling ADSL/VDSL signals in telecom central offices. IC Role / Device Role / Timing Role: Absorbs 10/700 µs lightning surges up to 4 kV (open-circuit) while holding line voltage below 25 V to protect SLIC and codec ICs. Use Value: Achieves ITU-T K.20/K.21 compliance with single-device solution, reducing BOM count versus discrete MOV+TVS stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J6.5CAHE3_A/H | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free; lacks AEC-Q101 qualification. | Approved for industrial and consumer equipment only-not certified for automotive deployment. | Select when halogen-free content or automotive qualification is not required; lower cost alternative for non-automotive designs. |
| SMAJ6.5CA-M3 | Smaller SMA (DO-214AC) package; same VWM/VBR/VC but lower PPPM (400 W) and IPPM (32.8 A). | Suitable for lower-energy transients; insufficient for ISO 7637-2 Pulse 5a load dump protection. | Choose for space-constrained consumer boards where surge energy is limited to <200 W; verify thermal derating on 0.1" × 0.1" pads. |
Compared with SMB8J6.5CAHM3_A/H, SMB8J6.5CAHE3_A/H offers identical performance without halogen-free or automotive validation, while SMAJ6.5CA-M3 trades package size for reduced surge capacity-making the original optimal for AEC-Q101-compliant, high-power automotive and industrial interfaces.
Availability
SMB8J6.5CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial CAN networks, and telecom line cards requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SMB8J6.5CAHM3_A/H 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 optimization.
SMB8J6.5CAHM3_A/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes engineered for robust transient immunity in automotive, industrial, and communications infrastructure-where failure due to voltage surges is unacceptable.
FAQ
What is the clamping voltage of SMB8J6.5CAHM3_A/H at its rated peak pulse current?
The SMB8J6.5CAHM3_A/H exhibits a maximum clamping voltage (VC) of 11.2 V when subjected to its rated 1000 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures downstream circuitry remains protected below critical voltage thresholds. The SMB8J6.5CAHM3_A/H maintains this clamping performance across its qualified temperature range of -55 °C to +150 °C.
Is SMB8J6.5CAHM3_A/H suitable for automotive applications?
Yes, SMB8J6.5CAHM3_A/H is AEC-Q101 qualified and specifically designed for automotive use. Its halogen-free (HM3) construction, MSL Level 1 rating, and validated performance across -55 °C to +150 °C junction temperature make it appropriate for engine control units, ADAS camera modules, and body electronics. The SMB8J6.5CAHM3_A/H meets requirements for ISO 7637-2 transient immunity and is commonly deployed on LIN, CAN, and sensor signal lines in production vehicles.
How does the bidirectional configuration of SMB8J6.5CAHM3_A/H affect its circuit implementation?
The bidirectional configuration of SMB8J6.5CAHM3_A/H allows it to suppress voltage transients of either polarity across a single device-eliminating the need for back-to-back unidirectional TVS diodes. This simplifies layout on differential lines like CAN, RS-485, or USB-C, reduces component count, and avoids polarity marking errors during assembly. The SMB8J6.5CAHM3_A/H achieves symmetrical clamping with identical VBR and VC characteristics in both directions, verified per the Vishay datasheet revision 09-Jan-2024.
What is the thermal resistance of SMB8J6.5CAHM3_A/H, and how does it impact PCB layout?
SMB8J6.5CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per the Vishay datasheet; reducing pad area increases RθJA and risks thermal runaway during repeated surges. To maintain reliability, designers must adhere to the specified mounting pad dimensions and ensure adequate copper pour around both terminals for SMB8J6.5CAHM3_A/H.
Does SMB8J6.5CAHM3_A/H require special handling or packaging considerations?
No special handling beyond standard ESD-safe practices is required for SMB8J6.5CAHM3_A/H. Its MSL Level 1 rating permits indefinite exposure to ambient humidity and standard reflow profiles up to 260 °C peak temperature without pre-baking. The device ships in 7" or 13" plastic tape-and-reel formats (package codes H or I), with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The SMB8J6.5CAHM3_A/H is compatible with automated pick-and-place systems and standard lead-free reflow processes.
SMB8J6.5CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 71.4A
- Power - Peak Pulse:
- 800W
- 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-214AA (SMB)
SMB8J6.5CAHM3_A/H FAQ
1.How can I place an order for SMB8J6.5CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J6.5CAHM3_A/H 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 SMB8J6.5CAHM3_A/H reliable?
The price and inventory of SMB8J6.5CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J6.5CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J6.5CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J6.5CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J6.5CAHM3_A/H?
SMB8J6.5CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J6.5CAHM3_A/H 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 SMB8J6.5CAHM3_A/H?
For technical support, including SMB8J6.5CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J6.5CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J6.5CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J6.5CAHM3_A/H 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 SMB8J6.5CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J6.5CAHM3_A/H?
All SMB8J6.5CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J6.5CAHM3_A/H, 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 SMB8J6.5CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J6.5CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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