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Vishay General Semiconductor - Diodes Division SMB8J6.5CAHM3_A/I
- Part No.:
- SMB8J6.5CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J6.5CAHM3_A/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,391
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Product details
Overview
SMB8J6.5CAHM3_A/I 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, and 800 W peak pulse power (10/1000 µs waveform), with AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J6.5CAHM3_A/I datasheet, SMB8J6.5CAHM3_A/I pinout, SMB8J6.5CAHM3_A/I application, or SMB8J6.5CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.72), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and suitability for CAN bus, sensor I/O, and automotive body control module protection.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream circuitry. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints, and its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance across temperature.
The SMB8J6.5CAHM3_A/I is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 72 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, supporting reliable operation in under-hood automotive environments. Its 1000 A peak pulse current rating (10/1000 µs) and low incremental surge resistance enable effective suppression of ISO 7637-2 Pulse 1, 2a, and 5a transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V logic or CAN-H/L lines. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 11.2 V at 1000 A - Clamping voltage under full-rated surge; limits protected IC voltage stress to ≤11.2 V during worst-case transients. |
| PPPM | 800 W (10/1000 µs) - Peak pulse power handling capacity; supports robust protection against automotive load-dump and inductive switching events. |
| IPPM | 1000 A - Peak surge current capability; meets ISO 16750-2 Level IV (1000 A, 10/1000 µs) for power line protection. |
| TJ max | +150 °C - Maximum junction temperature; enables placement near heat sources in engine control units and ADAS modules. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); polarity unmarked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional polarity - either terminal serves as cathode or anode depending on transient polarity; no color band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or differential interfaces (e.g., CAN, LIN, RS-485) without external polarity management. |
| AEC-Q101 qualified | Validated for automotive electronics including powertrain, chassis, and body control modules per stress test requirements. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles; no baking required prior to assembly. |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage (<1.0 µA), and long-term reliability under thermal cycling. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices. |
Applications
| Automotive CAN Bus Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting CAN-H/CAN-L differential pair from ISO 7637-2 Pulse 3b (capacitive coupling) and load dump-induced surges in vehicle networking. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to limit transient excursions to <11.2 V. Use Value: Prevents CAN transceiver latch-up or damage while maintaining signal integrity up to 1 Mbps due to low junction capacitance (~100 pF at 0 V). |
Use Scenario: Safeguarding 5 V or 12 V power rails feeding microcontrollers and analog sensors in under-hood ECUs exposed to battery reversal and alternator load dump. IC Role / Device Role / Timing Role: Primary surge shunt on main input rail, coordinated with upstream fuse and downstream L-C filtering. Use Value: Absorbs 800 W transient energy without failure, enabling compliance with ISO 16750-2 Level IV and extending system MTBF. |
| Automotive Body Control Module (BCM) I/O | Industrial Sensor Signal Conditioning |
Use Scenario: Protecting GPIO, LIN bus, and switch inputs in BCMs from ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from relay coils. IC Role / Device Role / Timing Role: Localized TVS at each I/O pin, mounted within 2 mm of connector entry point. Use Value: Limits ESD-induced voltage overshoot to ≤11.2 V, preventing latch-up in 3.3 V/5 V MCU I/O cells and ensuring ASIL-B functional safety compliance. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) and digital sensor interfaces (I²C, SPI) in industrial PLC modules from field wiring transients. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) clamping element placed between sensor output and isolation barrier or ADC input. Use Value: Maintains signal accuracy during normal operation while suppressing >1 kV surges-critical for precision measurement systems requiring <0.1% error budget. |
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/I | Same electrical specs, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses standard tin plating instead of whisker-tested matte tin. | Lacks automotive qualification; suitable for industrial or consumer applications where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and MSL Level 1 is sufficient. |
| SMAJ6.5CA-M3/5B | Lower power rating (400 W vs. 800 W), SMA package (smaller footprint, higher RθJA = 95 °C/W), same VWM/VC values. | Not suitable for high-energy automotive transients; limited to lower-power signal lines or non-automotive industrial use. | Choose only for space-constrained designs with <400 W surge exposure and no AEC-Q101 requirement. |
Compared with SMB8J6.5CAHE3_A/I and SMAJ6.5CA-M3/5B, the SMB8J6.5CAHM3_A/I uniquely combines AEC-Q101 qualification, 800 W surge capacity, and MSL Level 1 compatibility-making it the only option among the three validated for under-hood automotive power and data line protection.
Availability
SMB8J6.5CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and CAN/LIN bus protection requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMB8J6.5CAHM3_A/I 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 high-reliability and automotive-grade solutions.
The SMB8J6.5CAHM3_A/I belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for robust transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J6.5CAHM3_A/I at its rated peak pulse current?
The SMB8J6.5CAHM3_A/I has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated peak pulse current of 1000 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88422. The low clamping ratio (VC/VWM = 1.72) ensures minimal overvoltage stress on protected circuitry during surge events. This performance is consistent across the full operating temperature range of -55 °C to +150 °C.
Is SMB8J6.5CAHM3_A/I suitable for automotive applications?
Yes, SMB8J6.5CAHM3_A/I is explicitly AEC-Q101 qualified, as stated in the Vishay datasheet (Document Number 88422, revision 09-Jan-2024). Its qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD47. The "HM3" suffix denotes halogen-free, RoHS-compliant construction with whisker-tested matte tin leads, and the "_A/I" ordering code indicates 13-inch tape-and-reel packaging. These attributes make SMB8J6.5CAHM3_A/I appropriate for under-hood and cabin automotive modules including ECUs, BCMs, and ADAS sensors.
What does the "HM3" suffix mean in SMB8J6.5CAHM3_A/I?
The "HM3" suffix in SMB8J6.5CAHM3_A/I indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance requirements. It also signifies AEC-Q101 qualification-distinguishing it from the "HE3" (RoHS-compliant, AEC-Q101) and "E3/M3" (commercial-grade) variants. The "HM3" designation ensures compliance with automotive material restrictions and process reliability standards, particularly for high-vibration, high-temperature environments where lead integrity is critical. This suffix is defined in Vishay's ordering information table on page 3 of document 88422.
How does SMB8J6.5CAHM3_A/I differ from unidirectional TVS diodes like SMB10J6.5A?
SMB8J6.5CAHM3_A/I is bidirectional, while SMB10J6.5A is unidirectional. This means SMB8J6.5CAHM3_A/I protects both polarities of a signal line-essential for AC-coupled or differential interfaces like CAN or LIN-whereas SMB10J6.5A only clamps positive transients relative to ground. Additionally, SMB8J6.5CAHM3_A/I delivers 800 W peak pulse power (10/1000 µs) and 1000 A IPPM, whereas SMB10J6.5A offers 1000 W but is unsuitable for bidirectional use. Their packages differ too: SMB8J uses an 8 A rating base, SMB10J a 10 A base-reflected in thermal resistance and surge endurance.
What is the maximum reverse leakage current for SMB8J6.5CAHM3_A/I at its stand-off voltage?
The maximum reverse leakage current (ID) for SMB8J6.5CAHM3_A/I is 1.0 µA at its stand-off voltage (VWM) of 6.5 V, as specified in the bidirectional electrical characteristics table (page 3, document 88422). This low leakage ensures minimal power loss and signal distortion in always-powered circuits such as automotive always-on domains or industrial 4–20 mA loops. The value is guaranteed at TA = 25 °C and remains stable across temperature due to the device's glass-passivated junction structure.
SMB8J6.5CAHM3_A/I 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/I FAQ
1.How can I place an order for SMB8J6.5CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J6.5CAHM3_A/I 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/I reliable?
The price and inventory of SMB8J6.5CAHM3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMB8J6.5CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J6.5CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J6.5CAHM3_A/I?
SMB8J6.5CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J6.5CAHM3_A/I 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/I?
For technical support, including SMB8J6.5CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J6.5CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J6.5CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J6.5CAHM3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMB8J6.5CAHM3_A/I?
All SMB8J6.5CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J6.5CAHM3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMB8J6.5CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J6.5CAHM3_A/I Tags
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