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Vishay General Semiconductor - Diodes Division SMB8J6.5CAHM3/I
- Part No.:
- SMB8J6.5CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J6.5CAHM3/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,555
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Product details
Overview
SMB8J6.5CAHM3/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). It is AEC-Q101 qualified and used in automotive sensor interface protection.
For engineers reviewing the SMB8J6.5CAHM3/I datasheet, SMB8J6.5CAHM3/I pinout, SMB8J6.5CAHM3/I application, or SMB8J6.5CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, 11.2 V max clamping at 1000 A, AEC-Q101 qualification, halogen-free RoHS compliance, and SMB package thermal performance with RθJA = 72 °C/W.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to clamp reverse surges symmetrically across both polarities. Its bidirectional architecture enables protection of AC-coupled or floating signal paths without polarity constraints.
It delivers 800 W peak pulse power handling per the 10/1000 µs waveform standard (ANSI/IEEE C62.35), with 71.4 A maximum peak pulse current (IPPM) and low incremental surge resistance - critical for limiting let-through energy into downstream ICs like CAN transceivers or microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe signal swing range. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC @ IPPM | 11.2 V at 71.4 A - Clamped voltage seen by protected circuit during worst-case 10/1000 µs surge; limits stress on 12 V rail interfaces. |
| PPPM | 800 W - Sustains standardized lightning/surge energy (IEC 61000-4-5 Level 4) without failure when mounted on 5 mm × 5 mm copper pads. |
| IPPM | 71.4 A - Peak current handled during 10/1000 µs transient; directly determines protected line's surge immunity margin. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| Qualification | AEC-Q101 - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL level 1 (260 °C reflow peak), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry during positive transient | One terminal of symmetrical avalanche junction; no polarity marking required for bidirectional function. |
| Cathode (unmarked end) | Current entry during negative transient | Second terminal of same junction; identical electrical role - bidirectional conduction eliminates cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC or floating lines (e.g., CAN bus, RS-485) without external polarity management or dual-device placement. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics with extended temperature and lifetime requirements. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on protected ICs - e.g., keeps 12 V CAN transceivers below absolute maximum ratings during ISO 7637-2 pulses. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive OEM environmental mandates and supports lead-free assembly without compromising surge robustness. |
| 72 °C/W junction-to-ambient thermal resistance | Enables effective heat dissipation on standard PCB layouts with 5 mm × 5 mm copper pads, supporting repeated surge events. |
Applications
| Automotive Sensor Interface | CAN Bus Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, or position sensors connected to vehicle ECUs against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and ground, clamping ±200 V transients within nanoseconds. Use Value: Prevents sensor IC latch-up or damage while maintaining signal integrity up to 10 kHz bandwidth due to low junction capacitance (~100 pF at 0 V). | Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1044) on 12 V vehicle networks exposed to ISO 16750-2 and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on CAN_H/CAN_L differential pair, placed adjacent to transceiver pins. Use Value: Limits differential surge voltage to <15 V, preserving transceiver eye diagram integrity and meeting EMC immunity requirements without adding series impedance. |
| Industrial PLC I/O Module | Consumer Appliance Motor Control |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, referenced to common ground, with fast response (<1 ns) to suppress 1 kV EFT bursts. Use Value: Eliminates need for external series resistors or RC filters, reducing BOM count and board space while achieving IEC 61000-4-4 Level 4 compliance. | Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in washing machines or HVAC blowers from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Bidirectional clamp on motor driver output lines, absorbing inductive kickback energy before it reaches MCU pins. Use Value: Prevents MCU reset or port latch-up during repeated motor starts/stops, extending system uptime and eliminating need for software watchdog recovery cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J6.5CAHE3/I | RoHS-compliant but not halogen-free; same VWM, VBR, VC, PPPM, and AEC-Q101 qualification. | Acceptable for commercial-automotive hybrids where halogen content is not restricted by OEM specification. | Select when cost sensitivity outweighs halogen-free requirement and supply chain prioritizes E3-suffix availability. |
| SMAJ6.5CA-M3/5B | Same electrical specs but in smaller SMA (DO-214AC) package; lower PPPM (600 W), higher RθJA (90 °C/W), no AEC-Q101 rating. | Limited to non-automotive industrial or consumer use with lower surge severity and less stringent reliability demands. | Choose only for space-constrained designs where 600 W surge rating suffices and automotive qualification is unnecessary. |
Compared with SMB8J6.5CAHE3/I, the SMB8J6.5CAHM3/I adds halogen-free compliance without sacrificing surge rating or qualification; versus SMAJ6.5CA-M3/5B, it provides 33 % higher power handling, 20 % better thermal performance, and full automotive qualification - making it the sole option for Tier-1 automotive signal-line protection.
Availability
SMB8J6.5CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC I/O modules, and appliance motor control circuits requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J6.5CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade performance.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, bidirectional transient suppression in harsh automotive and industrial environments where voltage surges exceed IEC/ISO standards.
FAQ
What is the clamping voltage of SMB8J6.5CAHM3/I at its rated peak pulse current?
The SMB8J6.5CAHM3/I has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated peak pulse current of 71.4 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during standardized surge events. The SMB8J6.5CAHM3/I maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMB8J6.5CAHM3/I suitable for protecting CAN FD interfaces?
Yes, SMB8J6.5CAHM3/I is suitable for CAN FD interface protection due to its bidirectional operation, 11.2 V clamping voltage, low junction capacitance (~100 pF at 0 V), and AEC-Q101 qualification. Its fast response time (<1 ns) and ability to handle repetitive 800 W surges enable compliance with ISO 11898-2 and ISO 7637-2 test requirements. The SMB8J6.5CAHM3/I is commonly deployed across CAN_H and CAN_L lines in automotive gateway modules and ADAS domain controllers.
How does the HM3 suffix affect the specifications of SMB8J6.5CAHM3/I?
The HM3 suffix on SMB8J6.5CAHM3/I indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD 201 Class 2 whisker resistance. Electrically and thermally, it matches the HE3 variant - same VWM, VBR, VC, PPPM, and AEC-Q101 qualification - but satisfies stricter environmental mandates from automotive OEMs. The SMB8J6.5CAHM3/I retains full compatibility with lead-free reflow profiles (MSL level 1, 260 °C peak).
What is the maximum operating temperature for SMB8J6.5CAHM3/I?
The SMB8J6.5CAHM3/I has a maximum junction temperature (TJ) rating of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. This allows deployment in under-hood automotive locations, industrial motor drives, and other high-ambient environments. Derating curves in the datasheet (Fig. 2) confirm usable surge capacity down to 50 % of rated PPPM at 125 °C ambient when mounted on recommended 5 mm × 5 mm copper pads.
Does SMB8J6.5CAHM3/I require a heatsink for standard surge duty?
No, SMB8J6.5CAHM3/I does not require an external heatsink for standard single-pulse or low-duty-cycle surge conditions. Its thermal resistance (RθJA = 72 °C/W) and 5 mm × 5 mm pad layout provide sufficient dissipation for 800 W 10/1000 µs pulses. However, for repetitive surge events (>1 Hz), PCB copper area should be maximized and thermal vias added beneath the SMB pads. The SMB8J6.5CAHM3/I is validated for such operation per JEDEC JESD22-A108 thermal cycling and JESD22-A103 HTOL testing.
SMB8J6.5CAHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMB8J6.5CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J6.5CAHM3/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/I reliable?
The price and inventory of SMB8J6.5CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMB8J6.5CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J6.5CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J6.5CAHM3/I?
SMB8J6.5CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J6.5CAHM3/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/I?
For technical support, including SMB8J6.5CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J6.5CAHM3/I requirements.
6.How does Aetrix verify that SMB8J6.5CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB8J6.5CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMB8J6.5CAHM3/I?
All SMB8J6.5CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J6.5CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMB8J6.5CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J6.5CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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