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Vishay General Semiconductor - Diodes Division SMB8J6.5CAHE3/5B
- Part No.:
- SMB8J6.5CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J6.5CAHE3/5B.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,245
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Product details
Overview
SMB8J6.5CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 6.5 V stand-off voltage, 11.2 V clamping voltage at 1000 A peak pulse current, and 800 W peak pulse power rating under 10/1000 μs waveform - deployed in automotive sensor signal lines and power rail protection.
For engineers reviewing the SMB8J6.5CAHE3/5B datasheet, SMB8J6.5CAHE3/5B pinout, SMB8J6.5CAHE3/5B application, or SMB8J6.5CAHE3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data, junction capacitance behavior, and real-world design implications for ESD and load-switching transient suppression.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 7.22–7.98 V breakdown voltage range at 10 mA test current ensures precise triggering above normal operating voltage while maintaining tight VBR tolerance.
Designed per ANSI/IEEE C62.35 standards, it delivers 11.2 V clamping at 1000 A IPPM under 10/1000 μs waveform, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W - enabling reliable operation up to +150 °C junction temperature in compact PCB layouts with 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for protected circuit's nominal voltage. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - defines guaranteed breakdown threshold window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 11.2 V at 1000 A - clamping voltage during worst-case 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 800 W - peak pulse power handling capability; supports robust protection against ISO 7637-2 Pulse 1/2a/5a transients in automotive systems. |
| IPPM | 1000 A - peak surge current capacity under standardized waveform; validates suitability for high-energy inductive switching events. |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments without derating at full power. |
| RθJA | 72 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs board-level thermal design for sustained surge duty cycles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Surge current entry point (negative polarity) | Accepts transient energy during negative voltage excursions; connects to protected line or ground return path. |
| Cathode (Terminal 2) | Surge current entry point (positive polarity) | Accepts transient energy during positive voltage excursions; forms symmetrical conduction path with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Eliminates moisture sensitivity and improves long-term stability of VBR and leakage performance over lifetime. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking - reduces manufacturing complexity and cost. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation material - meets flame-retardancy requirements for automotive and industrial safety certifications. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive CMOS interfaces. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between signal line and chassis ground, absorbing energy before it reaches the transceiver input stage. Use Value: Limits voltage seen by protected IC to ≤11.2 V during 1000 A surges, preventing latch-up or gate oxide damage in automotive-grade interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation cabinets. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across 24 V DC input terminals, shunting surge current away from optocoupler input stages. Use Value: Maintains functional integrity during repeated 800 W surges without degradation, supporting >100,000 switching cycles per IEC 61000-4-5 compliance testing. |
| Telecom Power Rail Clamping | Consumer USB Port ESD Suppression |
Use Scenario: Secondary-side overvoltage protection on 48 V PoE-powered equipment front-end rails subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response clamp installed between VOUT and GND on DC/DC converter output, limiting transient overshoot after line fault clearance. Use Value: Clamps 10/1000 μs surges to 11.2 V within <1 ns, preserving downstream PMIC and Ethernet PHY functionality during field deployment. | Use Scenario: Board-level ESD protection for USB 2.0 data lines and VBUS in portable audio devices, meeting IEC 61000-4-2 ±15 kV contact discharge requirements. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector pins to divert ESD current before reaching USB controller ESD diodes. Use Value: Delivers 11.2 V clamping at 1000 A while maintaining <100 pF junction capacitance at 0 V bias - avoids signal integrity loss on 480 Mbps differential pairs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J6.5CAHM3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No difference in circuit function or layout; selected where halogen-free materials are mandated by OEM environmental policy. | Choose when compliance with automotive green-material directives (e.g., VW 80101) is required. |
| SMBJ6.5CAHE3/5B | Same VWM, VC, and PPPM, but rated for 1000 W unidirectional (vs. 800 W bidirectional); different thermal derating curve. | Unidirectional only - unsuitable for AC-coupled or dual-polarity signal lines without external polarity management. | Select only for DC-only rails where polarity is fixed and higher single-direction power handling is needed. |
Compared with SMB8J6.5CAHE3/5B, the HM3 variant offers identical protection performance with halogen-free construction, while SMBJ6.5CAHE3/5B trades bidirectional capability for +25% peak pulse power in unidirectional configurations - requiring careful signal polarity analysis before substitution.
Availability
SMB8J6.5CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rails, and consumer USB port protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J6.5CAHE3/5B 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, precision, and automotive qualification.
The SMB8J series belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J6.5CAHE3/5B at its rated peak pulse current?
The SMB8J6.5CAHE3/5B has a maximum clamping voltage (VC) of 11.2 V at 1000 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured and guaranteed per Vishay Document Number 88422, ensuring predictable voltage limiting during surge events. The SMB8J6.5CAHE3/5B maintains this clamping performance across its full operating temperature range from -55 °C to +150 °C.
Is SMB8J6.5CAHE3/5B suitable for automotive applications?
Yes, SMB8J6.5CAHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It meets MSL Level 1 reflow requirements and is validated for temperature cycling, HTRB, and ESD robustness - making it appropriate for engine control units, ADAS sensors, and body electronics. The SMB8J6.5CAHE3/5B data sheet confirms qualification per AEC-Q101 Rev D.
What is the standoff voltage and breakdown voltage range for SMB8J6.5CAHE3/5B?
The SMB8J6.5CAHE3/5B has a standoff voltage (VWM) of 6.5 V and a breakdown voltage (VBR) range of 7.22 V to 7.98 V at 10 mA test current. This 6.5 V VWM ensures compatibility with 5 V and 6 V logic systems, while the controlled VBR window guarantees reliable turn-on margin above normal operating voltage. These values are specified in the bidirectional electrical characteristics table of Vishay document 88422.
Does SMB8J6.5CAHE3/5B have polarity markings on the package?
No, SMB8J6.5CAHE3/5B does not have polarity markings because it is a bidirectional TVS diode - both terminals are functionally symmetrical and interchangeable in circuit layout. Unlike unidirectional variants (e.g., SMB10J6.5A), the SMB8J6.5CAHE3/5B lacks a cathode band or other visual indicator. This symmetry simplifies placement in AC-coupled or dual-polarity signal paths and eliminates orientation errors during automated assembly.
What is the thermal resistance and maximum junction temperature of SMB8J6.5CAHE3/5B?
The SMB8J6.5CAHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. Its maximum junction temperature (TJ) is +150 °C, enabling operation in under-hood automotive environments and high-temperature industrial enclosures. These thermal parameters are confirmed in the Thermal Characteristics section of Vishay document 88422.
SMB8J6.5CAHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J6.5CAHE3/5B FAQ
1.How can I place an order for SMB8J6.5CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J6.5CAHE3/5B 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 SMB8J6.5CAHE3/5B reliable?
The price and inventory of SMB8J6.5CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J6.5CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J6.5CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J6.5CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J6.5CAHE3/5B?
SMB8J6.5CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J6.5CAHE3/5B 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 SMB8J6.5CAHE3/5B?
For technical support, including SMB8J6.5CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J6.5CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J6.5CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J6.5CAHE3/5B 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 SMB8J6.5CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J6.5CAHE3/5B?
All SMB8J6.5CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J6.5CAHE3/5B, 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 SMB8J6.5CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J6.5CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J6.5CAHE3/5B Tags
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