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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHM3_A/I
- Part No.:
- SMB8J7.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,749
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Product details
Overview
SMB8J7.0CAHM3_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 7.0 V stand-off voltage (VWM), 12.0 V clamping voltage (VC) at 400 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.0CAHM3_A/I datasheet, SMB8J7.0CAHM3_A/I pinout, SMB8J7.0CAHM3_A/I application, or SMB8J7.0CAHM3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.71), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture enables symmetric clamping above ±7.0 V without polarity dependency, supporting both AC-coupled and floating signal paths.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and JESD201 Class 2 whisker resistance. Thermal resistance is characterized at RθJA = 72 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 7.78 V / 8.60 V at IT = 10 mA - ensures consistent breakdown threshold across production lot |
| VC @ IPPM | 12.0 V at IPPM = 400 A - limits protected circuit voltage excursion during 10/1000 µs surge |
| PPPM | 800 W - peak power dissipation capability under standardized transient waveform |
| ID @ VWM | 200 µA max - low leakage preserves signal integrity in high-impedance sensor lines |
| TJ max | +150 °C - supports under-hood automotive and industrial ambient environments |
| Package | SMB (DO-214AA) - 3.94 mm × 2.20 mm footprint compatible with standard SMT pick-and-place |
Pinout & Package
SMB8J7.0CAHM3_A/I uses the SMB (DO-214AA) surface-mount package: 3.94 mm length × 2.20 mm width × 2.30 mm height, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking - bidirectional operation eliminates cathode/anode orientation requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical clamping function; no DC bias dependency - enables placement across differential or floating nodes |
| Case (exposed pad) | Thermal conduction path | No electrical connection; thermal relief via PCB copper area improves power handling during repetitive surges |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental standards and end-of-life recycling requirements |
| MSL Level 1 rating | Enables single-pass reflow without baking or special handling in high-volume manufacturing |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or ADC front-ends |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, critical for long-term field reliability |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point. Use Value: Limits transient voltage to ≤12.0 V during 400 A surge, preventing latch-up or damage to 5 V rail microcontrollers and signal conditioners. | Use Scenario: Shielding PLC digital input modules from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Primary surge suppression device on 24 V DC input lines before optocoupler isolation stage. Use Value: Absorbs 800 W of energy per event without degradation, maintaining system uptime in factory automation environments. |
| USB Interface ESD Protection | Telecom Line Surge Suppression |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in automotive infotainment head units against IEC 61000-4-2 contact discharge. IC Role / Device Role / Timing Role: Secondary-level TVS after common-mode choke, providing low-capacitance (<50 pF) clamping. Use Value: Clamps ±8 kV ESD events within <1 ns while adding <0.5 pF parasitic capacitance - preserving signal integrity at 480 Mbps. | Use Scenario: Protecting Ethernet PHY or RS-485 transceivers in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protector on twisted-pair lines, coordinated with gas discharge tube (GDT) upstream. Use Value: Handles 400 A 10/1000 µs surges with 12.0 V clamping, reducing let-through energy to downstream protection stages by >70 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CAHE3_A/I | RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker rating | Approved for commercial-grade automotive modules where halogen-free is not mandated | Select when cost sensitivity outweighs halogen-free requirement and whisker resistance is non-critical |
| SMAJ7.0CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (12.5 V) | Suitable for space-constrained consumer electronics with lower surge exposure | Choose for compact designs accepting reduced surge margin and slightly higher clamping voltage |
Compared with SMB8J7.0CAHM3_A/I, SMB8J7.0CAHE3_A/I offers identical electrical specs but omits halogen-free and whisker-resistant plating, while SMAJ7.0CA trades 50 % power rating and larger thermal footprint for 30 % smaller board area - requiring layout revision and derating in high-surge environments.
Availability
SMB8J7.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line surge suppression requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for SMB8J7.0CAHM3_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, rectifiers, MOSFETs, and passive components with emphasis on reliability and automotive-grade validation.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density transient suppression in harsh environments where AEC-Q101 qualification and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB8J7.0CAHM3_A/I at its rated peak pulse current?
The SMB8J7.0CAHM3_A/I has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A under the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 5 V or 3.3 V logic interfaces downstream.
Is SMB8J7.0CAHM3_A/I qualified for automotive use?
Yes, SMB8J7.0CAHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number: 88422, Revision: 09-Jan-2024). The HM3 suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance - meeting requirements for under-hood and chassis-mounted automotive electronics including body control modules and ADAS sensor nodes.
What does the "CA" in SMB8J7.0CAHM3_A/I signify?
The "CA" in SMB8J7.0CAHM3_A/I indicates bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMB8J7.0AHM3_A/I), this part has no polarity marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal lines such as RS-485 or Ethernet pairs.
How does the SMB8J7.0CAHM3_A/I compare to the SMB10J7.0CA variant?
SMB8J7.0CAHM3_A/I is rated for 800 W peak pulse power and 400 A IPPM, whereas SMB10J7.0CA delivers 1000 W and 83.3 A - reflecting different surge energy handling profiles. The "8" vs. "10" prefix denotes distinct internal chip geometries optimized for either higher current (SMB10) or higher power density (SMB8); SMB8J7.0CAHM3_A/I achieves superior power-to-footprint ratio but lower absolute current capacity than its SMB10 counterpart.
What is the maximum operating temperature for SMB8J7.0CAHM3_A/I?
The SMB8J7.0CAHM3_A/I has a maximum junction temperature (TJ max) of +150 °C, verified per Vishay's thermal characterization data. This rating allows continuous operation in demanding environments such as automotive engine compartments or industrial motor drive enclosures - provided PCB thermal design maintains junction-to-ambient resistance below 72 °C/W using recommended 5.0 mm × 5.0 mm copper pads per terminal.
SMB8J7.0CAHM3_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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- 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)
SMB8J7.0CAHM3_A/I FAQ
1.How can I place an order for SMB8J7.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/I reliable?
The price and inventory of SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHM3_A/I?
SMB8J7.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/I?
For technical support, including SMB8J7.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J7.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHM3_A/I?
All SMB8J7.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHM3_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 SMB8J7.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHM3_A/I Tags
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