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Vishay General Semiconductor - Diodes Division SMBJ7.0CAHM3/I
- Part No.:
- SMBJ7.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CAHM3/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,100
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Product details
Overview
SMBJ7.0CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 7.0 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), and clamps to ≤12.0 V at 50.0 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ7.0CAHM3/I datasheet, SMBJ7.0CAHM3/I pinout, SMBJ7.0CAHM3/I application, or SMBJ7.0CAHM3/I equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for bidirectional overvoltage protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 6.40–7.07 V (min/max) under 10 mA test current. Its clamping behavior is defined by a maximum VC of 12.0 V at IPPM = 50.0 A, enabling robust protection of downstream ICs against ESD and inductive switching surges.
Thermal performance is characterized by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting operation from –55 °C to +150 °C junction temperature. The device meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 6.40 V / 7.07 V at IT = 10 mA - Ensures reliable turn-on within tight tolerance for predictable transient suppression timing. |
| IPPM | 50.0 A (10/1000 µs waveform) - Peak surge current capability determines protection level against lightning or inductive kick events. |
| VC | ≤12.0 V at IPPM - Clamping voltage directly limits stress on protected ICs; lower value improves system-level robustness. |
| PPPM | 600 W - Peak pulse power rating confirms suitability for high-energy transients without thermal runaway. |
| TJ max. | +150 °C - Enables use in under-hood automotive or high-ambient industrial environments without derating. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for automated assembly. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function identically in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band or polarity designation required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3/4 surge immunity testing without external derating. |
| Clamping voltage ≤12.0 V at 50 A | Protects 3.3 V and 5 V logic interfaces (e.g., RS-485, CAN, USB) by limiting voltage stress below IC absolute maximum ratings. |
| AEC-Q101 qualified & halogen-free (HM3 suffix) | Validated for automotive electronics use with traceable reliability data and environmentally compliant materials. |
| MSL Level 1, 260 °C peak reflow | Permits standard lead-free SMT assembly without moisture sensitivity handling or baking requirements. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±1 kV ESD (IEC 61000-4-2) and ±100 V inductive transients. Use Value: Prevents latch-up or gate oxide damage in precision ADC front-ends by limiting voltage excursion to ≤12.0 V during surge events. |
Use Scenario: Safeguarding microcontroller GPIOs connected to door lock actuators or window motor drivers in BCMs. IC Role / Device Role / Timing Role: Fast-response transient suppressor absorbing load-dump spikes (ISO 7637-2 Pulse 5a) before reaching MCU pins. Use Value: Eliminates need for discrete Zener + series resistor networks while maintaining AEC-Q100 compliance for Grade 2 operation. |
| Telecom Line Interface (RS-485) | Consumer Appliance Motor Drive Feedback |
|
Use Scenario: Shielding half-duplex RS-485 transceivers in building management controllers from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping element across A/B differential pair, referenced to ground via low-inductance layout. Use Value: Maintains signal integrity up to 10 Mbps by minimizing capacitance (CJ ≈ 300 pF at 0 V) while delivering 600 W surge handling. |
Use Scenario: Protecting hall-effect rotor position feedback lines in BLDC motor drives inside washing machines or HVAC fans. IC Role / Device Role / Timing Role: TVS mounted adjacent to motor controller PCB edge to intercept commutation-induced dv/dt transients. Use Value: Prevents false triggering of motor control logic by suppressing >1 kV transients to sub-12 V levels within <1 ns response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CAHE3/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and SMB package. | Suitable for commercial-grade industrial equipment where automotive qualification is unnecessary. | Select when halogen-free content or automotive reliability validation is not required; lower cost alternative. |
| SMAJ7.0CAHM3 | Lower peak pulse power (400 W vs. 600 W); SMA (DO-214AC) package with smaller footprint (4.57 mm × 2.79 mm). | Used where board space is constrained and surge energy is limited to IEC 61000-4-2 Level 2. | Choose for space-constrained consumer designs accepting reduced surge margin; not drop-in due to different package and thermal mass. |
Compared with SMBJ7.0CAHM3/I, the HE3/I variant trades halogen-free and AEC-Q101 compliance for cost savings, while the SMAJ7.0CAHM3 sacrifices 33 % pulse power and thermal robustness for miniaturization - making SMBJ7.0CAHM3/I optimal for automotive and high-reliability industrial deployments demanding full 600 W capability and validated qualification.
Availability
SMBJ7.0CAHM3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line protection, and consumer appliance motor drive feedback requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ7.0CAHM3/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 reliability, efficiency, and application-specific optimization.
The SMBJ series delivers standardized, high-power TVS solutions targeting automotive, industrial, and telecom surge protection - engineered for rapid response, low clamping, and seamless integration into automated SMT lines.
FAQ
What does the "HM3" suffix indicate in SMBJ7.0CAHM3/I?
The HM3 suffix denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification. This means SMBJ7.0CAHM3/I meets automotive reliability standards and environmental regulations, including JESD201 Class 2 whisker resistance and UL 497B recognition - critical for under-hood and safety-critical applications.
Is SMBJ7.0CAHM3/I unidirectional or bidirectional?
SMBJ7.0CAHM3/I is a bidirectional TVS diode, confirmed by the "CA" suffix per Vishay's naming convention. It provides symmetrical clamping for both positive and negative transients without polarity marking - ideal for protecting AC-coupled signals, differential buses like RS-485, or floating inputs.
What is the maximum clamping voltage of SMBJ7.0CAHM3/I at rated surge current?
The maximum clamping voltage (VC) of SMBJ7.0CAHM3/I is 12.0 V at 50.0 A peak pulse current (10/1000 µs waveform). This value is measured under standardized test conditions and ensures downstream ICs experience no more than 12.0 V during worst-case surge events.
Can SMBJ7.0CAHM3/I replace SMBJ7.0A in a design?
No - SMBJ7.0A is unidirectional, while SMBJ7.0CAHM3/I is bidirectional. Substituting them requires verifying circuit polarity and transient directionality. Using SMBJ7.0CAHM3/I in place of SMBJ7.0A may compromise protection if the design relies on forward conduction blocking; always validate with actual surge waveforms and layout parasitics.
What is the thermal resistance from junction to ambient for SMBJ7.0CAHM3/I?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ7.0CAHM3/I is 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes standard FR-4 PCB and natural convection cooling - forced airflow or larger copper areas reduce effective RθJA.
SMBJ7.0CAHM3/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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 50A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ7.0CAHM3/I FAQ
1.How can I place an order for SMBJ7.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CAHM3/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 SMBJ7.0CAHM3/I reliable?
The price and inventory of SMBJ7.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CAHM3/I?
SMBJ7.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CAHM3/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 SMBJ7.0CAHM3/I?
For technical support, including SMBJ7.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CAHM3/I requirements.
6.How does Aetrix verify that SMBJ7.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CAHM3/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 SMBJ7.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CAHM3/I?
All SMBJ7.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CAHM3/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 SMBJ7.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ7.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0CAHM3/I Tags
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Diodes Incorporated
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