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Vishay General Semiconductor - Diodes Division SMBJ7.0CAHM3_B/H
- Part No.:
- SMBJ7.0CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CAHM3_B/H.pdf
- Description:
- 600W,7.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,544
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Product details
Overview
SMBJ7.0CAHM3_B/H 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), 6.4–7.25 V breakdown voltage (VBR) at 10 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤12.0 V at 50.0 A peak surge current - deployed in sensor interface protection and industrial I/O circuits.
For engineers reviewing the SMBJ7.0CAHM3_B/H datasheet, SMBJ7.0CAHM3_B/H pinout, SMBJ7.0CAHM3_B/H application, or SMBJ7.0CAHM3_B/H equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, AEC-Q101 qualification status, and direct replacement guidance for automotive-grade transient suppression.
Technical Context
This device operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its 10/1000 µs waveform rating supports high-energy ESD and lightning-induced surges per IEC 61000-4-5 Level 4.
Thermal resistance is characterized at RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, supporting reliable operation up to TJ = +150 °C. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 6.4 V / 7.25 V at IT = 10 mA - guaranteed breakdown range ensures consistent turn-on across production lots |
| VC @ IPPM | 12.0 V at 50.0 A - clamping voltage defines worst-case overvoltage seen by protected IC during surge |
| PPPM | 600 W (10/1000 µs) - energy-handling capability for repetitive transients in industrial environments |
| ID @ VWM | 800 µA max - low leakage preserves signal integrity and battery life in always-on sensor nodes |
| TJ max | +150 °C - enables deployment in under-hood automotive or high-ambient industrial enclosures |
| Package | SMB (DO-214AA) - standardized footprint compatible with automated SMT placement and IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage above ±12.0 V regardless of polarity - eliminates orientation errors during assembly |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without external polarity management |
| 600 W peak pulse power | Withstands repeated 10/1000 µs surges up to 50 A - meets IEC 61000-4-5 Level 4 (4 kV line-to-line) with margin |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules and ADAS sensor interfaces requiring zero-defect reliability |
| Halogen-free & RoHS-compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance - suitable for green manufacturing |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces production overhead and avoids moisture-induced popcorning |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps transients to ≤12.0 V while maintaining <800 µA leakage - prevents latch-up in 5 V rail-sensing op-amps and microcontrollers. |
Use Scenario: Safeguarding PLC digital input channels against field-wiring induced surges and electrostatic discharge in factory automation systems. IC Role / Device Role / Timing Role: Primary front-end clamp on 24 V DC input lines, coordinated with series impedance and filtering capacitors. Use Value: 600 W rating sustains repeated 1 kV/0.5 J transients per IEC 61000-4-4; SMB package allows dense layout near connectors. |
| Consumer Device USB Port | Telecom Line Interface |
Use Scenario: ESD protection for USB 2.0 D+/D− lines in portable medical monitors and smart home hubs exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB connector to minimize stub length and preserve signal integrity. Use Value: Sub-12 V clamping voltage prevents damage to 3.3 V USB PHY transceivers; fast response time (<1 ns) intercepts HBM events before propagation. |
Use Scenario: Overvoltage protection on telephone line interface circuits (e.g., DSL, POTS) subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Secondary protection device downstream of gas discharge tube (GDT), handling residual energy after primary diversion. Use Value: Symmetrical breakdown ensures equal clamping on tip/ring conductors; 150 °C junction rating supports operation in sealed telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CAHE3_B/H | Same electrical specs and SMB package; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks JESD201 Class 2 whisker resistance and halogen-free certification required for some automotive Tier 1 programs | Select SMBJ7.0CAHE3_B/H only for commercial-grade applications where halogen-free compliance is not mandated. |
| SMAJ7.0CA | Lower PPPM (400 W), larger VBR tolerance (6.4–8.2 V), SMA package (smaller thermal mass, higher RθJA) | Insufficient surge margin for IEC 61000-4-5 Level 4; limited to lower-energy transients in cost-sensitive consumer designs | Choose SMAJ7.0CA only when board space is constrained and peak surge energy remains below 400 W. |
Compared with SMBJ7.0CAHE3_B/H, the SMBJ7.0CAHM3_B/H adds halogen-free construction and whisker resistance for automotive use; versus SMAJ7.0CA, it delivers 50 % higher surge power and tighter VBR control - making it the preferred choice for industrial and automotive front-end protection where reliability and energy handling are critical.
Availability
SMBJ7.0CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply with AEC-Q101 qualification and halogen-free compliance.
Supply support for SMBJ7.0CAHM3_B/H 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, power efficiency, and automotive-grade validation.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for robust clamping performance, repeatable surge endurance, and seamless integration into automotive, industrial, and telecom infrastructure designs.
FAQ
What does the "HM3" suffix indicate in SMBJ7.0CAHM3_B/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility. It also signifies AEC-Q101 qualification - confirmed in Vishay's ordering information table for SMBJ7.0CAHM3_B/H. This makes SMBJ7.0CAHM3_B/H suitable for automotive applications where material compliance and long-term solder joint reliability are mandatory.
Is SMBJ7.0CAHM3_B/H bidirectional, and how does that affect its use in circuit design?
Yes, SMBJ7.0CAHM3_B/H is explicitly bidirectional, as indicated by the "CA" suffix and confirmed in Vishay's documentation stating "electrical characteristics apply in both directions." This means it provides symmetrical clamping above ±12.0 V without polarity constraints - ideal for protecting AC-coupled lines, differential interfaces like RS-485, or ungrounded sensor outputs where voltage polarity may reverse. No orientation check is needed during PCB assembly.
What is the maximum clamping voltage of SMBJ7.0CAHM3_B/H, and under what test condition is it specified?
The maximum clamping voltage (VC) of SMBJ7.0CAHM3_B/H is 12.0 V, measured at a peak pulse current (IPPM) of 50.0 A using a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of Vishay document 88392 and defines the upper limit of overvoltage imposed on protected circuitry during a surge event.
Can SMBJ7.0CAHM3_B/H replace unidirectional TVS diodes like SMBJ7.0A in existing designs?
No - SMBJ7.0CAHM3_B/H is bidirectional and lacks polarity marking, whereas SMBJ7.0A is unidirectional with cathode band identification. Substituting SMBJ7.0CAHM3_B/H for SMBJ7.0A may cause unintended conduction in DC-biased circuits. For unidirectional applications, use SMBJ7.0AHM3_B/H instead; SMBJ7.0CAHM3_B/H is intended only where symmetrical clamping is required.
Does SMBJ7.0CAHM3_B/H meet any international surge immunity standards out of the box?
SMBJ7.0CAHM3_B/H itself is a component, not a system-level solution - but its 600 W peak pulse power (10/1000 µs) and ≤12.0 V clamping enable compliant designs per IEC 61000-4-5 Level 4 (4 kV line-to-line) when used with appropriate series impedance and PCB layout. Vishay confirms suitability for lighting and inductive-switching transient protection per its Typical Applications section - however, full system validation remains the designer's responsibility.
SMBJ7.0CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for SMBJ7.0CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CAHM3_B/H 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_B/H reliable?
The price and inventory of SMBJ7.0CAHM3_B/H 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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CAHM3_B/H?
SMBJ7.0CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CAHM3_B/H 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_B/H?
For technical support, including SMBJ7.0CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ7.0CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CAHM3_B/H 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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CAHM3_B/H?
All SMBJ7.0CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CAHM3_B/H, 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_B/H part is unused and in its original packaging.
Return procedure for SMBJ7.0CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0CAHM3_B/H Tags
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