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Vishay General Semiconductor - Diodes Division SMBJ7.0CA-E3/52
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- Part No.:
- SMBJ7.0CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CA-E3/52.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,530
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Product details
Overview
SMBJ7.0CA-E3/52 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 and power lines. It features a 7.0 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 12.0 V maximum clamping voltage at 50.0 A peak pulse current, and operates across -55 °C to +150 °C junction temperature - deployed in sensor interface protection for industrial automation systems.
For engineers reviewing the SMBJ7.0CA-E3/52 datasheet, SMBJ7.0CA-E3/52 pinout, SMBJ7.0CA-E3/52 application, or SMBJ7.0CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.71), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical breakdown behavior (VBR min/max = 6.40 V / 7.07 V at 10 mA) ensures consistent clamping in both polarities without polarity marking on the case.
The device meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 for transient suppressor definitions. Thermal performance is characterized by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation under repetitive 0.01% duty cycle surges when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; sets safe margin below system supply or signal swing. |
| VBR (min/max) | 6.40 V / 7.07 V at 10 mA - Confirmed bidirectional breakdown threshold; ensures symmetrical clamping onset in either direction. |
| VC @ IPPM | 12.0 V at 50.0 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 600 W - Peak transient energy handling capacity; supports robust protection against IEC 61000-4-5 Level 3/4 surges. |
| IPPM | 50.0 A - Maximum non-repetitive surge current; defines physical current-handling limit before junction failure. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in high-ambient environments like motor drives or outdoor telecom. |
| Package | SMB (DO-214AA) - Low-profile SMT outline (5.21 mm × 4.06 mm × 2.20 mm); optimized for automated pick-and-place and board space efficiency. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetric; both leads serve as interchangeable surge current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive polarity) | Accepts transient energy from positive-going overvoltage events; connects to protected line (e.g., RS-485 A). |
| Cathode | Surge current entry (negative polarity) | Accepts transient energy from negative-going overvoltage events; connects to same protected line (e.g., RS-485 A) - bidirectional symmetry means both pins behave identically. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against high-energy transients such as lightning-induced surges or inductive switch-off spikes in industrial controls. |
| Clamping voltage ≤ 12.0 V at 50 A | Provides tight voltage limiting to safeguard 5 V or 3.3 V logic interfaces without requiring additional series impedance or buffering. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without preconditioning, reducing manufacturing complexity and cost in high-volume SMT lines. |
| Glass-passivated junction | Ensures stable VBR and low leakage (< 800 µA at VWM) over lifetime, critical for long-term reliability in unattended equipment. |
| UL 497B recognized (QVGQ2) | Validates compliance for telecom and data-line surge protection in certified end-equipment, accelerating safety certification cycles. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (CAN/LIN) in PLC I/O modules exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground to shunt transient energy before it reaches ADC input or microcontroller GPIO. Use Value: Prevents latch-up or permanent damage to precision op-amps and MCU peripherals during field wiring faults or maintenance hot-plug events. |
Use Scenario: Safeguarding LIN bus transceivers and window lift motor drivers in door modules subjected to load dump and battery reverse connection. IC Role / Device Role / Timing Role: Primary transient suppressor on power rail (VBAT) and bidirectional data line (LIN), absorbing 10/1000 µs surges up to 50 A. Use Value: Maintains communication integrity and prevents reset corruption during vehicle jump-start or alternator regulation faults. |
| Telecom Data Line Protection | Consumer Appliance Motor Control |
|
Use Scenario: Shielding Ethernet PHY magnetics and RS-485 transceivers in networked HVAC controllers from induced surges on building-wide cabling. IC Role / Device Role / Timing Role: Line-to-ground TVS pair (one per differential line) providing common-mode surge suppression compliant with IEC 61000-4-5. Use Value: Eliminates need for external gas discharge tubes or multi-stage protection, simplifying BOM and PCB layout while meeting EN 61000-6-2 immunity requirements. |
Use Scenario: Clamping back-EMF spikes from brushed DC motors in washing machine control boards during commutation and brake activation. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to clamp inductive kickback before it couples into MCU power rails or optocoupler inputs. Use Value: Reduces conducted emissions and prevents false resets of main controller, improving EMC test pass rate and field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same thermal and clamping performance. | No functional difference; selected where halogen-free material compliance is mandated by OEM environmental policy. | Choose SMBJ7.0CA-M3/52 when halogen-free bill-of-materials is required; otherwise SMBJ7.0CA-E3/52 offers standard commercial-grade compliance. |
| SMBJ7.0CAHE3_B/I | AEC-Q101 qualified version with identical VWM, VC, and PPPM; validated for automotive temperature cycling and humidity testing. | Required for under-hood or body electronics where automotive qualification is mandatory; not needed for industrial or consumer use. | Select SMBJ7.0CAHE3_B/I only for automotive production programs; SMBJ7.0CA-E3/52 suffices for non-automotive applications with lower qualification burden. |
Compared with SMBJ7.0CA-M3/52 and SMBJ7.0CAHE3_B/I, the SMBJ7.0CA-E3/52 provides the baseline commercial-grade specification with RoHS compliance and UL recognition - offering optimal cost-performance balance for industrial, telecom, and consumer designs where halogen-free or AEC-Q101 validation is not required.
Availability
SMBJ7.0CA-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive body electronics, telecom data line hardening, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for SMBJ7.0CA-E3/52 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 application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh electromagnetic environments - targeting industrial automation, automotive subsystems, and infrastructure communications.
FAQ
What is the clamping voltage of SMBJ7.0CA-E3/52 at its rated peak pulse current?
The SMBJ7.0CA-E3/52 has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 50.0 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 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 of the SMBJ7.0CA-E3/52.
Is SMBJ7.0CA-E3/52 suitable for bidirectional signal line protection?
Yes, SMBJ7.0CA-E3/52 is explicitly designed for bidirectional protection, as indicated by the "CA" suffix and confirmed in Vishay's documentation: electrical characteristics apply identically in both directions, with symmetrical breakdown voltages (6.40 V to 7.07 V) and no polarity marking on the SMB package. This makes SMBJ7.0CA-E3/52 ideal for protecting differential buses like RS-485, CAN, or LIN where voltage transients can occur with either polarity relative to ground.
Does SMBJ7.0CA-E3/52 meet automotive qualification standards?
No, SMBJ7.0CA-E3/52 is a commercial-grade device with RoHS compliance and UL 497B recognition but is not AEC-Q101 qualified. For automotive applications requiring qualification, Vishay offers the SMBJ7.0CAHE3_B/I variant - an AEC-Q101 qualified version of the same device. The SMBJ7.0CA-E3/52 remains appropriate for industrial, telecom, and consumer applications where automotive-grade validation is not mandated.
What is the maximum operating temperature range for SMBJ7.0CA-E3/52?
The SMBJ7.0CA-E3/52 has a specified operating junction and storage temperature range of -55 °C to +150 °C, per Vishay document 88392. This wide thermal envelope supports deployment in demanding environments such as motor drive enclosures, outdoor telecom cabinets, and under-hood automotive zones - provided PCB layout follows recommended 0.2" × 0.2" copper pad guidelines to maintain thermal derating integrity for the SMBJ7.0CA-E3/52.
How does the SMBJ7.0CA-E3/52 compare to unidirectional variants like SMBJ7.0A-E3/52?
The SMBJ7.0CA-E3/52 differs from unidirectional SMBJ7.0A-E3/52 in polarity behavior: SMBJ7.0CA-E3/52 clamps transients in both directions with symmetrical VBR and no cathode band, while SMBJ7.0A-E3/52 has a marked cathode and only conducts in reverse bias. Both share identical VWM (7.0 V), PPPM (600 W), and package (SMB), but SMBJ7.0CA-E3/52 is selected for AC-coupled or differential lines; SMBJ7.0A-E3/52 suits DC power rail protection where polarity is fixed.
SMBJ7.0CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ7.0CA-E3/52 FAQ
1.How can I place an order for SMBJ7.0CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CA-E3/52 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 SMBJ7.0CA-E3/52 reliable?
The price and inventory of SMBJ7.0CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CA-E3/52?
SMBJ7.0CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CA-E3/52 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 SMBJ7.0CA-E3/52?
For technical support, including SMBJ7.0CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ7.0CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CA-E3/52 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 SMBJ7.0CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CA-E3/52?
All SMBJ7.0CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CA-E3/52, 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 SMBJ7.0CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.0CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0CA-E3/52 Tags
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