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Vishay General Semiconductor - Diodes Division SMBJ7.0-E3/5B
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- Part No.:
- SMBJ7.0-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0-E3/5B.pdf
- Description:
- TVS DIODE 7VWM 13.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,248
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Product details
Overview
SMBJ7.0-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage at 10 mA test current, and clamps transients to ≤12.0 V at 50.0 A peak pulse current under 10/1000 µs waveform - deployed in automotive infotainment power inputs, industrial PLC I/O modules, and USB port ESD protection circuits.
For engineers reviewing the SMBJ7.0-E3/5B datasheet, SMBJ7.0-E3/5B pinout, SMBJ7.0-E3/5B application, or SMBJ7.0-E3/5B equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior, thermal derating curves, and direct alternatives for circuit-level surge protection design and BOM validation.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ps) to transient events such as ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5). Its unidirectional polarity enables integration on positive-rail protection paths without reverse-bias leakage concerns beyond 800 µA at VWM.
The SMBJ7.0-E3/5B is rated for 600 W peak pulse power (10/1000 µs), 5.0 W steady-state power dissipation at 50 °C ambient, and operates across –55 °C to +150 °C junction temperature range. It meets MSL Level 1 per J-STD-020 and is RoHS-compliant (E3 suffix), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line's nominal DC voltage. |
| VBR min/max | 7.78 V / 8.60 V at IT = 10 mA - Confirmed breakdown window ensures reliable turn-on during overvoltage while avoiding false triggering. |
| VC @ IPPM | ≤12.0 V at 50.0 A - Clamping voltage defines worst-case stress imposed on downstream ICs during 600 W surge event. |
| IPPM | 50.0 A - Peak surge current capacity under standardized 10/1000 µs waveform; determines survivability against common industrial transients. |
| PPPM | 600 W - Peak pulse power rating directly correlates to energy absorption capability (≈0.6 J per pulse). |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance informs PCB copper pad sizing (0.2" × 0.2") for thermal management. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive or high-ambient industrial environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for lead-free reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to ground or low-side reference in unidirectional TVS configuration. | Enables clamping action when cathode-side voltage exceeds VBR; must be tied to system ground plane with low-inductance path. |
| Cathode | Protected line connection point; marked by black band on package body. | Connected to the line being protected (e.g., 5 V rail, USB VBUS); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation over rated lifetime. |
| Clamping ratio VC/VBR ≈ 1.45 | Indicates tight avalanche control and low dynamic impedance (~0.24 Ω), minimizing let-through energy to sensitive loads. |
| MSL Level 1, peak reflow ≤260 °C | Enables single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| Low leakage: ≤800 µA at VWM | Prevents excessive quiescent current draw in battery-powered or always-on systems, preserving standby efficiency. |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor interfaces. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 5 V supply rail of infotainment head unit against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND, acting as crowbar during >12 V transients. Use Value: Limits voltage seen by downstream DC/DC converter and MCU to ≤12.0 V, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog output of pressure sensor in factory automation PLC against cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector interface, shunting ESD pulses before reaching op-amp input stage. Use Value: Maintains signal integrity with <1 ps response and sub-12 V clamping, avoiding ADC saturation or offset drift. |
| USB 2.0 VBUS Line Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Safeguarding USB host port VBUS against hot-plug inrush and external ESD coupling. IC Role / Device Role / Timing Role: Cathode tied to VBUS, anode to chassis ground; conducts only during overvoltage. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) while adding <0.5 pF capacitance - no USB 2.0 timing violation. |
Use Scenario: Front-end protection of ADSL line driver IC against lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Paired with gas discharge tube (GDT) in hybrid protection network; handles fast rise-time component. Use Value: Clamps 10/1000 µs surges to ≤12.0 V within 1 ns, enabling GDT to handle bulk energy without semiconductor overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and SMB package. | No functional difference; selected where halogen-free compliance is mandated (e.g., EU public infrastructure projects). | Direct material substitution if halogen-free requirement applies; same layout and thermal profile. |
| SMCJ7.0A-E3/57 | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC ratings. | Used where higher surge energy (e.g., outdoor telecom cabinets) demands greater single-pulse robustness. | Requires PCB footprint change; preferred when 600 W is insufficient but same clamping performance is critical. |
Compared with SMBJ7.0-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while the SMCJ7.0A-E3/57 provides 2.5× higher surge energy handling in a larger footprint - enabling tiered design flexibility from consumer-grade to industrial-class transient immunity.
Availability
SMBJ7.0-E3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC I/O protection, and USB interface hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ7.0-E3/5B 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, power efficiency, and AEC-Q qualification.
The SMBJ series is engineered for high-energy transient suppression in space-constrained applications, targeting automotive, industrial, and communications systems where consistent clamping, low leakage, and automated assembly compatibility are essential.
FAQ
What is the maximum clamping voltage of SMBJ7.0-E3/5B at its rated peak pulse current?
The SMBJ7.0-E3/5B 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. The SMBJ7.0-E3/5B maintains this clamping performance across its operational temperature range and after repeated surge exposures within datasheet limits.
Is SMBJ7.0-E3/5B suitable for bidirectional signal line protection?
No, SMBJ7.0-E3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection (e.g., RS-485, CAN bus), the SMBJ7.0CA variant must be used. Using SMBJ7.0-E3/5B on AC-coupled or symmetric signal lines would result in forward conduction during negative half-cycles, causing malfunction or damage. The SMBJ7.0-E3/5B is intended exclusively for DC rail or unidirectional signal protection where polarity is fixed.
What is the thermal resistance and how does it affect PCB layout for SMBJ7.0-E3/5B?
The SMBJ7.0-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's DO-214AA outline. To maintain TJ ≤150 °C under 5.0 W steady-state dissipation, designers must allocate sufficient copper area and consider airflow; exceeding RθJA due to undersized pads raises junction temperature and degrades surge endurance. The SMBJ7.0-E3/5B's thermal performance is validated only with this pad geometry.
Does SMBJ7.0-E3/5B meet automotive qualification standards?
The SMBJ7.0-E3/5B itself is commercial-grade (E3 suffix) and not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ7.0AHE3_B variant (with HE3 suffix) that is AEC-Q101 qualified for automotive applications. If automotive use is required - such as in body control modules or infotainment systems - the HE3 version must be specified. The SMBJ7.0-E3/5B remains appropriate for industrial and consumer applications where AEC-Q101 is not mandated.
How does the leakage current of SMBJ7.0-E3/5B impact low-power designs?
The SMBJ7.0-E3/5B exhibits a maximum reverse leakage current (ID) of 800 µA at its 7.0 V stand-off voltage (VWM) and 25 °C ambient, rising with temperature. In battery-powered or ultra-low-quiescent-current systems (e.g., IoT sensors), this leakage may contribute measurably to standby drain. Designers should verify total system leakage budget - especially at elevated temperatures - and consider lower-leakage alternatives like the SMAJ7.0A (5 µA max) if sub-100 µA is required. The SMBJ7.0-E3/5B's leakage remains within spec for most industrial and automotive auxiliary circuits.
SMBJ7.0-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 45.1A
- 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)
SMBJ7.0-E3/5B FAQ
1.How can I place an order for SMBJ7.0-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0-E3/5B 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 SMBJ7.0-E3/5B reliable?
The price and inventory of SMBJ7.0-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.0-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0-E3/5B?
SMBJ7.0-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0-E3/5B 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 SMBJ7.0-E3/5B?
For technical support, including SMBJ7.0-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0-E3/5B requirements.
6.How does Aetrix verify that SMBJ7.0-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0-E3/5B 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 SMBJ7.0-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.0-E3/5B?
All SMBJ7.0-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0-E3/5B, 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 SMBJ7.0-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.0-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0-E3/5B Tags
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