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Vishay General Semiconductor - Diodes Division SMBJ7.0AHE3_B/I
- Part No.:
- SMBJ7.0AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AHE3_B/I.pdf
- Description:
- 600W,7.0V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,193
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Product details
Overview
SMBJ7.0AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power 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, 12.0 V maximum clamping voltage at 50.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.0AHE3_B/I datasheet, SMBJ7.0AHE3_B/I pinout, SMBJ7.0AHE3_B/I application, or SMBJ7.0AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a clamping device in reverse-biased configuration, triggering when transient voltage exceeds its breakdown threshold (VBR). Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling protection against ESD, lightning-induced surges, and inductive switching spikes.
The SMBJ7.0AHE3_B/I is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and it carries AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 7.78 V / 8.60 V at IT = 10 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | 12.0 V at 50.0 A - Clamped voltage during 600 W transient, limiting stress on downstream circuitry |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform, supporting repetitive surge duty cycle of 0.01 % |
| IPPM | 50.0 A - Peak pulse current capability under standard waveform, directly tied to PCB pad layout (0.2" × 0.2") |
| TJ max | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient, guiding heatsinking requirements for sustained power dissipation |
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); UL 94 V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 7 V rail); band denotes cathode end per polarity marking convention |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use with extended temperature cycling and humidity testing |
| 600 W peak pulse power | Robust surge immunity against IEC 61000-4-5 Level 4 (4 kV) and ISO 7637-2 pulse 1/2b/5a |
| Glass passivated junction | Stable VBR tolerance and low leakage (<1.0 µA) over lifetime and temperature |
| MSL Level 1 moisture sensitivity | Zero bake requirement before reflow; compatible with standard SMT assembly processes up to 260 °C peak |
| UL 497B recognized | Approved for use as a primary surge protector in telecom and industrial interface circuits |
Applications
| Industrial Power Input Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V DC input rail in programmable logic controllers exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input and ground to clamp transients before they reach DC-DC converter ICs. Use Value: Limits voltage to ≤12.0 V during 50 A surge, preventing latch-up or gate oxide damage in downstream regulators. |
Use Scenario: CAN bus or LIN signal lines connected to engine control unit sensors subject to ESD and coupled noise. IC Role / Device Role / Timing Role: Standoff protection element on signal line, leveraging 7.0 V VWM to avoid interference with 5 V logic levels. Use Value: Sub-1 ns response ensures clamping occurs before microsecond-scale ESD events disrupt communication timing. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: VBUS line in USB 2.0 host ports subjected to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary clamping device on 5 V supply line, coordinated with series impedance for IEC 61000-4-2 compliance. Use Value: 12.0 V clamping voltage maintains safe margin below USB PHY IC absolute maximum ratings (typically 6.5 V). |
Use Scenario: Tip/ring lines in VoIP gateway analog front-end exposed to lightning-induced surges per GR-1089-CORE. IC Role / Device Role / Timing Role: First-stage protector mounted at connector, paired with gas discharge tube for multi-level defense. Use Value: 600 W rating supports coordination with secondary protectors while maintaining low let-through voltage for silicon-based receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A-E3/52 | Commercial-grade (non-AEC-Q101), same electrical specs and SMB package | Lacks automotive qualification; suitable for consumer/industrial but not automotive Tier-1 designs | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMBJ7.0CAHE3_B/I | Bidirectional variant; symmetric VBR (±7.78–8.60 V), no polarity marking | Used where AC-coupled or bidirectional signal lines require symmetrical clamping (e.g., RS-485) | Choose only if circuit requires clamping in both polarities; not a drop-in replacement due to polarity difference |
Compared with SMBJ7.0AHE3_B/I, the SMBJ7.0A-E3/52 offers identical clamping performance without automotive qualification, while SMBJ7.0CAHE3_B/I provides bidirectional protection at the cost of losing unidirectional polarity alignment - requiring schematic and layout review before substitution.
Availability
SMBJ7.0AHE3_B/I is available at Aetrix Electronics and suitable for industrial power input protection, automotive sensor interface protection, consumer USB port protection, and telecom line card surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ7.0AHE3_B/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 validation.
The SMBJ series targets robust transient suppression in space-constrained, high-reliability systems - engineered for automotive, industrial, and telecom applications where surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ7.0AHE3_B/I at its rated peak pulse current?
The SMBJ7.0AHE3_B/I has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 50.0 A using the standardized 10/1000 µs waveform. This value is measured under specified test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ7.0AHE3_B/I maintains this clamping performance across its operational temperature range.
Is SMBJ7.0AHE3_B/I AEC-Q101 qualified, and what does that mean for automotive use?
Yes, SMBJ7.0AHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in Vishay's ordering information table. This qualification validates the device for automotive electronic modules through rigorous stress testing including temperature cycling, humidity bias, mechanical shock, and accelerated life testing. For automotive applications, SMBJ7.0AHE3_B/I supports reliable transient protection in engine control units, body electronics, and ADAS sensor interfaces where failure modes must meet stringent safety and longevity requirements.
How does the SMBJ7.0AHE3_B/I differ from the SMBJ7.0A-E3/52 variant?
The SMBJ7.0AHE3_B/I and SMBJ7.0A-E3/52 share identical electrical characteristics (VWM, VBR, VC, PPPM) and SMB package, but differ in qualification and packaging format. SMBJ7.0AHE3_B/I is AEC-Q101 qualified and supplied in 13" tape-and-reel (I-pack), whereas SMBJ7.0A-E3/52 is commercial-grade (non-automotive) and shipped in 7" reel (52-pack). Both are RoHS-compliant, but only SMBJ7.0AHE3_B/I meets automotive reliability standards required for Tier-1 supply chains.
What is the thermal resistance and maximum power dissipation of SMBJ7.0AHE3_B/I?
The SMBJ7.0AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W under standard mounting conditions (0.2" × 0.2" copper pads per terminal), and a steady-state power dissipation (PD) rating of 5.0 W at TA = 50 °C on an infinite heatsink. These values define its thermal management envelope: for example, at 25 °C ambient, continuous power handling is ~3.3 W before reaching the 150 °C maximum junction temperature. The SMBJ7.0AHE3_B/I is not intended for continuous power regulation but for transient energy absorption.
Can SMBJ7.0AHE3_B/I be used in bidirectional signal protection applications?
No, SMBJ7.0AHE3_B/I is a unidirectional TVS diode, identified by its cathode band marking and specified breakdown behavior only in reverse bias. For bidirectional protection (e.g., on AC-coupled or differential lines like RS-485), the SMBJ7.0CAHE3_B/I variant must be used instead. Attempting to use SMBJ7.0AHE3_B/I in bidirectional configurations risks forward conduction during negative transients, leading to excessive current, overheating, or failure. The SMBJ7.0AHE3_B/I is strictly intended for DC rail or single-polarity signal line protection.
SMBJ7.0AHE3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ7.0AHE3_B/I FAQ
1.How can I place an order for SMBJ7.0AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AHE3_B/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 SMBJ7.0AHE3_B/I reliable?
The price and inventory of SMBJ7.0AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AHE3_B/I?
SMBJ7.0AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AHE3_B/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 SMBJ7.0AHE3_B/I?
For technical support, including SMBJ7.0AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ7.0AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AHE3_B/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 SMBJ7.0AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AHE3_B/I?
All SMBJ7.0AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AHE3_B/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 SMBJ7.0AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ7.0AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0AHE3_B/I Tags
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