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Vishay General Semiconductor - Diodes Division SMB8J7.0C-E3/52
- Part No.:
- SMB8J7.0C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0C-E3/52.pdf
- Description:
- TVS DIODE 7VWM 13.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J7.0C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features 7.0 V stand-off voltage (VWM), 12.0 V clamping voltage (VC) at 400 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform. Used in automotive sensor interfaces and industrial I/O protection where bidirectional transients occur.
For engineers reviewing the SMB8J7.0C-E3/52 datasheet, SMB8J7.0C-E3/52 pinout, SMB8J7.0C-E3/52 application, or SMB8J7.0C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin terminations, and thermal resistance (RθJA = 72 °C/W) for surface-mount reliability under repetitive surge stress.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 7.78–8.60 V at 10 mA test current and maximum reverse leakage (ID) ≤ 200 μA at 7.0 V. Its low incremental surge resistance enables rapid response to ESD and lightning-induced transients per IEC 61000-4-2/4-5.
Thermally, it sustains junction temperatures up to 150 °C and meets MSL level 1 per J-STD-020 (260 °C peak reflow). The glass-passivated junction and UL 94 V-0 molding compound ensure robustness in automotive and industrial environments requiring long-term reliability under thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system supply or signal swing. |
| VC @ IPPM | 12.0 V - Clamped voltage during 400 A 10/1000 µs surge; defines protected circuit's maximum transient exposure. |
| PPPM | 800 W - Peak pulse power handling capability; determines survivability against high-energy surges like ISO 7637-2 Pulse 1/2a/5a. |
| VBR min/max | 7.78 V / 8.60 V - Breakdown voltage range at 10 mA; ensures consistent turn-on threshold across production lots. |
| ID @ VWM | ≤ 200 μA - Reverse leakage at stand-off voltage; critical for low-power sensor lines to avoid signal distortion or battery drain. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance; informs PCB copper pad sizing (0.2" × 0.2") for sustained power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional device with no polarity marking - symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied across device. |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; thermal path relies on soldered leads to PCB copper pads (min. 5.0 mm × 5.0 mm per terminal). |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without polarity concerns. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, chassis, and ADAS modules where failure modes must meet stringent safety requirements. |
| Glass-passivated junction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives, reducing parameter drift over 15+ year lifetimes. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles (peak 260 °C), eliminating bake-out steps in high-volume SMT assembly. |
| UL 94 V-0 molding compound | Ensures flame retardancy in enclosed enclosures (e.g., engine control units), meeting automotive and industrial safety certifications. |
Applications
| Automotive Sensor Interfaces | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed directly at connector entry point to shunt surge energy before reaching MCU ADC or LIN transceiver. Use Value: Limits transient voltage to ≤12.0 V, preventing latch-up or gate oxide damage in downstream ASICs rated for 16 V absolute max. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Primary surge suppression element on each input line, coordinated with series impedance (e.g., 100 Ω resistor) to limit peak current. Use Value: Absorbs 800 W pulses without degradation, maintaining <200 μA leakage to preserve input logic thresholds across temperature. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Bidirectional protection of Ethernet PHY differential pairs (e.g., 10/100BASE-TX) against induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF at 0 V) placed adjacent to RJ-45 magnetics to minimize signal integrity impact. Use Value: Clamps common-mode transients to <12 V while preserving signal rise/fall times due to fast response (<1 ns) and symmetrical structure. |
Use Scenario: Shielding USB 2.0 D+/D− lines in portable devices from ESD events (>±8 kV contact per IEC 61000-4-2) during hot-plug insertion. IC Role / Device Role / Timing Role: Secondary ESD clamp after integrated port controller, handling bulk energy that exceeds on-die protection limits. Use Value: Survives >1000 ESD strikes at ±15 kV air discharge without parameter shift, verified by AEC-Q101 HBM testing. |
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 | Same VWM (7.0 V) and VC (12.0 V), but lower PPPM (600 W) and IPPM (300 A); non-AEC-Q101 commercial grade. | Limited to non-automotive industrial or consumer use where surge threat level is moderate (e.g., IEC 61000-4-4 Level 3). | Select when cost sensitivity outweighs automotive qualification and higher surge immunity is unnecessary. |
| SMCJ7.0CA | Same VWM/VC, but larger DO-214AB (SMC) package; higher PPPM (1500 W), IPPM (600 A), and RθJA (40 °C/W). | Better suited for high-reliability power rail protection (e.g., 24 V DC inputs) where board space allows larger footprint and thermal mass. | Choose when surge energy exceeds 800 W or ambient temperature exceeds 85 °C, requiring superior thermal dissipation. |
Compared with SMBJ7.0CA, SMB8J7.0C-E3/52 delivers 33% higher surge power rating and automotive qualification; versus SMCJ7.0CA, it trades 40% smaller PCB area for reduced thermal margin-making it optimal for space-constrained AEC-Q101 designs needing 800 W protection.
Availability
SMB8J7.0C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, telecom line interfaces, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMB8J7.0C-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, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J7.0C-E3/52 at its rated peak pulse current?
The SMB8J7.0C-E3/52 has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 12.0 V during surge events, protecting sensitive ICs such as microcontrollers and transceivers. The SMB8J7.0C-E3/52 maintains this clamping performance across its qualified operating temperature range.
Is SMB8J7.0C-E3/52 suitable for automotive applications?
Yes, SMB8J7.0C-E3/52 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD validation required for automotive electronics. Its construction-glass-passivated junction, UL 94 V-0 molding compound, and matte tin terminations-meets automotive environmental demands. The SMB8J7.0C-E3/52 is commonly deployed in body control modules, sensor hubs, and infotainment interfaces where bidirectional surge immunity is essential.
How does the bi-directional nature of SMB8J7.0C-E3/52 affect its placement in a circuit?
Because SMB8J7.0C-E3/52 is bi-directional and lacks polarity marking, it can be placed in either orientation across a signal or power line without affecting functionality-ideal for AC-coupled or floating nodes like CAN differential pairs or RS-485 buses. Unlike uni-directional TVS diodes, no cathode band alignment is needed, simplifying layout and reducing assembly errors. The SMB8J7.0C-E3/52 achieves symmetrical clamping in both directions, ensuring equal protection against positive and negative transients.
What is the thermal resistance of SMB8J7.0C-E3/52, and how does it impact PCB layout?
The SMB8J7.0C-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value dictates minimum copper area required to prevent thermal runaway during repeated surge events. To maintain reliability, designers must allocate adequate thermal relief-avoiding excessive trace length or narrow connections-and consider adding internal ground planes for enhanced heat spreading. The SMB8J7.0C-E3/52's RθJA is validated per JEDEC JESD51-2.
Does SMB8J7.0C-E3/52 meet RoHS and lead-free assembly requirements?
Yes, SMB8J7.0C-E3/52 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and compatibility with lead-free reflow soldering processes. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 1A whisker testing. The SMB8J7.0C-E3/52 is rated for peak reflow temperatures up to 260 °C (MSL Level 1), supporting standard Pb-free manufacturing without preconditioning or baking.
SMB8J7.0C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J7.0C-E3/52 FAQ
1.How can I place an order for SMB8J7.0C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0C-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 SMB8J7.0C-E3/52 reliable?
The price and inventory of SMB8J7.0C-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 SMB8J7.0C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.0C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0C-E3/52?
SMB8J7.0C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0C-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 SMB8J7.0C-E3/52?
For technical support, including SMB8J7.0C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0C-E3/52 requirements.
6.How does Aetrix verify that SMB8J7.0C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0C-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 SMB8J7.0C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.0C-E3/52?
All SMB8J7.0C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0C-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 SMB8J7.0C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.0C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0C-E3/52 Tags
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