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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHE3/5B
- Part No.:
- SMB8J7.0CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHE3/5B.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,195
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Product details
Overview
SMB8J7.0CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.0CAHE3/5B datasheet, SMB8J7.0CAHE3/5B pinout, SMB8J7.0CAHE3/5B application, or SMB8J7.0CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.71), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, SMB8J7.0CAHE3/5B supports automotive-grade reliability with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VC @ IPPM | 12.0 V at 400 A - clamping voltage limits downstream IC stress during 10/1000 µs surge |
| PPPM | 800 W - peak transient power dissipation capability under standardized surge waveform |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - breakdown voltage window ensures consistent turn-on threshold |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor circuits |
| TJ max | +150 °C - enables placement near heat-generating components in engine control units |
| RθJA | 72 °C/W - thermal resistance defines derating curve for sustained surge duty cycles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band omitted (bidirectional type has no polarity marking).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional conduction path | Either terminal serves as input/output - no polarity dependency for AC or differential line protection |
| Case (exposed metal slug) | Thermal and mechanical anchor | Directly bonded to PCB copper pad for enhanced heat dissipation and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including powertrain and ADAS sensor modules |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| MSL Level 1 | Enables standard reflow without pre-baking, reducing manufacturing complexity |
| UL 94 V-0 molding compound | Meets flammability requirements for enclosed automotive and industrial enclosures |
| Matte tin plating | Guarantees solder joint reliability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Automotive Sensor Protection | Industrial PLC I/O |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector interface to clamp ±20 kV ESD and 100 V/50 ms load-dump surges before they reach signal conditioning ICs. Use Value: 12.0 V clamping ensures downstream op-amps and ADCs remain within absolute maximum ratings during ISO 7637-2 Pulse 5a transients. | Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to shunt fast-rising transients (<1 ns rise time) induced by relay coil de-energization. Use Value: 800 W PPPM rating sustains repeated 1 kV/500 A surges per IEC 61000-4-5 Level 4 without degradation. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protector on differential pairs, working with GDTs or polymer PTCs in hybrid protection schemes. Use Value: Symmetrical bidirectional clamping maintains common-mode rejection while limiting differential overvoltage to <12 V peak. | Use Scenario: Securing microcontroller GPIOs and display driver lines in washing machines and HVAC systems against motor-commutation spikes. IC Role / Device Role / Timing Role: Localized TVS adjacent to connectors and motor drivers to prevent latch-up or gate oxide damage in 3.3 V/5 V logic. Use Value: 1.0 µA leakage at 7.0 V avoids measurable current draw in battery-backed real-time clock circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CA-E3/5B | Commercial-grade version; lacks AEC-Q101 qualification and halogen-free certification | Suitable for non-automotive industrial or consumer use where automotive reliability not mandated | Select when cost sensitivity outweighs automotive qualification requirements |
| SMBJ7.0CAHE3/5B | Same VWM/VC specs but rated for 1000 W PPPM (unidirectional); bidirectional variant not offered | Requires redesign for unidirectional-only paths; incompatible with AC/differential line protection | Choose only if circuit topology permits unidirectional placement and higher power handling is needed |
Compared with SMB8J7.0CAHE3/5B, the alternative SMB8J7.0CA-E3/5B offers identical electrical performance but omits automotive qualification, while SMBJ7.0CAHE3/5B provides higher power rating yet sacrifices bidirectionality - making SMB8J7.0CAHE3/5B uniquely suited for space-constrained, AEC-Q101-compliant bidirectional protection.
Availability
SMB8J7.0CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J7.0CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
SMB8J7.0CAHE3/5B belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes engineered specifically for robust transient suppression in harsh environments - especially automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB8J7.0CAHE3/5B at its rated peak pulse current?
The SMB8J7.0CAHE3/5B has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A under the standard 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads), ensuring predictable overvoltage limiting for protected downstream circuitry.
Is SMB8J7.0CAHE3/5B suitable for automotive applications?
Yes, SMB8J7.0CAHE3/5B is AEC-Q101 qualified and carries the "HE3" suffix denoting RoHS-compliant, automotive-grade construction. It meets stringent requirements for temperature cycling, humidity resistance, and surge endurance - making it appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under vibration and thermal stress is critical.
What does the "5B" in SMB8J7.0CAHE3/5B indicate?
The "5B" in SMB8J7.0CAHE3/5B specifies the packaging format: 13-inch diameter plastic tape and reel containing 3200 units. This delivery mode supports high-volume automated SMT placement and aligns with industry-standard reel dimensions used in modern electronics assembly lines.
How does SMB8J7.0CAHE3/5B differ from unidirectional variants like SMBJ7.0AHE3/5B?
SMB8J7.0CAHE3/5B is bidirectional with symmetrical clamping for AC or differential signals, whereas SMBJ7.0AHE3/5B is unidirectional and optimized for DC rail protection. The "C" in SMB8J7.0CAHE3/5B explicitly denotes bidirectionality, and its 800 W PPPM rating reflects derating for dual-polarity conduction versus the 1000 W rating of unidirectional SMBJ parts.
What is the thermal resistance junction-to-ambient for SMB8J7.0CAHE3/5B?
The typical thermal resistance junction-to-ambient (RθJA) for SMB8J7.0CAHE3/5B is 72 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value governs derating curves for repetitive surge events and must be applied when calculating safe operating area under elevated ambient temperatures.
SMB8J7.0CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 66.7A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.0CAHE3/5B FAQ
1.How can I place an order for SMB8J7.0CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHE3/5B 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 SMB8J7.0CAHE3/5B reliable?
The price and inventory of SMB8J7.0CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.0CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHE3/5B?
SMB8J7.0CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHE3/5B 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 SMB8J7.0CAHE3/5B?
For technical support, including SMB8J7.0CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J7.0CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHE3/5B 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 SMB8J7.0CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHE3/5B?
All SMB8J7.0CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHE3/5B, 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 SMB8J7.0CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHE3/5B Tags
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