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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHE3/52
- Part No.:
- SMB8J7.0CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHE3/52.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,143
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Product details
Overview
SMB8J7.0CAHE3/52 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 - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power rails.
For engineers reviewing the SMB8J7.0CAHE3/52 datasheet, SMB8J7.0CAHE3/52 pinout, SMB8J7.0CAHE3/52 application, or SMB8J7.0CAHE3/52 equivalent, key selection criteria include AEC-Q101 qualification, bidirectional symmetry, low clamping ratio (VC/VWM = 1.71), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads per JEDEC standard.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism with glass-passivated junction. Its bidirectional structure enables symmetrical suppression of positive and negative transients without polarity sensitivity, supporting robust protection in AC-coupled or floating signal paths.
Designed for operation across -55 °C to +150 °C junction temperature range, it delivers stable clamping performance under repetitive surge stress when mounted per recommended 0.2" × 0.2" copper pad layout. Thermal resistance (RθJA = 72 °C/W) and RθJL = 20 °C/W ensure effective heat dissipation during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin in protected circuit. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Breakdown voltage range ensures reliable turn-on within specification tolerance under standardized test conditions. |
| VC @ IPPM | 12.0 V at 400 A - Clamping voltage limits downstream component stress during worst-case 10/1000 µs surge; critical for MOSFET gate or IC I/O protection. |
| PPPM | 800 W - Peak pulse power handling capability with 10/1000 µs waveform; determines survivability against ISO 7637-2 Pulse 1/2/5a/b surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; ensures minimal quiescent power loss and signal integrity in high-impedance nodes. |
| TJ max | +150 °C - Maximum junction temperature rating supports under-hood automotive deployment and industrial environments with elevated ambient. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; enables use in ASIL-B systems. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; no cathode band - enables flexible PCB layout without orientation constraints. |
| Cathode (not marked) | Reference node for unidirectional variants | Not applicable to SMB8J7.0CAHE3/52; this part has no polarity marking and must not be substituted with unidirectional equivalents like SMB10J7.0A. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and body electronics requiring long-term reliability under thermal cycling and vibration. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage exposure to downstream ICs - e.g., keeps 3.3 V or 5 V logic inputs below absolute maximum ratings during 400 A surge. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates pre-bake requirement in standard SMT lines. |
| Glass-passivated junction | Provides stable breakdown characteristics and long-term parameter consistency across temperature and lifetime, critical for safety-critical systems. |
| 800 W PPPM with 10/1000 µs waveform | Meets ISO 7637-2 Pulse 5a (load dump) immunity requirements for 12 V automotive systems up to 35 V clamp threshold. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN or SENT sensor outputs (e.g., pressure, temperature) from battery feed transients and ESD in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing ±25 kV contact ESD and load-dump energy. Use Value: Prevents latch-up or damage to microcontroller analog front-end while maintaining signal fidelity due to sub-1 µA leakage at 7.0 V. |
Use Scenario: Shielding CANH/CANL differential pair in industrial PLCs against induced surges from motor drives or relay switching. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) limiting common-mode transients to <12 V, preserving CAN physical layer timing margins. Use Value: Ensures >10,000 surge cycles without degradation, meeting IEC 61000-4-5 Level 3 (2 kV) immunity with no communication interruption. |
| USB Type-C Port Protection | DC Power Rail Clamp |
Use Scenario: Safeguarding USB-C CC and SBU pins against hot-plug ESD and cable-induced fast transients in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp placed directly at connector, minimizing stub length. Use Value: Maintains USB 2.0 signal integrity (≤1.5% eye distortion) while suppressing ±15 kV air discharge per IEC 61000-4-2. |
Use Scenario: Clamping 12 V or 24 V DC input rails in industrial HMIs against inductive kickback from solenoid drivers or relay coils. IC Role / Device Role / Timing Role: Primary overvoltage limiter placed upstream of DC-DC converter input, diverting surge current away from regulator IC. Use Value: Limits rail excursion to ≤12.0 V during 400 A transient, preventing brownout or reset of downstream microcontrollers. |
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-E3/52 | Same SMB package and VWM (7.0 V), but lower PPPM (600 W) and IPPM (34.1 A); non-AEC-Q101 rated. | Limited to commercial-grade consumer or computing applications; unsuitable for automotive or harsh-environment deployments. | Select only if AEC-Q101 compliance and 800 W surge capacity are not required. |
| SMCJ7.0CA-13-F | Same VWM and bidirectional function, but larger SMC (DO-214AB) package; higher PPPM (1500 W), IPPM (69.4 A), and RθJA (35 °C/W). | Better thermal performance and surge margin, but requires larger PCB area and may not fit space-constrained automotive modules. | Choose when higher surge endurance is needed and board space allows SMC footprint. |
Compared with SMBJ7.0CA-E3/52, SMB8J7.0CAHE3/52 provides 33% higher peak power handling and automotive qualification; versus SMCJ7.0CA-13-F, it trades 45% smaller footprint for 47% lower surge rating - enabling compact, AEC-Q101-compliant designs where 800 W suffices.
Availability
SMB8J7.0CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, USB-C interface safeguarding, and DC power rail clamping requiring stable component supply across production lifecycles.
Supply support for SMB8J7.0CAHE3/52 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for AEC-Q101-compliant transient suppression in space-constrained automotive and industrial control systems.
FAQ
What is the clamping voltage of SMB8J7.0CAHE3/52 at its rated peak pulse current?
The SMB8J7.0CAHE3/52 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 ensures predictable overvoltage limiting during surge events - a critical parameter for protecting downstream 3.3 V or 5 V logic circuits without exceeding their absolute maximum ratings. The SMB8J7.0CAHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMB8J7.0CAHE3/52 suitable for automotive applications?
Yes, SMB8J7.0CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix, indicating RoHS-compliant and AEC-Q101-qualified construction. It meets stress test requirements including high-temperature operating life (HTOL), temperature cycling (TCT), and ESD immunity - making it appropriate for engine control units, ADAS camera modules, and body electronics. The SMB8J7.0CAHE3/52 operates reliably from -55 °C to +150 °C junction temperature, supporting under-hood deployment.
How does SMB8J7.0CAHE3/52 differ from unidirectional variants like SMB10J7.0A?
SMB8J7.0CAHE3/52 is bidirectional with symmetrical breakdown behavior and no polarity marking, whereas SMB10J7.0A is unidirectional with a cathode band and forward conduction capability. Their electrical parameters also differ: SMB8J7.0CAHE3/52 offers 800 W PPPM and 400 A IPPM, while SMB10J7.0A provides 1000 W PPPM and 83.3 A IPPM. Substituting one for the other risks incorrect clamping behavior or failure to suppress negative transients - the SMB8J7.0CAHE3/52 must be used only in bidirectional protection roles.
What is the thermal resistance of SMB8J7.0CAHE3/52, and how does it affect layout design?
The SMB8J7.0CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values require adherence to Vishay's recommended pad layout to achieve rated surge performance - reducing pad size increases thermal impedance and risks junction overheating during repetitive surges. The SMB8J7.0CAHE3/52 must not be deployed on undersized land patterns without derating analysis.
Does SMB8J7.0CAHE3/52 have moisture sensitivity level (MSL) rating, and what does it mean for assembly?
Yes, SMB8J7.0CAHE3/52 meets MSL Level 1 per J-STD-020, with a maximum lead-free reflow peak temperature of 260 °C. This means the device can be processed in standard SMT reflow ovens without preconditioning or baking - eliminating moisture-related popcorning risk and simplifying manufacturing. The SMB8J7.0CAHE3/52's glass-passivated junction and matte tin plating further ensure solder joint reliability and long-term parameter stability post-assembly.
SMB8J7.0CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMB8J7.0CAHE3/52 FAQ
1.How can I place an order for SMB8J7.0CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHE3/52 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 SMB8J7.0CAHE3/52 reliable?
The price and inventory of SMB8J7.0CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.0CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHE3/52?
SMB8J7.0CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHE3/52 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 SMB8J7.0CAHE3/52?
For technical support, including SMB8J7.0CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J7.0CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHE3/52 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 SMB8J7.0CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHE3/52?
All SMB8J7.0CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHE3/52, 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 SMB8J7.0CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHE3/52 Tags
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