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Vishay General Semiconductor - Diodes Division SMB8J7.0CA-E3/52
- Part No.:
- SMB8J7.0CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CA-E3/52.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,575
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Product details
Overview
SMB8J7.0CA-E3/52 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 - used to safeguard automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and load dump transients.
For engineers reviewing the SMB8J7.0CA-E3/52 datasheet, SMB8J7.0CA-E3/52 pinout, SMB8J7.0CA-E3/52 application, or SMB8J7.0CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.71), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 7.0 V), then rapidly avalanches below 1 ns to divert surge energy when reverse voltage exceeds its 7.78–8.60 V breakdown range (VBR at 10 mA). Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints.
Thermal design relies on RθJL = 20 °C/W junction-to-lead resistance and RθJA = 72 °C/W junction-to-ambient rating (on 5.0 mm × 5.0 mm pads), supporting continuous operation up to TJ = 150 °C. The glass-passivated silicon junction ensures stable performance across -55 °C to +150 °C ambient range and meets J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin for 5 V or 6 V logic/sensor rails. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - guaranteed avalanche onset window; ensures consistent triggering across production lots. |
| VC @ IPPM | 12.0 V at 400 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress to ≤12 V during worst-case transients. |
| PPPM | 800 W - peak pulse power handling per 10/1000 µs waveform; supports ISO 7637-2 Pulse 1/2/5a compliance in automotive environments. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off; avoids signal distortion or bias shift in high-impedance analog/sensor paths. |
| TJ max | +150 °C - maximum junction temperature; enables deployment in under-hood automotive ECUs and industrial motor drives. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking on one end; dimensions 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); UL 94 V-0 molding compound; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward conduction mode | Used only during positive half-cycle surges in bidirectional operation; connects to protected line or ground return path. |
| Cathode (banded end) | Current exit point in forward conduction mode | Identified by molded band; ties to reference node (e.g., chassis ground or common rail) to establish clamping reference. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled, differential, or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity-sensitive layout. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS camera links, and body electronics requiring zero field failure risk. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on downstream ICs compared to alternatives with ratios >2.0, improving system-level surge margin. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard reflow profiles up to 260 °C peak temperature. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage parameters under thermal cycling and humidity exposure in harsh environments. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensors connected to 12 V vehicle battery rails subject to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Shunt TVS device clamping transients to <12 V within nanoseconds to prevent damage to 5 V tolerant sensor ASICs and microcontrollers. Use Value: Enables robust operation in ASIL-B systems without additional filtering or derating, leveraging AEC-Q101 qualification and 800 W surge capacity. | Use Scenario: Safeguarding PLC digital input modules exposed to inductive switching noise from solenoids and contactors in factory automation. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input terminals to absorb ±1 kV EFT bursts (IEC 61000-4-4) and 100 A surge currents. Use Value: Eliminates need for external series resistors or RC filters while maintaining fast response (<1 ns) and low leakage (<1 µA) for accurate logic-level detection. |
| Telecom Line Driver Protection | Consumer Audio Signal Path |
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from lightning-induced surges on outdoor cabling per IEC 61000-4-5 Level 3 (4 kV). IC Role / Device Role / Timing Role: Primary shunt protector located at board edge before transformer; clamps common-mode transients between pairs and chassis ground. Use Value: Maintains signal integrity with <12 pF typical junction capacitance at 0 V bias, avoiding bandwidth degradation in 100BASE-TX applications. | Use Scenario: Guarding headphone amplifier outputs and microphone inputs in portable speakers against ESD events during user handling (IEC 61000-4-2 ±8 kV contact). IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector pins to shunt ESD current before reaching sensitive CMOS input stages. Use Value: Provides sub-1 ns response with <1 µA leakage at 7.0 V, preserving audio SNR and eliminating DC offset drift in bias networks. |
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 | Unidirectional variant (SMBJ series) with same VWM/VBR/VC but single-polarity clamping; 1000 W PPPM rating. | Suitable only for DC-biased lines where polarity is fixed; not usable on AC or differential signals. | Select SMBJ7.0CA-E3/52 only when protecting unidirectional power rails or single-ended logic with known polarity. |
| SMCJ7.0CA-E3/52 | Larger SMC (DO-214AB) package; same electrical specs but higher 1500 W PPPM and lower RθJA (40 °C/W). | Requires larger PCB area; better suited for high-power industrial motor drives where thermal dissipation is critical. | Choose SMCJ7.0CA-E3/52 when surge energy exceeds 800 W or board layout allows 7.11 mm × 6.22 mm footprint. |
Compared with SMBJ7.0CA-E3/52 and SMCJ7.0CA-E3/52, SMB8J7.0CA-E3/52 offers optimal balance of bidirectional capability, compact SMB footprint, and AEC-Q101 qualification - making it the preferred choice for space-constrained automotive and industrial signal-line protection where polarity independence is required.
Availability
SMB8J7.0CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O modules, telecom line drivers, and consumer audio signal paths requiring stable component supply and full traceability.
Supply support for SMB8J7.0CA-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 for high-power-density transient suppression in automotive, industrial, and communications systems - prioritizing fast response, low clamping, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMB8J7.0CA-E3/52 at its rated peak pulse current?
The SMB8J7.0CA-E3/52 has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and guarantees that downstream circuitry will not experience more than 12.0 V during surge events, provided the SMB8J7.0CA-E3/52 is mounted per the recommended 5.0 mm × 5.0 mm copper pad layout.
Is SMB8J7.0CA-E3/52 suitable for automotive applications?
Yes, SMB8J7.0CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and validation across HTOL, temperature cycling, and ESD tests per AEC requirements. The SMB8J7.0CA-E3/52 is commonly deployed in engine control units, ADAS camera modules, and body electronics where robust transient immunity is mandatory.
How does the bidirectional configuration of SMB8J7.0CA-E3/52 affect its circuit implementation?
The bidirectional configuration of SMB8J7.0CA-E3/52 means it conducts symmetrically in both polarities - ideal for protecting AC-coupled, differential, or floating nodes like RS-485 buses, CAN lines, or audio signal pairs. Unlike unidirectional TVS diodes, SMB8J7.0CA-E3/52 requires no polarity awareness during placement and provides identical clamping behavior for positive and negative transients, simplifying layout and reducing BOM count.
What is the maximum operating temperature for SMB8J7.0CA-E3/52?
The SMB8J7.0CA-E3/52 has a maximum junction temperature (TJ max) of +150 °C and an operating ambient range of -55 °C to +150 °C. Its thermal resistance values - RθJL = 20 °C/W and RθJA = 72 °C/W (on 5.0 mm × 5.0 mm pads) - allow reliable operation in under-hood automotive environments and industrial enclosures without forced cooling, provided PCB copper area meets minimum recommendations.
Does SMB8J7.0CA-E3/52 meet RoHS and halogen-free requirements?
Yes, SMB8J7.0CA-E3/52 carries the "E3" suffix indicating RoHS-compliant construction with matte tin-plated leads and halogen-free molding compound per IEC 61249-2-21. It satisfies both EU RoHS Directive 2011/65/EU and Vishay's material categorization standard (Doc. #99912), making it suitable for environmentally regulated markets including automotive and industrial equipment sold in Europe and Asia.
SMB8J7.0CA-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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.0CA-E3/52 FAQ
1.How can I place an order for SMB8J7.0CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CA-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 SMB8J7.0CA-E3/52 reliable?
The price and inventory of SMB8J7.0CA-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 SMB8J7.0CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CA-E3/52?
SMB8J7.0CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CA-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 SMB8J7.0CA-E3/52?
For technical support, including SMB8J7.0CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J7.0CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CA-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 SMB8J7.0CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CA-E3/52?
All SMB8J7.0CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CA-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 SMB8J7.0CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.0CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CA-E3/52 Tags
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