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Vishay General Semiconductor - Diodes Division SMB8J7.5CA-E3/52
- Part No.:
- SMB8J7.5CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CA-E3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,332
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Product details
Overview
SMB8J7.5CA-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 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage (VC) at 200 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 SMB8J7.5CA-E3/52 datasheet, SMB8J7.5CA-E3/52 pinout, SMB8J7.5CA-E3/52 application, or SMB8J7.5CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (1.72), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance during positive and negative transients. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables effective energy diversion without thermal runaway under repetitive surges.
The device meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 150 °C maximum junction temperature, and achieves 62.0 A peak pulse current rating at 7.5 V stand-off - validated under standardized 10/1000 µs waveform conditions per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping initiates; sets minimum system operating margin. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 12.9 V at 200 A - Clamped voltage seen by protected circuit during full-rated 10/1000 µs surge; defines worst-case stress level. |
| PPPM | 800 W - Peak transient power dissipation capacity; determines survivability against lightning-induced or inductive-switching surges. |
| IPPM | 200 A - Maximum non-repetitive surge current the device can safely clamp without degradation. |
| Junction Temp. Range | –55 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments with wide thermal cycling. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per stress test plan. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminal design allows orientation-agnostic PCB placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically as clamping nodes; no cathode band - eliminates orientation dependency in layout. |
| Case (body) | Thermal and mechanical interface | Plastic molded case provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads (0.2" × 0.2" recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage (<1.0 µA), and long-term reliability under thermal cycling. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes voltage overshoot during surge events - critical for protecting 3.3 V or 5 V logic interfaces. |
| MSL Level 1 compliance | Supports standard lead-free reflow profiles up to 260 °C peak without preconditioning or baking. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamping element placed directly at connector entry point. Use Value: Limits transient voltage to ≤12.9 V during 200 A surges, preserving transceiver integrity without adding series impedance. |
Use Scenario: Safeguarding PLC analog input channels (4–20 mA, 0–10 V) against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted adjacent to terminal block. Use Value: Absorbs 800 W surges within 10/1000 µs profile, preventing damage to precision ADCs and op-amps downstream. |
| Consumer USB Interface Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Shielding USB 2.0 D+/D– lines in set-top boxes and smart displays from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed between connector and USB PHY. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) with sub-1 ns response, maintaining signal integrity below 10 pF. |
Use Scenario: Protecting Ethernet PHYs and POTS line interfaces in DSLAMs and base station equipment. IC Role / Device Role / Timing Role: Secondary-level surge protector cascaded after gas discharge tube (GDT) primary stage. Use Value: Provides precise 12.9 V clamping to limit let-through voltage to PHY ICs rated for ≤16 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA-E3/52 | Unchanged VWM/VC, but rated for 1000 W PPPM (unidirectional only); not bidirectional. | Limited to DC-biased or unidirectional signal paths; unsuitable for AC or floating lines. | Select SMBJ7.5CA-E3/52 only when unidirectional clamping suffices and higher 1000 W rating is required. |
| SMCJ7.5CA-E3/52 | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM and lower RθJA (40 °C/W). | Requires more PCB area; better suited for high-repetition-rate surges or elevated ambient temperatures. | Choose SMCJ7.5CA-E3/52 when thermal management or >800 W surge handling is critical and board space permits. |
Compared with SMBJ7.5CA-E3/52 and SMCJ7.5CA-E3/52, SMB8J7.5CA-E3/52 uniquely balances bidirectional operation, AEC-Q101 qualification, and compact SMB footprint - making it optimal for space-constrained automotive and industrial signal-line protection where polarity-agnostic clamping is mandatory.
Availability
SMB8J7.5CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line card surge suppression requiring stable component supply across production lifecycles.
Supply support for SMB8J7.5CA-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 and application-specific performance.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and harsh-environment industrial systems.
FAQ
What is the clamping voltage of SMB8J7.5CA-E3/52 at its rated peak pulse current?
The SMB8J7.5CA-E3/52 exhibits a maximum clamping voltage (VC) of 12.9 V when subjected to its rated 200 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured and guaranteed per the Vishay datasheet revision 09-Jan-2024, Document Number 88422, and defines the upper voltage limit imposed on protected circuits during surge events. The SMB8J7.5CA-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMB8J7.5CA-E3/52 suitable for automotive applications?
Yes, SMB8J7.5CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and body electronics. Its construction includes glass-passivated junctions, matte tin-plated leads compliant with JESD 22-B102, and MSL Level 1 reflow capability - all validated per the AEC-Q101 stress test plan. The SMB8J7.5CA-E3/52 datasheet confirms qualification status in the Mechanical Data section.
What does the "CA" suffix indicate in SMB8J7.5CA-E3/52?
The "CA" suffix in SMB8J7.5CA-E3/52 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This distinguishes it from unidirectional variants (e.g., SMB8J7.5A), which suppress only one polarity and require correct cathode orientation. The SMB8J7.5CA-E3/52 has no polarity marking and may be placed in either direction on the PCB.
What is the maximum operating temperature for SMB8J7.5CA-E3/52?
The SMB8J7.5CA-E3/52 has a specified operating junction and storage temperature range of –55 °C to +150 °C. This maximum junction temperature of +150 °C enables reliable operation in under-hood automotive environments and high-ambient industrial settings. Thermal derating curves in the datasheet show pulse power capability decreases linearly above 25 °C ambient, with 50% derating at 125 °C ambient for continuous operation.
How does SMB8J7.5CA-E3/52 differ from SMBJ7.5CA-E3/52?
SMB8J7.5CA-E3/52 is bidirectional with 800 W peak pulse power (PPPM) and 200 A peak pulse current (IPPM), whereas SMBJ7.5CA-E3/52 is unidirectional with 1000 W PPPM and 100 A IPPM. The SMB8J7.5CA-E3/52 also carries AEC-Q101 qualification and uses the same SMB (DO-214AA) package. These differences make SMB8J7.5CA-E3/52 appropriate for AC-coupled or floating lines, while SMBJ7.5CA-E3/52 suits DC-biased applications needing higher unidirectional surge capacity.
SMB8J7.5CA-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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
SMB8J7.5CA-E3/52 FAQ
1.How can I place an order for SMB8J7.5CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CA-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 SMB8J7.5CA-E3/52 reliable?
The price and inventory of SMB8J7.5CA-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 SMB8J7.5CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CA-E3/52?
SMB8J7.5CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CA-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 SMB8J7.5CA-E3/52?
For technical support, including SMB8J7.5CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J7.5CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CA-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 SMB8J7.5CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CA-E3/52?
All SMB8J7.5CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CA-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 SMB8J7.5CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.5CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CA-E3/52 Tags
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Diodes Incorporated
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Diodes Incorporated
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