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Vishay General Semiconductor - Diodes Division SMB8J11CA-E3/52
- Part No.:
- SMB8J11CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CA-E3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,319
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Product details
Overview
SMB8J11CA-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 11 V standoff voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V clamping voltage (VC) at 44 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 SMB8J11CA-E3/52 datasheet, SMB8J11CA-E3/52 pinout, SMB8J11CA-E3/52 application, or SMB8J11CA-E3/52 equivalent, this device is selected for robust ESD and lightning surge immunity in bidirectional AC-coupled or floating signal paths where low clamping ratio and AEC-Q101 qualification are mandatory.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of differential or ungrounded lines without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5 μA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device delivers 800 W peak pulse power handling under standardized 10/1000 μs transients, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W - confirming suitability for surface-mount PCB layouts with minimum 5.0 mm × 5.0 mm copper pads per terminal per Vishay's recommended mounting footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - precise voltage threshold at which avalanche conduction initiates, tightly controlled for predictable protection onset |
| VC (Clamping Voltage) | 18.2 V at IPPM = 44 A - maximum voltage seen by protected circuit during full-rated surge, critical for IC-level overvoltage margining |
| PPPM (Peak Pulse Power) | 800 W (10/1000 μs) - energy-handling capability defining survivability against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) |
| ID (Reverse Leakage) | ≤5 μA at VWM - negligible standby current ensuring no signal distortion or power loss in high-impedance sensor or communication lines |
| TJ max | 150 °C - maximum junction temperature enabling operation in under-hood automotive or enclosed industrial enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for placement on either side of differential traces or floating nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Symmetrical) | Bidirectional avalanche junction | No designated anode/cathode; identical electrical behavior in both directions - enables single-component protection of AC or floating signals |
| Terminal 1 | Lead 1 (cathode-marked end not applicable) | Connected to PCB trace requiring transient suppression; requires ≥5.0 mm × 5.0 mm copper pad for thermal dissipation per Vishay layout guidance |
| Terminal 2 | Lead 2 (mirror of Terminal 1) | Second connection point completing the two-terminal TVS path; must match same pad size and thermal relief as Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional architecture | Enables single-device protection of differential buses (e.g., RS-485, CAN FD) without polarity concerns or external diode pairing |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and body electronics subject to harsh thermal and vibration environments |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs - critical for 12 V rail protection where 18.2 V clamping stays within 30 V absolute maximum ratings |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity delays or baking requirements |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift across 150 °C operating range and lifetime temperature cycling |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: 18.2 V clamping prevents ADC saturation or latch-up during 100 V/50 ms load dump events, preserving measurement integrity. |
Use Scenario: Shielding RS-485 transceiver pins (A/B) against ESD and surge in factory automation PLC backplanes. IC Role / Device Role / Timing Role: Two SMB8J11CA-E3/52 devices placed line-to-line and line-to-ground to suppress common-mode and differential-mode transients. Use Value: 800 W PPPM rating meets IEC 61000-4-5 Level 3 (2 kV line-to-ground) without derating at 85 °C ambient. |
| Consumer USB-C Port | Smart Meter Communication Module |
|
Use Scenario: Safeguarding USB-C CC and SBU pins against contact ESD (±15 kV air, ±8 kV contact) per IEC 61000-4-2. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector footprint to minimize inductance and maximize ESD immunity. Use Value: Sub-100 ns response time and <5 μA leakage prevent signal integrity degradation on high-speed sideband use (SBU) channels. |
Use Scenario: Protecting HPLC (high-speed power line communication) modem PHY lines from grid-induced surges in smart electricity meters. IC Role / Device Role / Timing Role: TVS installed at line coupling transformer secondary to clamp induced transients before analog front-end amplifier. Use Value: 150 °C TJ max allows uninterrupted operation inside sealed meter housings reaching >90 °C ambient during summer peak loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA-E3/52 | Unchanged VWM/VBR/VC specs but rated for 600 W PPPM (vs. 800 W); same SMB package and AEC-Q101 qualification | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); insufficient for IEC 61000-4-5 Level 3+ surge | Select when system-level surge testing is limited to ESD-only requirements and cost optimization is prioritized |
| SMCJ11CA-E3/52 | Same electrical specs but in larger SMC (DO-214AB) package; higher PPPM = 1500 W; RθJA = 38 °C/W vs. 72 °C/W | Requires larger PCB area; better thermal performance enables sustained surge duty cycles in high-repetition environments | Choose when board space permits and repeated surge exposure (e.g., outdoor telecom) demands higher thermal margin |
Compared with SMBJ11CA-E3/52, SMB8J11CA-E3/52 provides 33 % higher surge power handling in identical footprint; versus SMCJ11CA-E3/52, it trades 47 % smaller board area for reduced thermal mass - making it optimal for space-constrained automotive modules needing Level 4 surge compliance.
Availability
SMB8J11CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, consumer USB-C interface hardening, and smart meter communication modules requiring stable component supply across multi-year production cycles.
Supply support for SMB8J11CA-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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® high-power TVS platform, engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment electronics where compact size and repeatable clamping performance are essential.
FAQ
What is the clamping voltage of SMB8J11CA-E3/52 at its rated peak pulse current?
The SMB8J11CA-E3/52 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 44 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits will not experience voltages exceeding 18.2 V during full-rated surge events - a key parameter for ensuring compatibility with 12 V and 15 V logic or analog ICs. The SMB8J11CA-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMB8J11CA-E3/52 suitable for automotive applications?
Yes, SMB8J11CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and chassis-mounted modules. Its construction includes a glass-passivated junction, MSL Level 1 moisture sensitivity rating, and guaranteed operation from –55 °C to +150 °C junction temperature - all validated per the AEC-Q101 stress test plan. The SMB8J11CA-E3/52 is commonly deployed in ADAS camera modules, battery management system voltage monitoring, and engine control unit sensor inputs.
How does SMB8J11CA-E3/52 differ from unidirectional variants like SMB10J11A-E3/52?
The SMB8J11CA-E3/52 is bidirectional with symmetrical avalanche characteristics in both polarities, whereas SMB10J11A-E3/52 is unidirectional and conducts only in reverse bias - requiring correct orientation during placement and offering no protection against positive-going transients on grounded lines. The SMB8J11CA-E3/52 eliminates polarity concerns in differential or floating systems, while SMB10J11A-E3/52 provides higher 1000 W PPPM for single-polarity DC rails. Their VWM, VBR, and VC values are closely matched, but conduction behavior and application topology differ fundamentally.
What is the recommended PCB pad layout for SMB8J11CA-E3/52?
Vishay specifies a minimum pad size of 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal for SMB8J11CA-E3/52 to achieve rated thermal and surge performance. The SMB (DO-214AA) outline drawing confirms terminal width of 0.084–0.096" (2.13–2.44 mm), so pads must fully accommodate these dimensions with adequate solder mask clearance. Thermal vias under pads are not required but improve reliability in high-duty-cycle surge environments. The SMB8J11CA-E3/52 datasheet Figure 2 provides derating curves dependent on this exact pad layout.
Does SMB8J11CA-E3/52 meet RoHS and halogen-free requirements?
Yes, the "E3" suffix in SMB8J11CA-E3/52 denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads. It satisfies EU RoHS Directive 2011/65/EU and is not halogen-free - for halogen-free compliance, the HM3-suffixed variant (e.g., SMB8J11CA-HM3/52) must be selected. Both versions meet JESD 201 Class 2 whisker resistance and J-STD-002 solderability standards, and the SMB8J11CA-E3/52 is rated for lead-free reflow peak temperatures up to 260 °C.
SMB8J11CA-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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 44A
- 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)
SMB8J11CA-E3/52 FAQ
1.How can I place an order for SMB8J11CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CA-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 SMB8J11CA-E3/52 reliable?
The price and inventory of SMB8J11CA-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 SMB8J11CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J11CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CA-E3/52?
SMB8J11CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CA-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 SMB8J11CA-E3/52?
For technical support, including SMB8J11CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J11CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J11CA-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 SMB8J11CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J11CA-E3/52?
All SMB8J11CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CA-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 SMB8J11CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J11CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CA-E3/52 Tags
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