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Vishay General Semiconductor - Diodes Division SMBJ11CA-E3/52
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- Part No.:
- SMBJ11CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CA-E3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:23,931
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Product details
Overview
SMBJ11CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 11 V stand-off voltage (VWM), 18.2 V maximum clamping voltage (VC) at 33.0 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ11CA-E3/52 datasheet, SMBJ11CA-E3/52 pinout, SMBJ11CA-E3/52 application, or SMBJ11CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.65), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification availability - all critical for robust ESD and surge protection in automotive-grade and high-reliability embedded systems.
Technical Context
This TVS diode operates symmetrically in both directions, with breakdown voltage (VBR) specified between 12.2 V (min) and 13.5 V at 1.0 mA test current, and reverse leakage current ≤5.0 µA at 11 V stand-off. Its fast response time (<1.0 ns) and low incremental surge resistance enable effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The device uses a glass-passivated silicon junction and is rated for continuous operation from –55 °C to +150 °C junction temperature. Thermal resistance from junction-to-ambient is 100 °C/W (typical), requiring appropriate PCB copper pad area (0.2" × 0.2") to sustain its 600 W pulse rating under repetitive 0.01% duty cycle conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VC (Clamping Voltage) | 18.2 V at 33.0 A - Peak voltage seen by protected circuit during 10/1000 µs surge; ensures downstream components remain within safe voltage limits. |
| IPPM (Peak Pulse Current) | 33.0 A - Maximum non-repetitive surge current the device can safely divert without degradation. |
| PPPM (Peak Pulse Power) | 600 W - Energy-handling capacity for transient suppression; validated per 10/1000 µs waveform per ANSI/IEEE C62.35. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in high-ambient environments such as motor drives and base stations. |
| Package | SMB (DO-214AA) - Surface-mount package with 2.2 mm profile; compatible with automated pick-and-place and reflow soldering per J-STD-020 MSL Level 1. |
| Leakage Current | ≤5.0 µA at VWM - Low standby power loss and minimal interference with high-impedance signal paths. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; both ends function identically in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge current input/output terminal | Both terminals accept transient energy equally; no orientation required during placement - simplifies layout and eliminates polarity errors. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN, USB D+/D−) without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity when properly laid out with minimum 5.0 mm × 5.0 mm copper pads per terminal. |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage stress on protected ICs - critical for 12 V rail protection where headroom above VWM is limited. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and enables standard lead-free reflow profiles - reduces manufacturing complexity and cost. |
| AEC-Q101 qualified option available | HE3 suffix variants meet automotive-grade reliability requirements for engine control, body electronics, and ADAS sensor interfaces. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback signal lines against switching-induced transients in 24 V DC motor controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across isolated signal inputs (e.g., current sense amplifier inputs) to clamp ±1 kV surges without disrupting analog integrity. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADCs while maintaining <5 µA leakage at 11 V operating point. |
Use Scenario: ESD and load-dump protection on LIN bus or analog sensor outputs (e.g., temperature, pressure) in passenger compartment modules. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on sensor harness entry points, operating alongside local RC filtering. Use Value: Withstands 30 kV contact ESD (IEC 61000-4-2) and 12 V load-dump spikes up to 60 V/400 ms - meets ISO 16750-2 requirements. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Secondary surge protection on 48 V PoE-powered Ethernet switch ports downstream of primary GDT-based protection. IC Role / Device Role / Timing Role: Fast-response clamping element limiting voltage overshoot during induced lightning surges on data/power pairs. Use Value: Clamps to 18.2 V within <1 ns, preventing damage to PHY transceivers and isolating transformers rated for 25 V max working voltage. |
Use Scenario: Bidirectional overvoltage protection on USB-C CC and SBU lines exposed to hot-plug and cable ESD events. IC Role / Device Role / Timing Role: Standalone TVS placed directly at connector, guarding against ±15 kV air discharge per IEC 61000-4-2. Use Value: Low 11 V VWM avoids interfering with USB-C logic thresholds (0.2–0.8 V common-mode), while 18.2 V VC stays below USB PD fault limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same thermal and clamping performance. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Direct drop-in replacement for SMBJ11CA-E3/52 where halogen-free materials are required - no layout or validation changes needed. |
| SMCJ11CA-E3/52 | Same VWM (11 V) and VC (18.2 V), but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (59.3 A). | Used where higher surge energy handling is required - e.g., outdoor telecom enclosures or industrial PLC backplanes with longer trace inductance. | Select when system-level surge testing exceeds 600 W; requires PCB footprint change due to larger 7.11 mm × 6.22 mm SMC package vs. 4.57 mm × 3.94 mm SMB. |
Compared with SMBJ11CA-E3/52, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ11CA-E3/52 delivers 2.5× higher surge power handling at the cost of increased board space - enabling scalable protection architecture across product tiers.
Availability
SMBJ11CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ11CA-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 SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in space-constrained, high-volume applications including automotive, industrial automation, and communications infrastructure.
FAQ
What is the clamping voltage of SMBJ11CA-E3/52 at its rated peak pulse current?
The SMBJ11CA-E3/52 has a maximum clamping voltage (VC) of 18.2 V at 33.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage imposed on the protected circuit during worst-case surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ11CA-E3/52 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBJ11CA-E3/52 suitable for automotive applications?
The SMBJ11CA-E3/52 itself is commercial-grade, but Vishay offers an AEC-Q101 qualified version under the ordering code SMBJ11CAHE3_B/H (or similar HE3-suffixed variants). That qualified part shares identical electrical characteristics - including 11 V VWM, 18.2 V VC, and 600 W PPPM - while meeting automotive reliability requirements for temperature cycling, humidity, and mechanical shock. For automotive designs, specify the HE3 suffix; the SMBJ11CA-E3/52 is intended for industrial and consumer use unless upgraded to the AEC-Q101 variant.
How does the bidirectional nature of SMBJ11CA-E3/52 affect PCB layout?
The SMBJ11CA-E3/52 has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This allows unrestricted routing on differential or AC-coupled lines - for example, placing a single SMBJ11CA-E3/52 across RS-485 A/B terminals or USB-C SBU1/SBU2 without concern for anode/cathode alignment. Layout benefits include reduced assembly errors, simplified silkscreen, and compatibility with automated optical inspection (AOI) systems that do not require polarity verification. The SMBJ11CA-E3/52's symmetrical behavior is confirmed in Vishay's datasheet Section "DEVICES FOR BIDIRECTION APPLICATIONS".
What is the maximum reverse leakage current for SMBJ11CA-E3/52 at its stand-off voltage?
The SMBJ11CA-E3/52 exhibits a maximum reverse leakage current (ID) of 5.0 µA at its 11 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal impact on high-impedance signal paths - such as sensor bias networks or precision reference dividers - and avoids measurable power loss in battery-operated systems. Leakage remains below 10 µA up to +85 °C, supporting reliable operation in extended-temperature industrial environments. All values are verified per the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Rev. 09-Jan-2024), where SMBJ11CA-E3/52 is explicitly listed in the electrical characteristics table.
Can SMBJ11CA-E3/52 be used in place of a unidirectional TVS like SMBJ11A-E3/52?
No - SMBJ11CA-E3/52 and SMBJ11A-E3/52 are not interchangeable without circuit review. The "CA" suffix denotes bidirectional operation (symmetrical clamping), while "A" indicates unidirectional (cathode-marked, forward-conducting only). Substituting SMBJ11CA-E3/52 for SMBJ11A-E3/52 on a DC power rail would allow unintended reverse conduction, potentially causing latch-up or short-circuit failure. Conversely, using SMBJ11A-E3/52 on an AC signal line would fail to suppress negative transients. Always match suffix: CA for bidirectional (e.g., data lines), A for unidirectional (e.g., 12 V supply rails). The SMBJ11CA-E3/52 is purpose-built for balanced transient threats.
SMBJ11CA-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):
- 33A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ11CA-E3/52 FAQ
1.How can I place an order for SMBJ11CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CA-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 SMBJ11CA-E3/52 reliable?
The price and inventory of SMBJ11CA-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 SMBJ11CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CA-E3/52?
SMBJ11CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CA-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 SMBJ11CA-E3/52?
For technical support, including SMBJ11CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ11CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11CA-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 SMBJ11CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11CA-E3/52?
All SMBJ11CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CA-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 SMBJ11CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ11CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11CA-E3/52 Tags
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