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Vishay General Semiconductor - Diodes Division SMBJ11A-E3/52
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- Part No.:
- SMBJ11A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11A-E3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,070
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Product details
Overview
SMBJ11A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 33 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ11A-E3/52 datasheet, SMBJ11A-E3/52 pinout, SMBJ11A-E3/52 application, or SMBJ11A-E3/52 equivalent, key selection criteria include its unidirectional polarity, SMB (DO-214AA) package, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds VBR. Its low incremental surge resistance ensures minimal voltage overshoot during 600 W surges, while glass-passivated junction enables stable performance under repetitive transients.
The SMBJ11A-E3/52 exhibits fast response time (<1 ps), meets MSL level 1 per J-STD-020 (260 °C reflow peak), and delivers 100 A IFSM surge capability (8.3 ms half-sine). Its thermal resistance RθJA is 100 °C/W, requiring appropriate PCB copper pad area (0.2" × 0.2") for rated power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR @ IT = 1 mA | 12.2–13.5 V - Breakdown threshold range; ensures reliable triggering above normal operating voltage. |
| VC @ IPPM = 33 A | 18.2 V - Clamped voltage during 600 W transient; limits stress on downstream ICs like microcontrollers or CAN transceivers. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| IFSM | 100 A - Non-repetitive forward surge current rating; withstands inrush or load-dump events in automotive 12 V systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood or industrial high-ambient environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS-compliant, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential rail; defines current path during clamping. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 12 V supply or CAN_H); clamps to anode when overvoltage occurs. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating. |
| 18.2 V clamping voltage at 33 A | Keeps protected ICs (e.g., STM32, TJA1042) within absolute maximum ratings during transients. |
| 1.0 µA max reverse leakage at 11 V | Minimizes standby power loss in battery-powered sensor nodes and always-on automotive modules. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning or floor-life restrictions. |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring reliability validation per stress test standards. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V power input of body control module (BCM) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO or DC-DC regulator. Use Value: Limits voltage to ≤18.2 V during 33 A surge, preventing damage to 24 V-rated regulators and enabling single-stage protection architecture. |
Use Scenario: Shielding analog output (4–20 mA) or digital I²C lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Parallel-connected TVS on signal pair to divert ESD (IEC 61000-4-2) and fast transients (IEC 61000-4-4) to ground. Use Value: Sub-1 ns response and 1.0 µA leakage preserve signal integrity and system quiescent current in precision measurement circuits. |
| Telecom Interface Surge Suppression | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding RS-485 transceiver (e.g., SN65HVD72) on telecom base station backhaul links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable family member (e.g., SMBJ11CA) used across differential pair; SMBJ11A-E3/52 applied for single-ended bias rail protection. Use Value: 600 W rating handles multi-kV induced surges on long cable runs while maintaining <1% signal distortion at 10 Mbps. |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB-C ports in smart speakers and docking stations. IC Role / Device Role / Timing Role: Standoff voltage (11 V) sits safely above 5 V USB spec but below 20 V PD negotiation ceiling; clamps fault conditions to 18.2 V. Use Value: Prevents latch-up or gate oxide rupture in USB controller ICs during hot-plug ESD or adapter fault events. |
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-E3/52 | Bidirectional variant; symmetric VBR (12.2–13.5 V) in both polarities; no polarity marking. | Required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY) where reverse polarity transients occur. | Select SMBJ11CA-E3/52 when protecting bidirectional data lines; SMBJ11A-E3/52 remains optimal for DC power rails with defined ground reference. |
| SMAJ11A-E3/52 | Lower 400 W PPPM; same VWM/VBR/VC but higher clamping impedance; SMA (DO-214AC) package (smaller footprint). | Suitable for space-constrained consumer PCBs with lower surge threat levels (e.g., IEC 61000-4-5 Level 2). | Choose SMAJ11A-E3/52 only if layout area is critical and surge requirements do not exceed 400 W; SMBJ11A-E3/52 provides 50% higher surge margin. |
Compared with SMBJ11CA-E3/52 and SMAJ11A-E3/52, the SMBJ11A-E3/52 offers optimal balance of 600 W surge capacity, standardized SMB footprint, and unidirectional clamping behavior - making it the preferred choice for 12 V automotive and industrial power rail protection where polarity is fixed and surge severity is high.
Availability
SMBJ11A-E3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom infrastructure projects requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ11A-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 SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure tolerance and repeatable clamping are critical.
FAQ
What is the maximum clamping voltage of SMBJ11A-E3/52 at its rated peak pulse current?
The SMBJ11A-E3/52 has a maximum clamping voltage (VC) of 18.2 V at 33 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ11A-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection in demanding environments.
Is SMBJ11A-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
The SMBJ11A-E3/52 itself is the commercial-grade RoHS-compliant variant (E3 suffix). However, Vishay offers AEC-Q101 qualified versions under ordering codes SMBJ11AHE3_X (HE3 suffix), which share identical electrical characteristics and SMB package. For automotive designs requiring formal qualification, specify the HE3 variant - the SMBJ11A-E3/52 serves as the baseline for qualification testing and shares all critical parameters including VWM, VBR, VC, and PPPM.
How does the SMBJ11A-E3/52 differ from bidirectional TVS diodes like SMBJ11CA-E3/52?
The SMBJ11A-E3/52 is unidirectional, meaning it conducts only when cathode voltage exceeds anode by ≥VBR, with polarity marked by a band. In contrast, SMBJ11CA-E3/52 is bidirectional and symmetrical - it clamps in both directions with identical VBR and VC. The SMBJ11A-E3/52 is intended for DC power rails or single-ended signals referenced to ground; using it in AC or floating applications risks failure due to reverse conduction. Always match polarity configuration to circuit topology.
What PCB layout considerations are required to achieve the full 600 W rating of SMBJ11A-E3/52?
To sustain the rated 600 W peak pulse power, the SMBJ11A-E3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet. Smaller pads increase thermal resistance and cause premature thermal runaway during surge events. Additionally, keep traces short and wide between the SMBJ11A-E3/52 and protected node, and avoid vias in high-current paths to minimize inductance that could elevate clamping voltage beyond 18.2 V.
Can SMBJ11A-E3/52 be used to protect 5 V logic lines such as USB or I²C?
No - the SMBJ11A-E3/52 has a 11 V stand-off voltage (VWM) and 12.2–13.5 V breakdown, making it unsuitable for direct protection of 5 V logic lines, where clamping would occur well above safe IC limits. For 5 V interfaces, use lower-voltage TVS devices like SMBJ5.0A-E3/52 (VWM = 5.0 V) or dedicated ESD arrays. The SMBJ11A-E3/52 is correctly applied on 12 V or higher rails, such as automotive battery inputs or industrial 24 V supplies.
SMBJ11A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ11A-E3/52 FAQ
1.How can I place an order for SMBJ11A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11A-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 SMBJ11A-E3/52 reliable?
The price and inventory of SMBJ11A-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 SMBJ11A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11A-E3/52?
SMBJ11A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11A-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 SMBJ11A-E3/52?
For technical support, including SMBJ11A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11A-E3/52 requirements.
6.How does Aetrix verify that SMBJ11A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11A-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 SMBJ11A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11A-E3/52?
All SMBJ11A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11A-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 SMBJ11A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ11A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11A-E3/52 Tags
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