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Vishay General Semiconductor - Diodes Division SMBJ11A-M3/52
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- Part No.:
- SMBJ11A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11A-M3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,475
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Product details
Overview
SMBJ11A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown range at 1 mA, 18.2 V maximum clamping voltage at 33 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ11A-M3/52 datasheet, SMBJ11A-M3/52 pinout, SMBJ11A-M3/52 application, or SMBJ11A-M3/52 equivalent, key selection criteria include clamping performance under 33 A surge, thermal resistance (RθJA = 100 °C/W), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds VBR (12.2–13.5 V), with fast response time (<1 ps) and low incremental surge resistance to limit transient energy delivered to downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics across temperature.
The device is rated for repetitive 600 W pulses (10/1000 µs, 0.01% duty cycle), derated above 25 °C per Fig. 2, and supports operating junction temperatures from –55 °C to +150 °C. Polarity is marked by cathode band; terminals are matte tin-plated and solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse working voltage before clamping begins |
| VBR @ IT = 1 mA | 12.2–13.5 V - Confirmed breakdown range ensuring reliable turn-on margin above VWM |
| VC @ IPPM = 33 A | 18.2 V - Clamped voltage during 600 W transient, limiting stress on protected ICs |
| PPPM | 600 W - Peak pulse power handling with standard 10/1000 µs waveform |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on recommended 5.0 mm × 5.0 mm copper pads |
| TJ max. | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 0.220" length and 0.155" width |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity marked by cathode band. Dimensions: 5.59 mm × 3.94 mm × 2.44 mm (L × W × H), with 0.086" (2.18 mm) minimum cathode-to-anode distance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient conduction path | Connects to protected line; conducts avalanche current to ground during overvoltage events |
| Anode | Reference return | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V rails |
| 18.2 V clamping at 33 A | Keeps downstream logic ICs (e.g., MCU GPIO, CAN transceivers) below absolute maximum ratings during transients |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements for green electronics manufacturing |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a) |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and inductive switching noise in door module PCBs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed directly at connector entry point before ESD protection and filtering. Use Value: Limits transient voltage to ≤18.2 V during 33 A surges, preventing latch-up or gate oxide damage in 5 V/3.3 V logic devices. | Use Scenario: Safeguarding analog output lines (4–20 mA) and digital communication (RS-485) in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side signal traces, coordinated with series impedance and secondary TVS staging. Use Value: Maintains signal integrity under repetitive 600 W surges while meeting IEC 61000-4-4 EFT immunity requirements. |
| Consumer Power Adapter Input | Telecom DC Power Distribution |
Use Scenario: Secondary-side DC input protection for USB-C PD adapters subject to hot-plug and capacitive discharge transients. IC Role / Device Role / Timing Role: Standoff-rated (11 V) clamp on 12 V auxiliary rail feeding buck controllers and optocouplers. Use Value: Prevents overvoltage failure of 15 V-rated MOSFET drivers and feedback resistors during plug-in surges. | Use Scenario: Overvoltage suppression on -48 V telecom distribution boards exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS placed at PSE port entry, referenced to chassis ground with low-inductance layout. Use Value: Clamps induced transients to ≤18.2 V within 1 ns, preserving integrity of PoE controller ICs and isolation barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3) | Acceptable where halogen-free requirement is not mandated (e.g., non-automotive commercial designs) | Select E3 for cost-sensitive, non-automotive applications with standard RoHS compliance |
| SMBJ12A-M3/52 | Higher VWM (12 V), VBR min 13.3 V, VC 19.9 V at 30.2 A | Better suited for 12 V nominal systems with tighter margin between VWM and operating voltage | Choose SMBJ12A-M3/52 when protecting 12 V rails with >1 V headroom needed above nominal voltage |
Compared with SMBJ11A-M3/52, SMBJ11A-E3/52 offers identical clamping and surge capability but lacks halogen-free certification, while SMBJ12A-M3/52 trades 1 V higher standoff for reduced peak current handling (30.2 A vs 33 A) and slightly higher clamping - critical for 12 V systems requiring tighter VWM margin.
Availability
SMBJ11A-M3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and telecom power distribution requiring stable component supply with halogen-free compliance and AEC-Q101-qualified variants available upon request.
Supply support for SMBJ11A-M3/52 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, TVS devices, and MOSFETs for high-reliability power and protection applications.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where repeatable clamping, thermal stability, and automated assembly compatibility are essential.
FAQ
What is the maximum clamping voltage of SMBJ11A-M3/52 at its rated peak pulse current?
The SMBJ11A-M3/52 has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM) of 33 A, measured using the standardized 10/1000 µs waveform. This value ensures protected circuits remain within safe operating limits during surge events. The SMBJ11A-M3/52 achieves this clamping performance while maintaining low incremental surge resistance and fast response time.
Does SMBJ11A-M3/52 meet automotive qualification standards?
The SMBJ11A-M3/52 itself is a commercial-grade halogen-free part (M3 suffix); however, the SMBJ11A-HM3 variant is AEC-Q101 qualified for automotive applications. For designs requiring automotive qualification, specify SMBJ11A-HM3_X (where X denotes revision code). The SMBJ11A-M3/52 shares identical electrical and thermal characteristics but lacks formal AEC-Q101 certification.
What does the "M3" suffix indicate in SMBJ11A-M3/52?
The "M3" suffix in SMBJ11A-M3/52 denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, with matte tin-plated leads qualified per JESD 201 Class 2 whisker testing. It distinguishes the part from E3 (RoHS only) and HM3 (AEC-Q101 + halogen-free) variants. The SMBJ11A-M3/52 is optimized for green manufacturing in industrial and consumer applications.
Can SMBJ11A-M3/52 be used for bidirectional transient protection?
No - SMBJ11A-M3/52 is strictly unidirectional. Bidirectional operation requires the CA-suffixed variant (e.g., SMBJ11CA). Using SMBJ11A-M3/52 on AC-coupled or symmetrical signal lines risks forward conduction during negative half-cycles. For bidirectional protection, select SMBJ11CA-M3/52, which provides matched clamping in both directions with same VWM and VC ratings.
What is the thermal resistance and recommended pad layout for SMBJ11A-M3/52?
The SMBJ11A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This pad size is required to achieve rated power dissipation and avoid thermal derating. Smaller pads increase RθJA, reducing safe operating area during repetitive surges.
SMBJ11A-M3/52 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-M3/52 FAQ
1.How can I place an order for SMBJ11A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11A-M3/52 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-M3/52 reliable?
The price and inventory of SMBJ11A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11A-M3/52?
SMBJ11A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11A-M3/52 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-M3/52?
For technical support, including SMBJ11A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11A-M3/52 requirements.
6.How does Aetrix verify that SMBJ11A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11A-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11A-M3/52?
All SMBJ11A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11A-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ11A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11A-M3/52 Tags
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