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Vishay General Semiconductor - Diodes Division SMBJ11-E3/52
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- Part No.:
- SMBJ11-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11-E3/52.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,796
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Product details
Overview
SMBJ11-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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.
For engineers reviewing the SMBJ11-E3/52 datasheet, SMBJ11-E3/52 pinout, SMBJ11-E3/52 application, or SMBJ11-E3/52 equivalent, this device is selected for robust overvoltage protection on DC power rails, MOSFET gate drivers, and sensor signal lines in industrial control, automotive ECUs, and telecom infrastructure where fast response (<1 ns), low clamping ratio, and AEC-Q101-compliant variants are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging glass-passivated silicon junction technology to achieve sub-nanosecond response time and stable breakdown characteristics across -55 °C to +150 °C junction temperature range. Its low incremental surge resistance ensures minimal voltage overshoot during transient events.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and dissipates 5.0 W under continuous operation at 50 °C ambient on infinite heatsink. Thermal resistance from junction to ambient is 100 °C/W, confirming suitability for surface-mount PCB layouts with standard 0.2" × 0.2" copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 12.2–13.5 V at 1 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 18.2 V at 33 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables downstream IC survival. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients without failure; validated per IEC 61000-4-5 Level 4 requirements. |
| IPPM (Peak Pulse Current) | 33 A - Maximum surge current handled at rated clamping voltage; determines protection level for 10/1000 µs threats. |
| TJmax | +150 °C - Enables reliable operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded. |
| Anode (unbanded end) | Reference node / ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
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-to-ground) in properly designed layouts. |
| 18.2 V clamping voltage at 33 A | Provides >2.5× margin over 7 V logic rails and <1.2× margin over 15 V analog supply rails, minimizing risk of downstream damage. |
| Sub-nanosecond response time | Clamps transients before they propagate beyond local PCB traces, protecting high-speed interfaces and precision analog circuits. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets global environmental regulations without halogen restrictions; suitable for consumer, industrial, and telecom applications. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture sensitivity handling overhead. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver ICs and bootstrap FETs against inductive kickback from BLDC motor phase switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate and source, clamping negative-going spikes below -0.7 V and positive surges above VDD + 18.2 V. Use Value: Prevents gate oxide rupture and latch-up in 600 V half-bridge drivers by limiting transient excursions to within absolute maximum ratings. |
Use Scenario: Input protection for LIN bus transceivers and microcontroller I/O pins exposed to battery dump energy and load-dump pulses. IC Role / Device Role / Timing Role: Standoff-rated clamp on 12 V supply rail and signal lines, activated only during >11 V overvoltage events lasting >100 ns. Use Value: Maintains functional safety integrity during ISO 7637-2 Pulse 5a (load dump) by holding rail voltage ≤18.2 V for up to 400 ms. |
| Telecom Power Supply Inputs | Consumer Sensor Signal Conditioning |
|
Use Scenario: Secondary-side DC input protection for PoE-powered Ethernet switches and base station RF modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V or 57 V DC distribution rails, coordinated with upstream fuses and MOVs. Use Value: Limits fault energy delivered to DC-DC converters during lightning-induced surges, reducing need for oversized input capacitors. |
Use Scenario: ESD and surge protection for analog outputs of MEMS accelerometers and temperature sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) unidirectional clamp on 3.3 V output lines, preserving signal integrity up to 1 MHz. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without signal distortion or offset drift in 16-bit ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A-E3/52 | Same electrical specs and package; identical marking code "KZ" per datasheet Table 1. | No functional difference; "SMBJ11A-E3/52" is the canonical ordering code; "SMBJ11-E3/52" is legacy shorthand used interchangeably by Vishay. | Select SMBJ11A-E3/52 for guaranteed alignment with latest Vishay documentation and distributor inventory systems. |
| 1.5SMC11A | Same VWM (11 V), but higher VC (19.9 V at 30.2 A) and larger SMC (DO-214AB) package (2.5 mm wider). | Lower power density (500 W vs. 600 W); requires larger PCB area and exhibits higher thermal resistance (RθJA = 125 °C/W). | Choose only if existing layout uses SMC footprint or requires higher IFSM (150 A vs. 100 A); otherwise SMBJ11-E3/52 offers superior clamping and space efficiency. |
Compared with SMBJ11A-E3/52, the SMBJ11-E3/52 is functionally identical and interchangeable; compared with 1.5SMC11A, it delivers tighter clamping, higher surge power in smaller area, and lower thermal impedance-making it preferable for space-constrained, high-reliability DC rail protection.
Availability
SMBJ11-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply, RoHS compliance, and MSL Level 1 reflow capability.
Supply support for SMBJ11-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, power efficiency, and automotive qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting design-in across automotive, industrial, and communications systems where robustness and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMBJ11-E3/52 at its rated peak pulse current?
The SMBJ11-E3/52 has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 33 A using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per JEDEC standards and ensures predictable voltage limiting during surge events. The SMBJ11-E3/52 maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ11-E3/52 suitable for automotive applications?
The SMBJ11-E3/52 itself is a commercial-grade part (E3 suffix), not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ11HE3 variant (with HE3 suffix) that is AEC-Q101 qualified and rated for automotive under-hood use. For non-automotive applications such as industrial controls or telecom, the SMBJ11-E3/52 meets all required electrical and thermal specifications. Always verify qualification status via the full ordering code when selecting for automotive designs.
What does the "/52" suffix indicate in SMBJ11-E3/52?
The "/52" suffix in SMBJ11-E3/52 specifies the packaging configuration: 750 units per 7-inch diameter plastic tape-and-reel. This is the standard small-batch and prototyping reel size used by distributors and contract manufacturers. The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads. Together, "E3/52" fully defines the material content, qualification level, and packaging format for procurement and logistics tracking.
How does SMBJ11-E3/52 compare to bidirectional TVS diodes like SMBJ11CA?
The SMBJ11-E3/52 is unidirectional and intended for DC line protection where polarity is fixed, offering lower leakage and sharper knee characteristics than bidirectional types. In contrast, SMBJ11CA provides symmetrical clamping for AC or floating signal lines but exhibits higher reverse leakage and slightly higher VC. Use SMBJ11-E3/52 on 11 V DC rails with grounded return; select SMBJ11CA only when protecting differential pairs or AC-coupled paths where voltage polarity reverses. Both share identical SMB package and 600 W rating.
What is the thermal resistance and power derating behavior of SMBJ11-E3/52?
The SMBJ11-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. Its continuous power dissipation (PD) is rated at 5.0 W at 50 °C ambient, derating linearly to zero at 150 °C junction temperature. Derating curves in Figure 2 of Vishay document 88392 confirm 80% power capability at 70 °C ambient, making SMBJ11-E3/52 suitable for enclosed industrial enclosures without forced airflow.
SMBJ11-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
SMBJ11-E3/52 FAQ
1.How can I place an order for SMBJ11-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11-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 SMBJ11-E3/52 reliable?
The price and inventory of SMBJ11-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 SMBJ11-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11-E3/52?
SMBJ11-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11-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 SMBJ11-E3/52?
For technical support, including SMBJ11-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11-E3/52 requirements.
6.How does Aetrix verify that SMBJ11-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11-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 SMBJ11-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11-E3/52?
All SMBJ11-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11-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 SMBJ11-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ11-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11-E3/52 Tags
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