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Vishay General Semiconductor - Diodes Division SMBJ14-E3/52
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- Part No.:
- SMBJ14-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14-E3/52.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,554
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Product details
Overview
SMBJ14-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 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on ICs, MOSFETs, and sensor signal lines in industrial and telecom systems.
For engineers reviewing the SMBJ14-E3/52 datasheet, SMBJ14-E3/52 pinout, SMBJ14-E3/52 application, or SMBJ14-E3/52 equivalent, this page delivers verified electrical parameters, thermal behavior, clamping performance under surge conditions, polarity marking convention, and AEC-Q101 qualification status for automotive-grade variants - all critical for ESD/surge protection circuit design and layout validation.
Technical Context
The SMBJ14-E3/52 operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<1 ps) to transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling consistent clamping at 23.2 V when subjected to 25.9 A IPPM (10/1000 µs).
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse operating voltage before conduction begins; sets threshold for normal circuit operation. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 23.2 V at 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; defines protection margin. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability without failure; validated per Fig. 1 derating curve. |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current handled at rated VC; determines PCB trace and fuse sizing. |
| TJ max. | +150 °C - Maximum junction temperature; constrains thermal design and ambient operating limits. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking on one end. Dimensions: 5.59 mm × 4.06 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Protection node | Connected to protected line (e.g., I/O, power rail); conducts avalanche current when VIN exceeds VWM. |
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) without degradation. |
| 23.2 V clamping at 25.9 A | Provides tight voltage limiting for 12 V nominal systems, preserving downstream logic and analog ICs. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 µA at VWM), critical for low-power sensor interfaces. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free assembly processes without preconditioning or special handling. |
| AEC-Q101 qualified option available | HE3/HM3 suffix variants meet automotive reliability requirements for engine control, ADAS, and infotainment modules. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting gate drivers and microcontroller I/O pins from inductive kickback during relay or solenoid switching in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source, clamping negative transients below -0.7 V while holding 14 V stand-off during normal operation. Use Value: Prevents latch-up and oxide damage in 3.3 V/5 V logic interfaces, extending system uptime and reducing field returns. |
Use Scenario: Shielding LIN bus transceivers and door module sensors from battery dump and load-dump transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Standoff-connected TVS on LIN data line, conducting only during >14 V spikes to limit voltage to ≤23.2 V for <100 ns. Use Value: Maintains signal integrity across 19.2 kbps LIN communication without added latency or distortion. |
| Telecom Power Supply Inputs | Consumer Sensor Signal Conditioning |
|
Use Scenario: Safeguarding AC-DC adapter secondary-side outputs against lightning-induced surges entering via Ethernet or PoE lines. IC Role / Device Role / Timing Role: Primary-side TVS on 12 V output rail, absorbing 600 W pulses to prevent overvoltage shutdown of DC-DC controllers. Use Value: Eliminates need for redundant crowbar circuits, reducing BOM count and board area by 35%. |
Use Scenario: Guarding analog front-end inputs of MEMS accelerometers and temperature sensors in smart home hubs against ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF at 0 V) placed directly at connector, shunting >8 kV HBM ESD pulses away from ADC input. Use Value: Preserves signal-to-noise ratio (SNR > 90 dB) while meeting IEC 61000-4-2 Level 4 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A-E3/52 | Same electrical specs and package; identical marking code "BK" and VBR range (15.6–17.2 V); differs only in ordering suffix convention (no hyphen vs. hyphenated). | No functional difference; both intended for commercial-grade 12 V system protection. | Select SMBJ14A-E3/52 if sourcing from legacy BOMs or distributors listing that exact nomenclature. |
| SMCJ14A-E3/52 | Same VWM/VC but in larger SMC (DO-214AB) package; higher IPPM (43.4 A) and PPPM (1500 W); RθJA = 50 °C/W. | Better suited for high-energy surges (e.g., outdoor telecom cabinets), but requires 30% larger PCB area. | Choose SMCJ14A-E3/52 only when surge threat level exceeds 600 W or thermal budget allows larger footprint. |
Compared with SMBJ14-E3/52, SMBJ14A-E3/52 offers identical protection performance in the same SMB footprint, while SMCJ14A-E3/52 trades compactness for higher surge capacity - making SMBJ14-E3/52 optimal for space-constrained 12 V industrial and automotive modules where 600 W clamping suffices.
Availability
SMBJ14-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supply inputs, and consumer sensor signal conditioning requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMBJ14-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 engineered for high-speed transient suppression in space-constrained surface-mount designs, targeting automotive, industrial, and communications equipment where robustness and repeatability under surge stress are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ14-E3/52 under standard test conditions?
The SMBJ14-E3/52 has a maximum clamping voltage (VC) of 23.2 V when subjected to a 10/1000 µs waveform at 25.9 A peak pulse current. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 12 V system tolerances.
Is SMBJ14-E3/52 suitable for automotive applications?
SMBJ14-E3/52 itself is a commercial-grade RoHS-compliant part (E3 suffix). However, the functionally identical SMBJ14HE3 variant is AEC-Q101 qualified and approved for automotive use. For body control modules or infotainment systems requiring qualification, specify SMBJ14HE3 instead of SMBJ14-E3/52 - both share identical electrical specs and SMB package.
How does the polarity marking work on SMBJ14-E3/52?
SMBJ14-E3/52 is unidirectional and marked with a cathode band at one end of the SMB package. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail or signal trace), while the opposite (anode) end connects to ground. This orientation ensures proper reverse-bias operation and clamping action during positive transients.
What is the thermal resistance of SMBJ14-E3/52, and how does it affect layout?
The SMBJ14-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. To maintain TJ ≤ 150 °C under 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - undersized pads may cause premature thermal runaway during repetitive surges.
Can SMBJ14-E3/52 be used in bidirectional configurations?
No - SMBJ14-E3/52 is strictly unidirectional. For bidirectional protection, Vishay specifies the SMBJ14CA variant (e.g., SMBJ14CA-E3/52), which uses a center-tapped die structure and carries no polarity marking. Using SMBJ14-E3/52 in bidirectional roles risks forward conduction and failure during negative transients.
SMBJ14-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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- 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)
SMBJ14-E3/52 FAQ
1.How can I place an order for SMBJ14-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14-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 SMBJ14-E3/52 reliable?
The price and inventory of SMBJ14-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 SMBJ14-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ14-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14-E3/52?
SMBJ14-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14-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 SMBJ14-E3/52?
For technical support, including SMBJ14-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14-E3/52 requirements.
6.How does Aetrix verify that SMBJ14-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ14-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 SMBJ14-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ14-E3/52?
All SMBJ14-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14-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 SMBJ14-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ14-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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