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Vishay General Semiconductor - Diodes Division SMBJ14A-E3/52
- Part No.:
- SMBJ14A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14A-E3/52.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
SMBJ14A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ14A-E3/52 datasheet, SMBJ14A-E3/52 pinout, SMBJ14A-E3/52 application, or SMBJ14A-E3/52 equivalent, key selection criteria include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 15.6–17.2 V breakdown range at 1 mA test current, and AEC-Q101 qualification availability in HE3 variants - critical for automotive-grade surge protection design.
Technical Context
This TVS diode operates as a voltage-clamping device that enters avalanche conduction when transient voltage exceeds its breakdown threshold (VBR = 15.6–17.2 V). Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while the glass-passivated junction delivers stable performance under repetitive surge stress.
Designed for surface-mount assembly on PCBs with 0.2" × 0.2" copper pads per terminal, it meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak. The cathode band identifies polarity, and its unidirectional behavior enables integration into DC-biased circuits without reverse conduction concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR @ IT = 1 mA | 15.6–17.2 V - Breakdown voltage range where avalanche conduction initiates; ensures predictable turn-on timing. |
| VC @ IPPM = 25.9 A | 23.2 V - Clamped voltage during 600 W transient; limits downstream component stress to safe levels. |
| IPPM | 25.9 A - Peak pulse current capability with 10/1000 µs waveform; determines survivability against common ESD/lightning surges. |
| ID @ VWM | 1.0 µA max - Reverse leakage at stand-off voltage; ensures negligible standby power loss in high-impedance circuits. |
| PPPM | 600 W - Peak pulse power handling with 0.01% duty cycle; supports robust protection in infrequent but high-energy events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in hot industrial environments without derating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to lower-potential side of protected line. | Enables standard DC biasing; not active during normal reverse-biased TVS operation. |
| Cathode | Current exit point during avalanche clamping; marked by band; connected to higher-potential side (e.g., VCC or signal line). | Defines unidirectional clamping direction - suppresses positive transients toward ground or negative transients toward supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without failure - suitable for automotive load-dump and inductive switching events. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs - e.g., keeps 3.3 V or 5 V logic inputs within safe absolute maximum ratings during surge. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT processes without moisture-related popcorning or delamination risk. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity stress - critical for industrial field reliability. |
| RoHS-compliant, halogen-free option (E3/M3) | Meets global environmental compliance requirements including JEDEC JESD201 Class 2 whisker resistance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V power rails in body control modules against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive voltage spikes above 14 V to ≤23.2 V, shielding downstream DC-DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage in automotive electronics exposed to 100 V/50 ms transients - validated for AEC-Q101 when specified as HE3 variant. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Placed across signal and return path to clamp fast-rising transients (<1 ns rise time) before they reach precision ADC front-ends. Use Value: Maintains signal integrity with <1.0 µA leakage at 14 V, avoiding offset errors in µA-level current-loop measurements. |
| Telecom Data Line Surge Suppression | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links from lightning-induced surges on long outdoor cabling. IC Role / Device Role / Timing Role: Paired with series impedance to limit current and clamp induced voltages to levels compatible with ±12 V transceiver I/O rails. Use Value: Delivers 25.9 A surge current handling with 23.2 V clamping - reduces need for multi-stage protection and simplifies board layout. |
Use Scenario: Adding secondary overvoltage protection on VBUS lines of USB-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Acts as last-line defense after primary polymeric PTC and ESD diodes, absorbing residual energy from contact discharge events. Use Value: Low-profile SMB package fits tight space constraints near connectors; RoHS-compliant E3 suffix meets consumer product regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA-E3/52 | Bidirectional version with same VWM (14 V), symmetric clamping in both polarities; VC = 23.2 V at ±25.9 A. | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio differential pairs) where polarity reversal occurs. | Select SMBJ14CA-E3/52 only when bidirectional clamping is mandated by circuit topology - not a drop-in replacement for unidirectional use cases. |
| SMAJ14A-E3/52 | Lower 400 W peak pulse power (vs. 600 W); same VWM and VBR range but reduced IPPM (17.4 A) and higher VC (25.7 V). | Suitable for less severe surge environments (e.g., IEC 61000-4-2 contact discharge only), not recommended for ISO 7637-2 or lightning-prone installations. | Choose SMAJ14A-E3/52 only if system-level testing confirms 400 W rating suffices - verify clamping voltage margin with downstream component tolerances. |
Compared with SMBJ14A-E3/52, SMBJ14CA-E3/52 adds bidirectional capability at identical power rating but requires layout verification for symmetric placement, while SMAJ14A-E3/52 trades 33 % lower surge capacity for smaller SMA package - impacting thermal dissipation and long-duration transient resilience.
Availability
SMBJ14A-E3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom data line surge suppression requiring stable component supply across production lifecycles.
Supply support for SMBJ14A-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-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against inductive switching, ESD, and lightning surges is mission-critical.
FAQ
What is the maximum clamping voltage of SMBJ14A-E3/52 under rated surge conditions?
The SMBJ14A-E3/52 exhibits a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 25.9 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 23.2 V during transient events - critical for safeguarding 24 V-rated ICs and MOSFETs. The SMBJ14A-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ14A-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
The SMBJ14A-E3/52 itself is RoHS-compliant commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes SMBJ14AHE3_X (e.g., HE3_B/H) with identical electrical specs and enhanced reliability testing. For automotive designs, specify the HE3 or HM3 suffix - the SMBJ14A-E3/52 must not be substituted without validation, as qualification includes extended temperature cycling, humidity testing, and surge lifetime verification beyond commercial-grade requirements.
How does the SMBJ14A-E3/52 differ from the SMAJ14A-E3/52 in practical circuit protection?
The SMBJ14A-E3/52 delivers 600 W peak pulse power versus 400 W for the SMAJ14A-E3/52, enabling higher surge current handling (25.9 A vs. 17.4 A) and lower clamping voltage (23.2 V vs. 25.7 V) under identical test conditions. In practice, this means the SMBJ14A-E3/52 sustains longer-duration transients and provides tighter voltage limiting - essential for ISO 7637-2 load dump protection where the SMAJ14A-E3/52 may fail or allow damaging overvoltage. The SMBJ14A-E3/52 also uses the larger SMB package, improving thermal dissipation.
What is the reverse leakage current specification for SMBJ14A-E3/52 at its stand-off voltage?
At its 14 V stand-off voltage (VWM), the SMBJ14A-E3/52 specifies a maximum reverse leakage current (ID) of 1.0 µA at 25 °C ambient temperature. This ultra-low leakage ensures minimal power loss and avoids interference in high-impedance sensing circuits - such as those found in precision current-loop transmitters or battery-monitoring systems. Leakage remains below 5 µA up to +125 °C, maintaining accuracy across industrial operating ranges. The SMBJ14A-E3/52 achieves this via glass-passivated junction technology.
Can SMBJ14A-E3/52 be used in bidirectional signal line protection?
No - SMBJ14A-E3/52 is strictly unidirectional and will conduct only when the cathode is at higher potential than the anode. For bidirectional signal lines (e.g., RS-485, CAN, audio), the bidirectional variant SMBJ14CA-E3/52 must be used instead. Attempting to use SMBJ14A-E3/52 on AC or floating signals risks forward conduction during negative half-cycles, leading to malfunction or damage. The SMBJ14A-E3/52's cathode band marking clearly indicates its polarity-sensitive operation.
SMBJ14A-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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.9A
- 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)
SMBJ14A-E3/52 FAQ
1.How can I place an order for SMBJ14A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14A-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 SMBJ14A-E3/52 reliable?
The price and inventory of SMBJ14A-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 SMBJ14A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ14A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14A-E3/52?
SMBJ14A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14A-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 SMBJ14A-E3/52?
For technical support, including SMBJ14A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14A-E3/52 requirements.
6.How does Aetrix verify that SMBJ14A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ14A-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 SMBJ14A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ14A-E3/52?
All SMBJ14A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14A-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 SMBJ14A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ14A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14A-E3/52 Tags
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