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Vishay General Semiconductor - Diodes Division SMBJ14HE3/5B
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- Part No.:
- SMBJ14HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14HE3/5B.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,442
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Product details
Overview
SMBJ14HE3/5B 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 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SMBJ14HE3/5B datasheet, SMBJ14HE3/5B pinout, SMBJ14HE3/5B application, or SMBJ14HE3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and AEC-Q101 qualification status - all critical for ESD/surge protection design validation and automotive-grade component selection.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, with breakdown voltage (VBR) specified at 15.6–17.2 V (IT = 1 mA), enabling precise overvoltage threshold control. Its low incremental surge resistance ensures stable clamping during fast transients, and its 100 °C/W junction-to-ambient thermal resistance requires careful PCB pad layout per JEDEC standards.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), uses glass-passivated junction technology for reliability, and exhibits 0.087 %/°C temperature coefficient of VBR. Polarity is marked by cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse operating voltage before conduction begins; sets system operating margin. |
| VC @ IPPM | 23.2 V at 25.9 A - Clamped voltage during 10/1000 µs surge; defines protected circuit's worst-case overvoltage exposure. |
| PPPM | 600 W - Peak transient power handling capability; determines survivability against lightning or inductive switch-off surges. |
| IPPM | 25.9 A - Peak surge current supported at rated clamping voltage; used to size upstream fusing and trace routing. |
| TJ max. | +150 °C - Maximum junction temperature; constrains thermal design and ambient operating range in enclosed systems. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; mandates minimum 5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
| AEC-Q101 Qualified | Yes - Validated for automotive applications including engine control units and body electronics requiring high-reliability surge suppression. |
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 band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to lower-potential side of protected line. | Used only in forward-biased fault conditions; not active during normal reverse-biased TVS operation. |
| Cathode | Current exit point during reverse avalanche clamping; connected to higher-potential side (e.g., VCC or signal line). | Defines polarity-sensitive placement; must align with system ground reference to ensure proper clamping path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events without degradation. |
| AEC-Q101 qualification | Validates reliability for automotive under-hood and infotainment applications where temperature cycling and long-term stability are critical. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection fidelity for sensitive logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; supports high-yield automated assembly in commercial and automotive production lines. |
| Glass passivated junction | Provides stable leakage performance and long-term parameter consistency across humidity and thermal stress conditions. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VBAT and chassis ground to limit voltage excursions to ≤23.2 V. Use Value: Prevents damage to downstream DC-DC converters and microcontrollers during ISO 7637-2 Pulse 5a (75 V/300 ms) events. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across differential signal pair (e.g., 4–20 mA loop) to suppress EFT bursts. Use Value: Maintains signal integrity below 100 pF junction capacitance while clamping ±1 kV ESD per IEC 61000-4-2. |
| Consumer Power Adapter Input Stage | MOSFET Gate Driver Surge Suppression |
|
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V/9 V/15 V output rails to absorb coupling transients from primary-side switching noise. Use Value: Limits output rail overshoot to <25 V during 10/1000 µs surges, preventing latch-up in connected Type-C controller ICs. |
Use Scenario: Gate-source protection of high-side N-channel MOSFETs in motor drive half-bridges. IC Role / Device Role / Timing Role: Unidirectional clamp from gate to source, referenced to driver IC ground, absorbing Miller-induced spikes. Use Value: Prevents gate oxide rupture by clamping transient spikes to ≤23.2 V while adding <0.5 nH parasitic inductance. |
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-E3/5B | No AEC-Q101 qualification; commercial-grade only; identical VWM, VC, and PPPM. | Suitable for non-automotive industrial or consumer use where automotive reliability certification is not required. | Select when cost sensitivity outweighs automotive qualification needs and thermal/environmental stress profiles are milder. |
| SMAJ14AHE3/A | Lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W); same VWM/VC specs. | Used where board space is constrained but surge energy is limited to IEC 61000-4-5 Level 3 (0.5 kV line-earth). | Choose for compact designs accepting reduced surge margin and requiring tighter thermal management via enhanced copper pour. |
Compared with SMBJ14A-E3/5B, SMBJ14HE3/5B adds AEC-Q101 qualification for automotive deployment, while SMAJ14AHE3/A trades 33 % lower peak power and higher thermal resistance for 30 % smaller footprint - guiding selection based on reliability tier, surge severity, and layout constraints.
Availability
SMBJ14HE3/5B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and consumer power adapter surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMBJ14HE3/5B 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where consistent clamping performance and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMBJ14HE3/5B at its rated peak pulse current?
The SMBJ14HE3/5B has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current (IPPM) of 25.9 A, measured under the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed per Vishay's datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuits during transient events. The SMBJ14HE3/5B maintains this clamping performance across its full operating temperature range when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Is SMBJ14HE3/5B suitable for automotive applications?
Yes, SMBJ14HE3/5B is AEC-Q101 qualified, making it suitable for automotive applications including engine control modules, body control units, and ADAS sensor interfaces. Its qualification covers temperature cycling, humidity testing, and mechanical shock per AEC-Q101 requirements. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction, distinguishing it from commercial-grade variants like SMBJ14A-E3/5B. Engineers deploying SMBJ14HE3/5B in automotive systems benefit from validated long-term reliability under thermal and vibration stress.
What is the standoff voltage (VWM) and why does it matter for SMBJ14HE3/5B?
The standoff voltage (VWM) of SMBJ14HE3/5B is 14 V - the maximum continuous reverse voltage the device can block without entering avalanche conduction. This parameter ensures the SMBJ14HE3/5B remains non-conductive during normal operation, minimizing leakage and avoiding unnecessary power loss or false triggering. It must be selected ≥10–20 % above the system's maximum steady-state voltage (e.g., 12 V nominal bus) to accommodate ripple and tolerance while preserving margin before clamping activation.
How does the SMB (DO-214AA) package of SMBJ14HE3/5B affect thermal performance?
The SMB (DO-214AA) package of SMBJ14HE3/5B 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. This value assumes minimal PCB copper; reducing pad area increases thermal resistance and risks exceeding the +150 °C maximum junction temperature during repetitive surges. For sustained operation near rated power, designers must verify thermal relief using Vishay's Fig. 2 derating curves and ensure adequate airflow or adjacent thermal vias - especially critical in sealed automotive enclosures where SMBJ14HE3/5B operates.
What is the difference between SMBJ14HE3/5B and SMBJ14AHE3/5B?
SMBJ14HE3/5B and SMBJ14AHE3/5B are identical in electrical specifications (VWM = 14 V, VC = 23.2 V, PPPM = 600 W) and packaging (SMB, DO-214AA), but differ in qualification: SMBJ14HE3/5B carries full AEC-Q101 qualification, whereas SMBJ14AHE3/5B is not AEC-Q101 certified. The "HE3" suffix denotes AEC-Q101 compliance per Vishay's ordering nomenclature; "AHE3" is not a defined variant in the official datasheet. Therefore, SMBJ14HE3/5B is the correct and only AEC-Q101-qualified version of this 14 V TVS diode.
SMBJ14HE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ14HE3/5B FAQ
1.How can I place an order for SMBJ14HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14HE3/5B 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 SMBJ14HE3/5B reliable?
The price and inventory of SMBJ14HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ14HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14HE3/5B?
SMBJ14HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14HE3/5B 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 SMBJ14HE3/5B?
For technical support, including SMBJ14HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14HE3/5B requirements.
6.How does Aetrix verify that SMBJ14HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ14HE3/5B 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 SMBJ14HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ14HE3/5B?
All SMBJ14HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14HE3/5B, 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 SMBJ14HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ14HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14HE3/5B Tags
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