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Vishay General Semiconductor - Diodes Division SMBJ14HE3/52
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- Part No.:
- SMBJ14HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14HE3/52.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,095
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Product details
Overview
SMBJ14HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 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 - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ14HE3/52 datasheet, SMBJ14HE3/52 pinout, SMBJ14HE3/52 application, or SMBJ14HE3/52 equivalent, key selection criteria include clamping performance under 25.9 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 14 V, it avalanches into low-impedance conduction to divert transients away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Designed for repetitive surge handling up to 0.01% duty cycle, SMBJ14HE3/52 delivers 600 W peak pulse power with minimal incremental surge resistance and fast response time (<1.0 ns), meeting UL 497B recognition and J-STD-020 MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - Ensures reliable turn-on margin above VWM |
| VC @ IPPM | 23.2 V at 25.9 A - Clamping voltage limits stress on protected circuitry during surge |
| PPPM | 600 W (10/1000 µs) - Handles high-energy transients from inductive switching or ESD |
| IFSM | 100 A (8.3 ms half-sine) - Supports single-event surge robustness in power supply inputs |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments |
| Package | SMB (DO-214AA) - Low-profile SMT footprint compatible with standard pick-and-place equipment |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-indicated by molded band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (reverse-biased during protection) | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Reverse voltage sensing node | Connected to protected line (e.g., 12 V rail); band marking identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronic control units requiring reliability under thermal cycling and vibration |
| 600 W peak pulse power | Clamps 10/1000 µs surges without degradation across ≥1000 cycles at 0.01% duty |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during transient events, reducing risk to downstream logic |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; supports lead-free reflow up to 260 °C peak |
| Glass-passivated junction | Provides stable VBR tolerance and low leakage (<1.0 µA) over temperature and lifetime |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS clamping reverse surges before they reach LDO regulators or MCU VDD pins. Use Value: Limits clamped voltage to 23.2 V during 25.9 A surge, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. | Use Scenario: Safeguarding analog front-end inputs of pressure or temperature sensors connected to long harnesses in factory automation systems. IC Role / Device Role / Timing Role: Fast-response voltage clamp on sensor signal lines exposed to ESD and inductive coupling from nearby solenoids. Use Value: Sub-1 ns response and 23.2 V clamping prevent ADC saturation and preserve measurement integrity during 4 kV contact ESD events. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Protection |
Use Scenario: Guarding PoE-powered switch port DC inputs against lightning-induced surges on outdoor Ethernet cabling. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of DC-DC converter input to absorb common-mode transients. Use Value: 600 W rating handles IEC 61000-4-5 combination wave surges (10/700 µs) without failure or parameter shift. | Use Scenario: Securing USB-C PD adapter 20 V output rails against overvoltage faults caused by controller miscommunication or cable shorts. IC Role / Device Role / Timing Role: Standoff-limited unidirectional clamp that activates only above 14 V, avoiding false triggering during normal regulation ripple. Use Value: Tight VBR tolerance (±5.7%) ensures consistent activation timing and prevents nuisance tripping during 200 mV peak-to-peak output noise. |
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 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package | Lacks automotive qualification; suitable for industrial/commercial designs without automotive compliance requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SAC14 | Same VWM and VC, but in SOD-123FL package (smaller footprint, lower PPPM = 400 W) | Lower surge capacity limits use to low-energy interfaces (e.g., I²C, UART) rather than power rails | Choose only for space-constrained PCBs where 400 W surge immunity suffices |
Compared with SMBJ14A-E3/52, SMBJ14HE3/52 adds AEC-Q101 qualification for automotive use without altering clamping behavior; versus SAC14, it provides 50% higher surge power handling and larger thermal mass via SMB package - critical for protecting 12 V/24 V power domains.
Availability
SMBJ14HE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power supplies, and consumer USB-C PD adapters requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMBJ14HE3/52 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 validation.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMBJ14HE3/52 and how is it measured?
The SMBJ14HE3/52 has a maximum clamping voltage (VC) of 23.2 V, measured at its rated peak pulse current (IPPM) of 25.9 A using a 10/1000 µs double-exponential surge waveform. This value is guaranteed per Vishay's datasheet (Document Number 88392, Rev. 09-Jan-2024) and reflects worst-case voltage seen by protected circuitry during standardized transient events.
Is SMBJ14HE3/52 RoHS-compliant and halogen-free?
Yes, SMBJ14HE3/52 is RoHS-compliant and halogen-free, indicated by the "HM3" suffix structure in its full ordering code. The HE3 variant denotes AEC-Q101 qualification and RoHS compliance; HM3 adds halogen-free molding compound per IEC 61249-2-21, confirmed in Vishay's material categorization documentation (www.vishay.com/doc?99912).
Does SMBJ14HE3/52 have bidirectional capability?
No, SMBJ14HE3/52 is strictly unidirectional. Its cathode band marking and electrical specifications (e.g., forward voltage VF = 3.5 V max. at 50 A) confirm single-polarity operation. For bidirectional protection, Vishay offers the SMBJ14CA variant - which shares the same package but exhibits symmetrical breakdown in both directions.
What is the thermal resistance of SMBJ14HE3/52 and how does it affect layout?
SMBJ14HE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive ambient temperature rise - especially in enclosed automotive or industrial enclosures.
Can SMBJ14HE3/52 replace SMBJ14A-E3/52 in an existing design?
Yes, SMBJ14HE3/52 is a direct drop-in replacement for SMBJ14A-E3/52 in terms of pinout, package, and all electrical parameters - the only difference is AEC-Q101 qualification. No PCB changes are required; however, system-level validation per automotive qualification requirements (e.g., temperature cycling, ESD, surge testing) must be repeated if upgrading to SMBJ14HE3/52 for automotive deployment.
SMBJ14HE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ14HE3/52 FAQ
1.How can I place an order for SMBJ14HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14HE3/52 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 SMBJ14HE3/52 reliable?
The price and inventory of SMBJ14HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ14HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14HE3/52?
SMBJ14HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14HE3/52 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 SMBJ14HE3/52?
For technical support, including SMBJ14HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14HE3/52 requirements.
6.How does Aetrix verify that SMBJ14HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ14HE3/52 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 SMBJ14HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ14HE3/52?
All SMBJ14HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14HE3/52, 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 SMBJ14HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ14HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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