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Vishay General Semiconductor - Diodes Division SMAJ14-E3/61
- Part No.:
- SMAJ14-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14-E3/61.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,417
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Product details
Overview
SMAJ14-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 14 V stand-off voltage (VWM), 25.8 V maximum clamping voltage (VC) at 15.5 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ14-E3/61 datasheet, SMAJ14-E3/61 pinout, SMAJ14-E3/61 application, or SMAJ14-E3/61 equivalent, key selection criteria include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C junction temperature rating, RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity per J-STD-020.
Technical Context
This TVS diode operates as a clamping device that enters avalanche breakdown when transient voltage exceeds its breakdown threshold of 15.6–19.1 V (VBR at 1.0 mA test current). Its low incremental surge resistance ensures rapid energy diversion during ESD or lightning-induced surges.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, requiring minimum 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal for rated 400 W pulse handling. The device is rated for -55 °C to +150 °C operating junction temperature and meets JESD201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse working voltage before clamping begins |
| VC @ IPPM | 25.8 V - Clamped voltage across device at 15.5 A peak pulse current (10/1000 µs) |
| IPPM | 15.5 A - Peak surge current capability under standard 10/1000 µs waveform |
| PPPM | 400 W - Peak pulse power dissipation; derates above 78 V to 300 W |
| IR @ VWM | 1.0 µA - Reverse leakage current at stand-off voltage, ensuring minimal standby power loss |
| TJ Range | -55 °C to +150 °C - Operating junction temperature range supporting automotive and industrial environments |
| Package | DO-214AC (SMA) - Surface-mount package with cathode band marking, compatible with automated placement |
Pinout & Package
DO-214AC (SMA) package: two-terminal unidirectional device with cathode indicated by a band on the body. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102, rated for solder dip at 260 °C for 40 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; conducts during forward surge (e.g., 8.3 ms half-sine) |
| Cathode (banded end) | High-side connection point | Connected to protected line; blocks reverse current up to VWM, avalanches above VBR to clamp transients |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating below 78 V |
| Glass passivated chip junction | Ensures stable electrical characteristics and long-term reliability under thermal cycling and humidity stress |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking |
| RoHS-compliant & WEEE compliant | Meets EU environmental directives; matte tin plating eliminates lead and mitigates whisker growth (JESD201 Class 1A) |
| Low clamping ratio (VC/VBR ≈ 1.65) | Minimizes overvoltage stress on downstream components during transient events |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going spikes above 14 V. Use Value: Limits voltage excursion to ≤25.8 V during 15.5 A surge, safeguarding 3.3 V/5 V logic and CAN transceivers. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD (IEC 61000-4-2) and inductive switching noise. Use Value: 1.0 µA leakage preserves signal integrity in high-impedance 4–20 mA loops; fast response prevents latch-up in ADC front-ends. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for USB-C PD and laptop chargers. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V/+20 V output rails to suppress flyback transformer ringing and capacitor discharge spikes. Use Value: 400 W rating handles repetitive 10/1000 µs surges from poor regulation; DO-214AC footprint supports compact layout. |
Use Scenario: Protecting PoE (Power over Ethernet) powered devices from cable-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Unidirectional clamping device on 48 V DC input, coordinated with upstream PoE controller fault detection. Use Value: 150 °C TJ rating ensures operation in sealed enclosures; low thermal resistance (RθJL = 30 °C/W) sustains pulse duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/61 | Lower VBR range (15.6–17.2 V), tighter tolerance; 23.2 V clamping at 17.2 A | Better suited for designs requiring lower turn-on threshold and higher surge current margin | Select SMAJ14A-E3/61 if system tolerances demand tighter VBR control and reduced clamping voltage under higher IPPM |
| SMBJ14-E3/52 | Same VWM/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM | Higher power handling and thermal mass, but requires larger PCB area | Choose SMBJ14-E3/52 only when 400 W is insufficient and board space allows DO-214AA footprint |
Compared with SMAJ14-E3/61, SMAJ14A-E3/61 offers improved VBR consistency and lower clamping at higher current, while SMBJ14-E3/52 trades miniaturization for greater surge endurance - making SMAJ14-E3/61 optimal for space-constrained 400 W-class protection.
Availability
SMAJ14-E3/61 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and consumer power adapter production requiring stable component supply and full traceability.
Supply support for SMAJ14-E3/61 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, efficiency, and compliance.
The SMAJ series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability are critical.
FAQ
What is the breakdown voltage range for SMAJ14-E3/61?
The SMAJ14-E3/61 has a specified breakdown voltage (VBR) range of 15.6 V to 19.1 V at 1.0 mA test current, measured per ANSI/IEEE C62.35 standards. This range reflects manufacturing tolerance and ensures reliable avalanche initiation above the 14 V stand-off voltage while maintaining safe margin below system overvoltage limits. The exact VBR for a given SMAJ14-E3/61 unit falls within this window and is verified during production testing.
Is SMAJ14-E3/61 unidirectional or bidirectional?
SMAJ14-E3/61 is a unidirectional Transient Voltage Suppressor, indicated by the absence of "C" or "CA" suffix and confirmed by its single cathode band marking. It blocks reverse current up to 14 V and clamps positive transients on the cathode side - unlike bidirectional variants (e.g., SMAJ14CA) which protect both polarities symmetrically. This makes SMAJ14-E3/61 appropriate for DC power rail protection where polarity is fixed.
What is the maximum clamping voltage of SMAJ14-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ14-E3/61 is 25.8 V at 15.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per datasheet specifications and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. It directly determines the protective margin for 3.3 V, 5 V, or 12 V ICs connected to the same rail.
Does SMAJ14-E3/61 meet automotive qualification standards?
SMAJ14-E3/61 is commercial-grade (E3 suffix) and not AEC-Q101 qualified; for automotive applications requiring qualification, the HE3-suffix variant (e.g., SMAJ14HE3/61) must be selected. The HE3 version undergoes additional stress testing per AEC-Q101 and carries high-reliability certification - whereas SMAJ14-E3/61 is rated for industrial and consumer use with full RoHS, WEEE, and MSL Level 1 compliance.
What is the thermal resistance specification for SMAJ14-E3/61?
SMAJ14-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on the recommended 0.2 × 0.2" (5.0 × 5.0 mm) copper pad layout. These values define the device's ability to dissipate surge energy thermally and must be respected in PCB layout to maintain the 400 W peak pulse rating and avoid junction overheating during repetitive transients.
SMAJ14-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 15.5A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ14-E3/61 FAQ
1.How can I place an order for SMAJ14-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14-E3/61 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 SMAJ14-E3/61 reliable?
The price and inventory of SMAJ14-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ14-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14-E3/61?
SMAJ14-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14-E3/61 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 SMAJ14-E3/61?
For technical support, including SMAJ14-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14-E3/61 requirements.
6.How does Aetrix verify that SMAJ14-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ14-E3/61 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 SMAJ14-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ14-E3/61?
All SMAJ14-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14-E3/61, 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 SMAJ14-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ14-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14-E3/61 Tags
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