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Vishay General Semiconductor - Diodes Division SMAJ14AHE3/61
- Part No.:
- SMAJ14AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14AHE3/61.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,352
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Product details
Overview
SMAJ14AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection on power rails and signal lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V clamping voltage (VC) at 17.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power input stages.
For engineers reviewing the SMAJ14AHE3/61 datasheet, SMAJ14AHE3/61 pinout, SMAJ14AHE3/61 application, or SMAJ14AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and clamping performance under 17.2 A surge conditions in automotive-grade designs.
Technical Context
This TVS diode operates as a shunt-clamping device: under normal bias it presents high impedance (<1 μA leakage at 14 V), then rapidly transitions to low-impedance conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤23.2 V. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns).
Thermal design relies on RθJA = 120 °C/W (on standard 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per stress test requirements for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - guaranteed breakdown window defining turn-on threshold tolerance |
| VC @ IPPM | 23.2 V at 17.2 A - clamped voltage during 400 W 10/1000 μs surge, directly limiting IC stress |
| IPPM | 17.2 A - peak surge current capability under standardized waveform, validated for repetitive 0.01% duty cycle |
| PPPM | 400 W - transient energy absorption capacity, derated above 78 V (300 W at higher voltages) |
| TJ max. | +150 °C - maximum junction temperature supporting under-hood automotive placement without derating |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" length, compatible with automated SMT assembly |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lower-potential rail; completes conduction path during transient clamp |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V supply or CAN_H); carries full surge current into ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a transients and IEC 61000-4-5 surge events on 12 V systems |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage margin between clamp and protected IC's absolute maximum rating |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: 12 V battery feed to MCU power supply in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND to clamp transients before LDO input. Use Value: Limits voltage to ≤23.2 V during 17.2 A surges, protecting downstream 28 V-rated regulators and microcontrollers. |
Use Scenario: Analog output line (0–5 V) from pressure sensor in factory automation PLC module. IC Role / Device Role / Timing Role: TVS connected across signal and ground to suppress ESD and inductive kickback from nearby solenoid switching. Use Value: Sub-1 ns response prevents >23.2 V excursion from damaging 5 V ADC inputs or op-amp buffers. |
| DC-DC Converter Input Stage | Telecom Equipment Power Rail |
|
Use Scenario: 24 V input to isolated flyback converter in industrial IoT gateway subjected to long-line surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input filter and controller IC. Use Value: Absorbs 400 W pulses without degradation, maintaining system uptime during field-deployed surge events. |
Use Scenario: -48 V telecom power distribution board where lightning-induced surges threaten line cards. IC Role / Device Role / Timing Role: Unidirectional TVS on each -48 V feed to protect hot-swap controllers and PMBus monitors. Use Value: Enables compliance with GR-1089-CORE Level 3 surge immunity while fitting tight board space constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/61 | Commercial-grade version; lacks AEC-Q101 qualification and automotive traceability | Approved for industrial/commercial use only; not permitted in automotive production BOMs | Select SMAJ14AHE3/61 when automotive qualification, lot traceability, and extended temperature validation are required. |
| SMAJ14CAHE3/61 | Bidirectional variant; symmetric VBR (15.6–17.2 V) and same VC (23.2 V), but no polarity marking | Suitable for AC-coupled or differential lines (e.g., RS-485, CAN) where bidirectional clamping is needed | Choose SMAJ14CAHE3/61 only if the protected node swings both positive and negative relative to ground. |
Compared with SMAJ14A-E3/61, the SMAJ14AHE3/61 adds automotive qualification and tighter process controls; compared with SMAJ14CAHE3/61, it provides directional clamping optimized for DC power rails with defined ground reference.
Availability
SMAJ14AHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power systems requiring stable component supply with AEC-Q101 assurance and consistent DO-214AC packaging.
Supply support for SMAJ14AHE3/61 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade robustness.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What does the "HE3" suffix mean in SMAJ14AHE3/61?
The "HE3" suffix in SMAJ14AHE3/61 indicates RoHS-compliant construction with AEC-Q101 qualification for automotive applications. It denotes halogen-free molding compound, matte tin-plated leads compliant with J-STD-002, and full traceability per automotive quality standards - distinguishing it from commercial-grade "E3" variants.
Is SMAJ14AHE3/61 unidirectional or bidirectional?
SMAJ14AHE3/61 is a unidirectional TVS diode, as confirmed by its part number ending in "A" (not "CA") and explicit polarity marking: the cathode band identifies the high-side terminal. It conducts only during positive transients relative to ground, making it ideal for DC power rail protection.
What is the clamping voltage of SMAJ14AHE3/61 under surge conditions?
The clamping voltage of SMAJ14AHE3/61 is 23.2 V measured at 17.2 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, ensuring predictable overvoltage limiting for protected ICs.
Can SMAJ14AHE3/61 replace SMAJ14A-E3/61 in an existing design?
Yes, SMAJ14AHE3/61 is a direct drop-in replacement for SMAJ14A-E3/61 in terms of electrical specs, package (SMA/DO-214AC), and pinout. However, SMAJ14AHE3/61 adds AEC-Q101 qualification and automotive traceability - critical for automotive production but optional for commercial use.
What is the maximum operating temperature for SMAJ14AHE3/61?
The maximum operating junction temperature for SMAJ14AHE3/61 is +150 °C, verified per AEC-Q101 stress testing. This allows deployment in under-hood automotive locations and high-ambient industrial enclosures without thermal derating of its 400 W pulse rating.
SMAJ14AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 17.2A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ14AHE3/61 FAQ
1.How can I place an order for SMAJ14AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14AHE3/61 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 SMAJ14AHE3/61 reliable?
The price and inventory of SMAJ14AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ14AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14AHE3/61?
SMAJ14AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14AHE3/61 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 SMAJ14AHE3/61?
For technical support, including SMAJ14AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14AHE3/61 requirements.
6.How does Aetrix verify that SMAJ14AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ14AHE3/61 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 SMAJ14AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ14AHE3/61?
All SMAJ14AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14AHE3/61, 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 SMAJ14AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ14AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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