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Vishay General Semiconductor - Diodes Division SMAJ14AHE3_A/H
- Part No.:
- SMAJ14AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14AHE3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,655
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Product details
Overview
SMAJ14AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 17.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ14AHE3_A/H datasheet, SMAJ14AHE3_A/H pinout, SMAJ14AHE3_A/H application, or SMAJ14AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 15.6–17.2 V breakdown range (VBR), low 1.0 μA leakage at VWM, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by overvoltage events exceeding its reverse standoff threshold. Its glass-passivated junction enables sub-nanosecond response to transients, while the unidirectional configuration provides forward conduction path only during reverse overvoltage, preserving normal DC bias integrity on protected lines.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) immunity standards when applied with appropriate layout-minimum 5.0 mm × 5.0 mm copper pad per terminal-and supports repetitive surge duty cycle up to 0.01 % at 400 W (derated to 300 W above 78 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 15.6 V / 17.2 V at 1.0 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction under normal operation. |
| VC @ IPPM | 23.2 V at 17.2 A - Clamped voltage limits stress on downstream components during 10/1000 μs surge events. |
| IPPM | 17.2 A - Peak surge current capability with defined waveform; determines minimum trace width and pad thermal design. |
| PPPM | 400 W - Surge energy handling capacity for 10/1000 μs pulses; derates linearly above TA = 25 °C per Fig. 2. |
| ID @ VWM | 1.0 μA - Low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Junction temperature limit enabling use in under-hood automotive environments and high-power industrial enclosures. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lowest potential rail; completes clamping path during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22-A114. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability across humidity and thermal stress. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow at peak 260 °C without preconditioning-ideal for high-volume SMT lines. |
| 400 W peak pulse rating | Supports IEC 61000-4-5 Level 3 (1 kV source impedance) surge protection on 12 V supply rails with minimal footprint. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V and 5 V logic interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between power input and local regulator input. Use Value: Limits voltage to ≤23.2 V during 17.2 A surges, preventing damage to LDOs and microcontrollers rated for 28 V absolute max. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive kickback in factory automation. IC Role / Device Role / Timing Role: Standoff-connected TVS on signal line, grounded at receiver end. Use Value: Sub-ns response clamps ±8 kV contact ESD (IEC 61000-4-2) to safe levels without distorting low-bandwidth analog signals. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding USB VBUS and D+/D− lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Discrete TVS array component with cathodes tied to VBUS and signal lines, anodes to ground. Use Value: 1.0 μA leakage avoids battery drain; 23.2 V clamping protects USB PHYs rated for 30 V abs max. | Use Scenario: Front-end surge suppression on Ethernet PHY power and data lines in base station equipment. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V/5 V bias rails feeding magnetics and PHY ICs. Use Value: 400 W rating handles lightning-induced surges (IEC 61000-4-5) without degradation across 1000+ events. |
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 | Same electrical specs and AEC-Q101 qualification; differs only in tape-and-reel packaging (61 code = 7" reel, 1800 pcs). | No functional difference; suitable for same PCB layouts and qualification testing. | Select SMAJ14AHE3_A/H for traceable lot control and automotive logistics compliance (H suffix denotes AEC-Q101 + RoHS + halogen-free). |
| SMBJ14AHE3_A/H | Same VWM/VC/IPPM, but in larger SMB (DO-214AA) package with higher 600 W PPPM rating and 25.1 V VC. | Higher surge margin and thermal mass; requires larger PCB footprint and different pad layout. | Choose SMBJ14AHE3_A/H where system-level surge tests exceed 400 W or board space allows larger package. |
Compared with SMAJ14A-E3/61, SMAJ14AHE3_A/H offers identical protection performance with enhanced logistics traceability; versus SMBJ14AHE3_A/H, it trades 200 W surge headroom for 30 % smaller footprint and tighter VC spec-critical for space-constrained automotive modules.
Availability
SMAJ14AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and RoHS/halogen-free compliance.
Supply support for SMAJ14AHE3_A/H 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 validation.
The SMAJ series was developed specifically for high-reliability transient suppression in harsh environments-targeting 12 V and 24 V automotive subsystems, industrial PLC I/O modules, and telecom power supplies where compact size and repeatable clamping are critical.
FAQ
What is the breakdown voltage range of SMAJ14AHE3_A/H?
The SMAJ14AHE3_A/H has a guaranteed breakdown voltage (VBR) range of 15.6 V to 17.2 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots and temperature extremes, directly supporting design margin calculations for 12 V systems where VBR must exceed VWM (14 V) while remaining below downstream IC absolute maximum ratings. The SMAJ14AHE3_A/H datasheet specifies this range in Table 1 under "BREAKDOWN VOLTAGE VBR AT IT".
Is SMAJ14AHE3_A/H suitable for automotive applications?
Yes, SMAJ14AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix (RoHS-compliant and AEC-Q101 qualified). It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness per JESD22 standards, and is rated for operation from −55 °C to +150 °C junction temperature. The SMAJ14AHE3_A/H is commonly deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces where certified reliability is mandatory.
What is the maximum clamping voltage of SMAJ14AHE3_A/H at its rated surge current?
The SMAJ14AHE3_A/H has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current (IPPM) of 17.2 A, tested with a 10/1000 μs waveform. This value represents the worst-case voltage seen by protected circuitry during a full-rated surge event and is critical for verifying that downstream components-such as 28 V-rated regulators or 30 V-tolerant USB PHYs-remain within their absolute maximum voltage limits. The SMAJ14AHE3_A/H achieves this clamping performance due to low incremental surge resistance and optimized junction design.
Does SMAJ14AHE3_A/H have bidirectional capability?
No, SMAJ14AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix (versus "CA" for bidirectional variants). It conducts only during reverse-biased overvoltage events, with the cathode band marking the transient-current sink terminal. For AC-coupled or dual-polarity signal lines, a bidirectional part such as SMAJ14CAHE3_A/H would be required. The SMAJ14AHE3_A/H datasheet confirms unidirectional polarity in the "Polarity" section and lists "UNI" under DEVICE TYPE in the Electrical Characteristics table.
What package type does SMAJ14AHE3_A/H use and what are its mounting requirements?
SMAJ14AHE3_A/H uses the SMA (DO-214AC) surface-mount package, with dimensions of 4.50 mm × 2.79 mm × 2.29 mm and matte tin-plated leads. Mounting requires minimum 5.0 mm × 5.0 mm copper pads per terminal (per datasheet Fig. 1 and Thermal Characteristics table) to sustain 400 W pulse power and achieve specified RθJA of 120 °C/W. The SMAJ14AHE3_A/H is MSL Level 1 compliant, allowing reflow at 260 °C peak without baking, and supports automated placement per its low-profile geometry and J-STD-002 solderability certification.
SMAJ14AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 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_A/H FAQ
1.How can I place an order for SMAJ14AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14AHE3_A/H 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_A/H reliable?
The price and inventory of SMAJ14AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ14AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14AHE3_A/H?
SMAJ14AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14AHE3_A/H 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_A/H?
For technical support, including SMAJ14AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ14AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ14AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ14AHE3_A/H?
All SMAJ14AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMAJ14AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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