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Vishay General Semiconductor - Diodes Division SMAJ16AHE3_A/I
- Part No.:
- SMAJ16AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AHE3_A/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,565
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Product details
Overview
SMAJ16AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown voltage (VBR) at 1 mA, 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), commonly deployed to protect MOSFET gates and microcontroller I/O in automotive body electronics.
For engineers reviewing the SMAJ16AHE3_A/I datasheet, SMAJ16AHE3_A/I pinout, SMAJ16AHE3_A/I application, or SMAJ16AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a clamping device-conducting above its breakdown voltage to limit transient overvoltage across protected circuit nodes. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while the SMA package provides thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead).
The SMAJ16AHE3_A/I is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports 3.3 W steady-state power dissipation at 50 °C ambient, and exhibits a +0.089 %/°C temperature coefficient of VBR-enabling predictable voltage shift over temperature in automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 17.8 V / 19.7 V at 1 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | 26.0 V at 15.4 A - Clamped voltage during 10/1000 μs transient, limiting stress on downstream ICs |
| PPPM | 400 W - Peak pulse power handling capability per standard 10/1000 μs waveform |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive zones |
| IFSM | 40 A - Single half-sine surge rating (8.3 ms), critical for load-dump immunity |
| Package | SMA (DO-214AC) - Surface-mount outline with cathode band marking, MSL Level 1 compliant |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, 0.208" × 0.157" footprint, cathode indicated by a band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or reference node; conducts when cathode voltage exceeds anode by ≥VBR |
| Cathode | High-side connection; marked with band | Connected to protected line (e.g., 12 V rail or signal trace); defines polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body controllers |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a transients without degradation when mounted per recommended pad layout |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage margin between clamp onset and protection threshold, enhancing system robustness |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term reliability under thermal cycling |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceiver inputs against load dump and ESD events in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between LIN line and ground, absorbing transients before they reach the transceiver's ESD diodes. Use Value: Limits voltage to ≤26.0 V during 10/1000 μs surges, preventing latch-up or permanent damage to the LIN PHY IC. | Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controller (PLC) I/O cards exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to shunt inductive kickback energy away from optocoupler input stages. Use Value: Clamps 400 W transients within 1 ns, maintaining input logic integrity and eliminating false triggering during field wiring faults. |
| Consumer Appliance Motor Drive | Telecom Power Supply Rail |
Use Scenario: Suppressing commutation spikes on brushed DC motor driver outputs in smart home appliances. IC Role / Device Role / Timing Role: Unidirectional TVS placed across H-bridge high-side FET drain-source to clamp inductive energy during PWM switching. Use Value: Withstands repetitive 15.4 A surges at 0.01% duty cycle, extending MOSFET lifetime and reducing EMI emissions. | Use Scenario: Secondary-side overvoltage protection on 12 V telecom power supply outputs feeding baseband processors. IC Role / Device Role / Timing Role: Standoff-clamp TVS installed between output rail and ground to prevent brownout recovery overshoot from damaging downstream ASICs. Use Value: Maintains 16 V nominal rail integrity while clamping excursions to ≤26.0 V, ensuring safe reset behavior after AC dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A-E3/61 | Same electrical specs, RoHS-compliant commercial grade (non-AEC-Q101) | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules | Select when cost-sensitive industrial or consumer designs do not require AEC-Q101 validation |
| SMAJ16CAHE3_A/I | Bidirectional variant; symmetric VBR (17.8–19.7 V) in both polarities; same package and power rating | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Choose for bidirectional protection needs; not interchangeable without circuit review due to polarity architecture |
Compared with SMAJ16A-E3/61 and SMAJ16CAHE3_A/I, the SMAJ16AHE3_A/I uniquely combines AEC-Q101 qualification, unidirectional clamping, and 16 V standoff-making it the only option certified for automotive power-line protection where polarity is fixed and reliability is mandated.
Availability
SMAJ16AHE3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance motor drive circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ16AHE3_A/I 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 automotive-grade qualification.
The SMAJ series is engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of the SMAJ16AHE3_A/I at its rated peak pulse current?
The SMAJ16AHE3_A/I has a maximum clamping voltage (VC) of 26.0 V at its rated peak pulse current (IPPM) of 15.4 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ16AHE3_A/I maintains this clamping performance across its specified operating temperature range.
Is the SMAJ16AHE3_A/I qualified for automotive applications?
Yes, the SMAJ16AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88390. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock-validating suitability for automotive powertrain, chassis, and body electronics. The SMAJ16AHE3_A/I meets these requirements while retaining full 400 W pulse power capability and 150 °C junction temperature rating.
What does the "HE3" suffix indicate in SMAJ16AHE3_A/I?
The "HE3" suffix in SMAJ16AHE3_A/I denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade variants like "E3". The "H" indicates halogen-free molding compound, "E3" confirms RoHS compliance, and the qualification status is verified per JESD22 and AEC test plans. This suffix directly maps to Vishay's material categorization and reliability assurance framework for automotive use cases.
Can the SMAJ16AHE3_A/I be used in bidirectional signal protection?
No, the SMAJ16AHE3_A/I is unidirectional and must not be used for bidirectional signal lines such as RS-485 or CAN without external circuitry. Its cathode-band polarity restricts conduction to reverse-bias conditions only. For bidirectional protection, the SMAJ16CAHE3_A/I variant-identical in package and power rating but symmetrically rated-is required. Using SMAJ16AHE3_A/I in place of a bidirectional TVS risks failure during positive-going transients.
What is the thermal resistance of the SMAJ16AHE3_A/I in standard mounting conditions?
The SMAJ16AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay datasheet 88390. Its junction-to-lead resistance (RθJL) is 30 °C/W. These values govern steady-state power derating above 25 °C ambient and are essential for validating thermal margin in high-reliability automotive PCB layouts.
SMAJ16AHE3_A/I 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMAJ16AHE3_A/I FAQ
1.How can I place an order for SMAJ16AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AHE3_A/I 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 SMAJ16AHE3_A/I reliable?
The price and inventory of SMAJ16AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ16AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AHE3_A/I?
SMAJ16AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AHE3_A/I 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 SMAJ16AHE3_A/I?
For technical support, including SMAJ16AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AHE3_A/I requirements.
6.How does Aetrix verify that SMAJ16AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ16AHE3_A/I 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 SMAJ16AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ16AHE3_A/I?
All SMAJ16AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AHE3_A/I, 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 SMAJ16AHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ16AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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