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Vishay General Semiconductor - Diodes Division SMAJ16AHE3_A/H
- Part No.:
- SMAJ16AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AHE3_A/H.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,450
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Product details
Overview
SMAJ16AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. 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, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ16AHE3_A/H datasheet, SMAJ16AHE3_A/H pinout, SMAJ16AHE3_A/H application, or SMAJ16AHE3_A/H equivalent, key selection criteria include clamping performance under 15.4 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional shunt protector, leveraging an avalanche breakdown mechanism to clamp transient overvoltages above its VBR threshold while maintaining low leakage (<1.0 μA at 16 V). Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 - confirming suitability for automotive under-hood and infotainment applications where thermal cycling and vibration resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 17.8 V / 19.7 V at 1 mA - defines precise avalanche onset window for predictable protection threshold |
| VC @ IPPM | 26.0 V at 15.4 A - clamped voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capability under standard lightning-surge waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, informs PCB pad design for thermal management |
| TJ max | +150 °C - maximum junction temperature, enabling operation in high-ambient automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. 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 voltage exceeds VBR |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability across temperature, humidity, and mechanical stress tests |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when mounted on 5 mm × 5 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to downstream MOSFETs or microcontrollers during transients |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking, reducing manufacturing complexity and cost |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to surface contamination or humidity-induced drift |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VCC and GND, clamping transients within 1 ns response time. Use Value: Limits voltage to ≤26.0 V during 15.4 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) suppressing ESD and inductive kickback on signal return paths. Use Value: Maintains signal integrity with <1.0 μA leakage at 16 V, avoiding offset errors in precision current sensing. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-level protection on VBUS line of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ±8 kV contact ESD per IEC 61000-4-2, placed upstream of USB switch IC. Use Value: Clamps to 26.0 V within nanoseconds, preventing damage to internal USB PHY transceivers rated for 5.5 V absolute max. | Use Scenario: Front-end surge protection for Ethernet PHY interface lines in DSLAM line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary shunt protector on differential pair, coordinated with common-mode chokes and secondary TVS arrays. Use Value: Handles 400 W 10/1000 μs pulses per ITU-T K.21 Basic Level, extending board-level surge withstand beyond 6 kV. |
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; not suitable for under-hood or safety-critical modules | Select when cost-sensitive consumer or industrial designs do not require AEC-Q101 validation |
| SMAJ16CAHE3_A/H | Bidirectional variant; symmetric VBR (17.8–19.7 V) in both polarities; same clamping and power ratings | Used where AC-coupled or floating signal lines require protection against polarity-reversal transients | Choose for RS-485, CAN bus, or audio line protection where bidirectional clamping is mandatory |
Compared with SMAJ16AHE3_A/H, SMAJ16A-E3/61 offers identical protection performance without automotive qualification, while SMAJ16CAHE3_A/H provides symmetrical clamping essential for AC signal paths - neither is pin-compatible drop-in replacements but serve distinct circuit topology needs.
Availability
SMAJ16AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor nodes, and telecom line card development requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMAJ16AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the maximum clamping voltage of SMAJ16AHE3_A/H at its rated peak pulse current?
The SMAJ16AHE3_A/H has a maximum clamping voltage (VC) of 26.0 V at its rated peak pulse current (IPPM) of 15.4 A, measured under the standard 10/1000 μs double-exponential surge waveform. This value ensures protected circuits remain below critical overvoltage thresholds during transient events, and is verified per Vishay's datasheet revision 09-Jan-2024, page 2.
Is SMAJ16AHE3_A/H qualified to AEC-Q101, and what does that qualification cover?
Yes, SMAJ16AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in the Vishay datasheet (Document Number: 88390). This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), accelerated life testing, and ESD - validating reliability for automotive under-hood and cabin applications.
What is the thermal resistance and how does it affect PCB layout for SMAJ16AHE3_A/H?
SMAJ16AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. To maintain safe junction temperatures under repeated surges, designers must provide adequate copper area and avoid excessive trace length - insufficient copper increases RθJA and risks thermal runaway during high-duty-cycle transients.
Does SMAJ16AHE3_A/H have polarity marking, and how is it oriented in circuit?
Yes, SMAJ16AHE3_A/H is unidirectional and marked with a cathode band at one end. In circuit, the banded (cathode) terminal connects to the line being protected (e.g., VCC or signal), while the unbanded (anode) terminal connects to ground - ensuring proper avalanche conduction during positive-going transients. Reverse orientation prevents clamping and may cause device failure.
What is the standoff voltage and why is it critical for selecting SMAJ16AHE3_A/H?
The standoff voltage (VWM) of SMAJ16AHE3_A/H is 16 V - the maximum continuous reverse voltage the device blocks without significant leakage (<1.0 μA). This parameter is critical because it must exceed the normal operating voltage of the protected line (e.g., 12 V automotive rail) while remaining safely below the breakdown threshold, ensuring no false triggering during nominal operation while preserving margin for transients.
SMAJ16AHE3_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):
- 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/H FAQ
1.How can I place an order for SMAJ16AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AHE3_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 SMAJ16AHE3_A/H reliable?
The price and inventory of SMAJ16AHE3_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 SMAJ16AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ16AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AHE3_A/H?
SMAJ16AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AHE3_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 SMAJ16AHE3_A/H?
For technical support, including SMAJ16AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ16AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ16AHE3_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 SMAJ16AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ16AHE3_A/H?
All SMAJ16AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AHE3_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 SMAJ16AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ16AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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